1 /* Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Andreas Jaeger <aj@suse.de>, 1999.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
29 #include <stdio_ext.h>
33 #include <sys/fcntl.h>
36 #include <sys/types.h>
41 #include "dl-procinfo.h"
44 # define LD_SO_CONF SYSCONFDIR "/ld.so.conf"
47 /* Get libc version number. */
50 #define PACKAGE _libc_intl_domainname
58 {"libc4", FLAG_LIBC4},
59 {"libc5", FLAG_ELF_LIBC5},
60 {"libc6", FLAG_ELF_LIBC6},
61 {"glibc2", FLAG_ELF_LIBC6}
65 /* List of directories to handle. */
72 struct dir_entry *next;
75 /* The list is unsorted, contains no duplicates. Entries are added at
77 static struct dir_entry *dir_entries;
79 /* Flags for different options. */
81 static int opt_print_cache;
86 /* Format to support. */
87 /* 0: only libc5/glibc2; 1: both; 2: only glibc 2.2. */
91 static int opt_build_cache = 1;
94 static int opt_link = 1;
96 /* Only process directories specified on the command line. */
97 static int opt_only_cline;
99 /* Path to root for chroot. */
100 static char *opt_chroot;
102 /* Manually link given shared libraries. */
103 static int opt_manual_link;
105 /* Cache file to use. */
106 static char *cache_file;
108 /* Configuration file. */
109 static const char *config_file;
111 /* Mask to use for important hardware capabilities. */
112 static unsigned long int hwcap_mask = HWCAP_IMPORTANT;
114 /* Name and version of program. */
115 static void print_version (FILE *stream, struct argp_state *state);
116 void (*argp_program_version_hook) (FILE *, struct argp_state *)
119 /* Definitions of arguments for argp functions. */
120 static const struct argp_option options[] =
122 { "print-cache", 'p', NULL, 0, N_("Print cache"), 0},
123 { "verbose", 'v', NULL, 0, N_("Generate verbose messages"), 0},
124 { NULL, 'N', NULL, 0, N_("Don't build cache"), 0},
125 { NULL, 'X', NULL, 0, N_("Don't generate links"), 0},
126 { NULL, 'r', "ROOT", 0, N_("Change to and use ROOT as root directory"), 0},
127 { NULL, 'C', "CACHE", 0, N_("Use CACHE as cache file"), 0},
128 { NULL, 'f', "CONF", 0, N_("Use CONF as configuration file"), 0},
129 { NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0},
130 { NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0},
131 { "format", 'c', "FORMAT", 0, N_("Format to use: new, old or compat (default)"), 0},
132 { NULL, 0, NULL, 0, NULL, 0 }
135 #define PROCINFO_CLASS static
136 #include <dl-procinfo.c>
138 /* Short description of program. */
139 static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings.");
141 /* Prototype for option handler. */
142 static error_t parse_opt (int key, char *arg, struct argp_state *state);
144 /* Data structure to communicate with argp functions. */
145 static struct argp argp =
147 options, parse_opt, NULL, doc, NULL, NULL, NULL
150 /* Check if string corresponds to an important hardware capability or
153 is_hwcap_platform (const char *name)
155 int hwcap_idx = _dl_string_hwcap (name);
157 if (hwcap_idx != -1 && ((1 << hwcap_idx) & hwcap_mask))
160 hwcap_idx = _dl_string_platform (name);
165 if (strcmp (name, "tls") == 0)
172 /* Get hwcap (including platform) encoding of path. */
174 path_hwcap (const char *path)
176 char *str = xstrdup (path);
187 /* Search pathname from the end and check for hwcap strings. */
190 ptr = strrchr (str, '/');
195 h = _dl_string_hwcap (ptr + 1);
197 if (h == (uint64_t) -1)
199 h = _dl_string_platform (ptr + 1);
200 if (h == (uint64_t) -1)
203 if (strcmp (ptr + 1, "tls") == 0)
212 /* Search the next part of the path. */
220 /* Handle program arguments. */
222 parse_opt (int key, char *arg, struct argp_state *state)
255 if (strcmp (arg, "old") == 0)
257 else if (strcmp (arg, "compat") == 0)
259 else if (strcmp (arg, "new") == 0)
263 return ARGP_ERR_UNKNOWN;
269 /* Print the version information. */
271 print_version (FILE *stream, struct argp_state *state)
273 fprintf (stream, "ldconfig (GNU %s) %s\n", PACKAGE, VERSION);
274 fprintf (stream, gettext ("\
275 Copyright (C) %s Free Software Foundation, Inc.\n\
276 This is free software; see the source for copying conditions. There is NO\n\
277 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
279 fprintf (stream, gettext ("Written by %s.\n"),
283 /* Add a single directory entry. */
285 add_single_dir (struct dir_entry *entry, int verbose)
287 struct dir_entry *ptr, *prev;
293 /* Check for duplicates. */
294 if (ptr->ino == entry->ino && ptr->dev == entry->dev)
296 if (opt_verbose && verbose)
297 error (0, 0, _("Path `%s' given more than once"), entry->path);
298 /* Use the newer information. */
299 ptr->flag = entry->flag;
307 /* Is this the first entry? */
308 if (ptr == NULL && dir_entries == NULL)
310 else if (ptr == NULL)
314 /* Add one directory to the list of directories to process. */
316 add_dir (const char *line)
319 struct dir_entry *entry;
321 struct stat64 stat_buf;
323 entry = xmalloc (sizeof (struct dir_entry));
326 /* Search for an '=' sign. */
327 entry->path = xstrdup (line);
328 equal_sign = strchr (entry->path, '=');
333 entry->flag = FLAG_ANY;
334 for (i = 0; i < sizeof (lib_types) / sizeof (lib_types[0]); ++i)
335 if (strcmp (equal_sign, lib_types[i].name) == 0)
337 entry->flag = lib_types[i].flag;
340 if (entry->flag == FLAG_ANY)
341 error (0, 0, _("%s is not a known library type"), equal_sign);
345 entry->flag = FLAG_ANY;
348 /* Canonify path: for now only remove leading and trailing
349 whitespace and the trailing slashes slashes. */
350 i = strlen (entry->path) - 1;
352 while (isspace (entry->path[i]) && i > 0)
353 entry->path[i--] = '\0';
355 while (entry->path[i] == '/' && i > 0)
356 entry->path[i--] = '\0';
358 if (stat64 (entry->path, &stat_buf))
361 error (0, errno, _("Can't stat %s"), entry->path);
367 entry->ino = stat_buf.st_ino;
368 entry->dev = stat_buf.st_dev;
370 add_single_dir (entry, 1);
375 chroot_stat (const char *real_path, const char *path, struct stat64 *st)
381 return stat64 (real_path, st);
383 ret = lstat64 (real_path, st);
384 if (ret || !S_ISLNK (st->st_mode))
387 canon_path = chroot_canon (opt_chroot, path);
388 if (canon_path == NULL)
391 ret = stat64 (canon_path, st);
396 /* Create a symbolic link from soname to libname in directory path. */
398 create_links (const char *real_path, const char *path, const char *libname,
401 char *full_libname, *full_soname;
402 char *real_full_libname, *real_full_soname;
403 struct stat64 stat_lib, stat_so, lstat_so;
406 /* XXX: The logics in this function should be simplified. */
408 /* Get complete path. */
409 full_libname = alloca (strlen (path) + strlen (libname) + 2);
410 full_soname = alloca (strlen (path) + strlen (soname) + 2);
411 sprintf (full_libname, "%s/%s", path, libname);
412 sprintf (full_soname, "%s/%s", path, soname);
415 real_full_libname = alloca (strlen (real_path) + strlen (libname) + 2);
416 real_full_soname = alloca (strlen (real_path) + strlen (soname) + 2);
417 sprintf (real_full_libname, "%s/%s", real_path, libname);
418 sprintf (real_full_soname, "%s/%s", real_path, soname);
422 real_full_libname = full_libname;
423 real_full_soname = full_soname;
426 /* Does soname already exist and point to the right library? */
427 if (chroot_stat (real_full_soname, full_soname, &stat_so) == 0)
429 if (chroot_stat (real_full_libname, full_libname, &stat_lib))
431 error (0, 0, _("Can't stat %s\n"), full_libname);
434 if (stat_lib.st_dev == stat_so.st_dev
435 && stat_lib.st_ino == stat_so.st_ino)
436 /* Link is already correct. */
438 else if (lstat64 (full_soname, &lstat_so) == 0
439 && !S_ISLNK (lstat_so.st_mode))
441 error (0, 0, _("%s is not a symbolic link\n"), full_soname);
446 else if (lstat64 (real_full_soname, &lstat_so) != 0
447 || !S_ISLNK (lstat_so.st_mode))
448 /* Unless it is a stale symlink, there is no need to remove. */
452 printf ("\t%s -> %s", soname, libname);
454 if (do_link && opt_link)
456 /* Remove old link. */
458 if (unlink (real_full_soname))
460 error (0, 0, _("Can't unlink %s"), full_soname);
463 /* Create symbolic link. */
464 if (do_link && symlink (libname, real_full_soname))
466 error (0, 0, _("Can't link %s to %s"), full_soname, libname);
472 fputs (_(" (changed)\n"), stdout);
474 fputs (_(" (SKIPPED)\n"), stdout);
477 else if (opt_verbose)
478 fputs ("\n", stdout);
481 /* Manually link the given library. */
483 manual_link (char *library)
490 struct stat64 stat_buf;
492 unsigned int osversion;
494 /* Prepare arguments for create_links call. Split library name in
495 directory and filename first. Since path is allocated, we've got
496 to be careful to free at the end. */
497 path = xstrdup (library);
498 libname = strrchr (path, '/');
502 /* Successfully split names. Check if path is just "/" to avoid
506 libname = library + 1;
507 path = xrealloc (path, 2);
518 /* There's no path, construct one. */
520 path = xrealloc (path, 2);
526 real_path = chroot_canon (opt_chroot, path);
527 if (real_path == NULL)
529 error (0, errno, _("Can't find %s"), path);
533 real_library = alloca (strlen (real_path) + strlen (libname) + 2);
534 sprintf (real_library, "%s/%s", real_path, libname);
539 real_library = library;
542 /* Do some sanity checks first. */
543 if (lstat64 (real_library, &stat_buf))
545 error (0, errno, _("Can't lstat %s"), library);
549 /* We don't want links here! */
550 else if (!S_ISREG (stat_buf.st_mode))
552 error (0, 0, _("Ignored file %s since it is not a regular file."),
557 if (process_file (real_library, library, libname, &flag, &osversion,
560 error (0, 0, _("No link created since soname could not be found for %s"),
565 create_links (real_path, path, libname, soname);
571 /* Read a whole directory and search for libraries.
572 The purpose is two-fold:
573 - search for libraries which will be added to the cache
574 - create symbolic links to the soname for each library
576 This has to be done separatly for each directory.
578 To keep track of which libraries to add to the cache and which
579 links to create, we save a list of all libraries.
581 The algorithm is basically:
582 for all libraries in the directory do
583 get soname of library
584 if soname is already in list
585 if new library is newer, replace entry
586 otherwise ignore this library
587 otherwise add library to list
589 For example, if the two libraries libxy.so.1.1 and libxy.so.1.2
590 exist and both have the same soname, e.g. libxy.so, a symbolic link
591 is created from libxy.so.1.2 (the newer one) to libxy.so.
592 libxy.so.1.2 and libxy.so are added to the cache - but not
595 /* Information for one library. */
602 unsigned int osversion;
603 struct dlib_entry *next;
608 search_dir (const struct dir_entry *entry)
611 struct dirent64 *direntry;
612 char *file_name, *dir_name, *real_file_name, *real_name;
613 int file_name_len, real_file_name_len, len;
615 struct dlib_entry *dlibs;
616 struct dlib_entry *dlib_ptr;
617 struct stat64 lstat_buf, stat_buf;
619 uint64_t hwcap = path_hwcap (entry->path);
620 unsigned int osversion;
622 file_name_len = PATH_MAX;
623 file_name = alloca (file_name_len);
630 printf ("%s: (hwcap: 0x%" PRIx64 ")\n", entry->path, hwcap);
632 printf ("%s:\n", entry->path);
637 dir_name = chroot_canon (opt_chroot, entry->path);
638 real_file_name_len = PATH_MAX;
639 real_file_name = alloca (real_file_name_len);
643 dir_name = entry->path;
644 real_file_name_len = 0;
645 real_file_name = file_name;
648 if (dir_name == NULL || (dir = opendir (dir_name)) == NULL)
651 error (0, errno, _("Can't open directory %s"), entry->path);
652 if (opt_chroot && dir_name)
657 while ((direntry = readdir64 (dir)) != NULL)
660 #ifdef _DIRENT_HAVE_D_TYPE
661 /* We only look at links and regular files. */
662 if (direntry->d_type != DT_UNKNOWN
663 && direntry->d_type != DT_LNK
664 && direntry->d_type != DT_REG
665 && direntry->d_type != DT_DIR)
667 #endif /* _DIRENT_HAVE_D_TYPE */
668 /* Does this file look like a shared library or is it a hwcap
669 subdirectory? The dynamic linker is also considered as
671 if (((strncmp (direntry->d_name, "lib", 3) != 0
672 && strncmp (direntry->d_name, "ld-", 3) != 0)
673 || strstr (direntry->d_name, ".so") == NULL)
675 #ifdef _DIRENT_HAVE_D_TYPE
676 direntry->d_type == DT_REG ||
678 !is_hwcap_platform (direntry->d_name)))
680 len = strlen (entry->path) + strlen (direntry->d_name);
681 if (len > file_name_len)
683 file_name_len = len + 1;
684 file_name = alloca (file_name_len);
686 real_file_name = file_name;
688 sprintf (file_name, "%s/%s", entry->path, direntry->d_name);
691 len = strlen (dir_name) + strlen (direntry->d_name);
692 if (len > real_file_name_len)
694 real_file_name_len = len + 1;
695 real_file_name = alloca (real_file_name_len);
697 sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name);
699 #ifdef _DIRENT_HAVE_D_TYPE
700 if (direntry->d_type != DT_UNKNOWN)
701 lstat_buf.st_mode = DTTOIF (direntry->d_type);
704 if (__builtin_expect (lstat64 (real_file_name, &lstat_buf), 0))
706 error (0, errno, _("Cannot lstat %s"), file_name);
710 is_link = S_ISLNK (lstat_buf.st_mode);
713 /* In case of symlink, we check if the symlink refers to
715 if (__builtin_expect (stat64 (real_file_name, &stat_buf), 0))
718 error (0, errno, _("Cannot stat %s"), file_name);
720 /* Remove stale symlinks. */
721 if (strstr (direntry->d_name, ".so."))
722 unlink (real_file_name);
725 is_dir = S_ISDIR (stat_buf.st_mode);
728 is_dir = S_ISDIR (lstat_buf.st_mode);
730 if (is_dir && is_hwcap_platform (direntry->d_name))
732 /* Handle subdirectory later. */
733 struct dir_entry *new_entry;
735 new_entry = xmalloc (sizeof (struct dir_entry));
736 new_entry->path = xstrdup (file_name);
737 new_entry->flag = entry->flag;
738 new_entry->next = NULL;
741 new_entry->ino = stat_buf.st_ino;
742 new_entry->dev = stat_buf.st_dev;
746 #ifdef _DIRENT_HAVE_D_TYPE
747 /* We have filled in lstat only #ifndef
748 _DIRENT_HAVE_D_TYPE. Fill it in if needed. */
749 if (direntry->d_type != DT_UNKNOWN
750 && __builtin_expect (lstat64 (real_file_name, &lstat_buf),
753 error (0, errno, _("Cannot lstat %s"), file_name);
754 free (new_entry->path);
760 new_entry->ino = lstat_buf.st_ino;
761 new_entry->dev = lstat_buf.st_dev;
763 add_single_dir (new_entry, 0);
766 else if (!S_ISREG (lstat_buf.st_mode) && !is_link)
769 if (opt_chroot && is_link)
771 real_name = chroot_canon (opt_chroot, file_name);
772 if (real_name == NULL)
774 if (strstr (file_name, ".so") == NULL)
775 error (0, 0, _("Input file %s not found.\n"), file_name);
780 real_name = real_file_name;
782 if (process_file (real_name, file_name, direntry->d_name, &flag,
783 &osversion, &soname, is_link))
785 if (real_name != real_file_name)
790 /* Links will just point to itself. */
794 soname = xstrdup (direntry->d_name);
797 if (real_name != real_file_name)
801 && (entry->flag == FLAG_ELF_LIBC5
802 || entry->flag == FLAG_ELF_LIBC6))
804 /* Some sanity checks to print warnings. */
807 if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5
808 && entry->flag != FLAG_ANY)
809 error (0, 0, _("libc5 library %s in wrong directory"), file_name);
810 if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6
811 && entry->flag != FLAG_ANY)
812 error (0, 0, _("libc6 library %s in wrong directory"), file_name);
813 if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4
814 && entry->flag != FLAG_ANY)
815 error (0, 0, _("libc4 library %s in wrong directory"), file_name);
818 /* Add library to list. */
819 for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next)
821 /* Is soname already in list? */
822 if (strcmp (dlib_ptr->soname, soname) == 0)
824 /* Prefer a file to a link, otherwise check which one
826 if ((!is_link && dlib_ptr->is_link)
827 || (is_link == dlib_ptr->is_link
828 && _dl_cache_libcmp (dlib_ptr->name, direntry->d_name) < 0))
830 /* It's newer - add it. */
831 /* Flag should be the same - sanity check. */
832 if (dlib_ptr->flag != flag)
834 if (dlib_ptr->flag == FLAG_ELF
835 && (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6))
836 dlib_ptr->flag = flag;
837 else if ((dlib_ptr->flag == FLAG_ELF_LIBC5
838 || dlib_ptr->flag == FLAG_ELF_LIBC6)
840 dlib_ptr->flag = flag;
842 error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."),
843 dlib_ptr->name, direntry->d_name, entry->path);
845 free (dlib_ptr->name);
846 dlib_ptr->osversion = osversion;
847 dlib_ptr->name = xstrdup (direntry->d_name);
848 dlib_ptr->is_link = is_link;
850 /* Don't add this library, abort loop. */
851 /* Also free soname, since it's dynamically allocated. */
856 /* Add the library if it's not already in. */
857 if (dlib_ptr == NULL)
859 dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry));
860 dlib_ptr->name = xstrdup (direntry->d_name);
861 dlib_ptr->flag = flag;
862 dlib_ptr->osversion = osversion;
863 dlib_ptr->soname = soname;
864 dlib_ptr->is_link = is_link;
865 /* Add at head of list. */
866 dlib_ptr->next = dlibs;
873 /* Now dlibs contains a list of all libs - add those to the cache
874 and created all symbolic links. */
875 for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next)
877 /* Don't create links to links. */
878 if (dlib_ptr->is_link == 0)
879 create_links (dir_name, entry->path, dlib_ptr->name,
882 add_to_cache (entry->path, dlib_ptr->soname, dlib_ptr->flag,
883 dlib_ptr->osversion, hwcap);
886 /* Free all resources. */
890 free (dlib_ptr->soname);
891 free (dlib_ptr->name);
896 if (opt_chroot && dir_name)
900 /* Search through all libraries. */
904 struct dir_entry *entry;
906 for (entry = dir_entries; entry != NULL; entry = entry->next)
909 /* Free all allocated memory. */
913 dir_entries = dir_entries->next;
920 /* Parse configuration file. */
922 parse_conf (const char *filename)
931 canon = chroot_canon (opt_chroot, filename);
933 file = fopen (canon, "r");
940 file = fopen (filename, "r");
945 error (0, errno, _("Can't open configuration file %s"), canon);
946 if (canon != filename)
947 free ((char *) canon);
951 /* No threads use this stream. */
952 __fsetlocking (file, FSETLOCKING_BYCALLER);
954 if (canon != filename)
955 free ((char *) canon);
959 ssize_t n = getline (&line, &len, file);
963 if (line[n - 1] == '\n')
966 /* Because the file format does not know any form of quoting we
967 can search forward for the next '#' character and if found
968 make it terminating the line. */
969 *strchrnul (line, '#') = '\0';
971 /* Remove leading whitespace. NUL is no whitespace character. */
973 while (isspace (*cp))
976 /* If the line is blank it is ignored. */
982 while (!feof_unlocked (file));
984 /* Free buffer and close file. */
989 /* Honour LD_HWCAP_MASK. */
993 char *mask = getenv ("LD_HWCAP_MASK");
996 hwcap_mask = strtoul (mask, NULL, 0);
1001 main (int argc, char **argv)
1005 /* Parse and process arguments. */
1006 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
1008 /* Remaining arguments are additional directories if opt_manual_link
1010 if (remaining != argc && !opt_manual_link)
1013 for (i = remaining; i < argc; ++i)
1014 if (opt_build_cache && argv[i][0] != '/')
1015 error (EXIT_FAILURE, 0,
1016 _("relative path `%s' used to build cache"),
1026 /* Normalize the path a bit, we might need it for printing later. */
1027 char *endp = strchr (opt_chroot, '\0');
1028 while (endp > opt_chroot && endp[-1] == '/')
1031 if (endp == opt_chroot)
1036 /* It is faster to use chroot if we can. */
1037 if (!chroot (opt_chroot))
1040 error (EXIT_FAILURE, errno, _("Can't chdir to /"));
1046 if (cache_file == NULL)
1048 cache_file = alloca (strlen (LD_SO_CACHE) + 1);
1049 strcpy (cache_file, LD_SO_CACHE);
1052 if (config_file == NULL)
1053 config_file = LD_SO_CONF;
1055 if (opt_print_cache)
1059 char *p = chroot_canon (opt_chroot, cache_file);
1061 error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"),
1065 print_cache (cache_file);
1073 /* Canonicalize the directory name of cache_file, not cache_file,
1074 because we'll rename a temporary cache file to it. */
1075 char *p = strrchr (cache_file, '/');
1076 char *canon = chroot_canon (opt_chroot,
1077 p ? (*p = '\0', cache_file) : "/");
1081 error (EXIT_FAILURE, errno,
1082 _("Can't open cache file directory %s\n"),
1083 p ? cache_file : "/");
1091 cache_file = alloca (strlen (canon) + strlen (p) + 2);
1092 sprintf (cache_file, "%s/%s", canon, p);
1096 if (opt_manual_link)
1098 /* Link all given libraries manually. */
1101 for (i = remaining; i < argc; ++i)
1102 manual_link (argv[i]);
1108 if (opt_build_cache)
1111 if (!opt_only_cline)
1113 parse_conf (config_file);
1115 /* Always add the standard search paths. */
1116 add_system_dir (SLIBDIR);
1117 if (strcmp (SLIBDIR, LIBDIR))
1118 add_system_dir (LIBDIR);
1123 if (opt_build_cache)
1124 save_cache (cache_file);