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File netkit-rsh-0.17-rexec-netrc.diff of Package rsh

--- rexec/Makefile
+++ rexec/Makefile
@@ -4,7 +4,7 @@
 include ../MRULES
 
 PROG=rexec
-OBJS=rexec.o
+OBJS=rexec.o ruserpass.o
 
 $(PROG): $(OBJS)
 	$(CC) $(LDFLAGS) $^ $(LIBS) -o $@
--- rexec/rexec.c
+++ rexec/rexec.c
@@ -99,6 +99,7 @@
 void set_signal(int sig, SIGHANDLER_T handler);
 void echo_sig(int sig);
 void safe_write_error(const char *message);
+int xruserpass(const char *host, char **aname, char **apass);
 
 /* These need to be global for signal passing. */
 int aux_sock=-1; /* Socket for auxiliary channel. */
@@ -163,7 +164,31 @@
   else /* else we just want standard error directed as standar out--no aux */
     p_to_aux_sock = NULL;
 
-  if (prompt || user_name == NULL || prompt == NULL)
+  if (!prompt)
+  {
+    if (user_name == NULL) //no user_name on command line
+      user_name = getenv("REXEC_USER");
+    if (user_name == NULL) { //try ~/.netrc file
+      if (xruserpass(host, &user_name, &passwd) < 0) {
+        user_name = NULL;
+        passwd = NULL;
+      } 
+    }
+    if ( user_name == NULL ) {
+      uid_t uid = getuid();
+      struct passwd *pw = getpwuid(uid);
+      if (!(pw && pw->pw_name)) {
+        fprintf(stderr, "Can't lookup uid %d\n", uid);
+       exit(1);
+      }
+      user_name = strdup(pw->pw_name);
+    }
+    if (user_name &&  (passwd == NULL))
+      passwd = getenv("REXEC_PASS");
+    if (user_name &&  (passwd == NULL))
+       passwd = getpass("Password: ");
+  }
+  if (prompt || user_name == NULL)
   {
     FILE *term_in,*term_out;
 
@@ -175,22 +200,18 @@
     else
       term_out = term_in;
 
-    if (prompt || user_name == NULL)
-      {
-	fprintf(term_out,"Username at %s: ",host);
-	user_name = fgets(user_buf,USERLEN,term_in);
-	user_name[strlen(user_name)-1] = '\0'; /* Hopefully fgets always adds
+    fprintf(term_out,"Username at %s: ",host);
+    user_name = fgets(user_buf,USERLEN,term_in);
+    user_name[strlen(user_name)-1] = '\0'; /* Hopefully fgets always adds
 						  a newline. */
-      }
-    if (prompt || passwd == NULL)
-      passwd = getpass("Password: ");
+    passwd = getpass("Password: ");
+  } 
+  if (!(user_name && passwd)) {
+    fprintf(stderr, "Can't use %s without supplying a user and password\n",
+       progname);
+    exit(1);
   }
 
-  if ( user_name == NULL )
-    user_name = getenv("REXEC_USER");
-  if ( passwd == NULL )
-    passwd = getenv("REXEC_PASS");
-
   if ( (sock = rexec_af (&host, port_exec, user_name, passwd, command,
 		     p_to_aux_sock, af)) < 0 )
   {
@@ -215,7 +236,7 @@
 
     if (bsd)
     {
-      for (sig = 0; sig < sizeof(bsd_signals)/sizeof(int); ++sig)
+      for (sig = 0; (unsigned) sig < sizeof(bsd_signals)/sizeof(int); ++sig)
 	set_signal(bsd_signals[sig],echo_sig);
     } else {
       for (sig = 1; sig < NSIG; ++sig)
--- rexec/ruserpass.c
+++ rexec/ruserpass.c
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 1985 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * from: @(#)ruserpass.c	5.3 (Berkeley) 3/1/91
+ */
+char ruserpass_rcsid[] = 
+  "$Id: ruserpass.c,v 1.9 1999/10/02 19:12:33 dholland Exp $";
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <utmp.h>
+#include <ctype.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+static FILE *cfile;
+static int token(void);
+
+#define MACBUF_LEN 4096
+
+#define	DEFAULT	1
+#define	LOGIN	2
+#define	PASSWD	3
+#define	ACCOUNT 4
+#define MACDEF  5
+#define	ID	10
+#define	MACH	11
+
+static char tokval[100];
+
+static struct toktab {
+	const char *tokstr;
+	int tval;
+} toktab[]= {
+	{ "default",	DEFAULT },
+	{ "login",	LOGIN },
+	{ "password",	PASSWD },
+	{ "passwd",	PASSWD },
+	{ "account",	ACCOUNT },
+	{ "machine",	MACH },
+	{ "macdef",	MACDEF },
+	{ NULL,		0 }
+};
+
+int
+xruserpass(const char *host, char **aname, char **apass)
+{
+	const char *hdir;
+	char buf[BUFSIZ], *tmp;
+	char myname[MAXHOSTNAMELEN];
+	const char *mydomain;
+	int t, usedefault = 0;
+	struct stat stb;
+
+	hdir = getenv("HOME");
+	if (hdir == NULL)
+		hdir = ".";
+	snprintf(buf, sizeof(buf), "%s/.netrc", hdir);
+	cfile = fopen(buf, "r");
+	if (cfile == NULL) {
+		if (errno != ENOENT)
+			perror(buf);
+		return(0);
+	}
+	if (gethostname(myname, sizeof(myname)) < 0)
+		myname[0] = '\0';
+	if ((mydomain = strchr(myname, '.')) == NULL)
+		mydomain = "";
+next:
+	while ((t = token())) switch(t) {
+
+	case DEFAULT:
+		usedefault = 1;
+		/* FALL THROUGH */
+
+	case MACH:
+		if (!usedefault) {
+			if (token() != ID)
+				continue;
+			/*
+			 * Allow match of incompletely-specified host in 
+			 * local domain.
+			 */
+			if (strcasecmp(host, tokval) == 0)
+				goto match;
+			if ((tmp = index(host, '.')) != NULL &&
+			    strcasecmp(tmp, mydomain) == 0 &&
+			    strncasecmp(host, tokval, tmp - host) == 0 &&
+			    tokval[tmp - host] == '\0')
+				goto match;
+			continue;
+		}
+	match:
+		while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
+
+		case LOGIN:
+			if (token()) {
+				if (*aname == 0) { 
+					*aname = malloc((unsigned) strlen(tokval) + 1);
+					(void) strcpy(*aname, tokval);
+				} else {
+					if (strcmp(*aname, tokval))
+						goto next;
+				}
+			}
+			break;
+		case PASSWD:
+			if (*aname==NULL) {
+	fprintf(stderr, "Error: `password' must follow `login' in .netrc\n");
+				goto bad;
+			}
+			if (strcmp(*aname, "anonymous") &&
+			    fstat(fileno(cfile), &stb) >= 0 &&
+			    (stb.st_mode & 077) != 0) {
+	fprintf(stderr, "Error - .netrc file not correct permissions.\n");
+	fprintf(stderr, "Remove password or correct mode (should be 600).\n");
+				goto bad;
+			}
+			if (token() && *apass == 0) {
+				*apass = malloc((unsigned) strlen(tokval) + 1);
+				(void) strcpy(*apass, tokval);
+			}
+			break;
+		case ACCOUNT:
+			break;
+		case MACDEF:
+			break;
+		default:
+	fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
+			break;
+		}
+		goto done;
+	}
+done:
+	(void) fclose(cfile);
+	return(0);
+bad:
+	(void) fclose(cfile);
+	return(-1);
+}
+
+static 
+int
+token(void)
+{
+	char *cp;
+	int c;
+	struct toktab *t;
+
+	if (feof(cfile))
+		return (0);
+	while ((c = getc(cfile)) != EOF &&
+	    (c == '\n' || c == '\t' || c == ' ' || c == ','))
+		continue;
+	if (c == EOF)
+		return (0);
+	cp = tokval;
+	if (c == '"') {
+		while ((c = getc(cfile)) != EOF && c != '"') {
+			if (c == '\\')
+				c = getc(cfile);
+			*cp++ = c;
+		}
+	} else {
+		*cp++ = c;
+		while ((c = getc(cfile)) != EOF
+		    && c != '\n' && c != '\t' && c != ' ' && c != ',') {
+			if (c == '\\')
+				c = getc(cfile);
+			*cp++ = c;
+		}
+	}
+	*cp = 0;
+	if (tokval[0] == 0)
+		return (0);
+	for (t = toktab; t->tokstr; t++)
+		if (!strcmp(t->tokstr, tokval))
+			return (t->tval);
+	return (ID);
+}