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SUSE:SLE-12:Update
glibc-utils.4899
glibc_post_upgrade.c
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File glibc_post_upgrade.c of Package glibc-utils.4899
/* skeleton based on version from Fedora Core 3 */ #define _GNU_SOURCE #include <sys/types.h> #include <sys/wait.h> #include <stdio.h> #include <errno.h> #include <unistd.h> #include <sys/time.h> #include <dirent.h> #include <stddef.h> #include <fcntl.h> #include <string.h> #include <sys/stat.h> #include <elf.h> #define verbose_exec(failcode, path...) \ do \ { \ char *const arr[] = { path, NULL }; \ vexec (failcode, arr); \ } while (0) __attribute__((noinline)) void vexec (int failcode, char *const path[]); __attribute__((noinline)) void says (const char *str); __attribute__((noinline)) void sayn (long num); __attribute__((noinline)) void message (char *const path[]); __attribute__((noinline)) int check_elf (const char *name); int main (void) { char initpath[256]; struct stat root, init_root; /* First, get rid of platform-optimized libraries. We remove any we have ever built, since otherwise we might end up using some old leftover libraries when new ones aren't installed in their place anymore. */ #ifdef REMOVE_TLS_DIRS const char *library[] = {"libc.so.6", "libc.so.6.1", "libm.so.6", "libm.so.6.1", "librt.so.1", "librtkaio.so.1", "libpthread.so.0", "libthread_db.so.1"}; const char *remove_dir[] = { #ifdef __i386__ "/lib/i686/", #endif #ifdef __powerpc64__ #ifdef REMOVE_PPC_OPTIMIZE_POWER4 "/lib64/power4/", "/lib64/ppc970/", #endif #ifdef REMOVE_PPC_OPTIMIZE_POWER5 "/lib64/power5/", "/lib64/power5+/", #endif #ifdef REMOVE_PPC_OPTIMIZE_POWER6 "/lib64/power6/", "/lib64/power6x/", #endif #ifdef REMOVE_PPC_OPTIMIZE_POWER7 "/lib64/power7/", #endif #ifdef REMOVE_PPC_OPTIMIZE_CELL "/lib64/ppc-cell-be/", #endif #endif /* __powerpc64__ */ #ifdef __powerpc__ #ifdef REMOVE_PPC_OPTIMIZE_POWER4 "/lib/power4/", "/lib/ppc970/", #endif #ifdef REMOVE_PPC_OPTIMIZE_POWER5 "/lib/power5/", "/lib/power5+/", #endif #ifdef REMOVE_PPC_OPTIMIZE_POWER6 "/lib/power6/", "/lib/power6x/", #endif #ifdef REMOVE_PPC_OPTIMIZE_POWER7 "/lib/power7/", #endif #ifdef REMOVE_PPC_OPTIMIZE_CELL "/lib/ppc-cell-be/", #endif #endif /* __powerpc__ */ LIBDIR"/tls/" }; int i, j; for (i = 0; i < sizeof (remove_dir) / sizeof (remove_dir[0]); ++i) for (j = 0; j < sizeof (library) / sizeof (library[0]); j++) { char buf[strlen (remove_dir[i]) + strlen (library[j]) + 1]; char readlink_buf[(strlen (remove_dir[i]) + strlen (library[j])) * 2 + 30]; ssize_t len; char *cp; cp = stpcpy (buf, remove_dir[i]); strcpy (cp, library[j]); /* This file could be a symlink to library-%{version}.so, so check this and don't remove only the link, but also the library itself. */ cp = stpcpy (readlink_buf, remove_dir[i]); if ((len = readlink (buf, cp, (sizeof (readlink_buf) - (cp - readlink_buf) - 1))) > 0) { cp[len] = '\0'; if (cp[0] != '/') cp = readlink_buf; unlink (cp); } unlink (buf); } #endif /* If installing bi-arch glibc, rpm sometimes doesn't unpack all files before running one of the lib's %post scriptlet. /sbin/ldconfig will then be run by the other arch's %post. */ if (access ("/sbin/ldconfig", X_OK) == 0) verbose_exec (110, "/sbin/ldconfig", "/sbin/ldconfig", "-X"); if (utimes (GCONV_MODULES_DIR "/gconv-modules.cache", NULL) == 0) { #ifndef ICONVCONFIG #define ICONVCONFIG "/usr/sbin/iconvconfig" #endif verbose_exec (113, ICONVCONFIG, "/usr/sbin/iconvconfig", "-o", GCONV_MODULES_DIR"/gconv-modules.cache", "--nostdlib", GCONV_MODULES_DIR); } /* Check if telinit is available and the init fifo as well. */ if (access ("/sbin/telinit", X_OK) || access ("/dev/initctl", F_OK)) _exit (0); /* Check if we are not inside of some chroot, because we'd just timeout and leave /etc/initrunlvl. */ if (readlink ("/proc/1/exe", initpath, 256) <= 0 || readlink ("/proc/1/root", initpath, 256) <= 0 || access ("/.buildenv", F_OK) == 0 || /* XEN build */ stat ("/proc/1/root", &init_root) < 0 || stat ("/", &root) < 0 || init_root.st_dev != root.st_dev || init_root.st_ino != root.st_ino) _exit (0); if (check_elf ("/proc/1/exe")) verbose_exec (116, "/sbin/telinit", "/sbin/telinit", "u"); #if 0 /* Check if we can safely condrestart sshd. */ if (access ("/sbin/service", X_OK) == 0 && access ("/usr/sbin/sshd", X_OK) == 0 && access ("/bin/bash", X_OK) == 0) { if (check_elf ("/usr/sbin/sshd")) verbose_exec (121, "/sbin/service", "/sbin/service", "sshd", "condrestart"); } #endif _exit(0); } void vexec (int failcode, char *const path[]) { pid_t pid; int status, save_errno; pid = vfork (); if (pid == 0) { execv (path[0], path + 1); save_errno = errno; message (path); says (" exec failed with errno "); sayn (save_errno); says ("\n"); _exit (failcode); } else if (pid < 0) { save_errno = errno; message (path); says (" fork failed with errno "); sayn (save_errno); says ("\n"); _exit (failcode + 1); } if (waitpid (0, &status, 0) != pid || !WIFEXITED (status)) { message (path); says (" child terminated abnormally\n"); _exit (failcode + 2); } if (WEXITSTATUS (status)) { message (path); says (" child exited with exit code "); sayn (WEXITSTATUS (status)); says ("\n"); _exit (WEXITSTATUS (status)); } } void says (const char *str) { write (1, str, strlen (str)); } void sayn (long num) { char string[sizeof (long) * 3 + 1]; char *p = string + sizeof (string) - 1; *p = '\0'; if (num == 0) *--p = '0'; else while (num) { *--p = '0' + num % 10; num = num / 10; } says (p); } void message (char *const path[]) { says ("/usr/sbin/glibc_post_upgrade: While trying to execute "); says (path[0]); } int check_elf (const char *name) { /* Play safe, if we can't open or read, assume it might be ELF for the current arch. */ int ret = 1; int fd = open (name, O_RDONLY); if (fd >= 0) { Elf32_Ehdr ehdr; if (read (fd, &ehdr, offsetof (Elf32_Ehdr, e_version)) == offsetof (Elf32_Ehdr, e_version)) { ret = 0; if (ehdr.e_ident[EI_CLASS] == (sizeof (long) == 8 ? ELFCLASS64 : ELFCLASS32)) { #if defined __i386__ ret = ehdr.e_machine == EM_386; #elif defined __x86_64__ ret = ehdr.e_machine == EM_X86_64; #elif defined __ia64__ ret = ehdr.e_machine == EM_IA_64; #elif defined __powerpc64__ ret = ehdr.e_machine == EM_PPC64; #elif defined __powerpc__ ret = ehdr.e_machine == EM_PPC; #elif defined __s390__ || defined __s390x__ ret = ehdr.e_machine == EM_S390; #elif defined __x86_64__ ret = ehdr.e_machine == EM_X86_64; #elif defined __sparc__ if (sizeof (long) == 8) ret = ehdr.e_machine == EM_SPARCV9; else ret = (ehdr.e_machine == EM_SPARC || ehdr.e_machine == EM_SPARC32PLUS); #else ret = 1; #endif } } close (fd); } return ret; } #ifdef SMALL_BINARY int __libc_multiple_threads __attribute__((nocommon)); int __libc_enable_asynccancel (void) { return 0; } void __libc_disable_asynccancel (int x) { } void __libc_csu_init (void) { } void __libc_csu_fini (void) { } pid_t __fork (void) { return -1; } char thr_buf[65536]; #ifndef __powerpc__ int __libc_start_main (int (*main) (void), int argc, char **argv, void (*init) (void), void (*fini) (void), void (*rtld_fini) (void), void * stack_end) #else struct startup_info { void *sda_base; int (*main) (int, char **, char **, void *); int (*init) (int, char **, char **, void *); void (*fini) (void); }; int __libc_start_main (int argc, char **ubp_av, char **ubp_ev, void *auxvec, void (*rtld_fini) (void), struct startup_info *stinfo, char **stack_on_entry) #endif { #if defined __ia64__ || defined __powerpc64__ register void *r13 __asm ("r13") = thr_buf + 32768; __asm ("" : : "r" (r13)); #elif defined __sparc__ register void *g6 __asm ("g6") = thr_buf + 32768; # ifdef __arch64__ __thread_self = thr_buf + 32768; # else register void *__thread_self __asm ("g7") = thr_buf + 32768; # endif __asm ("" : : "r" (g6), "r" (__thread_self)); #elif defined __s390__ && !defined __s390x__ __asm ("sar %%a0,%0" : : "d" (thr_buf + 32768)); #elif defined __s390x__ __asm ("sar %%a1,%0; srlg 0,%0,32; sar %%a0,0" : : "d" (thr_buf + 32768) : "0"); #elif defined __powerpc__ && !defined __powerpc64__ register void *r2 __asm ("r2") = thr_buf + 32768; __asm ("" : : "r" (r2)); #endif main(); return 0; } #endif
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