File nss-compat.patch of Package glibc.13450
2017-10-04 Andreas Schwab <schwab@suse.de>
* nis/Makefile (services): Remove compat.
(libnss_compat-routines, libnss_compat-inhibit-o): Don't define.
($(objpfx)libnss_compat.so): Remove rule.
* nis/Versions (libnss_compat): Remove.
* nss/Makefile (services): Add compat.
(libnss_compat-routines, libnss_compat-inhibit-o): Define.
* nss/Versions (libnss_compat): Define.
* nss/nss_compat/compat-grp.c: Moved here from nis/nss_compat.
Don't include <rpc/types.h>. Replace bool_t by bool.
* nss/nss_compat/compat-initgroups.c: Likewise.
* nss/nss_compat/compat-pwd.c: Likewise. Include "nisdomain.h"
instead of <rpcsrv/ypclnt.h>.
(getpwent_next_nss_netgr): Use __nss_get_default_domain instead of
yp_get_default_domain.
* nss/nss_compat/compat-pwd.c: Likewise.
(getspent_next_nss_netgr): Use __nss_get_default_domain instead of
yp_get_default_domain.
* nss/nss_compat/nisdomain.c: New file.
* nss/nss_compat/nisdomain.h: Likewise.
Index: glibc-2.26/nis/Makefile
===================================================================
--- glibc-2.26.orig/nis/Makefile
+++ glibc-2.26/nis/Makefile
@@ -33,7 +33,7 @@ databases = proto service hosts network
spwd netgrp alias publickey
# Specify rules for the nss_* modules.
-services := nis nisplus compat
+services := nis nisplus
endif
extra-libs = libnsl
@@ -63,9 +63,6 @@ libnsl-routines = yp_xdr ypclnt ypupdate
nis_clone_res nss-default
ifeq ($(build-obsolete-nsl),yes)
-libnss_compat-routines := $(addprefix compat-,grp pwd spwd initgroups)
-libnss_compat-inhibit-o = $(filter-out .os,$(object-suffixes))
-
libnss_nis-routines := $(addprefix nis-,$(databases)) nis-initgroups \
nss-nis
libnss_nis-inhibit-o = $(filter-out .os,$(object-suffixes))
@@ -79,7 +76,6 @@ include ../Rules
ifeq ($(build-obsolete-nsl),yes)
-$(objpfx)libnss_compat.so: $(objpfx)libnsl.so$(libnsl.so-version)
$(objpfx)libnss_nis.so: $(objpfx)libnsl.so$(libnsl.so-version) \
$(common-objpfx)nss/libnss_files.so
$(objpfx)libnss_nisplus.so: $(objpfx)libnsl.so$(libnsl.so-version)
Index: glibc-2.26/nis/Versions
===================================================================
--- glibc-2.26.orig/nis/Versions
+++ glibc-2.26/nis/Versions
@@ -63,17 +63,6 @@ libnsl {
}
}
-libnss_compat {
- GLIBC_PRIVATE {
- _nss_compat_endgrent; _nss_compat_endpwent; _nss_compat_endspent;
- _nss_compat_getgrent_r; _nss_compat_getgrgid_r; _nss_compat_getgrnam_r;
- _nss_compat_getpwent_r; _nss_compat_getpwnam_r; _nss_compat_getpwuid_r;
- _nss_compat_getspent_r; _nss_compat_getspnam_r;
- _nss_compat_setgrent; _nss_compat_setpwent; _nss_compat_setspent;
- _nss_compat_initgroups_dyn;
- }
-}
-
libnss_nis {
GLIBC_PRIVATE {
_nss_nis_endaliasent; _nss_nis_endetherent; _nss_nis_endgrent;
Index: glibc-2.26/nis/nss_compat/compat-grp.c
===================================================================
--- glibc-2.26.orig/nis/nss_compat/compat-grp.c
+++ /dev/null
@@ -1,683 +0,0 @@
-/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <grp.h>
-#include <nss.h>
-#include <nsswitch.h>
-#include <stdio_ext.h>
-#include <string.h>
-#include <rpc/types.h>
-#include <libc-lock.h>
-#include <kernel-features.h>
-
-static service_user *ni;
-static enum nss_status (*nss_setgrent) (int stayopen);
-static enum nss_status (*nss_getgrnam_r) (const char *name,
- struct group * grp, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_getgrgid_r) (gid_t gid, struct group * grp,
- char *buffer, size_t buflen,
- int *errnop);
-static enum nss_status (*nss_getgrent_r) (struct group * grp, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_endgrent) (void);
-
-/* Get the declaration of the parser function. */
-#define ENTNAME grent
-#define STRUCTURE group
-#define EXTERN_PARSER
-#include <nss/nss_files/files-parse.c>
-
-/* Structure for remembering -group members ... */
-#define BLACKLIST_INITIAL_SIZE 512
-#define BLACKLIST_INCREMENT 256
-struct blacklist_t
-{
- char *data;
- int current;
- int size;
-};
-
-struct ent_t
-{
- bool_t files;
- enum nss_status setent_status;
- FILE *stream;
- struct blacklist_t blacklist;
-};
-typedef struct ent_t ent_t;
-
-static ent_t ext_ent = { TRUE, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
-
-/* Protect global state against multiple changers. */
-__libc_lock_define_initialized (static, lock)
-
-/* Prototypes for local functions. */
-static void blacklist_store_name (const char *, ent_t *);
-static int in_blacklist (const char *, int, ent_t *);
-
-/* Initialize the NSS interface/functions. The calling function must
- hold the lock. */
-static void
-init_nss_interface (void)
-{
- if (__nss_database_lookup ("group_compat", NULL, "nis", &ni) >= 0)
- {
- nss_setgrent = __nss_lookup_function (ni, "setgrent");
- nss_getgrnam_r = __nss_lookup_function (ni, "getgrnam_r");
- nss_getgrgid_r = __nss_lookup_function (ni, "getgrgid_r");
- nss_getgrent_r = __nss_lookup_function (ni, "getgrent_r");
- nss_endgrent = __nss_lookup_function (ni, "endgrent");
- }
-}
-
-static enum nss_status
-internal_setgrent (ent_t *ent, int stayopen, int needent)
-{
- enum nss_status status = NSS_STATUS_SUCCESS;
-
- ent->files = TRUE;
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- if (ent->stream == NULL)
- {
- ent->stream = fopen ("/etc/group", "rme");
-
- if (ent->stream == NULL)
- status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
- else
- /* We take care of locking ourself. */
- __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
- }
- else
- rewind (ent->stream);
-
- if (needent && status == NSS_STATUS_SUCCESS && nss_setgrent)
- ent->setent_status = nss_setgrent (stayopen);
-
- return status;
-}
-
-
-enum nss_status
-_nss_compat_setgrent (int stayopen)
-{
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- result = internal_setgrent (&ext_ent, stayopen, 1);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-
-static enum nss_status
-internal_endgrent (ent_t *ent)
-{
- if (ent->stream != NULL)
- {
- fclose (ent->stream);
- ent->stream = NULL;
- }
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_endgrent (void)
-{
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (nss_endgrent)
- nss_endgrent ();
-
- result = internal_endgrent (&ext_ent);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-/* get the next group from NSS (+ entry) */
-static enum nss_status
-getgrent_next_nss (struct group *result, ent_t *ent, char *buffer,
- size_t buflen, int *errnop)
-{
- if (!nss_getgrent_r)
- return NSS_STATUS_UNAVAIL;
-
- /* If the setgrent call failed, say so. */
- if (ent->setent_status != NSS_STATUS_SUCCESS)
- return ent->setent_status;
-
- do
- {
- enum nss_status status;
-
- if ((status = nss_getgrent_r (result, buffer, buflen, errnop)) !=
- NSS_STATUS_SUCCESS)
- return status;
- }
- while (in_blacklist (result->gr_name, strlen (result->gr_name), ent));
-
- return NSS_STATUS_SUCCESS;
-}
-
-/* This function handle the +group entrys in /etc/group */
-static enum nss_status
-getgrnam_plusgroup (const char *name, struct group *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- if (!nss_getgrnam_r)
- return NSS_STATUS_UNAVAIL;
-
- enum nss_status status = nss_getgrnam_r (name, result, buffer, buflen,
- errnop);
- if (status != NSS_STATUS_SUCCESS)
- return status;
-
- if (in_blacklist (result->gr_name, strlen (result->gr_name), ent))
- return NSS_STATUS_NOTFOUND;
-
- /* We found the entry. */
- return NSS_STATUS_SUCCESS;
-}
-
-static enum nss_status
-getgrent_next_file (struct group *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
- while (1)
- {
- fpos_t pos;
- int parse_res = 0;
- char *p;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
- /* This is a real entry. */
- break;
-
- /* -group */
- if (result->gr_name[0] == '-' && result->gr_name[1] != '\0'
- && result->gr_name[1] != '@')
- {
- blacklist_store_name (&result->gr_name[1], ent);
- continue;
- }
-
- /* +group */
- if (result->gr_name[0] == '+' && result->gr_name[1] != '\0'
- && result->gr_name[1] != '@')
- {
- size_t len = strlen (result->gr_name);
- char buf[len];
- enum nss_status status;
-
- /* Store the group in the blacklist for the "+" at the end of
- /etc/group */
- memcpy (buf, &result->gr_name[1], len);
- status = getgrnam_plusgroup (&result->gr_name[1], result, ent,
- buffer, buflen, errnop);
- blacklist_store_name (buf, ent);
- if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
- break;
- else if (status == NSS_STATUS_RETURN /* We couldn't parse the entry*/
- || status == NSS_STATUS_NOTFOUND) /* No group in NIS */
- continue;
- else
- {
- if (status == NSS_STATUS_TRYAGAIN)
- /* The parser ran out of space. */
- goto erange_reset;
-
- return status;
- }
- }
-
- /* +:... */
- if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
- {
- ent->files = FALSE;
-
- return getgrent_next_nss (result, ent, buffer, buflen, errnop);
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_compat_getgrent_r (struct group *grp, char *buffer, size_t buflen,
- int *errnop)
-{
- enum nss_status result = NSS_STATUS_SUCCESS;
-
- __libc_lock_lock (lock);
-
- /* Be prepared that the setgrent function was not called before. */
- if (ni == NULL)
- init_nss_interface ();
-
- if (ext_ent.stream == NULL)
- result = internal_setgrent (&ext_ent, 1, 1);
-
- if (result == NSS_STATUS_SUCCESS)
- {
- if (ext_ent.files)
- result = getgrent_next_file (grp, &ext_ent, buffer, buflen, errnop);
- else
- result = getgrent_next_nss (grp, &ext_ent, buffer, buflen, errnop);
- }
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-/* Searches in /etc/group and the NIS/NIS+ map for a special group */
-static enum nss_status
-internal_getgrnam_r (const char *name, struct group *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
- while (1)
- {
- fpos_t pos;
- int parse_res = 0;
- char *p;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- /* This is a real entry. */
- if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
- {
- if (strcmp (result->gr_name, name) == 0)
- return NSS_STATUS_SUCCESS;
- else
- continue;
- }
-
- /* -group */
- if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
- {
- if (strcmp (&result->gr_name[1], name) == 0)
- return NSS_STATUS_NOTFOUND;
- else
- continue;
- }
-
- /* +group */
- if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
- {
- if (strcmp (name, &result->gr_name[1]) == 0)
- {
- enum nss_status status;
-
- status = getgrnam_plusgroup (name, result, ent,
- buffer, buflen, errnop);
- if (status == NSS_STATUS_RETURN)
- /* We couldn't parse the entry */
- continue;
- else
- return status;
- }
- }
- /* +:... */
- if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
- {
- enum nss_status status;
-
- status = getgrnam_plusgroup (name, result, ent,
- buffer, buflen, errnop);
- if (status == NSS_STATUS_RETURN)
- /* We couldn't parse the entry */
- continue;
- else
- return status;
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_getgrnam_r (const char *name, struct group *grp,
- char *buffer, size_t buflen, int *errnop)
-{
- ent_t ent = { TRUE, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
- enum nss_status result;
-
- if (name[0] == '-' || name[0] == '+')
- return NSS_STATUS_NOTFOUND;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- __libc_lock_unlock (lock);
-
- result = internal_setgrent (&ent, 0, 0);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getgrnam_r (name, grp, &ent, buffer, buflen, errnop);
-
- internal_endgrent (&ent);
-
- return result;
-}
-
-/* Searches in /etc/group and the NIS/NIS+ map for a special group id */
-static enum nss_status
-internal_getgrgid_r (gid_t gid, struct group *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
- while (1)
- {
- fpos_t pos;
- int parse_res = 0;
- char *p;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- /* This is a real entry. */
- if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
- {
- if (result->gr_gid == gid)
- return NSS_STATUS_SUCCESS;
- else
- continue;
- }
-
- /* -group */
- if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
- {
- blacklist_store_name (&result->gr_name[1], ent);
- continue;
- }
-
- /* +group */
- if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
- {
- /* Yes, no +1, see the memcpy call below. */
- size_t len = strlen (result->gr_name);
- char buf[len];
- enum nss_status status;
-
- /* Store the group in the blacklist for the "+" at the end of
- /etc/group */
- memcpy (buf, &result->gr_name[1], len);
- status = getgrnam_plusgroup (&result->gr_name[1], result, ent,
- buffer, buflen, errnop);
- blacklist_store_name (buf, ent);
- if (status == NSS_STATUS_SUCCESS && result->gr_gid == gid)
- break;
- else
- continue;
- }
- /* +:... */
- if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
- {
- if (!nss_getgrgid_r)
- return NSS_STATUS_UNAVAIL;
-
- enum nss_status status = nss_getgrgid_r (gid, result, buffer, buflen,
- errnop);
- if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_getgrgid_r (gid_t gid, struct group *grp,
- char *buffer, size_t buflen, int *errnop)
-{
- ent_t ent = { TRUE, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- __libc_lock_unlock (lock);
-
- result = internal_setgrent (&ent, 0, 0);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getgrgid_r (gid, grp, &ent, buffer, buflen, errnop);
-
- internal_endgrent (&ent);
-
- return result;
-}
-
-
-/* Support routines for remembering -@netgroup and -user entries.
- The names are stored in a single string with `|' as separator. */
-static void
-blacklist_store_name (const char *name, ent_t *ent)
-{
- int namelen = strlen (name);
- char *tmp;
-
- /* first call, setup cache */
- if (ent->blacklist.size == 0)
- {
- ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
- ent->blacklist.data = malloc (ent->blacklist.size);
- if (ent->blacklist.data == NULL)
- return;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- ent->blacklist.current = 1;
- }
- else
- {
- if (in_blacklist (name, namelen, ent))
- return; /* no duplicates */
-
- if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
- {
- ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
- tmp = realloc (ent->blacklist.data, ent->blacklist.size);
- if (tmp == NULL)
- {
- free (ent->blacklist.data);
- ent->blacklist.size = 0;
- return;
- }
- ent->blacklist.data = tmp;
- }
- }
-
- tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
- *tmp++ = '|';
- *tmp = '\0';
- ent->blacklist.current += namelen + 1;
-
- return;
-}
-
-/* returns TRUE if ent->blacklist contains name, else FALSE */
-static bool_t
-in_blacklist (const char *name, int namelen, ent_t *ent)
-{
- char buf[namelen + 3];
- char *cp;
-
- if (ent->blacklist.data == NULL)
- return FALSE;
-
- buf[0] = '|';
- cp = stpcpy (&buf[1], name);
- *cp++ = '|';
- *cp = '\0';
- return strstr (ent->blacklist.data, buf) != NULL;
-}
Index: glibc-2.26/nis/nss_compat/compat-initgroups.c
===================================================================
--- glibc-2.26.orig/nis/nss_compat/compat-initgroups.c
+++ /dev/null
@@ -1,576 +0,0 @@
-/* Copyright (C) 1998-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <grp.h>
-#include <nss.h>
-#include <stdio_ext.h>
-#include <string.h>
-#include <unistd.h>
-#include <rpc/types.h>
-#include <sys/param.h>
-#include <nsswitch.h>
-#include <libc-lock.h>
-#include <kernel-features.h>
-#include <scratch_buffer.h>
-
-static service_user *ni;
-/* Type of the lookup function. */
-static enum nss_status (*nss_initgroups_dyn) (const char *, gid_t,
- long int *, long int *,
- gid_t **, long int, int *);
-static enum nss_status (*nss_getgrnam_r) (const char *name,
- struct group * grp, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_getgrgid_r) (gid_t gid, struct group * grp,
- char *buffer, size_t buflen,
- int *errnop);
-static enum nss_status (*nss_setgrent) (int stayopen);
-static enum nss_status (*nss_getgrent_r) (struct group * grp, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_endgrent) (void);
-
-/* Protect global state against multiple changers. */
-__libc_lock_define_initialized (static, lock)
-
-
-/* Get the declaration of the parser function. */
-#define ENTNAME grent
-#define STRUCTURE group
-#define EXTERN_PARSER
-#include <nss/nss_files/files-parse.c>
-
-/* Structure for remembering -group members ... */
-#define BLACKLIST_INITIAL_SIZE 512
-#define BLACKLIST_INCREMENT 256
-struct blacklist_t
-{
- char *data;
- int current;
- int size;
-};
-
-struct ent_t
-{
- bool files;
- bool need_endgrent;
- bool skip_initgroups_dyn;
- FILE *stream;
- struct blacklist_t blacklist;
-};
-typedef struct ent_t ent_t;
-
-/* Prototypes for local functions. */
-static void blacklist_store_name (const char *, ent_t *);
-static int in_blacklist (const char *, int, ent_t *);
-
-/* Initialize the NSS interface/functions. The calling function must
- hold the lock. */
-static void
-init_nss_interface (void)
-{
- __libc_lock_lock (lock);
-
- /* Retest. */
- if (ni == NULL
- && __nss_database_lookup ("group_compat", NULL, "nis", &ni) >= 0)
- {
- nss_initgroups_dyn = __nss_lookup_function (ni, "initgroups_dyn");
- nss_getgrnam_r = __nss_lookup_function (ni, "getgrnam_r");
- nss_getgrgid_r = __nss_lookup_function (ni, "getgrgid_r");
- nss_setgrent = __nss_lookup_function (ni, "setgrent");
- nss_getgrent_r = __nss_lookup_function (ni, "getgrent_r");
- nss_endgrent = __nss_lookup_function (ni, "endgrent");
- }
-
- __libc_lock_unlock (lock);
-}
-
-static enum nss_status
-internal_setgrent (ent_t *ent)
-{
- enum nss_status status = NSS_STATUS_SUCCESS;
-
- ent->files = true;
-
- if (ni == NULL)
- init_nss_interface ();
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- ent->stream = fopen ("/etc/group", "rme");
-
- if (ent->stream == NULL)
- status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
- else
- /* We take care of locking ourself. */
- __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
-
- return status;
-}
-
-
-static enum nss_status
-internal_endgrent (ent_t *ent)
-{
- if (ent->stream != NULL)
- {
- fclose (ent->stream);
- ent->stream = NULL;
- }
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- if (ent->need_endgrent && nss_endgrent != NULL)
- nss_endgrent ();
-
- return NSS_STATUS_SUCCESS;
-}
-
-/* Add new group record. */
-static void
-add_group (long int *start, long int *size, gid_t **groupsp, long int limit,
- gid_t gid)
-{
- gid_t *groups = *groupsp;
-
- /* Matches user. Insert this group. */
- if (__glibc_unlikely (*start == *size))
- {
- /* Need a bigger buffer. */
- gid_t *newgroups;
- long int newsize;
-
- if (limit > 0 && *size == limit)
- /* We reached the maximum. */
- return;
-
- if (limit <= 0)
- newsize = 2 * *size;
- else
- newsize = MIN (limit, 2 * *size);
-
- newgroups = realloc (groups, newsize * sizeof (*groups));
- if (newgroups == NULL)
- return;
- *groupsp = groups = newgroups;
- *size = newsize;
- }
-
- groups[*start] = gid;
- *start += 1;
-}
-
-/* This function checks, if the user is a member of this group and if
- yes, add the group id to the list. Return nonzero is we couldn't
- handle the group because the user is not in the member list. */
-static int
-check_and_add_group (const char *user, gid_t group, long int *start,
- long int *size, gid_t **groupsp, long int limit,
- struct group *grp)
-{
- char **member;
-
- /* Don't add main group to list of groups. */
- if (grp->gr_gid == group)
- return 0;
-
- for (member = grp->gr_mem; *member != NULL; ++member)
- if (strcmp (*member, user) == 0)
- {
- add_group (start, size, groupsp, limit, grp->gr_gid);
- return 0;
- }
-
- return 1;
-}
-
-/* Get the next group from NSS (+ entry). If the NSS module supports
- initgroups_dyn, get all entries at once. */
-static enum nss_status
-getgrent_next_nss (ent_t *ent, char *buffer, size_t buflen, const char *user,
- gid_t group, long int *start, long int *size,
- gid_t **groupsp, long int limit, int *errnop)
-{
- enum nss_status status;
- struct group grpbuf;
-
- /* Try nss_initgroups_dyn if supported. We also need getgrgid_r.
- If this function is not supported, step through the whole group
- database with getgrent_r. */
- if (! ent->skip_initgroups_dyn)
- {
- long int mystart = 0;
- long int mysize = limit <= 0 ? *size : limit;
- gid_t *mygroups = malloc (mysize * sizeof (gid_t));
-
- if (mygroups == NULL)
- return NSS_STATUS_TRYAGAIN;
-
- /* For every gid in the list we get from the NSS module,
- get the whole group entry. We need to do this, since we
- need the group name to check if it is in the blacklist.
- In worst case, this is as twice as slow as stepping with
- getgrent_r through the whole group database. But for large
- group databases this is faster, since the user can only be
- in a limited number of groups. */
- if (nss_initgroups_dyn (user, group, &mystart, &mysize, &mygroups,
- limit, errnop) == NSS_STATUS_SUCCESS)
- {
- status = NSS_STATUS_NOTFOUND;
-
- /* If there is no blacklist we can trust the underlying
- initgroups implementation. */
- if (ent->blacklist.current <= 1)
- for (int i = 0; i < mystart; i++)
- add_group (start, size, groupsp, limit, mygroups[i]);
- else
- {
- /* A temporary buffer. We use the normal buffer, until we find
- an entry, for which this buffer is to small. In this case, we
- overwrite the pointer with one to a bigger buffer. */
- char *tmpbuf = buffer;
- size_t tmplen = buflen;
- bool use_malloc = false;
-
- for (int i = 0; i < mystart; i++)
- {
- while ((status = nss_getgrgid_r (mygroups[i], &grpbuf,
- tmpbuf, tmplen, errnop))
- == NSS_STATUS_TRYAGAIN
- && *errnop == ERANGE)
- {
- if (__libc_use_alloca (tmplen * 2))
- {
- if (tmpbuf == buffer)
- {
- tmplen *= 2;
- tmpbuf = __alloca (tmplen);
- }
- else
- tmpbuf = extend_alloca (tmpbuf, tmplen, tmplen * 2);
- }
- else
- {
- tmplen *= 2;
- char *newbuf = realloc (use_malloc ? tmpbuf : NULL, tmplen);
-
- if (newbuf == NULL)
- {
- status = NSS_STATUS_TRYAGAIN;
- goto done;
- }
- use_malloc = true;
- tmpbuf = newbuf;
- }
- }
-
- if (__builtin_expect (status != NSS_STATUS_NOTFOUND, 1))
- {
- if (__builtin_expect (status != NSS_STATUS_SUCCESS, 0))
- goto done;
-
- if (!in_blacklist (grpbuf.gr_name,
- strlen (grpbuf.gr_name), ent)
- && check_and_add_group (user, group, start, size,
- groupsp, limit, &grpbuf))
- {
- if (nss_setgrent != NULL)
- {
- nss_setgrent (1);
- ent->need_endgrent = true;
- }
- ent->skip_initgroups_dyn = true;
-
- goto iter;
- }
- }
- }
-
- status = NSS_STATUS_NOTFOUND;
-
- done:
- if (use_malloc)
- free (tmpbuf);
- }
-
- free (mygroups);
-
- return status;
- }
-
- free (mygroups);
- }
-
- /* If we come here, the NSS module does not support initgroups_dyn
- or we were confronted with a split group. In these cases we have
- to step through the whole list ourself. */
- iter:
- do
- {
- if ((status = nss_getgrent_r (&grpbuf, buffer, buflen, errnop)) !=
- NSS_STATUS_SUCCESS)
- break;
- }
- while (in_blacklist (grpbuf.gr_name, strlen (grpbuf.gr_name), ent));
-
- if (status == NSS_STATUS_SUCCESS)
- check_and_add_group (user, group, start, size, groupsp, limit, &grpbuf);
-
- return status;
-}
-
-static enum nss_status
-internal_getgrent_r (ent_t *ent, char *buffer, size_t buflen, const char *user,
- gid_t group, long int *start, long int *size,
- gid_t **groupsp, long int limit, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
- struct group grpbuf;
-
- if (!ent->files)
- return getgrent_next_nss (ent, buffer, buflen, user, group,
- start, size, groupsp, limit, errnop);
-
- while (1)
- {
- fpos_t pos;
- int parse_res = 0;
- char *p;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_grent (p, &grpbuf, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- if (grpbuf.gr_name[0] != '+' && grpbuf.gr_name[0] != '-')
- /* This is a real entry. */
- break;
-
- /* -group */
- if (grpbuf.gr_name[0] == '-' && grpbuf.gr_name[1] != '\0'
- && grpbuf.gr_name[1] != '@')
- {
- blacklist_store_name (&grpbuf.gr_name[1], ent);
- continue;
- }
-
- /* +group */
- if (grpbuf.gr_name[0] == '+' && grpbuf.gr_name[1] != '\0'
- && grpbuf.gr_name[1] != '@')
- {
- if (in_blacklist (&grpbuf.gr_name[1],
- strlen (&grpbuf.gr_name[1]), ent))
- continue;
- /* Store the group in the blacklist for the "+" at the end of
- /etc/group */
- blacklist_store_name (&grpbuf.gr_name[1], ent);
- if (nss_getgrnam_r == NULL)
- return NSS_STATUS_UNAVAIL;
- else if (nss_getgrnam_r (&grpbuf.gr_name[1], &grpbuf, buffer,
- buflen, errnop) != NSS_STATUS_SUCCESS)
- continue;
-
- check_and_add_group (user, group, start, size, groupsp,
- limit, &grpbuf);
-
- return NSS_STATUS_SUCCESS;
- }
-
- /* +:... */
- if (grpbuf.gr_name[0] == '+' && grpbuf.gr_name[1] == '\0')
- {
- /* If the selected module does not support getgrent_r or
- initgroups_dyn, abort. We cannot find the needed group
- entries. */
- if (nss_initgroups_dyn == NULL || nss_getgrgid_r == NULL)
- {
- if (nss_setgrent != NULL)
- {
- nss_setgrent (1);
- ent->need_endgrent = true;
- }
- ent->skip_initgroups_dyn = true;
-
- if (nss_getgrent_r == NULL)
- return NSS_STATUS_UNAVAIL;
- }
-
- ent->files = false;
-
- return getgrent_next_nss (ent, buffer, buflen, user, group,
- start, size, groupsp, limit, errnop);
- }
- }
-
- check_and_add_group (user, group, start, size, groupsp, limit, &grpbuf);
-
- return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_compat_initgroups_dyn (const char *user, gid_t group, long int *start,
- long int *size, gid_t **groupsp, long int limit,
- int *errnop)
-{
- enum nss_status status;
- ent_t intern = { true, false, false, NULL, {NULL, 0, 0} };
-
- status = internal_setgrent (&intern);
- if (status != NSS_STATUS_SUCCESS)
- return status;
-
- struct scratch_buffer tmpbuf;
- scratch_buffer_init (&tmpbuf);
-
- do
- {
- while ((status = internal_getgrent_r (&intern, tmpbuf.data, tmpbuf.length,
- user, group, start, size,
- groupsp, limit, errnop))
- == NSS_STATUS_TRYAGAIN && *errnop == ERANGE)
- if (!scratch_buffer_grow (&tmpbuf))
- goto done;
- }
- while (status == NSS_STATUS_SUCCESS);
-
- status = NSS_STATUS_SUCCESS;
-
- done:
- scratch_buffer_free (&tmpbuf);
-
- internal_endgrent (&intern);
-
- return status;
-}
-
-
-/* Support routines for remembering -@netgroup and -user entries.
- The names are stored in a single string with `|' as separator. */
-static void
-blacklist_store_name (const char *name, ent_t *ent)
-{
- int namelen = strlen (name);
- char *tmp;
-
- /* First call, setup cache. */
- if (ent->blacklist.size == 0)
- {
- ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
- ent->blacklist.data = malloc (ent->blacklist.size);
- if (ent->blacklist.data == NULL)
- return;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- ent->blacklist.current = 1;
- }
- else
- {
- if (in_blacklist (name, namelen, ent))
- return; /* no duplicates */
-
- if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
- {
- ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
- tmp = realloc (ent->blacklist.data, ent->blacklist.size);
- if (tmp == NULL)
- {
- free (ent->blacklist.data);
- ent->blacklist.size = 0;
- return;
- }
- ent->blacklist.data = tmp;
- }
- }
-
- tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
- *tmp++ = '|';
- *tmp = '\0';
- ent->blacklist.current += namelen + 1;
-
- return;
-}
-
-/* returns TRUE if ent->blacklist contains name, else FALSE */
-static bool_t
-in_blacklist (const char *name, int namelen, ent_t *ent)
-{
- char buf[namelen + 3];
- char *cp;
-
- if (ent->blacklist.data == NULL)
- return FALSE;
-
- buf[0] = '|';
- cp = stpcpy (&buf[1], name);
- *cp++ = '|';
- *cp = '\0';
- return strstr (ent->blacklist.data, buf) != NULL;
-}
Index: glibc-2.26/nis/nss_compat/compat-pwd.c
===================================================================
--- glibc-2.26.orig/nis/nss_compat/compat-pwd.c
+++ /dev/null
@@ -1,1132 +0,0 @@
-/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <nss.h>
-#include <nsswitch.h>
-#include <pwd.h>
-#include <stdio_ext.h>
-#include <string.h>
-#include <rpc/types.h>
-#include <rpcsvc/ypclnt.h>
-#include <libc-lock.h>
-#include <kernel-features.h>
-
-#include "netgroup.h"
-
-static service_user *ni;
-static enum nss_status (*nss_setpwent) (int stayopen);
-static enum nss_status (*nss_getpwnam_r) (const char *name,
- struct passwd * pwd, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_getpwuid_r) (uid_t uid, struct passwd * pwd,
- char *buffer, size_t buflen,
- int *errnop);
-static enum nss_status (*nss_getpwent_r) (struct passwd * pwd, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_endpwent) (void);
-
-/* Get the declaration of the parser function. */
-#define ENTNAME pwent
-#define STRUCTURE passwd
-#define EXTERN_PARSER
-#include <nss/nss_files/files-parse.c>
-
-/* Structure for remembering -@netgroup and -user members ... */
-#define BLACKLIST_INITIAL_SIZE 512
-#define BLACKLIST_INCREMENT 256
-struct blacklist_t
-{
- char *data;
- int current;
- int size;
-};
-
-struct ent_t
-{
- bool netgroup;
- bool first;
- bool files;
- enum nss_status setent_status;
- FILE *stream;
- struct blacklist_t blacklist;
- struct passwd pwd;
- struct __netgrent netgrdata;
-};
-typedef struct ent_t ent_t;
-
-static ent_t ext_ent = { false, false, true, NSS_STATUS_SUCCESS, NULL,
- { NULL, 0, 0 },
- { NULL, NULL, 0, 0, NULL, NULL, NULL }};
-
-/* Protect global state against multiple changers. */
-__libc_lock_define_initialized (static, lock)
-
-/* Prototypes for local functions. */
-static void blacklist_store_name (const char *, ent_t *);
-static int in_blacklist (const char *, int, ent_t *);
-
-/* Initialize the NSS interface/functions. The calling function must
- hold the lock. */
-static void
-init_nss_interface (void)
-{
- if (__nss_database_lookup ("passwd_compat", NULL, "nis", &ni) >= 0)
- {
- nss_setpwent = __nss_lookup_function (ni, "setpwent");
- nss_getpwnam_r = __nss_lookup_function (ni, "getpwnam_r");
- nss_getpwuid_r = __nss_lookup_function (ni, "getpwuid_r");
- nss_getpwent_r = __nss_lookup_function (ni, "getpwent_r");
- nss_endpwent = __nss_lookup_function (ni, "endpwent");
- }
-}
-
-static void
-give_pwd_free (struct passwd *pwd)
-{
- free (pwd->pw_name);
- free (pwd->pw_passwd);
- free (pwd->pw_gecos);
- free (pwd->pw_dir);
- free (pwd->pw_shell);
-
- memset (pwd, '\0', sizeof (struct passwd));
-}
-
-static size_t
-pwd_need_buflen (struct passwd *pwd)
-{
- size_t len = 0;
-
- if (pwd->pw_passwd != NULL)
- len += strlen (pwd->pw_passwd) + 1;
-
- if (pwd->pw_gecos != NULL)
- len += strlen (pwd->pw_gecos) + 1;
-
- if (pwd->pw_dir != NULL)
- len += strlen (pwd->pw_dir) + 1;
-
- if (pwd->pw_shell != NULL)
- len += strlen (pwd->pw_shell) + 1;
-
- return len;
-}
-
-static void
-copy_pwd_changes (struct passwd *dest, struct passwd *src,
- char *buffer, size_t buflen)
-{
- if (src->pw_passwd != NULL && strlen (src->pw_passwd))
- {
- if (buffer == NULL)
- dest->pw_passwd = strdup (src->pw_passwd);
- else if (dest->pw_passwd &&
- strlen (dest->pw_passwd) >= strlen (src->pw_passwd))
- strcpy (dest->pw_passwd, src->pw_passwd);
- else
- {
- dest->pw_passwd = buffer;
- strcpy (dest->pw_passwd, src->pw_passwd);
- buffer += strlen (dest->pw_passwd) + 1;
- buflen = buflen - (strlen (dest->pw_passwd) + 1);
- }
- }
-
- if (src->pw_gecos != NULL && strlen (src->pw_gecos))
- {
- if (buffer == NULL)
- dest->pw_gecos = strdup (src->pw_gecos);
- else if (dest->pw_gecos &&
- strlen (dest->pw_gecos) >= strlen (src->pw_gecos))
- strcpy (dest->pw_gecos, src->pw_gecos);
- else
- {
- dest->pw_gecos = buffer;
- strcpy (dest->pw_gecos, src->pw_gecos);
- buffer += strlen (dest->pw_gecos) + 1;
- buflen = buflen - (strlen (dest->pw_gecos) + 1);
- }
- }
- if (src->pw_dir != NULL && strlen (src->pw_dir))
- {
- if (buffer == NULL)
- dest->pw_dir = strdup (src->pw_dir);
- else if (dest->pw_dir && strlen (dest->pw_dir) >= strlen (src->pw_dir))
- strcpy (dest->pw_dir, src->pw_dir);
- else
- {
- dest->pw_dir = buffer;
- strcpy (dest->pw_dir, src->pw_dir);
- buffer += strlen (dest->pw_dir) + 1;
- buflen = buflen - (strlen (dest->pw_dir) + 1);
- }
- }
-
- if (src->pw_shell != NULL && strlen (src->pw_shell))
- {
- if (buffer == NULL)
- dest->pw_shell = strdup (src->pw_shell);
- else if (dest->pw_shell &&
- strlen (dest->pw_shell) >= strlen (src->pw_shell))
- strcpy (dest->pw_shell, src->pw_shell);
- else
- {
- dest->pw_shell = buffer;
- strcpy (dest->pw_shell, src->pw_shell);
- buffer += strlen (dest->pw_shell) + 1;
- buflen = buflen - (strlen (dest->pw_shell) + 1);
- }
- }
-}
-
-static enum nss_status
-internal_setpwent (ent_t *ent, int stayopen, int needent)
-{
- enum nss_status status = NSS_STATUS_SUCCESS;
-
- ent->first = ent->netgroup = false;
- ent->files = true;
- ent->setent_status = NSS_STATUS_SUCCESS;
-
- /* If something was left over free it. */
- if (ent->netgroup)
- __internal_endnetgrent (&ent->netgrdata);
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- if (ent->stream == NULL)
- {
- ent->stream = fopen ("/etc/passwd", "rme");
-
- if (ent->stream == NULL)
- status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
- else
- /* We take care of locking ourself. */
- __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
- }
- else
- rewind (ent->stream);
-
- give_pwd_free (&ent->pwd);
-
- if (needent && status == NSS_STATUS_SUCCESS && nss_setpwent)
- ent->setent_status = nss_setpwent (stayopen);
-
- return status;
-}
-
-
-enum nss_status
-_nss_compat_setpwent (int stayopen)
-{
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- result = internal_setpwent (&ext_ent, stayopen, 1);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-
-static enum nss_status
-internal_endpwent (ent_t *ent)
-{
- if (ent->stream != NULL)
- {
- fclose (ent->stream);
- ent->stream = NULL;
- }
-
- if (ent->netgroup)
- __internal_endnetgrent (&ent->netgrdata);
-
- ent->first = ent->netgroup = false;
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- give_pwd_free (&ent->pwd);
-
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_endpwent (void)
-{
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (nss_endpwent)
- nss_endpwent ();
-
- result = internal_endpwent (&ext_ent);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-
-static enum nss_status
-getpwent_next_nss_netgr (const char *name, struct passwd *result, ent_t *ent,
- char *group, char *buffer, size_t buflen,
- int *errnop)
-{
- char *curdomain = NULL, *host, *user, *domain, *p2;
- int status;
- size_t p2len;
-
- /* Leave function if NSS module does not support getpwnam_r,
- we need this function here. */
- if (!nss_getpwnam_r)
- return NSS_STATUS_UNAVAIL;
-
- if (ent->first)
- {
- memset (&ent->netgrdata, 0, sizeof (struct __netgrent));
- __internal_setnetgrent (group, &ent->netgrdata);
- ent->first = false;
- }
-
- while (1)
- {
- status = __internal_getnetgrent_r (&host, &user, &domain,
- &ent->netgrdata, buffer, buflen,
- errnop);
- if (status != 1)
- {
- __internal_endnetgrent (&ent->netgrdata);
- ent->netgroup = 0;
- give_pwd_free (&ent->pwd);
- return NSS_STATUS_RETURN;
- }
-
- if (user == NULL || user[0] == '-')
- continue;
-
- if (domain != NULL)
- {
- if (curdomain == NULL
- && yp_get_default_domain (&curdomain) != YPERR_SUCCESS)
- {
- __internal_endnetgrent (&ent->netgrdata);
- ent->netgroup = false;
- give_pwd_free (&ent->pwd);
- return NSS_STATUS_UNAVAIL;
- }
- if (strcmp (curdomain, domain) != 0)
- continue;
- }
-
- /* If name != NULL, we are called from getpwnam. */
- if (name != NULL)
- if (strcmp (user, name) != 0)
- continue;
-
- p2len = pwd_need_buflen (&ent->pwd);
- if (p2len > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- p2 = buffer + (buflen - p2len);
- buflen -= p2len;
-
- if (nss_getpwnam_r (user, result, buffer, buflen, errnop) !=
- NSS_STATUS_SUCCESS)
- continue;
-
- if (!in_blacklist (result->pw_name, strlen (result->pw_name), ent))
- {
- /* Store the User in the blacklist for possible the "+" at the
- end of /etc/passwd */
- blacklist_store_name (result->pw_name, ent);
- copy_pwd_changes (result, &ent->pwd, p2, p2len);
- break;
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-/* get the next user from NSS (+ entry) */
-static enum nss_status
-getpwent_next_nss (struct passwd *result, ent_t *ent, char *buffer,
- size_t buflen, int *errnop)
-{
- enum nss_status status;
- char *p2;
- size_t p2len;
-
- /* Return if NSS module does not support getpwent_r. */
- if (!nss_getpwent_r)
- return NSS_STATUS_UNAVAIL;
-
- /* If the setpwent call failed, say so. */
- if (ent->setent_status != NSS_STATUS_SUCCESS)
- return ent->setent_status;
-
- p2len = pwd_need_buflen (&ent->pwd);
- if (p2len > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- p2 = buffer + (buflen - p2len);
- buflen -= p2len;
-
- if (ent->first)
- ent->first = false;
-
- do
- {
- if ((status = nss_getpwent_r (result, buffer, buflen, errnop)) !=
- NSS_STATUS_SUCCESS)
- return status;
- }
- while (in_blacklist (result->pw_name, strlen (result->pw_name), ent));
-
- copy_pwd_changes (result, &ent->pwd, p2, p2len);
-
- return NSS_STATUS_SUCCESS;
-}
-
-/* This function handle the +user entrys in /etc/passwd */
-static enum nss_status
-getpwnam_plususer (const char *name, struct passwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- if (!nss_getpwnam_r)
- return NSS_STATUS_UNAVAIL;
-
- struct passwd pwd;
- memset (&pwd, '\0', sizeof (struct passwd));
-
- copy_pwd_changes (&pwd, result, NULL, 0);
-
- size_t plen = pwd_need_buflen (&pwd);
- if (plen > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- char *p = buffer + (buflen - plen);
- buflen -= plen;
-
- enum nss_status status = nss_getpwnam_r (name, result, buffer, buflen,
- errnop);
- if (status != NSS_STATUS_SUCCESS)
- return status;
-
- if (in_blacklist (result->pw_name, strlen (result->pw_name), ent))
- return NSS_STATUS_NOTFOUND;
-
- copy_pwd_changes (result, &pwd, p, plen);
- give_pwd_free (&pwd);
- /* We found the entry. */
- return NSS_STATUS_SUCCESS;
-}
-
-static enum nss_status
-getpwent_next_file (struct passwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
- while (1)
- {
- fpos_t pos;
- char *p;
- int parse_res;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
- /* This is a real entry. */
- break;
-
- /* -@netgroup */
- if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
- && result->pw_name[2] != '\0')
- {
- /* XXX Do not use fixed length buffer. */
- char buf2[1024];
- char *user, *host, *domain;
- struct __netgrent netgrdata;
-
- memset (&netgrdata, 0, sizeof (struct __netgrent));
- __internal_setnetgrent (&result->pw_name[2], &netgrdata);
- while (__internal_getnetgrent_r (&host, &user, &domain, &netgrdata,
- buf2, sizeof (buf2), errnop))
- {
- if (user != NULL && user[0] != '-')
- blacklist_store_name (user, ent);
- }
- __internal_endnetgrent (&netgrdata);
- continue;
- }
-
- /* +@netgroup */
- if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
- && result->pw_name[2] != '\0')
- {
- enum nss_status status;
-
- ent->netgroup = true;
- ent->first = true;
- copy_pwd_changes (&ent->pwd, result, NULL, 0);
-
- status = getpwent_next_nss_netgr (NULL, result, ent,
- &result->pw_name[2],
- buffer, buflen, errnop);
- if (status == NSS_STATUS_RETURN)
- continue;
- else
- return status;
- }
-
- /* -user */
- if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
- && result->pw_name[1] != '@')
- {
- blacklist_store_name (&result->pw_name[1], ent);
- continue;
- }
-
- /* +user */
- if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
- && result->pw_name[1] != '@')
- {
- size_t len = strlen (result->pw_name);
- char buf[len];
- enum nss_status status;
-
- /* Store the User in the blacklist for the "+" at the end of
- /etc/passwd */
- memcpy (buf, &result->pw_name[1], len);
- status = getpwnam_plususer (&result->pw_name[1], result, ent,
- buffer, buflen, errnop);
- blacklist_store_name (buf, ent);
-
- if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
- break;
- else if (status == NSS_STATUS_RETURN /* We couldn't parse the entry */
- || status == NSS_STATUS_NOTFOUND) /* entry doesn't exist */
- continue;
- else
- {
- if (status == NSS_STATUS_TRYAGAIN)
- {
- /* The parser ran out of space */
- fsetpos (ent->stream, &pos);
- *errnop = ERANGE;
- }
- return status;
- }
- }
-
- /* +:... */
- if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
- {
- ent->files = false;
- ent->first = true;
- copy_pwd_changes (&ent->pwd, result, NULL, 0);
-
- return getpwent_next_nss (result, ent, buffer, buflen, errnop);
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-
-static enum nss_status
-internal_getpwent_r (struct passwd *pw, ent_t *ent, char *buffer,
- size_t buflen, int *errnop)
-{
- if (ent->netgroup)
- {
- enum nss_status status;
-
- /* We are searching members in a netgroup */
- /* Since this is not the first call, we don't need the group name */
- status = getpwent_next_nss_netgr (NULL, pw, ent, NULL, buffer, buflen,
- errnop);
- if (status == NSS_STATUS_RETURN)
- return getpwent_next_file (pw, ent, buffer, buflen, errnop);
- else
- return status;
- }
- else if (ent->files)
- return getpwent_next_file (pw, ent, buffer, buflen, errnop);
- else
- return getpwent_next_nss (pw, ent, buffer, buflen, errnop);
-
-}
-
-enum nss_status
-_nss_compat_getpwent_r (struct passwd *pwd, char *buffer, size_t buflen,
- int *errnop)
-{
- enum nss_status result = NSS_STATUS_SUCCESS;
-
- __libc_lock_lock (lock);
-
- /* Be prepared that the setpwent function was not called before. */
- if (ni == NULL)
- init_nss_interface ();
-
- if (ext_ent.stream == NULL)
- result = internal_setpwent (&ext_ent, 1, 1);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getpwent_r (pwd, &ext_ent, buffer, buflen, errnop);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
-static enum nss_status
-internal_getpwnam_r (const char *name, struct passwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
-
- while (1)
- {
- fpos_t pos;
- char *p;
- int parse_res;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- {
- return NSS_STATUS_NOTFOUND;
- }
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- /* This is a real entry. */
- if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
- {
- if (strcmp (result->pw_name, name) == 0)
- return NSS_STATUS_SUCCESS;
- else
- continue;
- }
-
- /* -@netgroup */
- if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
- && result->pw_name[2] != '\0')
- {
- if (innetgr (&result->pw_name[2], NULL, name, NULL))
- return NSS_STATUS_NOTFOUND;
- continue;
- }
-
- /* +@netgroup */
- if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
- && result->pw_name[2] != '\0')
- {
- enum nss_status status;
-
- if (innetgr (&result->pw_name[2], NULL, name, NULL))
- {
- status = getpwnam_plususer (name, result, ent, buffer,
- buflen, errnop);
-
- if (status == NSS_STATUS_RETURN)
- continue;
-
- return status;
- }
- continue;
- }
-
- /* -user */
- if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
- && result->pw_name[1] != '@')
- {
- if (strcmp (&result->pw_name[1], name) == 0)
- return NSS_STATUS_NOTFOUND;
- else
- continue;
- }
-
- /* +user */
- if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
- && result->pw_name[1] != '@')
- {
- if (strcmp (name, &result->pw_name[1]) == 0)
- {
- enum nss_status status;
-
- status = getpwnam_plususer (name, result, ent, buffer, buflen,
- errnop);
- if (status == NSS_STATUS_RETURN)
- /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
- }
- }
-
- /* +:... */
- if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
- {
- enum nss_status status;
-
- status = getpwnam_plususer (name, result, ent,
- buffer, buflen, errnop);
- if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
- break;
- else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
- }
- }
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_getpwnam_r (const char *name, struct passwd *pwd,
- char *buffer, size_t buflen, int *errnop)
-{
- enum nss_status result;
- ent_t ent = { false, false, true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 },
- { NULL, NULL, 0, 0, NULL, NULL, NULL }};
-
- if (name[0] == '-' || name[0] == '+')
- return NSS_STATUS_NOTFOUND;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- __libc_lock_unlock (lock);
-
- result = internal_setpwent (&ent, 0, 0);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getpwnam_r (name, pwd, &ent, buffer, buflen, errnop);
-
- internal_endpwent (&ent);
-
- return result;
-}
-
-/* This function handle the + entry in /etc/passwd for getpwuid */
-static enum nss_status
-getpwuid_plususer (uid_t uid, struct passwd *result, char *buffer,
- size_t buflen, int *errnop)
-{
- struct passwd pwd;
- char *p;
- size_t plen;
-
- if (!nss_getpwuid_r)
- return NSS_STATUS_UNAVAIL;
-
- memset (&pwd, '\0', sizeof (struct passwd));
-
- copy_pwd_changes (&pwd, result, NULL, 0);
-
- plen = pwd_need_buflen (&pwd);
- if (plen > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- p = buffer + (buflen - plen);
- buflen -= plen;
-
- if (nss_getpwuid_r (uid, result, buffer, buflen, errnop) ==
- NSS_STATUS_SUCCESS)
- {
- copy_pwd_changes (result, &pwd, p, plen);
- give_pwd_free (&pwd);
- /* We found the entry. */
- return NSS_STATUS_SUCCESS;
- }
- else
- {
- /* Give buffer the old len back */
- buflen += plen;
- give_pwd_free (&pwd);
- }
- return NSS_STATUS_RETURN;
-}
-
-/* Searches in /etc/passwd and the NSS subsystem for a special user id */
-static enum nss_status
-internal_getpwuid_r (uid_t uid, struct passwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
-
- while (1)
- {
- fpos_t pos;
- char *p;
- int parse_res;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- /* This is a real entry. */
- if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
- {
- if (result->pw_uid == uid)
- return NSS_STATUS_SUCCESS;
- else
- continue;
- }
-
- /* -@netgroup */
- if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
- && result->pw_name[2] != '\0')
- {
- /* -1, because we remove first two character of pw_name. */
- size_t len = strlen (result->pw_name) - 1;
- char buf[len];
- enum nss_status status;
-
- memcpy (buf, &result->pw_name[2], len);
-
- status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
- if (status == NSS_STATUS_SUCCESS &&
- innetgr (buf, NULL, result->pw_name, NULL))
- return NSS_STATUS_NOTFOUND;
-
- continue;
- }
-
- /* +@netgroup */
- if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
- && result->pw_name[2] != '\0')
- {
- /* -1, because we remove first two characters of pw_name. */
- size_t len = strlen (result->pw_name) - 1;
- char buf[len];
- enum nss_status status;
-
- memcpy (buf, &result->pw_name[2], len);
-
- status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
-
- if (status == NSS_STATUS_RETURN)
- continue;
-
- if (status == NSS_STATUS_SUCCESS)
- {
- if (innetgr (buf, NULL, result->pw_name, NULL))
- return NSS_STATUS_SUCCESS;
- }
- else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
-
- continue;
- }
-
- /* -user */
- if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
- && result->pw_name[1] != '@')
- {
- size_t len = strlen (result->pw_name);
- char buf[len];
- enum nss_status status;
-
- memcpy (buf, &result->pw_name[1], len);
-
- status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
- if (status == NSS_STATUS_SUCCESS &&
- innetgr (buf, NULL, result->pw_name, NULL))
- return NSS_STATUS_NOTFOUND;
- continue;
- }
-
- /* +user */
- if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
- && result->pw_name[1] != '@')
- {
- size_t len = strlen (result->pw_name);
- char buf[len];
- enum nss_status status;
-
- memcpy (buf, &result->pw_name[1], len);
-
- status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
-
- if (status == NSS_STATUS_RETURN)
- continue;
-
- if (status == NSS_STATUS_SUCCESS)
- {
- if (strcmp (buf, result->pw_name) == 0)
- return NSS_STATUS_SUCCESS;
- }
- else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
-
- continue;
- }
-
- /* +:... */
- if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
- {
- enum nss_status status;
-
- status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
- if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
- break;
- else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
- }
- }
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_getpwuid_r (uid_t uid, struct passwd *pwd,
- char *buffer, size_t buflen, int *errnop)
-{
- enum nss_status result;
- ent_t ent = { false, false, true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 },
- { NULL, NULL, 0, 0, NULL, NULL, NULL }};
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- __libc_lock_unlock (lock);
-
- result = internal_setpwent (&ent, 0, 0);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getpwuid_r (uid, pwd, &ent, buffer, buflen, errnop);
-
- internal_endpwent (&ent);
-
- return result;
-}
-
-
-/* Support routines for remembering -@netgroup and -user entries.
- The names are stored in a single string with `|' as separator. */
-static void
-blacklist_store_name (const char *name, ent_t *ent)
-{
- int namelen = strlen (name);
- char *tmp;
-
- /* first call, setup cache */
- if (ent->blacklist.size == 0)
- {
- ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
- ent->blacklist.data = malloc (ent->blacklist.size);
- if (ent->blacklist.data == NULL)
- return;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- ent->blacklist.current = 1;
- }
- else
- {
- if (in_blacklist (name, namelen, ent))
- return; /* no duplicates */
-
- if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
- {
- ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
- tmp = realloc (ent->blacklist.data, ent->blacklist.size);
- if (tmp == NULL)
- {
- free (ent->blacklist.data);
- ent->blacklist.size = 0;
- return;
- }
- ent->blacklist.data = tmp;
- }
- }
-
- tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
- *tmp++ = '|';
- *tmp = '\0';
- ent->blacklist.current += namelen + 1;
-
- return;
-}
-
-/* Returns TRUE if ent->blacklist contains name, else FALSE. */
-static bool_t
-in_blacklist (const char *name, int namelen, ent_t *ent)
-{
- char buf[namelen + 3];
- char *cp;
-
- if (ent->blacklist.data == NULL)
- return FALSE;
-
- buf[0] = '|';
- cp = stpcpy (&buf[1], name);
- *cp++ = '|';
- *cp = '\0';
- return strstr (ent->blacklist.data, buf) != NULL;
-}
Index: glibc-2.26/nis/nss_compat/compat-spwd.c
===================================================================
--- glibc-2.26.orig/nis/nss_compat/compat-spwd.c
+++ /dev/null
@@ -1,858 +0,0 @@
-/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <nss.h>
-#include <nsswitch.h>
-#include <shadow.h>
-#include <stdio_ext.h>
-#include <string.h>
-#include <rpc/types.h>
-#include <rpcsvc/ypclnt.h>
-#include <libc-lock.h>
-#include <kernel-features.h>
-
-#include "netgroup.h"
-
-static service_user *ni;
-static enum nss_status (*nss_setspent) (int stayopen);
-static enum nss_status (*nss_getspnam_r) (const char *name, struct spwd * sp,
- char *buffer, size_t buflen,
- int *errnop);
-static enum nss_status (*nss_getspent_r) (struct spwd * sp, char *buffer,
- size_t buflen, int *errnop);
-static enum nss_status (*nss_endspent) (void);
-
-/* Get the declaration of the parser function. */
-#define ENTNAME spent
-#define STRUCTURE spwd
-#define EXTERN_PARSER
-#include <nss/nss_files/files-parse.c>
-
-/* Structure for remembering -@netgroup and -user members ... */
-#define BLACKLIST_INITIAL_SIZE 512
-#define BLACKLIST_INCREMENT 256
-struct blacklist_t
-{
- char *data;
- int current;
- int size;
-};
-
-struct ent_t
-{
- bool netgroup;
- bool files;
- bool first;
- enum nss_status setent_status;
- FILE *stream;
- struct blacklist_t blacklist;
- struct spwd pwd;
- struct __netgrent netgrdata;
-};
-typedef struct ent_t ent_t;
-
-static ent_t ext_ent = { false, true, false, NSS_STATUS_SUCCESS, NULL,
- { NULL, 0, 0},
- { NULL, NULL, 0, 0, 0, 0, 0, 0, 0}};
-
-/* Protect global state against multiple changers. */
-__libc_lock_define_initialized (static, lock)
-
-/* Prototypes for local functions. */
-static void blacklist_store_name (const char *, ent_t *);
-static int in_blacklist (const char *, int, ent_t *);
-
-/* Initialize the NSS interface/functions. The calling function must
- hold the lock. */
-static void
-init_nss_interface (void)
-{
- if (__nss_database_lookup ("shadow_compat", "passwd_compat",
- "nis", &ni) >= 0)
- {
- nss_setspent = __nss_lookup_function (ni, "setspent");
- nss_getspnam_r = __nss_lookup_function (ni, "getspnam_r");
- nss_getspent_r = __nss_lookup_function (ni, "getspent_r");
- nss_endspent = __nss_lookup_function (ni, "endspent");
- }
-}
-
-static void
-give_spwd_free (struct spwd *pwd)
-{
- free (pwd->sp_namp);
- free (pwd->sp_pwdp);
-
- memset (pwd, '\0', sizeof (struct spwd));
- pwd->sp_warn = -1;
- pwd->sp_inact = -1;
- pwd->sp_expire = -1;
- pwd->sp_flag = ~0ul;
-}
-
-static int
-spwd_need_buflen (struct spwd *pwd)
-{
- int len = 0;
-
- if (pwd->sp_pwdp != NULL)
- len += strlen (pwd->sp_pwdp) + 1;
-
- return len;
-}
-
-static void
-copy_spwd_changes (struct spwd *dest, struct spwd *src,
- char *buffer, size_t buflen)
-{
- if (src->sp_pwdp != NULL && strlen (src->sp_pwdp))
- {
- if (buffer == NULL)
- dest->sp_pwdp = strdup (src->sp_pwdp);
- else if (dest->sp_pwdp &&
- strlen (dest->sp_pwdp) >= strlen (src->sp_pwdp))
- strcpy (dest->sp_pwdp, src->sp_pwdp);
- else
- {
- dest->sp_pwdp = buffer;
- strcpy (dest->sp_pwdp, src->sp_pwdp);
- buffer += strlen (dest->sp_pwdp) + 1;
- buflen = buflen - (strlen (dest->sp_pwdp) + 1);
- }
- }
- if (src->sp_lstchg != 0)
- dest->sp_lstchg = src->sp_lstchg;
- if (src->sp_min != 0)
- dest->sp_min = src->sp_min;
- if (src->sp_max != 0)
- dest->sp_max = src->sp_max;
- if (src->sp_warn != -1)
- dest->sp_warn = src->sp_warn;
- if (src->sp_inact != -1)
- dest->sp_inact = src->sp_inact;
- if (src->sp_expire != -1)
- dest->sp_expire = src->sp_expire;
- if (src->sp_flag != ~0ul)
- dest->sp_flag = src->sp_flag;
-}
-
-static enum nss_status
-internal_setspent (ent_t *ent, int stayopen, int needent)
-{
- enum nss_status status = NSS_STATUS_SUCCESS;
-
- ent->first = ent->netgroup = 0;
- ent->files = true;
-
- /* If something was left over free it. */
- if (ent->netgroup)
- __internal_endnetgrent (&ent->netgrdata);
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- if (ent->stream == NULL)
- {
- ent->stream = fopen ("/etc/shadow", "rme");
-
- if (ent->stream == NULL)
- status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
- else
- /* We take care of locking ourself. */
- __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
- }
- else
- rewind (ent->stream);
-
- give_spwd_free (&ent->pwd);
-
- if (needent && status == NSS_STATUS_SUCCESS && nss_setspent)
- ent->setent_status = nss_setspent (stayopen);
-
- return status;
-}
-
-
-enum nss_status
-_nss_compat_setspent (int stayopen)
-{
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- result = internal_setspent (&ext_ent, stayopen, 1);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-
-static enum nss_status
-internal_endspent (ent_t *ent)
-{
- if (ent->stream != NULL)
- {
- fclose (ent->stream);
- ent->stream = NULL;
- }
-
- if (ent->netgroup)
- __internal_endnetgrent (&ent->netgrdata);
-
- ent->first = ent->netgroup = false;
- ent->files = true;
-
- if (ent->blacklist.data != NULL)
- {
- ent->blacklist.current = 1;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- }
- else
- ent->blacklist.current = 0;
-
- give_spwd_free (&ent->pwd);
-
- return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_compat_endspent (void)
-{
- enum nss_status result;
-
- __libc_lock_lock (lock);
-
- if (nss_endspent)
- nss_endspent ();
-
- result = internal_endspent (&ext_ent);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-
-static enum nss_status
-getspent_next_nss_netgr (const char *name, struct spwd *result, ent_t *ent,
- char *group, char *buffer, size_t buflen,
- int *errnop)
-{
- char *curdomain = NULL, *host, *user, *domain, *p2;
- size_t p2len;
-
- if (!nss_getspnam_r)
- return NSS_STATUS_UNAVAIL;
-
- /* If the setpwent call failed, say so. */
- if (ent->setent_status != NSS_STATUS_SUCCESS)
- return ent->setent_status;
-
- if (ent->first)
- {
- memset (&ent->netgrdata, 0, sizeof (struct __netgrent));
- __internal_setnetgrent (group, &ent->netgrdata);
- ent->first = false;
- }
-
- while (1)
- {
- enum nss_status status;
-
- status = __internal_getnetgrent_r (&host, &user, &domain,
- &ent->netgrdata, buffer, buflen,
- errnop);
- if (status != 1)
- {
- __internal_endnetgrent (&ent->netgrdata);
- ent->netgroup = false;
- give_spwd_free (&ent->pwd);
- return NSS_STATUS_RETURN;
- }
-
- if (user == NULL || user[0] == '-')
- continue;
-
- if (domain != NULL)
- {
- if (curdomain == NULL
- && yp_get_default_domain (&curdomain) != YPERR_SUCCESS)
- {
- __internal_endnetgrent (&ent->netgrdata);
- ent->netgroup = false;
- give_spwd_free (&ent->pwd);
- return NSS_STATUS_UNAVAIL;
- }
- if (strcmp (curdomain, domain) != 0)
- continue;
- }
-
- /* If name != NULL, we are called from getpwnam */
- if (name != NULL)
- if (strcmp (user, name) != 0)
- continue;
-
- p2len = spwd_need_buflen (&ent->pwd);
- if (p2len > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- p2 = buffer + (buflen - p2len);
- buflen -= p2len;
-
- if (nss_getspnam_r (user, result, buffer, buflen, errnop) !=
- NSS_STATUS_SUCCESS)
- continue;
-
- if (!in_blacklist (result->sp_namp, strlen (result->sp_namp), ent))
- {
- /* Store the User in the blacklist for possible the "+" at the
- end of /etc/passwd */
- blacklist_store_name (result->sp_namp, ent);
- copy_spwd_changes (result, &ent->pwd, p2, p2len);
- break;
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-
-static enum nss_status
-getspent_next_nss (struct spwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- enum nss_status status;
- char *p2;
- size_t p2len;
-
- if (!nss_getspent_r)
- return NSS_STATUS_UNAVAIL;
-
- p2len = spwd_need_buflen (&ent->pwd);
- if (p2len > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- p2 = buffer + (buflen - p2len);
- buflen -= p2len;
- do
- {
- if ((status = nss_getspent_r (result, buffer, buflen, errnop)) !=
- NSS_STATUS_SUCCESS)
- return status;
- }
- while (in_blacklist (result->sp_namp, strlen (result->sp_namp), ent));
-
- copy_spwd_changes (result, &ent->pwd, p2, p2len);
-
- return NSS_STATUS_SUCCESS;
-}
-
-
-/* This function handle the +user entrys in /etc/shadow */
-static enum nss_status
-getspnam_plususer (const char *name, struct spwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- if (!nss_getspnam_r)
- return NSS_STATUS_UNAVAIL;
-
- struct spwd pwd;
- memset (&pwd, '\0', sizeof (struct spwd));
- pwd.sp_warn = -1;
- pwd.sp_inact = -1;
- pwd.sp_expire = -1;
- pwd.sp_flag = ~0ul;
-
- copy_spwd_changes (&pwd, result, NULL, 0);
-
- size_t plen = spwd_need_buflen (&pwd);
- if (plen > buflen)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
- char *p = buffer + (buflen - plen);
- buflen -= plen;
-
- enum nss_status status = nss_getspnam_r (name, result, buffer, buflen,
- errnop);
- if (status != NSS_STATUS_SUCCESS)
- return status;
-
- if (in_blacklist (result->sp_namp, strlen (result->sp_namp), ent))
- return NSS_STATUS_NOTFOUND;
-
- copy_spwd_changes (result, &pwd, p, plen);
- give_spwd_free (&pwd);
- /* We found the entry. */
- return NSS_STATUS_SUCCESS;
-}
-
-
-static enum nss_status
-getspent_next_file (struct spwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
- while (1)
- {
- fpos_t pos;
- int parse_res = 0;
- char *p;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- || !(parse_res = _nss_files_parse_spent (p, result, data,
- buflen, errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-')
- /* This is a real entry. */
- break;
-
- /* -@netgroup */
- if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@'
- && result->sp_namp[2] != '\0')
- {
- /* XXX Do not use fixed length buffers. */
- char buf2[1024];
- char *user, *host, *domain;
- struct __netgrent netgrdata;
-
- memset (&netgrdata, 0, sizeof (struct __netgrent));
- __internal_setnetgrent (&result->sp_namp[2], &netgrdata);
- while (__internal_getnetgrent_r (&host, &user, &domain,
- &netgrdata, buf2, sizeof (buf2),
- errnop))
- {
- if (user != NULL && user[0] != '-')
- blacklist_store_name (user, ent);
- }
- __internal_endnetgrent (&netgrdata);
- continue;
- }
-
- /* +@netgroup */
- if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@'
- && result->sp_namp[2] != '\0')
- {
- int status;
-
- ent->netgroup = true;
- ent->first = true;
- copy_spwd_changes (&ent->pwd, result, NULL, 0);
-
- status = getspent_next_nss_netgr (NULL, result, ent,
- &result->sp_namp[2],
- buffer, buflen, errnop);
- if (status == NSS_STATUS_RETURN)
- continue;
- else
- return status;
- }
-
- /* -user */
- if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0'
- && result->sp_namp[1] != '@')
- {
- blacklist_store_name (&result->sp_namp[1], ent);
- continue;
- }
-
- /* +user */
- if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0'
- && result->sp_namp[1] != '@')
- {
- size_t len = strlen (result->sp_namp);
- char buf[len];
- enum nss_status status;
-
- /* Store the User in the blacklist for the "+" at the end of
- /etc/passwd */
- memcpy (buf, &result->sp_namp[1], len);
- status = getspnam_plususer (&result->sp_namp[1], result, ent,
- buffer, buflen, errnop);
- blacklist_store_name (buf, ent);
-
- if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
- break;
- /* We couldn't parse the entry */
- else if (status == NSS_STATUS_RETURN
- /* entry doesn't exist */
- || status == NSS_STATUS_NOTFOUND)
- continue;
- else
- {
- if (status == NSS_STATUS_TRYAGAIN)
- {
- fsetpos (ent->stream, &pos);
- *errnop = ERANGE;
- }
- return status;
- }
- }
-
- /* +:... */
- if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0')
- {
- ent->files = false;
- ent->first = true;
- copy_spwd_changes (&ent->pwd, result, NULL, 0);
-
- return getspent_next_nss (result, ent, buffer, buflen, errnop);
- }
- }
-
- return NSS_STATUS_SUCCESS;
-}
-
-
-static enum nss_status
-internal_getspent_r (struct spwd *pw, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- if (ent->netgroup)
- {
- enum nss_status status;
-
- /* We are searching members in a netgroup */
- /* Since this is not the first call, we don't need the group name */
- status = getspent_next_nss_netgr (NULL, pw, ent, NULL, buffer,
- buflen, errnop);
-
- if (status == NSS_STATUS_RETURN)
- return getspent_next_file (pw, ent, buffer, buflen, errnop);
- else
- return status;
- }
- else if (ent->files)
- return getspent_next_file (pw, ent, buffer, buflen, errnop);
- else
- return getspent_next_nss (pw, ent, buffer, buflen, errnop);
-}
-
-
-enum nss_status
-_nss_compat_getspent_r (struct spwd *pwd, char *buffer, size_t buflen,
- int *errnop)
-{
- enum nss_status result = NSS_STATUS_SUCCESS;
-
- __libc_lock_lock (lock);
-
- /* Be prepared that the setpwent function was not called before. */
- if (ni == NULL)
- init_nss_interface ();
-
- if (ext_ent.stream == NULL)
- result = internal_setspent (&ext_ent, 1, 1);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getspent_r (pwd, &ext_ent, buffer, buflen, errnop);
-
- __libc_lock_unlock (lock);
-
- return result;
-}
-
-
-/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
-static enum nss_status
-internal_getspnam_r (const char *name, struct spwd *result, ent_t *ent,
- char *buffer, size_t buflen, int *errnop)
-{
- struct parser_data *data = (void *) buffer;
-
- while (1)
- {
- fpos_t pos;
- char *p;
- int parse_res;
-
- do
- {
- /* We need at least 3 characters for one line. */
- if (__glibc_unlikely (buflen < 3))
- {
- erange:
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
- }
-
- fgetpos (ent->stream, &pos);
- buffer[buflen - 1] = '\xff';
- p = fgets_unlocked (buffer, buflen, ent->stream);
- if (p == NULL && feof_unlocked (ent->stream))
- return NSS_STATUS_NOTFOUND;
-
- if (p == NULL || buffer[buflen - 1] != '\xff')
- {
- erange_reset:
- fsetpos (ent->stream, &pos);
- goto erange;
- }
-
- /* Terminate the line for any case. */
- buffer[buflen - 1] = '\0';
-
- /* Skip leading blanks. */
- while (isspace (*p))
- ++p;
- }
- while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
- /* Parse the line. If it is invalid, loop to
- get the next line of the file to parse. */
- !(parse_res = _nss_files_parse_spent (p, result, data, buflen,
- errnop)));
-
- if (__glibc_unlikely (parse_res == -1))
- /* The parser ran out of space. */
- goto erange_reset;
-
- /* This is a real entry. */
- if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-')
- {
- if (strcmp (result->sp_namp, name) == 0)
- return NSS_STATUS_SUCCESS;
- else
- continue;
- }
-
- /* -@netgroup */
- /* If the loaded NSS module does not support this service, add
- all users from a +@netgroup entry to the blacklist, too. */
- if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@'
- && result->sp_namp[2] != '\0')
- {
- if (innetgr (&result->sp_namp[2], NULL, name, NULL))
- return NSS_STATUS_NOTFOUND;
- continue;
- }
-
- /* +@netgroup */
- if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@'
- && result->sp_namp[2] != '\0')
- {
- enum nss_status status;
-
- if (innetgr (&result->sp_namp[2], NULL, name, NULL))
- {
- status = getspnam_plususer (name, result, ent, buffer,
- buflen, errnop);
-
- if (status == NSS_STATUS_RETURN)
- continue;
-
- return status;
- }
- continue;
- }
-
- /* -user */
- if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0'
- && result->sp_namp[1] != '@')
- {
- if (strcmp (&result->sp_namp[1], name) == 0)
- return NSS_STATUS_NOTFOUND;
- else
- continue;
- }
-
- /* +user */
- if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0'
- && result->sp_namp[1] != '@')
- {
- if (strcmp (name, &result->sp_namp[1]) == 0)
- {
- enum nss_status status;
-
- status = getspnam_plususer (name, result, ent,
- buffer, buflen, errnop);
-
- if (status == NSS_STATUS_RETURN)
- /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
- }
- }
-
- /* +:... */
- if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0')
- {
- enum nss_status status;
-
- status = getspnam_plususer (name, result, ent,
- buffer, buflen, errnop);
-
- if (status == NSS_STATUS_SUCCESS)
- /* We found the entry. */
- break;
- else if (status == NSS_STATUS_RETURN)
- /* We couldn't parse the entry */
- return NSS_STATUS_NOTFOUND;
- else
- return status;
- }
- }
- return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_compat_getspnam_r (const char *name, struct spwd *pwd,
- char *buffer, size_t buflen, int *errnop)
-{
- enum nss_status result;
- ent_t ent = { false, true, false, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0},
- { NULL, NULL, 0, 0, 0, 0, 0, 0, 0}};
-
- if (name[0] == '-' || name[0] == '+')
- return NSS_STATUS_NOTFOUND;
-
- __libc_lock_lock (lock);
-
- if (ni == NULL)
- init_nss_interface ();
-
- __libc_lock_unlock (lock);
-
- result = internal_setspent (&ent, 0, 0);
-
- if (result == NSS_STATUS_SUCCESS)
- result = internal_getspnam_r (name, pwd, &ent, buffer, buflen, errnop);
-
- internal_endspent (&ent);
-
- return result;
-}
-
-
-/* Support routines for remembering -@netgroup and -user entries.
- The names are stored in a single string with `|' as separator. */
-static void
-blacklist_store_name (const char *name, ent_t *ent)
-{
- int namelen = strlen (name);
- char *tmp;
-
- /* first call, setup cache */
- if (ent->blacklist.size == 0)
- {
- ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
- ent->blacklist.data = malloc (ent->blacklist.size);
- if (ent->blacklist.data == NULL)
- return;
- ent->blacklist.data[0] = '|';
- ent->blacklist.data[1] = '\0';
- ent->blacklist.current = 1;
- }
- else
- {
- if (in_blacklist (name, namelen, ent))
- return; /* no duplicates */
-
- if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
- {
- ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
- tmp = realloc (ent->blacklist.data, ent->blacklist.size);
- if (tmp == NULL)
- {
- free (ent->blacklist.data);
- ent->blacklist.size = 0;
- return;
- }
- ent->blacklist.data = tmp;
- }
- }
-
- tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
- *tmp++ = '|';
- *tmp = '\0';
- ent->blacklist.current += namelen + 1;
-
- return;
-}
-
-
-/* Returns TRUE if ent->blacklist contains name, else FALSE. */
-static bool_t
-in_blacklist (const char *name, int namelen, ent_t *ent)
-{
- char buf[namelen + 3];
- char *cp;
-
- if (ent->blacklist.data == NULL)
- return false;
-
- buf[0] = '|';
- cp = stpcpy (&buf[1], name);
- *cp++ = '|';
- *cp = '\0';
- return strstr (ent->blacklist.data, buf) != NULL;
-}
Index: glibc-2.26/nss/Makefile
===================================================================
--- glibc-2.26.orig/nss/Makefile
+++ glibc-2.26/nss/Makefile
@@ -70,7 +70,7 @@ tests += tst-cancel-getpwuid_r
endif
# Specify rules for the nss_* modules. We have some services.
-services := files db
+services := files db compat
extra-libs = $(services:%=libnss_%)
# These libraries will be built in the `others' pass rather than
@@ -93,11 +93,15 @@ libnss_db-routines := $(libnss_db-dbs) d
generated += $(filter-out db-alias.c db-netgrp.c, \
$(addsuffix .c,$(libnss_db-dbs)))
+libnss_compat-routines := $(addprefix compat-,grp pwd spwd initgroups) \
+ nisdomain
+
install-others += $(inst_vardbdir)/Makefile
# Build static module into libc if requested
libnss_files-inhibit-o = $(filter-out .os,$(object-suffixes))
libnss_db-inhibit-o = $(filter-out .os,$(object-suffixes))
+libnss_compat-inhibit-o = $(filter-out .os,$(object-suffixes))
ifeq ($(build-static-nss),yes)
routines += $(libnss_files-routines)
static-only-routines += $(libnss_files-routines)
Index: glibc-2.26/nss/Versions
===================================================================
--- glibc-2.26.orig/nss/Versions
+++ glibc-2.26/nss/Versions
@@ -160,3 +160,14 @@ libnss_db {
_nss_db_init;
}
}
+
+libnss_compat {
+ GLIBC_PRIVATE {
+ _nss_compat_endgrent; _nss_compat_endpwent; _nss_compat_endspent;
+ _nss_compat_getgrent_r; _nss_compat_getgrgid_r; _nss_compat_getgrnam_r;
+ _nss_compat_getpwent_r; _nss_compat_getpwnam_r; _nss_compat_getpwuid_r;
+ _nss_compat_getspent_r; _nss_compat_getspnam_r;
+ _nss_compat_setgrent; _nss_compat_setpwent; _nss_compat_setspent;
+ _nss_compat_initgroups_dyn;
+ }
+}
Index: glibc-2.26/nss/nss_compat/compat-grp.c
===================================================================
--- /dev/null
+++ glibc-2.26/nss/nss_compat/compat-grp.c
@@ -0,0 +1,682 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <nss.h>
+#include <nsswitch.h>
+#include <stdio_ext.h>
+#include <string.h>
+#include <libc-lock.h>
+#include <kernel-features.h>
+
+static service_user *ni;
+static enum nss_status (*nss_setgrent) (int stayopen);
+static enum nss_status (*nss_getgrnam_r) (const char *name,
+ struct group * grp, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_getgrgid_r) (gid_t gid, struct group * grp,
+ char *buffer, size_t buflen,
+ int *errnop);
+static enum nss_status (*nss_getgrent_r) (struct group * grp, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_endgrent) (void);
+
+/* Get the declaration of the parser function. */
+#define ENTNAME grent
+#define STRUCTURE group
+#define EXTERN_PARSER
+#include <nss/nss_files/files-parse.c>
+
+/* Structure for remembering -group members ... */
+#define BLACKLIST_INITIAL_SIZE 512
+#define BLACKLIST_INCREMENT 256
+struct blacklist_t
+{
+ char *data;
+ int current;
+ int size;
+};
+
+struct ent_t
+{
+ bool files;
+ enum nss_status setent_status;
+ FILE *stream;
+ struct blacklist_t blacklist;
+};
+typedef struct ent_t ent_t;
+
+static ent_t ext_ent = { true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
+
+/* Protect global state against multiple changers. */
+__libc_lock_define_initialized (static, lock)
+
+/* Prototypes for local functions. */
+static void blacklist_store_name (const char *, ent_t *);
+static bool in_blacklist (const char *, int, ent_t *);
+
+/* Initialize the NSS interface/functions. The calling function must
+ hold the lock. */
+static void
+init_nss_interface (void)
+{
+ if (__nss_database_lookup ("group_compat", NULL, "nis", &ni) >= 0)
+ {
+ nss_setgrent = __nss_lookup_function (ni, "setgrent");
+ nss_getgrnam_r = __nss_lookup_function (ni, "getgrnam_r");
+ nss_getgrgid_r = __nss_lookup_function (ni, "getgrgid_r");
+ nss_getgrent_r = __nss_lookup_function (ni, "getgrent_r");
+ nss_endgrent = __nss_lookup_function (ni, "endgrent");
+ }
+}
+
+static enum nss_status
+internal_setgrent (ent_t *ent, int stayopen, int needent)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+
+ ent->files = true;
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ if (ent->stream == NULL)
+ {
+ ent->stream = fopen ("/etc/group", "rme");
+
+ if (ent->stream == NULL)
+ status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
+ else
+ /* We take care of locking ourself. */
+ __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
+ }
+ else
+ rewind (ent->stream);
+
+ if (needent && status == NSS_STATUS_SUCCESS && nss_setgrent)
+ ent->setent_status = nss_setgrent (stayopen);
+
+ return status;
+}
+
+
+enum nss_status
+_nss_compat_setgrent (int stayopen)
+{
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ result = internal_setgrent (&ext_ent, stayopen, 1);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static enum nss_status
+internal_endgrent (ent_t *ent)
+{
+ if (ent->stream != NULL)
+ {
+ fclose (ent->stream);
+ ent->stream = NULL;
+ }
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_endgrent (void)
+{
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (nss_endgrent)
+ nss_endgrent ();
+
+ result = internal_endgrent (&ext_ent);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+/* get the next group from NSS (+ entry) */
+static enum nss_status
+getgrent_next_nss (struct group *result, ent_t *ent, char *buffer,
+ size_t buflen, int *errnop)
+{
+ if (!nss_getgrent_r)
+ return NSS_STATUS_UNAVAIL;
+
+ /* If the setgrent call failed, say so. */
+ if (ent->setent_status != NSS_STATUS_SUCCESS)
+ return ent->setent_status;
+
+ do
+ {
+ enum nss_status status;
+
+ if ((status = nss_getgrent_r (result, buffer, buflen, errnop)) !=
+ NSS_STATUS_SUCCESS)
+ return status;
+ }
+ while (in_blacklist (result->gr_name, strlen (result->gr_name), ent));
+
+ return NSS_STATUS_SUCCESS;
+}
+
+/* This function handle the +group entrys in /etc/group */
+static enum nss_status
+getgrnam_plusgroup (const char *name, struct group *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ if (!nss_getgrnam_r)
+ return NSS_STATUS_UNAVAIL;
+
+ enum nss_status status = nss_getgrnam_r (name, result, buffer, buflen,
+ errnop);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+ if (in_blacklist (result->gr_name, strlen (result->gr_name), ent))
+ return NSS_STATUS_NOTFOUND;
+
+ /* We found the entry. */
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+getgrent_next_file (struct group *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+ while (1)
+ {
+ fpos_t pos;
+ int parse_res = 0;
+ char *p;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
+ /* This is a real entry. */
+ break;
+
+ /* -group */
+ if (result->gr_name[0] == '-' && result->gr_name[1] != '\0'
+ && result->gr_name[1] != '@')
+ {
+ blacklist_store_name (&result->gr_name[1], ent);
+ continue;
+ }
+
+ /* +group */
+ if (result->gr_name[0] == '+' && result->gr_name[1] != '\0'
+ && result->gr_name[1] != '@')
+ {
+ size_t len = strlen (result->gr_name);
+ char buf[len];
+ enum nss_status status;
+
+ /* Store the group in the blacklist for the "+" at the end of
+ /etc/group */
+ memcpy (buf, &result->gr_name[1], len);
+ status = getgrnam_plusgroup (&result->gr_name[1], result, ent,
+ buffer, buflen, errnop);
+ blacklist_store_name (buf, ent);
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ else if (status == NSS_STATUS_RETURN /* We couldn't parse the entry*/
+ || status == NSS_STATUS_NOTFOUND) /* No group in NIS */
+ continue;
+ else
+ {
+ if (status == NSS_STATUS_TRYAGAIN)
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ return status;
+ }
+ }
+
+ /* +:... */
+ if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
+ {
+ ent->files = false;
+
+ return getgrent_next_nss (result, ent, buffer, buflen, errnop);
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_compat_getgrent_r (struct group *grp, char *buffer, size_t buflen,
+ int *errnop)
+{
+ enum nss_status result = NSS_STATUS_SUCCESS;
+
+ __libc_lock_lock (lock);
+
+ /* Be prepared that the setgrent function was not called before. */
+ if (ni == NULL)
+ init_nss_interface ();
+
+ if (ext_ent.stream == NULL)
+ result = internal_setgrent (&ext_ent, 1, 1);
+
+ if (result == NSS_STATUS_SUCCESS)
+ {
+ if (ext_ent.files)
+ result = getgrent_next_file (grp, &ext_ent, buffer, buflen, errnop);
+ else
+ result = getgrent_next_nss (grp, &ext_ent, buffer, buflen, errnop);
+ }
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+/* Searches in /etc/group and the NIS/NIS+ map for a special group */
+static enum nss_status
+internal_getgrnam_r (const char *name, struct group *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+ while (1)
+ {
+ fpos_t pos;
+ int parse_res = 0;
+ char *p;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ /* This is a real entry. */
+ if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
+ {
+ if (strcmp (result->gr_name, name) == 0)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -group */
+ if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
+ {
+ if (strcmp (&result->gr_name[1], name) == 0)
+ return NSS_STATUS_NOTFOUND;
+ else
+ continue;
+ }
+
+ /* +group */
+ if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
+ {
+ if (strcmp (name, &result->gr_name[1]) == 0)
+ {
+ enum nss_status status;
+
+ status = getgrnam_plusgroup (name, result, ent,
+ buffer, buflen, errnop);
+ if (status == NSS_STATUS_RETURN)
+ /* We couldn't parse the entry */
+ continue;
+ else
+ return status;
+ }
+ }
+ /* +:... */
+ if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
+ {
+ enum nss_status status;
+
+ status = getgrnam_plusgroup (name, result, ent,
+ buffer, buflen, errnop);
+ if (status == NSS_STATUS_RETURN)
+ /* We couldn't parse the entry */
+ continue;
+ else
+ return status;
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_getgrnam_r (const char *name, struct group *grp,
+ char *buffer, size_t buflen, int *errnop)
+{
+ ent_t ent = { true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
+ enum nss_status result;
+
+ if (name[0] == '-' || name[0] == '+')
+ return NSS_STATUS_NOTFOUND;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ __libc_lock_unlock (lock);
+
+ result = internal_setgrent (&ent, 0, 0);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getgrnam_r (name, grp, &ent, buffer, buflen, errnop);
+
+ internal_endgrent (&ent);
+
+ return result;
+}
+
+/* Searches in /etc/group and the NIS/NIS+ map for a special group id */
+static enum nss_status
+internal_getgrgid_r (gid_t gid, struct group *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+ while (1)
+ {
+ fpos_t pos;
+ int parse_res = 0;
+ char *p;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ /* This is a real entry. */
+ if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
+ {
+ if (result->gr_gid == gid)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -group */
+ if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
+ {
+ blacklist_store_name (&result->gr_name[1], ent);
+ continue;
+ }
+
+ /* +group */
+ if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
+ {
+ /* Yes, no +1, see the memcpy call below. */
+ size_t len = strlen (result->gr_name);
+ char buf[len];
+ enum nss_status status;
+
+ /* Store the group in the blacklist for the "+" at the end of
+ /etc/group */
+ memcpy (buf, &result->gr_name[1], len);
+ status = getgrnam_plusgroup (&result->gr_name[1], result, ent,
+ buffer, buflen, errnop);
+ blacklist_store_name (buf, ent);
+ if (status == NSS_STATUS_SUCCESS && result->gr_gid == gid)
+ break;
+ else
+ continue;
+ }
+ /* +:... */
+ if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
+ {
+ if (!nss_getgrgid_r)
+ return NSS_STATUS_UNAVAIL;
+
+ enum nss_status status = nss_getgrgid_r (gid, result, buffer, buflen,
+ errnop);
+ if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_getgrgid_r (gid_t gid, struct group *grp,
+ char *buffer, size_t buflen, int *errnop)
+{
+ ent_t ent = { true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ __libc_lock_unlock (lock);
+
+ result = internal_setgrent (&ent, 0, 0);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getgrgid_r (gid, grp, &ent, buffer, buflen, errnop);
+
+ internal_endgrent (&ent);
+
+ return result;
+}
+
+
+/* Support routines for remembering -@netgroup and -user entries.
+ The names are stored in a single string with `|' as separator. */
+static void
+blacklist_store_name (const char *name, ent_t *ent)
+{
+ int namelen = strlen (name);
+ char *tmp;
+
+ /* first call, setup cache */
+ if (ent->blacklist.size == 0)
+ {
+ ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
+ ent->blacklist.data = malloc (ent->blacklist.size);
+ if (ent->blacklist.data == NULL)
+ return;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ ent->blacklist.current = 1;
+ }
+ else
+ {
+ if (in_blacklist (name, namelen, ent))
+ return; /* no duplicates */
+
+ if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
+ {
+ ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
+ tmp = realloc (ent->blacklist.data, ent->blacklist.size);
+ if (tmp == NULL)
+ {
+ free (ent->blacklist.data);
+ ent->blacklist.size = 0;
+ return;
+ }
+ ent->blacklist.data = tmp;
+ }
+ }
+
+ tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
+ *tmp++ = '|';
+ *tmp = '\0';
+ ent->blacklist.current += namelen + 1;
+
+ return;
+}
+
+/* Return whether ent->blacklist contains name. */
+static bool
+in_blacklist (const char *name, int namelen, ent_t *ent)
+{
+ char buf[namelen + 3];
+ char *cp;
+
+ if (ent->blacklist.data == NULL)
+ return false;
+
+ buf[0] = '|';
+ cp = stpcpy (&buf[1], name);
+ *cp++ = '|';
+ *cp = '\0';
+ return strstr (ent->blacklist.data, buf) != NULL;
+}
Index: glibc-2.26/nss/nss_compat/compat-initgroups.c
===================================================================
--- /dev/null
+++ glibc-2.26/nss/nss_compat/compat-initgroups.c
@@ -0,0 +1,575 @@
+/* Copyright (C) 1998-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <nss.h>
+#include <stdio_ext.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <nsswitch.h>
+#include <libc-lock.h>
+#include <kernel-features.h>
+#include <scratch_buffer.h>
+
+static service_user *ni;
+/* Type of the lookup function. */
+static enum nss_status (*nss_initgroups_dyn) (const char *, gid_t,
+ long int *, long int *,
+ gid_t **, long int, int *);
+static enum nss_status (*nss_getgrnam_r) (const char *name,
+ struct group * grp, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_getgrgid_r) (gid_t gid, struct group * grp,
+ char *buffer, size_t buflen,
+ int *errnop);
+static enum nss_status (*nss_setgrent) (int stayopen);
+static enum nss_status (*nss_getgrent_r) (struct group * grp, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_endgrent) (void);
+
+/* Protect global state against multiple changers. */
+__libc_lock_define_initialized (static, lock)
+
+
+/* Get the declaration of the parser function. */
+#define ENTNAME grent
+#define STRUCTURE group
+#define EXTERN_PARSER
+#include <nss/nss_files/files-parse.c>
+
+/* Structure for remembering -group members ... */
+#define BLACKLIST_INITIAL_SIZE 512
+#define BLACKLIST_INCREMENT 256
+struct blacklist_t
+{
+ char *data;
+ int current;
+ int size;
+};
+
+struct ent_t
+{
+ bool files;
+ bool need_endgrent;
+ bool skip_initgroups_dyn;
+ FILE *stream;
+ struct blacklist_t blacklist;
+};
+typedef struct ent_t ent_t;
+
+/* Prototypes for local functions. */
+static void blacklist_store_name (const char *, ent_t *);
+static bool in_blacklist (const char *, int, ent_t *);
+
+/* Initialize the NSS interface/functions. The calling function must
+ hold the lock. */
+static void
+init_nss_interface (void)
+{
+ __libc_lock_lock (lock);
+
+ /* Retest. */
+ if (ni == NULL
+ && __nss_database_lookup ("group_compat", NULL, "nis", &ni) >= 0)
+ {
+ nss_initgroups_dyn = __nss_lookup_function (ni, "initgroups_dyn");
+ nss_getgrnam_r = __nss_lookup_function (ni, "getgrnam_r");
+ nss_getgrgid_r = __nss_lookup_function (ni, "getgrgid_r");
+ nss_setgrent = __nss_lookup_function (ni, "setgrent");
+ nss_getgrent_r = __nss_lookup_function (ni, "getgrent_r");
+ nss_endgrent = __nss_lookup_function (ni, "endgrent");
+ }
+
+ __libc_lock_unlock (lock);
+}
+
+static enum nss_status
+internal_setgrent (ent_t *ent)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+
+ ent->files = true;
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ ent->stream = fopen ("/etc/group", "rme");
+
+ if (ent->stream == NULL)
+ status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
+ else
+ /* We take care of locking ourself. */
+ __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
+
+ return status;
+}
+
+
+static enum nss_status
+internal_endgrent (ent_t *ent)
+{
+ if (ent->stream != NULL)
+ {
+ fclose (ent->stream);
+ ent->stream = NULL;
+ }
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ if (ent->need_endgrent && nss_endgrent != NULL)
+ nss_endgrent ();
+
+ return NSS_STATUS_SUCCESS;
+}
+
+/* Add new group record. */
+static void
+add_group (long int *start, long int *size, gid_t **groupsp, long int limit,
+ gid_t gid)
+{
+ gid_t *groups = *groupsp;
+
+ /* Matches user. Insert this group. */
+ if (__glibc_unlikely (*start == *size))
+ {
+ /* Need a bigger buffer. */
+ gid_t *newgroups;
+ long int newsize;
+
+ if (limit > 0 && *size == limit)
+ /* We reached the maximum. */
+ return;
+
+ if (limit <= 0)
+ newsize = 2 * *size;
+ else
+ newsize = MIN (limit, 2 * *size);
+
+ newgroups = realloc (groups, newsize * sizeof (*groups));
+ if (newgroups == NULL)
+ return;
+ *groupsp = groups = newgroups;
+ *size = newsize;
+ }
+
+ groups[*start] = gid;
+ *start += 1;
+}
+
+/* This function checks, if the user is a member of this group and if
+ yes, add the group id to the list. Return nonzero is we couldn't
+ handle the group because the user is not in the member list. */
+static int
+check_and_add_group (const char *user, gid_t group, long int *start,
+ long int *size, gid_t **groupsp, long int limit,
+ struct group *grp)
+{
+ char **member;
+
+ /* Don't add main group to list of groups. */
+ if (grp->gr_gid == group)
+ return 0;
+
+ for (member = grp->gr_mem; *member != NULL; ++member)
+ if (strcmp (*member, user) == 0)
+ {
+ add_group (start, size, groupsp, limit, grp->gr_gid);
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Get the next group from NSS (+ entry). If the NSS module supports
+ initgroups_dyn, get all entries at once. */
+static enum nss_status
+getgrent_next_nss (ent_t *ent, char *buffer, size_t buflen, const char *user,
+ gid_t group, long int *start, long int *size,
+ gid_t **groupsp, long int limit, int *errnop)
+{
+ enum nss_status status;
+ struct group grpbuf;
+
+ /* Try nss_initgroups_dyn if supported. We also need getgrgid_r.
+ If this function is not supported, step through the whole group
+ database with getgrent_r. */
+ if (! ent->skip_initgroups_dyn)
+ {
+ long int mystart = 0;
+ long int mysize = limit <= 0 ? *size : limit;
+ gid_t *mygroups = malloc (mysize * sizeof (gid_t));
+
+ if (mygroups == NULL)
+ return NSS_STATUS_TRYAGAIN;
+
+ /* For every gid in the list we get from the NSS module,
+ get the whole group entry. We need to do this, since we
+ need the group name to check if it is in the blacklist.
+ In worst case, this is as twice as slow as stepping with
+ getgrent_r through the whole group database. But for large
+ group databases this is faster, since the user can only be
+ in a limited number of groups. */
+ if (nss_initgroups_dyn (user, group, &mystart, &mysize, &mygroups,
+ limit, errnop) == NSS_STATUS_SUCCESS)
+ {
+ status = NSS_STATUS_NOTFOUND;
+
+ /* If there is no blacklist we can trust the underlying
+ initgroups implementation. */
+ if (ent->blacklist.current <= 1)
+ for (int i = 0; i < mystart; i++)
+ add_group (start, size, groupsp, limit, mygroups[i]);
+ else
+ {
+ /* A temporary buffer. We use the normal buffer, until we find
+ an entry, for which this buffer is to small. In this case, we
+ overwrite the pointer with one to a bigger buffer. */
+ char *tmpbuf = buffer;
+ size_t tmplen = buflen;
+ bool use_malloc = false;
+
+ for (int i = 0; i < mystart; i++)
+ {
+ while ((status = nss_getgrgid_r (mygroups[i], &grpbuf,
+ tmpbuf, tmplen, errnop))
+ == NSS_STATUS_TRYAGAIN
+ && *errnop == ERANGE)
+ {
+ if (__libc_use_alloca (tmplen * 2))
+ {
+ if (tmpbuf == buffer)
+ {
+ tmplen *= 2;
+ tmpbuf = __alloca (tmplen);
+ }
+ else
+ tmpbuf = extend_alloca (tmpbuf, tmplen, tmplen * 2);
+ }
+ else
+ {
+ tmplen *= 2;
+ char *newbuf = realloc (use_malloc ? tmpbuf : NULL, tmplen);
+
+ if (newbuf == NULL)
+ {
+ status = NSS_STATUS_TRYAGAIN;
+ goto done;
+ }
+ use_malloc = true;
+ tmpbuf = newbuf;
+ }
+ }
+
+ if (__builtin_expect (status != NSS_STATUS_NOTFOUND, 1))
+ {
+ if (__builtin_expect (status != NSS_STATUS_SUCCESS, 0))
+ goto done;
+
+ if (!in_blacklist (grpbuf.gr_name,
+ strlen (grpbuf.gr_name), ent)
+ && check_and_add_group (user, group, start, size,
+ groupsp, limit, &grpbuf))
+ {
+ if (nss_setgrent != NULL)
+ {
+ nss_setgrent (1);
+ ent->need_endgrent = true;
+ }
+ ent->skip_initgroups_dyn = true;
+
+ goto iter;
+ }
+ }
+ }
+
+ status = NSS_STATUS_NOTFOUND;
+
+ done:
+ if (use_malloc)
+ free (tmpbuf);
+ }
+
+ free (mygroups);
+
+ return status;
+ }
+
+ free (mygroups);
+ }
+
+ /* If we come here, the NSS module does not support initgroups_dyn
+ or we were confronted with a split group. In these cases we have
+ to step through the whole list ourself. */
+ iter:
+ do
+ {
+ if ((status = nss_getgrent_r (&grpbuf, buffer, buflen, errnop)) !=
+ NSS_STATUS_SUCCESS)
+ break;
+ }
+ while (in_blacklist (grpbuf.gr_name, strlen (grpbuf.gr_name), ent));
+
+ if (status == NSS_STATUS_SUCCESS)
+ check_and_add_group (user, group, start, size, groupsp, limit, &grpbuf);
+
+ return status;
+}
+
+static enum nss_status
+internal_getgrent_r (ent_t *ent, char *buffer, size_t buflen, const char *user,
+ gid_t group, long int *start, long int *size,
+ gid_t **groupsp, long int limit, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+ struct group grpbuf;
+
+ if (!ent->files)
+ return getgrent_next_nss (ent, buffer, buflen, user, group,
+ start, size, groupsp, limit, errnop);
+
+ while (1)
+ {
+ fpos_t pos;
+ int parse_res = 0;
+ char *p;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_grent (p, &grpbuf, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ if (grpbuf.gr_name[0] != '+' && grpbuf.gr_name[0] != '-')
+ /* This is a real entry. */
+ break;
+
+ /* -group */
+ if (grpbuf.gr_name[0] == '-' && grpbuf.gr_name[1] != '\0'
+ && grpbuf.gr_name[1] != '@')
+ {
+ blacklist_store_name (&grpbuf.gr_name[1], ent);
+ continue;
+ }
+
+ /* +group */
+ if (grpbuf.gr_name[0] == '+' && grpbuf.gr_name[1] != '\0'
+ && grpbuf.gr_name[1] != '@')
+ {
+ if (in_blacklist (&grpbuf.gr_name[1],
+ strlen (&grpbuf.gr_name[1]), ent))
+ continue;
+ /* Store the group in the blacklist for the "+" at the end of
+ /etc/group */
+ blacklist_store_name (&grpbuf.gr_name[1], ent);
+ if (nss_getgrnam_r == NULL)
+ return NSS_STATUS_UNAVAIL;
+ else if (nss_getgrnam_r (&grpbuf.gr_name[1], &grpbuf, buffer,
+ buflen, errnop) != NSS_STATUS_SUCCESS)
+ continue;
+
+ check_and_add_group (user, group, start, size, groupsp,
+ limit, &grpbuf);
+
+ return NSS_STATUS_SUCCESS;
+ }
+
+ /* +:... */
+ if (grpbuf.gr_name[0] == '+' && grpbuf.gr_name[1] == '\0')
+ {
+ /* If the selected module does not support getgrent_r or
+ initgroups_dyn, abort. We cannot find the needed group
+ entries. */
+ if (nss_initgroups_dyn == NULL || nss_getgrgid_r == NULL)
+ {
+ if (nss_setgrent != NULL)
+ {
+ nss_setgrent (1);
+ ent->need_endgrent = true;
+ }
+ ent->skip_initgroups_dyn = true;
+
+ if (nss_getgrent_r == NULL)
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ ent->files = false;
+
+ return getgrent_next_nss (ent, buffer, buflen, user, group,
+ start, size, groupsp, limit, errnop);
+ }
+ }
+
+ check_and_add_group (user, group, start, size, groupsp, limit, &grpbuf);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_compat_initgroups_dyn (const char *user, gid_t group, long int *start,
+ long int *size, gid_t **groupsp, long int limit,
+ int *errnop)
+{
+ enum nss_status status;
+ ent_t intern = { true, false, false, NULL, {NULL, 0, 0} };
+
+ status = internal_setgrent (&intern);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+ struct scratch_buffer tmpbuf;
+ scratch_buffer_init (&tmpbuf);
+
+ do
+ {
+ while ((status = internal_getgrent_r (&intern, tmpbuf.data, tmpbuf.length,
+ user, group, start, size,
+ groupsp, limit, errnop))
+ == NSS_STATUS_TRYAGAIN && *errnop == ERANGE)
+ if (!scratch_buffer_grow (&tmpbuf))
+ goto done;
+ }
+ while (status == NSS_STATUS_SUCCESS);
+
+ status = NSS_STATUS_SUCCESS;
+
+ done:
+ scratch_buffer_free (&tmpbuf);
+
+ internal_endgrent (&intern);
+
+ return status;
+}
+
+
+/* Support routines for remembering -@netgroup and -user entries.
+ The names are stored in a single string with `|' as separator. */
+static void
+blacklist_store_name (const char *name, ent_t *ent)
+{
+ int namelen = strlen (name);
+ char *tmp;
+
+ /* First call, setup cache. */
+ if (ent->blacklist.size == 0)
+ {
+ ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
+ ent->blacklist.data = malloc (ent->blacklist.size);
+ if (ent->blacklist.data == NULL)
+ return;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ ent->blacklist.current = 1;
+ }
+ else
+ {
+ if (in_blacklist (name, namelen, ent))
+ return; /* no duplicates */
+
+ if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
+ {
+ ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
+ tmp = realloc (ent->blacklist.data, ent->blacklist.size);
+ if (tmp == NULL)
+ {
+ free (ent->blacklist.data);
+ ent->blacklist.size = 0;
+ return;
+ }
+ ent->blacklist.data = tmp;
+ }
+ }
+
+ tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
+ *tmp++ = '|';
+ *tmp = '\0';
+ ent->blacklist.current += namelen + 1;
+
+ return;
+}
+
+/* Return whether ent->blacklist contains name. */
+static bool
+in_blacklist (const char *name, int namelen, ent_t *ent)
+{
+ char buf[namelen + 3];
+ char *cp;
+
+ if (ent->blacklist.data == NULL)
+ return false;
+
+ buf[0] = '|';
+ cp = stpcpy (&buf[1], name);
+ *cp++ = '|';
+ *cp = '\0';
+ return strstr (ent->blacklist.data, buf) != NULL;
+}
Index: glibc-2.26/nss/nss_compat/compat-pwd.c
===================================================================
--- /dev/null
+++ glibc-2.26/nss/nss_compat/compat-pwd.c
@@ -0,0 +1,1131 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <nss.h>
+#include <nsswitch.h>
+#include <pwd.h>
+#include <stdio_ext.h>
+#include <string.h>
+#include <libc-lock.h>
+#include <kernel-features.h>
+
+#include "netgroup.h"
+#include "nisdomain.h"
+
+static service_user *ni;
+static enum nss_status (*nss_setpwent) (int stayopen);
+static enum nss_status (*nss_getpwnam_r) (const char *name,
+ struct passwd * pwd, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_getpwuid_r) (uid_t uid, struct passwd * pwd,
+ char *buffer, size_t buflen,
+ int *errnop);
+static enum nss_status (*nss_getpwent_r) (struct passwd * pwd, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_endpwent) (void);
+
+/* Get the declaration of the parser function. */
+#define ENTNAME pwent
+#define STRUCTURE passwd
+#define EXTERN_PARSER
+#include <nss/nss_files/files-parse.c>
+
+/* Structure for remembering -@netgroup and -user members ... */
+#define BLACKLIST_INITIAL_SIZE 512
+#define BLACKLIST_INCREMENT 256
+struct blacklist_t
+{
+ char *data;
+ int current;
+ int size;
+};
+
+struct ent_t
+{
+ bool netgroup;
+ bool first;
+ bool files;
+ enum nss_status setent_status;
+ FILE *stream;
+ struct blacklist_t blacklist;
+ struct passwd pwd;
+ struct __netgrent netgrdata;
+};
+typedef struct ent_t ent_t;
+
+static ent_t ext_ent = { false, false, true, NSS_STATUS_SUCCESS, NULL,
+ { NULL, 0, 0 },
+ { NULL, NULL, 0, 0, NULL, NULL, NULL }};
+
+/* Protect global state against multiple changers. */
+__libc_lock_define_initialized (static, lock)
+
+/* Prototypes for local functions. */
+static void blacklist_store_name (const char *, ent_t *);
+static bool in_blacklist (const char *, int, ent_t *);
+
+/* Initialize the NSS interface/functions. The calling function must
+ hold the lock. */
+static void
+init_nss_interface (void)
+{
+ if (__nss_database_lookup ("passwd_compat", NULL, "nis", &ni) >= 0)
+ {
+ nss_setpwent = __nss_lookup_function (ni, "setpwent");
+ nss_getpwnam_r = __nss_lookup_function (ni, "getpwnam_r");
+ nss_getpwuid_r = __nss_lookup_function (ni, "getpwuid_r");
+ nss_getpwent_r = __nss_lookup_function (ni, "getpwent_r");
+ nss_endpwent = __nss_lookup_function (ni, "endpwent");
+ }
+}
+
+static void
+give_pwd_free (struct passwd *pwd)
+{
+ free (pwd->pw_name);
+ free (pwd->pw_passwd);
+ free (pwd->pw_gecos);
+ free (pwd->pw_dir);
+ free (pwd->pw_shell);
+
+ memset (pwd, '\0', sizeof (struct passwd));
+}
+
+static size_t
+pwd_need_buflen (struct passwd *pwd)
+{
+ size_t len = 0;
+
+ if (pwd->pw_passwd != NULL)
+ len += strlen (pwd->pw_passwd) + 1;
+
+ if (pwd->pw_gecos != NULL)
+ len += strlen (pwd->pw_gecos) + 1;
+
+ if (pwd->pw_dir != NULL)
+ len += strlen (pwd->pw_dir) + 1;
+
+ if (pwd->pw_shell != NULL)
+ len += strlen (pwd->pw_shell) + 1;
+
+ return len;
+}
+
+static void
+copy_pwd_changes (struct passwd *dest, struct passwd *src,
+ char *buffer, size_t buflen)
+{
+ if (src->pw_passwd != NULL && strlen (src->pw_passwd))
+ {
+ if (buffer == NULL)
+ dest->pw_passwd = strdup (src->pw_passwd);
+ else if (dest->pw_passwd &&
+ strlen (dest->pw_passwd) >= strlen (src->pw_passwd))
+ strcpy (dest->pw_passwd, src->pw_passwd);
+ else
+ {
+ dest->pw_passwd = buffer;
+ strcpy (dest->pw_passwd, src->pw_passwd);
+ buffer += strlen (dest->pw_passwd) + 1;
+ buflen = buflen - (strlen (dest->pw_passwd) + 1);
+ }
+ }
+
+ if (src->pw_gecos != NULL && strlen (src->pw_gecos))
+ {
+ if (buffer == NULL)
+ dest->pw_gecos = strdup (src->pw_gecos);
+ else if (dest->pw_gecos &&
+ strlen (dest->pw_gecos) >= strlen (src->pw_gecos))
+ strcpy (dest->pw_gecos, src->pw_gecos);
+ else
+ {
+ dest->pw_gecos = buffer;
+ strcpy (dest->pw_gecos, src->pw_gecos);
+ buffer += strlen (dest->pw_gecos) + 1;
+ buflen = buflen - (strlen (dest->pw_gecos) + 1);
+ }
+ }
+ if (src->pw_dir != NULL && strlen (src->pw_dir))
+ {
+ if (buffer == NULL)
+ dest->pw_dir = strdup (src->pw_dir);
+ else if (dest->pw_dir && strlen (dest->pw_dir) >= strlen (src->pw_dir))
+ strcpy (dest->pw_dir, src->pw_dir);
+ else
+ {
+ dest->pw_dir = buffer;
+ strcpy (dest->pw_dir, src->pw_dir);
+ buffer += strlen (dest->pw_dir) + 1;
+ buflen = buflen - (strlen (dest->pw_dir) + 1);
+ }
+ }
+
+ if (src->pw_shell != NULL && strlen (src->pw_shell))
+ {
+ if (buffer == NULL)
+ dest->pw_shell = strdup (src->pw_shell);
+ else if (dest->pw_shell &&
+ strlen (dest->pw_shell) >= strlen (src->pw_shell))
+ strcpy (dest->pw_shell, src->pw_shell);
+ else
+ {
+ dest->pw_shell = buffer;
+ strcpy (dest->pw_shell, src->pw_shell);
+ buffer += strlen (dest->pw_shell) + 1;
+ buflen = buflen - (strlen (dest->pw_shell) + 1);
+ }
+ }
+}
+
+static enum nss_status
+internal_setpwent (ent_t *ent, int stayopen, int needent)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+
+ ent->first = ent->netgroup = false;
+ ent->files = true;
+ ent->setent_status = NSS_STATUS_SUCCESS;
+
+ /* If something was left over free it. */
+ if (ent->netgroup)
+ __internal_endnetgrent (&ent->netgrdata);
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ if (ent->stream == NULL)
+ {
+ ent->stream = fopen ("/etc/passwd", "rme");
+
+ if (ent->stream == NULL)
+ status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
+ else
+ /* We take care of locking ourself. */
+ __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
+ }
+ else
+ rewind (ent->stream);
+
+ give_pwd_free (&ent->pwd);
+
+ if (needent && status == NSS_STATUS_SUCCESS && nss_setpwent)
+ ent->setent_status = nss_setpwent (stayopen);
+
+ return status;
+}
+
+
+enum nss_status
+_nss_compat_setpwent (int stayopen)
+{
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ result = internal_setpwent (&ext_ent, stayopen, 1);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static enum nss_status
+internal_endpwent (ent_t *ent)
+{
+ if (ent->stream != NULL)
+ {
+ fclose (ent->stream);
+ ent->stream = NULL;
+ }
+
+ if (ent->netgroup)
+ __internal_endnetgrent (&ent->netgrdata);
+
+ ent->first = ent->netgroup = false;
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ give_pwd_free (&ent->pwd);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_endpwent (void)
+{
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (nss_endpwent)
+ nss_endpwent ();
+
+ result = internal_endpwent (&ext_ent);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static enum nss_status
+getpwent_next_nss_netgr (const char *name, struct passwd *result, ent_t *ent,
+ char *group, char *buffer, size_t buflen,
+ int *errnop)
+{
+ char *curdomain = NULL, *host, *user, *domain, *p2;
+ int status;
+ size_t p2len;
+
+ /* Leave function if NSS module does not support getpwnam_r,
+ we need this function here. */
+ if (!nss_getpwnam_r)
+ return NSS_STATUS_UNAVAIL;
+
+ if (ent->first)
+ {
+ memset (&ent->netgrdata, 0, sizeof (struct __netgrent));
+ __internal_setnetgrent (group, &ent->netgrdata);
+ ent->first = false;
+ }
+
+ while (1)
+ {
+ status = __internal_getnetgrent_r (&host, &user, &domain,
+ &ent->netgrdata, buffer, buflen,
+ errnop);
+ if (status != 1)
+ {
+ __internal_endnetgrent (&ent->netgrdata);
+ ent->netgroup = 0;
+ give_pwd_free (&ent->pwd);
+ return NSS_STATUS_RETURN;
+ }
+
+ if (user == NULL || user[0] == '-')
+ continue;
+
+ if (domain != NULL)
+ {
+ if (curdomain == NULL
+ && __nss_get_default_domain (&curdomain) != 0)
+ {
+ __internal_endnetgrent (&ent->netgrdata);
+ ent->netgroup = false;
+ give_pwd_free (&ent->pwd);
+ return NSS_STATUS_UNAVAIL;
+ }
+ if (strcmp (curdomain, domain) != 0)
+ continue;
+ }
+
+ /* If name != NULL, we are called from getpwnam. */
+ if (name != NULL)
+ if (strcmp (user, name) != 0)
+ continue;
+
+ p2len = pwd_need_buflen (&ent->pwd);
+ if (p2len > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p2 = buffer + (buflen - p2len);
+ buflen -= p2len;
+
+ if (nss_getpwnam_r (user, result, buffer, buflen, errnop) !=
+ NSS_STATUS_SUCCESS)
+ continue;
+
+ if (!in_blacklist (result->pw_name, strlen (result->pw_name), ent))
+ {
+ /* Store the User in the blacklist for possible the "+" at the
+ end of /etc/passwd */
+ blacklist_store_name (result->pw_name, ent);
+ copy_pwd_changes (result, &ent->pwd, p2, p2len);
+ break;
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+/* get the next user from NSS (+ entry) */
+static enum nss_status
+getpwent_next_nss (struct passwd *result, ent_t *ent, char *buffer,
+ size_t buflen, int *errnop)
+{
+ enum nss_status status;
+ char *p2;
+ size_t p2len;
+
+ /* Return if NSS module does not support getpwent_r. */
+ if (!nss_getpwent_r)
+ return NSS_STATUS_UNAVAIL;
+
+ /* If the setpwent call failed, say so. */
+ if (ent->setent_status != NSS_STATUS_SUCCESS)
+ return ent->setent_status;
+
+ p2len = pwd_need_buflen (&ent->pwd);
+ if (p2len > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p2 = buffer + (buflen - p2len);
+ buflen -= p2len;
+
+ if (ent->first)
+ ent->first = false;
+
+ do
+ {
+ if ((status = nss_getpwent_r (result, buffer, buflen, errnop)) !=
+ NSS_STATUS_SUCCESS)
+ return status;
+ }
+ while (in_blacklist (result->pw_name, strlen (result->pw_name), ent));
+
+ copy_pwd_changes (result, &ent->pwd, p2, p2len);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+/* This function handle the +user entrys in /etc/passwd */
+static enum nss_status
+getpwnam_plususer (const char *name, struct passwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ if (!nss_getpwnam_r)
+ return NSS_STATUS_UNAVAIL;
+
+ struct passwd pwd;
+ memset (&pwd, '\0', sizeof (struct passwd));
+
+ copy_pwd_changes (&pwd, result, NULL, 0);
+
+ size_t plen = pwd_need_buflen (&pwd);
+ if (plen > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ char *p = buffer + (buflen - plen);
+ buflen -= plen;
+
+ enum nss_status status = nss_getpwnam_r (name, result, buffer, buflen,
+ errnop);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+ if (in_blacklist (result->pw_name, strlen (result->pw_name), ent))
+ return NSS_STATUS_NOTFOUND;
+
+ copy_pwd_changes (result, &pwd, p, plen);
+ give_pwd_free (&pwd);
+ /* We found the entry. */
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+getpwent_next_file (struct passwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+ while (1)
+ {
+ fpos_t pos;
+ char *p;
+ int parse_res;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
+ /* This is a real entry. */
+ break;
+
+ /* -@netgroup */
+ if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ /* XXX Do not use fixed length buffer. */
+ char buf2[1024];
+ char *user, *host, *domain;
+ struct __netgrent netgrdata;
+
+ memset (&netgrdata, 0, sizeof (struct __netgrent));
+ __internal_setnetgrent (&result->pw_name[2], &netgrdata);
+ while (__internal_getnetgrent_r (&host, &user, &domain, &netgrdata,
+ buf2, sizeof (buf2), errnop))
+ {
+ if (user != NULL && user[0] != '-')
+ blacklist_store_name (user, ent);
+ }
+ __internal_endnetgrent (&netgrdata);
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ enum nss_status status;
+
+ ent->netgroup = true;
+ ent->first = true;
+ copy_pwd_changes (&ent->pwd, result, NULL, 0);
+
+ status = getpwent_next_nss_netgr (NULL, result, ent,
+ &result->pw_name[2],
+ buffer, buflen, errnop);
+ if (status == NSS_STATUS_RETURN)
+ continue;
+ else
+ return status;
+ }
+
+ /* -user */
+ if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ blacklist_store_name (&result->pw_name[1], ent);
+ continue;
+ }
+
+ /* +user */
+ if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ size_t len = strlen (result->pw_name);
+ char buf[len];
+ enum nss_status status;
+
+ /* Store the User in the blacklist for the "+" at the end of
+ /etc/passwd */
+ memcpy (buf, &result->pw_name[1], len);
+ status = getpwnam_plususer (&result->pw_name[1], result, ent,
+ buffer, buflen, errnop);
+ blacklist_store_name (buf, ent);
+
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ else if (status == NSS_STATUS_RETURN /* We couldn't parse the entry */
+ || status == NSS_STATUS_NOTFOUND) /* entry doesn't exist */
+ continue;
+ else
+ {
+ if (status == NSS_STATUS_TRYAGAIN)
+ {
+ /* The parser ran out of space */
+ fsetpos (ent->stream, &pos);
+ *errnop = ERANGE;
+ }
+ return status;
+ }
+ }
+
+ /* +:... */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
+ {
+ ent->files = false;
+ ent->first = true;
+ copy_pwd_changes (&ent->pwd, result, NULL, 0);
+
+ return getpwent_next_nss (result, ent, buffer, buflen, errnop);
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+static enum nss_status
+internal_getpwent_r (struct passwd *pw, ent_t *ent, char *buffer,
+ size_t buflen, int *errnop)
+{
+ if (ent->netgroup)
+ {
+ enum nss_status status;
+
+ /* We are searching members in a netgroup */
+ /* Since this is not the first call, we don't need the group name */
+ status = getpwent_next_nss_netgr (NULL, pw, ent, NULL, buffer, buflen,
+ errnop);
+ if (status == NSS_STATUS_RETURN)
+ return getpwent_next_file (pw, ent, buffer, buflen, errnop);
+ else
+ return status;
+ }
+ else if (ent->files)
+ return getpwent_next_file (pw, ent, buffer, buflen, errnop);
+ else
+ return getpwent_next_nss (pw, ent, buffer, buflen, errnop);
+
+}
+
+enum nss_status
+_nss_compat_getpwent_r (struct passwd *pwd, char *buffer, size_t buflen,
+ int *errnop)
+{
+ enum nss_status result = NSS_STATUS_SUCCESS;
+
+ __libc_lock_lock (lock);
+
+ /* Be prepared that the setpwent function was not called before. */
+ if (ni == NULL)
+ init_nss_interface ();
+
+ if (ext_ent.stream == NULL)
+ result = internal_setpwent (&ext_ent, 1, 1);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getpwent_r (pwd, &ext_ent, buffer, buflen, errnop);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
+static enum nss_status
+internal_getpwnam_r (const char *name, struct passwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+
+ while (1)
+ {
+ fpos_t pos;
+ char *p;
+ int parse_res;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ {
+ return NSS_STATUS_NOTFOUND;
+ }
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ /* This is a real entry. */
+ if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
+ {
+ if (strcmp (result->pw_name, name) == 0)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -@netgroup */
+ if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ if (innetgr (&result->pw_name[2], NULL, name, NULL))
+ return NSS_STATUS_NOTFOUND;
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ enum nss_status status;
+
+ if (innetgr (&result->pw_name[2], NULL, name, NULL))
+ {
+ status = getpwnam_plususer (name, result, ent, buffer,
+ buflen, errnop);
+
+ if (status == NSS_STATUS_RETURN)
+ continue;
+
+ return status;
+ }
+ continue;
+ }
+
+ /* -user */
+ if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ if (strcmp (&result->pw_name[1], name) == 0)
+ return NSS_STATUS_NOTFOUND;
+ else
+ continue;
+ }
+
+ /* +user */
+ if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ if (strcmp (name, &result->pw_name[1]) == 0)
+ {
+ enum nss_status status;
+
+ status = getpwnam_plususer (name, result, ent, buffer, buflen,
+ errnop);
+ if (status == NSS_STATUS_RETURN)
+ /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+
+ /* +:... */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
+ {
+ enum nss_status status;
+
+ status = getpwnam_plususer (name, result, ent,
+ buffer, buflen, errnop);
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_getpwnam_r (const char *name, struct passwd *pwd,
+ char *buffer, size_t buflen, int *errnop)
+{
+ enum nss_status result;
+ ent_t ent = { false, false, true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 },
+ { NULL, NULL, 0, 0, NULL, NULL, NULL }};
+
+ if (name[0] == '-' || name[0] == '+')
+ return NSS_STATUS_NOTFOUND;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ __libc_lock_unlock (lock);
+
+ result = internal_setpwent (&ent, 0, 0);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getpwnam_r (name, pwd, &ent, buffer, buflen, errnop);
+
+ internal_endpwent (&ent);
+
+ return result;
+}
+
+/* This function handle the + entry in /etc/passwd for getpwuid */
+static enum nss_status
+getpwuid_plususer (uid_t uid, struct passwd *result, char *buffer,
+ size_t buflen, int *errnop)
+{
+ struct passwd pwd;
+ char *p;
+ size_t plen;
+
+ if (!nss_getpwuid_r)
+ return NSS_STATUS_UNAVAIL;
+
+ memset (&pwd, '\0', sizeof (struct passwd));
+
+ copy_pwd_changes (&pwd, result, NULL, 0);
+
+ plen = pwd_need_buflen (&pwd);
+ if (plen > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p = buffer + (buflen - plen);
+ buflen -= plen;
+
+ if (nss_getpwuid_r (uid, result, buffer, buflen, errnop) ==
+ NSS_STATUS_SUCCESS)
+ {
+ copy_pwd_changes (result, &pwd, p, plen);
+ give_pwd_free (&pwd);
+ /* We found the entry. */
+ return NSS_STATUS_SUCCESS;
+ }
+ else
+ {
+ /* Give buffer the old len back */
+ buflen += plen;
+ give_pwd_free (&pwd);
+ }
+ return NSS_STATUS_RETURN;
+}
+
+/* Searches in /etc/passwd and the NSS subsystem for a special user id */
+static enum nss_status
+internal_getpwuid_r (uid_t uid, struct passwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+
+ while (1)
+ {
+ fpos_t pos;
+ char *p;
+ int parse_res;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ /* This is a real entry. */
+ if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
+ {
+ if (result->pw_uid == uid)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -@netgroup */
+ if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ /* -1, because we remove first two character of pw_name. */
+ size_t len = strlen (result->pw_name) - 1;
+ char buf[len];
+ enum nss_status status;
+
+ memcpy (buf, &result->pw_name[2], len);
+
+ status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
+ if (status == NSS_STATUS_SUCCESS &&
+ innetgr (buf, NULL, result->pw_name, NULL))
+ return NSS_STATUS_NOTFOUND;
+
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
+ && result->pw_name[2] != '\0')
+ {
+ /* -1, because we remove first two characters of pw_name. */
+ size_t len = strlen (result->pw_name) - 1;
+ char buf[len];
+ enum nss_status status;
+
+ memcpy (buf, &result->pw_name[2], len);
+
+ status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
+
+ if (status == NSS_STATUS_RETURN)
+ continue;
+
+ if (status == NSS_STATUS_SUCCESS)
+ {
+ if (innetgr (buf, NULL, result->pw_name, NULL))
+ return NSS_STATUS_SUCCESS;
+ }
+ else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+
+ continue;
+ }
+
+ /* -user */
+ if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ size_t len = strlen (result->pw_name);
+ char buf[len];
+ enum nss_status status;
+
+ memcpy (buf, &result->pw_name[1], len);
+
+ status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
+ if (status == NSS_STATUS_SUCCESS &&
+ innetgr (buf, NULL, result->pw_name, NULL))
+ return NSS_STATUS_NOTFOUND;
+ continue;
+ }
+
+ /* +user */
+ if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
+ && result->pw_name[1] != '@')
+ {
+ size_t len = strlen (result->pw_name);
+ char buf[len];
+ enum nss_status status;
+
+ memcpy (buf, &result->pw_name[1], len);
+
+ status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
+
+ if (status == NSS_STATUS_RETURN)
+ continue;
+
+ if (status == NSS_STATUS_SUCCESS)
+ {
+ if (strcmp (buf, result->pw_name) == 0)
+ return NSS_STATUS_SUCCESS;
+ }
+ else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+
+ continue;
+ }
+
+ /* +:... */
+ if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
+ {
+ enum nss_status status;
+
+ status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ else if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_getpwuid_r (uid_t uid, struct passwd *pwd,
+ char *buffer, size_t buflen, int *errnop)
+{
+ enum nss_status result;
+ ent_t ent = { false, false, true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 },
+ { NULL, NULL, 0, 0, NULL, NULL, NULL }};
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ __libc_lock_unlock (lock);
+
+ result = internal_setpwent (&ent, 0, 0);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getpwuid_r (uid, pwd, &ent, buffer, buflen, errnop);
+
+ internal_endpwent (&ent);
+
+ return result;
+}
+
+
+/* Support routines for remembering -@netgroup and -user entries.
+ The names are stored in a single string with `|' as separator. */
+static void
+blacklist_store_name (const char *name, ent_t *ent)
+{
+ int namelen = strlen (name);
+ char *tmp;
+
+ /* first call, setup cache */
+ if (ent->blacklist.size == 0)
+ {
+ ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
+ ent->blacklist.data = malloc (ent->blacklist.size);
+ if (ent->blacklist.data == NULL)
+ return;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ ent->blacklist.current = 1;
+ }
+ else
+ {
+ if (in_blacklist (name, namelen, ent))
+ return; /* no duplicates */
+
+ if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
+ {
+ ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
+ tmp = realloc (ent->blacklist.data, ent->blacklist.size);
+ if (tmp == NULL)
+ {
+ free (ent->blacklist.data);
+ ent->blacklist.size = 0;
+ return;
+ }
+ ent->blacklist.data = tmp;
+ }
+ }
+
+ tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
+ *tmp++ = '|';
+ *tmp = '\0';
+ ent->blacklist.current += namelen + 1;
+
+ return;
+}
+
+/* Returns whether ent->blacklist contains name. */
+static bool
+in_blacklist (const char *name, int namelen, ent_t *ent)
+{
+ char buf[namelen + 3];
+ char *cp;
+
+ if (ent->blacklist.data == NULL)
+ return false;
+
+ buf[0] = '|';
+ cp = stpcpy (&buf[1], name);
+ *cp++ = '|';
+ *cp = '\0';
+ return strstr (ent->blacklist.data, buf) != NULL;
+}
Index: glibc-2.26/nss/nss_compat/compat-spwd.c
===================================================================
--- /dev/null
+++ glibc-2.26/nss/nss_compat/compat-spwd.c
@@ -0,0 +1,857 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <nss.h>
+#include <nsswitch.h>
+#include <shadow.h>
+#include <stdio_ext.h>
+#include <string.h>
+#include <libc-lock.h>
+#include <kernel-features.h>
+
+#include "netgroup.h"
+#include "nisdomain.h"
+
+static service_user *ni;
+static enum nss_status (*nss_setspent) (int stayopen);
+static enum nss_status (*nss_getspnam_r) (const char *name, struct spwd * sp,
+ char *buffer, size_t buflen,
+ int *errnop);
+static enum nss_status (*nss_getspent_r) (struct spwd * sp, char *buffer,
+ size_t buflen, int *errnop);
+static enum nss_status (*nss_endspent) (void);
+
+/* Get the declaration of the parser function. */
+#define ENTNAME spent
+#define STRUCTURE spwd
+#define EXTERN_PARSER
+#include <nss/nss_files/files-parse.c>
+
+/* Structure for remembering -@netgroup and -user members ... */
+#define BLACKLIST_INITIAL_SIZE 512
+#define BLACKLIST_INCREMENT 256
+struct blacklist_t
+{
+ char *data;
+ int current;
+ int size;
+};
+
+struct ent_t
+{
+ bool netgroup;
+ bool files;
+ bool first;
+ enum nss_status setent_status;
+ FILE *stream;
+ struct blacklist_t blacklist;
+ struct spwd pwd;
+ struct __netgrent netgrdata;
+};
+typedef struct ent_t ent_t;
+
+static ent_t ext_ent = { false, true, false, NSS_STATUS_SUCCESS, NULL,
+ { NULL, 0, 0},
+ { NULL, NULL, 0, 0, 0, 0, 0, 0, 0}};
+
+/* Protect global state against multiple changers. */
+__libc_lock_define_initialized (static, lock)
+
+/* Prototypes for local functions. */
+static void blacklist_store_name (const char *, ent_t *);
+static bool in_blacklist (const char *, int, ent_t *);
+
+/* Initialize the NSS interface/functions. The calling function must
+ hold the lock. */
+static void
+init_nss_interface (void)
+{
+ if (__nss_database_lookup ("shadow_compat", "passwd_compat",
+ "nis", &ni) >= 0)
+ {
+ nss_setspent = __nss_lookup_function (ni, "setspent");
+ nss_getspnam_r = __nss_lookup_function (ni, "getspnam_r");
+ nss_getspent_r = __nss_lookup_function (ni, "getspent_r");
+ nss_endspent = __nss_lookup_function (ni, "endspent");
+ }
+}
+
+static void
+give_spwd_free (struct spwd *pwd)
+{
+ free (pwd->sp_namp);
+ free (pwd->sp_pwdp);
+
+ memset (pwd, '\0', sizeof (struct spwd));
+ pwd->sp_warn = -1;
+ pwd->sp_inact = -1;
+ pwd->sp_expire = -1;
+ pwd->sp_flag = ~0ul;
+}
+
+static int
+spwd_need_buflen (struct spwd *pwd)
+{
+ int len = 0;
+
+ if (pwd->sp_pwdp != NULL)
+ len += strlen (pwd->sp_pwdp) + 1;
+
+ return len;
+}
+
+static void
+copy_spwd_changes (struct spwd *dest, struct spwd *src,
+ char *buffer, size_t buflen)
+{
+ if (src->sp_pwdp != NULL && strlen (src->sp_pwdp))
+ {
+ if (buffer == NULL)
+ dest->sp_pwdp = strdup (src->sp_pwdp);
+ else if (dest->sp_pwdp &&
+ strlen (dest->sp_pwdp) >= strlen (src->sp_pwdp))
+ strcpy (dest->sp_pwdp, src->sp_pwdp);
+ else
+ {
+ dest->sp_pwdp = buffer;
+ strcpy (dest->sp_pwdp, src->sp_pwdp);
+ buffer += strlen (dest->sp_pwdp) + 1;
+ buflen = buflen - (strlen (dest->sp_pwdp) + 1);
+ }
+ }
+ if (src->sp_lstchg != 0)
+ dest->sp_lstchg = src->sp_lstchg;
+ if (src->sp_min != 0)
+ dest->sp_min = src->sp_min;
+ if (src->sp_max != 0)
+ dest->sp_max = src->sp_max;
+ if (src->sp_warn != -1)
+ dest->sp_warn = src->sp_warn;
+ if (src->sp_inact != -1)
+ dest->sp_inact = src->sp_inact;
+ if (src->sp_expire != -1)
+ dest->sp_expire = src->sp_expire;
+ if (src->sp_flag != ~0ul)
+ dest->sp_flag = src->sp_flag;
+}
+
+static enum nss_status
+internal_setspent (ent_t *ent, int stayopen, int needent)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+
+ ent->first = ent->netgroup = 0;
+ ent->files = true;
+
+ /* If something was left over free it. */
+ if (ent->netgroup)
+ __internal_endnetgrent (&ent->netgrdata);
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ if (ent->stream == NULL)
+ {
+ ent->stream = fopen ("/etc/shadow", "rme");
+
+ if (ent->stream == NULL)
+ status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
+ else
+ /* We take care of locking ourself. */
+ __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
+ }
+ else
+ rewind (ent->stream);
+
+ give_spwd_free (&ent->pwd);
+
+ if (needent && status == NSS_STATUS_SUCCESS && nss_setspent)
+ ent->setent_status = nss_setspent (stayopen);
+
+ return status;
+}
+
+
+enum nss_status
+_nss_compat_setspent (int stayopen)
+{
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ result = internal_setspent (&ext_ent, stayopen, 1);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static enum nss_status
+internal_endspent (ent_t *ent)
+{
+ if (ent->stream != NULL)
+ {
+ fclose (ent->stream);
+ ent->stream = NULL;
+ }
+
+ if (ent->netgroup)
+ __internal_endnetgrent (&ent->netgrdata);
+
+ ent->first = ent->netgroup = false;
+ ent->files = true;
+
+ if (ent->blacklist.data != NULL)
+ {
+ ent->blacklist.current = 1;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ }
+ else
+ ent->blacklist.current = 0;
+
+ give_spwd_free (&ent->pwd);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_endspent (void)
+{
+ enum nss_status result;
+
+ __libc_lock_lock (lock);
+
+ if (nss_endspent)
+ nss_endspent ();
+
+ result = internal_endspent (&ext_ent);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static enum nss_status
+getspent_next_nss_netgr (const char *name, struct spwd *result, ent_t *ent,
+ char *group, char *buffer, size_t buflen,
+ int *errnop)
+{
+ char *curdomain = NULL, *host, *user, *domain, *p2;
+ size_t p2len;
+
+ if (!nss_getspnam_r)
+ return NSS_STATUS_UNAVAIL;
+
+ /* If the setpwent call failed, say so. */
+ if (ent->setent_status != NSS_STATUS_SUCCESS)
+ return ent->setent_status;
+
+ if (ent->first)
+ {
+ memset (&ent->netgrdata, 0, sizeof (struct __netgrent));
+ __internal_setnetgrent (group, &ent->netgrdata);
+ ent->first = false;
+ }
+
+ while (1)
+ {
+ enum nss_status status;
+
+ status = __internal_getnetgrent_r (&host, &user, &domain,
+ &ent->netgrdata, buffer, buflen,
+ errnop);
+ if (status != 1)
+ {
+ __internal_endnetgrent (&ent->netgrdata);
+ ent->netgroup = false;
+ give_spwd_free (&ent->pwd);
+ return NSS_STATUS_RETURN;
+ }
+
+ if (user == NULL || user[0] == '-')
+ continue;
+
+ if (domain != NULL)
+ {
+ if (curdomain == NULL
+ && __nss_get_default_domain (&curdomain) != 0)
+ {
+ __internal_endnetgrent (&ent->netgrdata);
+ ent->netgroup = false;
+ give_spwd_free (&ent->pwd);
+ return NSS_STATUS_UNAVAIL;
+ }
+ if (strcmp (curdomain, domain) != 0)
+ continue;
+ }
+
+ /* If name != NULL, we are called from getpwnam */
+ if (name != NULL)
+ if (strcmp (user, name) != 0)
+ continue;
+
+ p2len = spwd_need_buflen (&ent->pwd);
+ if (p2len > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p2 = buffer + (buflen - p2len);
+ buflen -= p2len;
+
+ if (nss_getspnam_r (user, result, buffer, buflen, errnop) !=
+ NSS_STATUS_SUCCESS)
+ continue;
+
+ if (!in_blacklist (result->sp_namp, strlen (result->sp_namp), ent))
+ {
+ /* Store the User in the blacklist for possible the "+" at the
+ end of /etc/passwd */
+ blacklist_store_name (result->sp_namp, ent);
+ copy_spwd_changes (result, &ent->pwd, p2, p2len);
+ break;
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+static enum nss_status
+getspent_next_nss (struct spwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ enum nss_status status;
+ char *p2;
+ size_t p2len;
+
+ if (!nss_getspent_r)
+ return NSS_STATUS_UNAVAIL;
+
+ p2len = spwd_need_buflen (&ent->pwd);
+ if (p2len > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ p2 = buffer + (buflen - p2len);
+ buflen -= p2len;
+ do
+ {
+ if ((status = nss_getspent_r (result, buffer, buflen, errnop)) !=
+ NSS_STATUS_SUCCESS)
+ return status;
+ }
+ while (in_blacklist (result->sp_namp, strlen (result->sp_namp), ent));
+
+ copy_spwd_changes (result, &ent->pwd, p2, p2len);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+/* This function handle the +user entrys in /etc/shadow */
+static enum nss_status
+getspnam_plususer (const char *name, struct spwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ if (!nss_getspnam_r)
+ return NSS_STATUS_UNAVAIL;
+
+ struct spwd pwd;
+ memset (&pwd, '\0', sizeof (struct spwd));
+ pwd.sp_warn = -1;
+ pwd.sp_inact = -1;
+ pwd.sp_expire = -1;
+ pwd.sp_flag = ~0ul;
+
+ copy_spwd_changes (&pwd, result, NULL, 0);
+
+ size_t plen = spwd_need_buflen (&pwd);
+ if (plen > buflen)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ char *p = buffer + (buflen - plen);
+ buflen -= plen;
+
+ enum nss_status status = nss_getspnam_r (name, result, buffer, buflen,
+ errnop);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+ if (in_blacklist (result->sp_namp, strlen (result->sp_namp), ent))
+ return NSS_STATUS_NOTFOUND;
+
+ copy_spwd_changes (result, &pwd, p, plen);
+ give_spwd_free (&pwd);
+ /* We found the entry. */
+ return NSS_STATUS_SUCCESS;
+}
+
+
+static enum nss_status
+getspent_next_file (struct spwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+ while (1)
+ {
+ fpos_t pos;
+ int parse_res = 0;
+ char *p;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ || !(parse_res = _nss_files_parse_spent (p, result, data,
+ buflen, errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-')
+ /* This is a real entry. */
+ break;
+
+ /* -@netgroup */
+ if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@'
+ && result->sp_namp[2] != '\0')
+ {
+ /* XXX Do not use fixed length buffers. */
+ char buf2[1024];
+ char *user, *host, *domain;
+ struct __netgrent netgrdata;
+
+ memset (&netgrdata, 0, sizeof (struct __netgrent));
+ __internal_setnetgrent (&result->sp_namp[2], &netgrdata);
+ while (__internal_getnetgrent_r (&host, &user, &domain,
+ &netgrdata, buf2, sizeof (buf2),
+ errnop))
+ {
+ if (user != NULL && user[0] != '-')
+ blacklist_store_name (user, ent);
+ }
+ __internal_endnetgrent (&netgrdata);
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@'
+ && result->sp_namp[2] != '\0')
+ {
+ int status;
+
+ ent->netgroup = true;
+ ent->first = true;
+ copy_spwd_changes (&ent->pwd, result, NULL, 0);
+
+ status = getspent_next_nss_netgr (NULL, result, ent,
+ &result->sp_namp[2],
+ buffer, buflen, errnop);
+ if (status == NSS_STATUS_RETURN)
+ continue;
+ else
+ return status;
+ }
+
+ /* -user */
+ if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0'
+ && result->sp_namp[1] != '@')
+ {
+ blacklist_store_name (&result->sp_namp[1], ent);
+ continue;
+ }
+
+ /* +user */
+ if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0'
+ && result->sp_namp[1] != '@')
+ {
+ size_t len = strlen (result->sp_namp);
+ char buf[len];
+ enum nss_status status;
+
+ /* Store the User in the blacklist for the "+" at the end of
+ /etc/passwd */
+ memcpy (buf, &result->sp_namp[1], len);
+ status = getspnam_plususer (&result->sp_namp[1], result, ent,
+ buffer, buflen, errnop);
+ blacklist_store_name (buf, ent);
+
+ if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
+ break;
+ /* We couldn't parse the entry */
+ else if (status == NSS_STATUS_RETURN
+ /* entry doesn't exist */
+ || status == NSS_STATUS_NOTFOUND)
+ continue;
+ else
+ {
+ if (status == NSS_STATUS_TRYAGAIN)
+ {
+ fsetpos (ent->stream, &pos);
+ *errnop = ERANGE;
+ }
+ return status;
+ }
+ }
+
+ /* +:... */
+ if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0')
+ {
+ ent->files = false;
+ ent->first = true;
+ copy_spwd_changes (&ent->pwd, result, NULL, 0);
+
+ return getspent_next_nss (result, ent, buffer, buflen, errnop);
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+static enum nss_status
+internal_getspent_r (struct spwd *pw, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ if (ent->netgroup)
+ {
+ enum nss_status status;
+
+ /* We are searching members in a netgroup */
+ /* Since this is not the first call, we don't need the group name */
+ status = getspent_next_nss_netgr (NULL, pw, ent, NULL, buffer,
+ buflen, errnop);
+
+ if (status == NSS_STATUS_RETURN)
+ return getspent_next_file (pw, ent, buffer, buflen, errnop);
+ else
+ return status;
+ }
+ else if (ent->files)
+ return getspent_next_file (pw, ent, buffer, buflen, errnop);
+ else
+ return getspent_next_nss (pw, ent, buffer, buflen, errnop);
+}
+
+
+enum nss_status
+_nss_compat_getspent_r (struct spwd *pwd, char *buffer, size_t buflen,
+ int *errnop)
+{
+ enum nss_status result = NSS_STATUS_SUCCESS;
+
+ __libc_lock_lock (lock);
+
+ /* Be prepared that the setpwent function was not called before. */
+ if (ni == NULL)
+ init_nss_interface ();
+
+ if (ext_ent.stream == NULL)
+ result = internal_setspent (&ext_ent, 1, 1);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getspent_r (pwd, &ext_ent, buffer, buflen, errnop);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
+static enum nss_status
+internal_getspnam_r (const char *name, struct spwd *result, ent_t *ent,
+ char *buffer, size_t buflen, int *errnop)
+{
+ struct parser_data *data = (void *) buffer;
+
+ while (1)
+ {
+ fpos_t pos;
+ char *p;
+ int parse_res;
+
+ do
+ {
+ /* We need at least 3 characters for one line. */
+ if (__glibc_unlikely (buflen < 3))
+ {
+ erange:
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ fgetpos (ent->stream, &pos);
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, ent->stream);
+ if (p == NULL && feof_unlocked (ent->stream))
+ return NSS_STATUS_NOTFOUND;
+
+ if (p == NULL || buffer[buflen - 1] != '\xff')
+ {
+ erange_reset:
+ fsetpos (ent->stream, &pos);
+ goto erange;
+ }
+
+ /* Terminate the line for any case. */
+ buffer[buflen - 1] = '\0';
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ }
+ while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ !(parse_res = _nss_files_parse_spent (p, result, data, buflen,
+ errnop)));
+
+ if (__glibc_unlikely (parse_res == -1))
+ /* The parser ran out of space. */
+ goto erange_reset;
+
+ /* This is a real entry. */
+ if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-')
+ {
+ if (strcmp (result->sp_namp, name) == 0)
+ return NSS_STATUS_SUCCESS;
+ else
+ continue;
+ }
+
+ /* -@netgroup */
+ /* If the loaded NSS module does not support this service, add
+ all users from a +@netgroup entry to the blacklist, too. */
+ if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@'
+ && result->sp_namp[2] != '\0')
+ {
+ if (innetgr (&result->sp_namp[2], NULL, name, NULL))
+ return NSS_STATUS_NOTFOUND;
+ continue;
+ }
+
+ /* +@netgroup */
+ if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@'
+ && result->sp_namp[2] != '\0')
+ {
+ enum nss_status status;
+
+ if (innetgr (&result->sp_namp[2], NULL, name, NULL))
+ {
+ status = getspnam_plususer (name, result, ent, buffer,
+ buflen, errnop);
+
+ if (status == NSS_STATUS_RETURN)
+ continue;
+
+ return status;
+ }
+ continue;
+ }
+
+ /* -user */
+ if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0'
+ && result->sp_namp[1] != '@')
+ {
+ if (strcmp (&result->sp_namp[1], name) == 0)
+ return NSS_STATUS_NOTFOUND;
+ else
+ continue;
+ }
+
+ /* +user */
+ if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0'
+ && result->sp_namp[1] != '@')
+ {
+ if (strcmp (name, &result->sp_namp[1]) == 0)
+ {
+ enum nss_status status;
+
+ status = getspnam_plususer (name, result, ent,
+ buffer, buflen, errnop);
+
+ if (status == NSS_STATUS_RETURN)
+ /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+
+ /* +:... */
+ if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0')
+ {
+ enum nss_status status;
+
+ status = getspnam_plususer (name, result, ent,
+ buffer, buflen, errnop);
+
+ if (status == NSS_STATUS_SUCCESS)
+ /* We found the entry. */
+ break;
+ else if (status == NSS_STATUS_RETURN)
+ /* We couldn't parse the entry */
+ return NSS_STATUS_NOTFOUND;
+ else
+ return status;
+ }
+ }
+ return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_compat_getspnam_r (const char *name, struct spwd *pwd,
+ char *buffer, size_t buflen, int *errnop)
+{
+ enum nss_status result;
+ ent_t ent = { false, true, false, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0},
+ { NULL, NULL, 0, 0, 0, 0, 0, 0, 0}};
+
+ if (name[0] == '-' || name[0] == '+')
+ return NSS_STATUS_NOTFOUND;
+
+ __libc_lock_lock (lock);
+
+ if (ni == NULL)
+ init_nss_interface ();
+
+ __libc_lock_unlock (lock);
+
+ result = internal_setspent (&ent, 0, 0);
+
+ if (result == NSS_STATUS_SUCCESS)
+ result = internal_getspnam_r (name, pwd, &ent, buffer, buflen, errnop);
+
+ internal_endspent (&ent);
+
+ return result;
+}
+
+
+/* Support routines for remembering -@netgroup and -user entries.
+ The names are stored in a single string with `|' as separator. */
+static void
+blacklist_store_name (const char *name, ent_t *ent)
+{
+ int namelen = strlen (name);
+ char *tmp;
+
+ /* first call, setup cache */
+ if (ent->blacklist.size == 0)
+ {
+ ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
+ ent->blacklist.data = malloc (ent->blacklist.size);
+ if (ent->blacklist.data == NULL)
+ return;
+ ent->blacklist.data[0] = '|';
+ ent->blacklist.data[1] = '\0';
+ ent->blacklist.current = 1;
+ }
+ else
+ {
+ if (in_blacklist (name, namelen, ent))
+ return; /* no duplicates */
+
+ if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
+ {
+ ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
+ tmp = realloc (ent->blacklist.data, ent->blacklist.size);
+ if (tmp == NULL)
+ {
+ free (ent->blacklist.data);
+ ent->blacklist.size = 0;
+ return;
+ }
+ ent->blacklist.data = tmp;
+ }
+ }
+
+ tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
+ *tmp++ = '|';
+ *tmp = '\0';
+ ent->blacklist.current += namelen + 1;
+
+ return;
+}
+
+
+/* Returns whether ent->blacklist contains name. */
+static bool
+in_blacklist (const char *name, int namelen, ent_t *ent)
+{
+ char buf[namelen + 3];
+ char *cp;
+
+ if (ent->blacklist.data == NULL)
+ return false;
+
+ buf[0] = '|';
+ cp = stpcpy (&buf[1], name);
+ *cp++ = '|';
+ *cp = '\0';
+ return strstr (ent->blacklist.data, buf) != NULL;
+}
Index: glibc-2.26/nss/nss_compat/nisdomain.c
===================================================================
--- /dev/null
+++ glibc-2.26/nss/nss_compat/nisdomain.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <libc-lock.h>
+#include "nisdomain.h"
+
+#define MAXDOMAINNAMELEN 1024
+
+static char domainname[MAXDOMAINNAMELEN];
+
+__libc_lock_define_initialized (static, domainname_lock)
+
+int
+__nss_get_default_domain (char **outdomain)
+{
+ int result = 0;
+ *outdomain = NULL;
+
+ __libc_lock_lock (domainname_lock);
+
+ if (domainname[0] != '\0')
+ {
+ if (getdomainname (domainname, MAXDOMAINNAMELEN) < 0)
+ result = errno;
+ else if (strcmp (domainname, "(none)") == 0)
+ {
+ /* If domainname is not set, some systems will return "(none)" */
+ domainname[0] = '\0';
+ result = ENOENT;
+ }
+ else
+ *outdomain = domainname;
+ }
+ else
+ *outdomain = domainname;
+
+ __libc_lock_unlock (domainname_lock);
+
+ return result;
+}
Index: glibc-2.26/nss/nss_compat/nisdomain.h
===================================================================
--- /dev/null
+++ glibc-2.26/nss/nss_compat/nisdomain.h
@@ -0,0 +1,20 @@
+/* Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Set OUTDOMAIN to a pointer to the current NIS domain name, or NULL if
+ not set. Return zero on success, an error number on failure. */
+extern int __nss_get_default_domain (char **outdomain);
