1 /* Copyright (C) 1999, 2000, 2001 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 Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
32 #include <sys/fcntl.h>
35 #include <sys/types.h>
40 #include "dl-procinfo.h"
43 # define LD_SO_CONF SYSCONFDIR "/ld.so.conf"
46 /* Get libc version number. */
49 #define PACKAGE _libc_intl_domainname
65 {"libc4", FLAG_LIBC4},
66 {"libc5", FLAG_ELF_LIBC5},
67 {"libc6", FLAG_ELF_LIBC6},
68 {"glibc2", FLAG_ELF_LIBC6}
72 /* List of directories to handle. */
77 struct dir_entry *next;
80 /* The list is unsorted, contains no duplicates. Entries are added at
82 static struct dir_entry *dir_entries;
84 /* Flags for different options. */
86 static int opt_print_cache = 0;
91 /* Format to support. */
92 /* 0: only libc5/glibc2; 1: both; 2: only glibc 2.2. */
96 static int opt_build_cache = 1;
99 static int opt_link = 1;
101 /* Only process directories specified on the command line. */
102 static int opt_only_cline = 0;
104 /* Path to root for chroot. */
105 static char *opt_chroot;
107 /* Manually link given shared libraries. */
108 static int opt_manual_link = 0;
110 /* Cache file to use. */
111 static char *cache_file;
113 /* Configuration file. */
114 static const char *config_file;
116 /* Name and version of program. */
117 static void print_version (FILE *stream, struct argp_state *state);
118 void (*argp_program_version_hook) (FILE *, struct argp_state *)
121 /* Definitions of arguments for argp functions. */
122 static const struct argp_option options[] =
124 { "print-cache", 'p', NULL, 0, N_("Print cache"), 0},
125 { "verbose", 'v', NULL, 0, N_("Generate verbose messages"), 0},
126 { NULL, 'N', NULL, 0, N_("Don't build cache"), 0},
127 { NULL, 'X', NULL, 0, N_("Don't generate links"), 0},
128 { NULL, 'r', "ROOT", 0, N_("Change to and use ROOT as root directory"), 0},
129 { NULL, 'C', "CACHE", 0, N_("Use CACHE as cache file"), 0},
130 { NULL, 'f', "CONF", 0, N_("Use CONF as configuration file"), 0},
131 { NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0},
132 { NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0},
133 { "format", 'c', "FORMAT", 0, N_("Format to use: new, old or compat (default)"), 0},
134 { NULL, 0, NULL, 0, NULL, 0 }
137 /* Short description of program. */
138 static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings.");
140 /* Prototype for option handler. */
141 static error_t parse_opt (int key, char *arg, struct argp_state *state);
143 /* Data structure to communicate with argp functions. */
144 static struct argp argp =
146 options, parse_opt, NULL, doc, NULL, NULL, NULL
149 /* Check if string corresponds to an important hardware capability or
152 is_hwcap_platform (const char *name)
154 int hwcap_idx = _dl_string_hwcap (name);
156 if (hwcap_idx != -1 && ((1 << hwcap_idx) & HWCAP_IMPORTANT))
159 hwcap_idx = _dl_string_platform (name);
166 /* Get hwcap (including platform) encoding of path. */
168 path_hwcap (const char *path)
170 char *str = xstrdup (path);
181 /* Search pathname from the end and check for hwcap strings. */
184 ptr = strrchr (str, '/');
189 h = _dl_string_hwcap (ptr + 1);
191 if (h == (uint64_t) -1)
193 h = _dl_string_platform (ptr + 1);
194 if (h == (uint64_t) -1)
199 /* Search the next part of the path. */
207 /* Handle program arguments. */
209 parse_opt (int key, char *arg, struct argp_state *state)
242 if (strcmp (arg, "old") == 0)
244 else if (strcmp (arg, "compat") == 0)
246 else if (strcmp (arg, "new") == 0)
250 return ARGP_ERR_UNKNOWN;
256 /* Print the version information. */
258 print_version (FILE *stream, struct argp_state *state)
260 fprintf (stream, "ldconfig (GNU %s) %s\n", PACKAGE, VERSION);
261 fprintf (stream, gettext ("\
262 Copyright (C) %s Free Software Foundation, Inc.\n\
263 This is free software; see the source for copying conditions. There is NO\n\
264 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
266 fprintf (stream, gettext ("Written by %s.\n"),
270 /* Add a single directory entry. */
272 add_single_dir (struct dir_entry *entry, int verbose)
274 struct dir_entry *ptr, *prev;
280 /* Check for duplicates. */
281 if (strcmp (ptr->path, entry->path) == 0)
283 if (opt_verbose && verbose)
284 error (0, 0, _("Path `%s' given more than once"), entry->path);
285 /* Use the newer information. */
286 ptr->flag = entry->flag;
293 /* Is this the first entry? */
294 if (ptr == NULL && dir_entries == NULL)
296 else if (ptr == NULL)
300 /* Add one directory to the list of directories to process. */
302 add_dir (const char *line)
305 struct dir_entry *entry;
308 entry = xmalloc (sizeof (struct dir_entry));
311 /* Search for an '=' sign. */
312 entry->path = xstrdup (line);
313 equal_sign = strchr (entry->path, '=');
318 entry->flag = FLAG_ANY;
319 for (i = 0; i < sizeof (lib_types) / sizeof (lib_types [0]); ++i)
320 if (strcmp (equal_sign, lib_types[i].name) == 0)
322 entry->flag = lib_types[i].flag;
325 if (entry->flag == FLAG_ANY)
326 error (0, 0, _("%s is not a known library type"), equal_sign);
330 entry->flag = FLAG_ANY;
333 /* Canonify path: for now only remove trailing slashes. */
334 i = strlen (entry->path) - 1;
335 while (entry->path[i] == '/' && i > 0)
337 entry->path [i] = '\0';
341 add_single_dir (entry, 1);
346 chroot_stat (const char *real_path, const char *path, struct stat64 *st)
352 return stat64 (real_path, st);
354 ret = lstat64 (real_path, st);
355 if (ret || !S_ISLNK (st->st_mode))
358 canon_path = chroot_canon (opt_chroot, path);
359 if (canon_path == NULL)
362 ret = stat64 (canon_path, st);
367 /* Create a symbolic link from soname to libname in directory path. */
369 create_links (const char *real_path, const char *path, const char *libname,
372 char *full_libname, *full_soname;
373 char *real_full_libname, *real_full_soname;
374 struct stat64 stat_lib, stat_so, lstat_so;
377 /* XXX: The logics in this function should be simplified. */
379 /* Get complete path. */
380 full_libname = alloca (strlen (path) + strlen (libname) + 2);
381 full_soname = alloca (strlen (path) + strlen (soname) + 2);
382 sprintf (full_libname, "%s/%s", path, libname);
383 sprintf (full_soname, "%s/%s", path, soname);
386 real_full_libname = alloca (strlen (real_path) + strlen (libname) + 2);
387 real_full_soname = alloca (strlen (real_path) + strlen (soname) + 2);
388 sprintf (real_full_libname, "%s/%s", real_path, libname);
389 sprintf (real_full_soname, "%s/%s", real_path, soname);
393 real_full_libname = full_libname;
394 real_full_soname = full_soname;
397 /* Does soname already exist and point to the right library? */
398 if (chroot_stat (real_full_soname, full_soname, &stat_so) == 0)
400 if (chroot_stat (real_full_libname, full_libname, &stat_lib))
402 error (0, 0, _("Can't stat %s\n"), full_libname);
405 if (stat_lib.st_dev == stat_so.st_dev
406 && stat_lib.st_ino == stat_so.st_ino)
407 /* Link is already correct. */
409 else if (lstat64 (full_soname, &lstat_so) == 0
410 && !S_ISLNK (lstat_so.st_mode))
412 error (0, 0, _("%s is not a symbolic link\n"), full_soname);
417 else if (lstat64 (real_full_soname, &lstat_so) != 0
418 || !S_ISLNK (lstat_so.st_mode))
419 /* Unless it is a stale symlink, there is no need to remove. */
423 printf ("\t%s -> %s", soname, libname);
425 if (do_link && opt_link)
427 /* Remove old link. */
429 if (unlink (real_full_soname))
431 error (0, 0, _("Can't unlink %s"), full_soname);
434 /* Create symbolic link. */
435 if (do_link && symlink (libname, real_full_soname))
437 error (0, 0, _("Can't link %s to %s"), full_soname, libname);
443 fputs (_(" (changed)\n"), stdout);
445 fputs (_(" (SKIPPED)\n"), stdout);
448 else if (opt_verbose)
449 fputs ("\n", stdout);
452 /* Manually link the given library. */
454 manual_link (char *library)
461 struct stat64 stat_buf;
464 /* Prepare arguments for create_links call. Split library name in
465 directory and filename first. Since path is allocated, we've got
466 to be careful to free at the end. */
467 path = xstrdup (library);
468 libname = strrchr (path, '/');
472 /* Successfully split names. Check if path is just "/" to avoid
476 libname = library + 1;
477 path = xrealloc (path, 2);
488 /* There's no path, construct one. */
490 path = xrealloc (path, 2);
496 real_path = chroot_canon (opt_chroot, path);
497 if (real_path == NULL)
499 error (0, errno, _("Can't find %s"), path);
503 real_library = alloca (strlen (real_path) + strlen (libname) + 2);
504 sprintf (real_library, "%s/%s", real_path, libname);
509 real_library = library;
512 /* Do some sanity checks first. */
513 if (lstat64 (real_library, &stat_buf))
515 error (0, errno, _("Can't lstat %s"), library);
519 /* We don't want links here! */
520 else if (!S_ISREG (stat_buf.st_mode))
522 error (0, 0, _("Ignored file %s since it is not a regular file."),
527 if (process_file (real_library, library, libname, &flag, &soname, 0))
529 error (0, 0, _("No link created since soname could not be found for %s"),
534 create_links (real_path, path, libname, soname);
540 /* Read a whole directory and search for libraries.
541 The purpose is two-fold:
542 - search for libraries which will be added to the cache
543 - create symbolic links to the soname for each library
545 This has to be done separatly for each directory.
547 To keep track of which libraries to add to the cache and which
548 links to create, we save a list of all libraries.
550 The algorithm is basically:
551 for all libraries in the directory do
552 get soname of library
553 if soname is already in list
554 if new library is newer, replace entry
555 otherwise ignore this library
556 otherwise add library to list
558 For example, if the two libraries libxy.so.1.1 and libxy.so.1.2
559 exist and both have the same soname, e.g. libxy.so, a symbolic link
560 is created from libxy.so.1.2 (the newer one) to libxy.so.
561 libxy.so.1.2 and libxy.so are added to the cache - but not
564 /* Information for one library. */
571 struct dlib_entry *next;
576 search_dir (const struct dir_entry *entry)
579 struct dirent *direntry;
580 char *file_name, *dir_name, *real_file_name, *real_name;
581 int file_name_len, real_file_name_len, len;
583 struct dlib_entry *dlibs;
584 struct dlib_entry *dlib_ptr;
585 struct stat64 stat_buf;
587 uint64_t hwcap = path_hwcap (entry->path);
589 file_name_len = PATH_MAX;
590 file_name = alloca (file_name_len);
597 printf ("%s: (hwcap: 0x%" PRIx64 ")\n", entry->path, hwcap);
599 printf ("%s:\n", entry->path);
604 dir_name = chroot_canon (opt_chroot, entry->path);
605 real_file_name_len = PATH_MAX;
606 real_file_name = alloca (real_file_name_len);
610 dir_name = entry->path;
611 real_file_name_len = 0;
612 real_file_name = file_name;
615 if (dir_name == NULL || (dir = opendir (dir_name)) == NULL)
618 error (0, errno, _("Can't open directory %s"), entry->path);
619 if (opt_chroot && dir_name)
624 while ((direntry = readdir (dir)) != NULL)
627 #ifdef _DIRENT_HAVE_D_TYPE
628 /* We only look at links and regular files. */
629 if (direntry->d_type != DT_UNKNOWN
630 && direntry->d_type != DT_LNK
631 && direntry->d_type != DT_REG
632 && direntry->d_type != DT_DIR)
634 #endif /* _DIRENT_HAVE_D_TYPE */
635 /* Does this file look like a shared library or is it a hwcap
636 subdirectory? The dynamic linker is also considered as
638 if (((strncmp (direntry->d_name, "lib", 3) != 0
639 && strncmp (direntry->d_name, "ld-", 3) != 0)
640 || strstr (direntry->d_name, ".so") == NULL)
641 && !is_hwcap_platform (direntry->d_name))
643 len = strlen (entry->path) + strlen (direntry->d_name);
644 if (len > file_name_len)
646 file_name_len = len + 1;
647 file_name = alloca (file_name_len);
649 real_file_name = file_name;
651 sprintf (file_name, "%s/%s", entry->path, direntry->d_name);
654 len = strlen (dir_name) + strlen (direntry->d_name);
655 if (len > real_file_name_len)
657 real_file_name_len = len + 1;
658 real_file_name = alloca (real_file_name_len);
660 sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name);
662 #ifdef _DIRENT_HAVE_D_TYPE
663 if (direntry->d_type != DT_UNKNOWN)
664 stat_buf.st_mode = DTTOIF (direntry->d_type);
667 if (lstat64 (real_file_name, &stat_buf))
669 error (0, errno, _("Can't lstat %s"), file_name);
673 if (S_ISDIR (stat_buf.st_mode) && is_hwcap_platform (direntry->d_name))
675 /* Handle subdirectory later. */
676 struct dir_entry *new_entry;
678 new_entry = xmalloc (sizeof (struct dir_entry));
679 new_entry->path = xstrdup (file_name);
680 new_entry->flag = entry->flag;
681 new_entry->next = NULL;
682 add_single_dir (new_entry, 0);
685 else if (!S_ISREG (stat_buf.st_mode) && !S_ISLNK (stat_buf.st_mode))
688 is_link = S_ISLNK (stat_buf.st_mode);
689 if (opt_chroot && is_link)
691 real_name = chroot_canon (opt_chroot, file_name);
692 if (real_name == NULL)
694 if (strstr (file_name, ".so") == NULL)
695 error (0, 0, _("Input file %s not found.\n"), file_name);
700 real_name = real_file_name;
702 if (process_file (real_name, file_name, direntry->d_name, &flag,
705 if (real_name != real_file_name)
710 if (real_name != real_file_name)
713 /* Links will just point to itself. */
717 soname = xstrdup (direntry->d_name);
721 && (entry->flag == FLAG_ELF_LIBC5
722 || entry->flag == FLAG_ELF_LIBC6))
724 /* Some sanity checks to print warnings. */
727 if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5
728 && entry->flag != FLAG_ANY)
729 error (0, 0, _("libc5 library %s in wrong directory"), file_name);
730 if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6
731 && entry->flag != FLAG_ANY)
732 error (0, 0, _("libc6 library %s in wrong directory"), file_name);
733 if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4
734 && entry->flag != FLAG_ANY)
735 error (0, 0, _("libc4 library %s in wrong directory"), file_name);
738 /* Add library to list. */
739 for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next)
741 /* Is soname already in list? */
742 if (strcmp (dlib_ptr->soname, soname) == 0)
744 /* Prefer a file to a link, otherwise check which one
746 if ((!is_link && dlib_ptr->is_link)
747 || (is_link == dlib_ptr->is_link
748 && _dl_cache_libcmp (dlib_ptr->name, direntry->d_name) < 0))
750 /* It's newer - add it. */
751 /* Flag should be the same - sanity check. */
752 if (dlib_ptr->flag != flag)
754 if (dlib_ptr->flag == FLAG_ELF
755 && (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6))
756 dlib_ptr->flag = flag;
757 else if ((dlib_ptr->flag == FLAG_ELF_LIBC5
758 || dlib_ptr->flag == FLAG_ELF_LIBC6)
760 dlib_ptr->flag = flag;
762 error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."),
763 dlib_ptr->name, direntry->d_name, entry->path);
765 free (dlib_ptr->name);
766 dlib_ptr->name = xstrdup (direntry->d_name);
767 dlib_ptr->is_link = is_link;
769 /* Don't add this library, abort loop. */
770 /* Also free soname, since it's dynamically allocated. */
775 /* Add the library if it's not already in. */
776 if (dlib_ptr == NULL)
778 dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry));
779 dlib_ptr->name = xstrdup (direntry->d_name);
780 dlib_ptr->flag = flag;
781 dlib_ptr->soname = soname;
782 dlib_ptr->is_link = is_link;
783 /* Add at head of list. */
784 dlib_ptr->next = dlibs;
791 /* Now dlibs contains a list of all libs - add those to the cache
792 and created all symbolic links. */
793 for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next)
795 /* Don't create links to links. */
796 if (dlib_ptr->is_link == 0)
797 create_links (dir_name, entry->path, dlib_ptr->name,
800 add_to_cache (entry->path, dlib_ptr->soname, dlib_ptr->flag, hwcap);
803 /* Free all resources. */
807 free (dlib_ptr->soname);
808 free (dlib_ptr->name);
813 if (opt_chroot && dir_name)
817 /* Search through all libraries. */
821 struct dir_entry *entry;
823 for (entry = dir_entries; entry != NULL; entry = entry->next)
826 /* Free all allocated memory. */
830 dir_entries = dir_entries->next;
837 /* Parse configuration file. */
839 parse_conf (const char *filename)
848 canon = chroot_canon (opt_chroot, filename);
850 file = fopen (canon, "r");
857 file = fopen (filename, "r");
862 error (0, errno, _("Can't open configuration file %s"), canon);
863 if (canon != filename)
864 free ((char *) canon);
868 if (canon != filename)
869 free ((char *) canon);
873 ssize_t n = getline (&line, &len, file);
877 if (line[n - 1] == '\n')
880 /* Because the file format does not know any form of quoting we
881 can search forward for the next '#' character and if found
882 make it terminating the line. */
883 *strchrnul (line, '#') = '\0';
885 /* If the line is blank it is ignored. */
890 } while (!feof (file));
892 /* Free buffer and close file. */
899 main (int argc, char **argv)
903 /* Parse and process arguments. */
904 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
906 /* Remaining arguments are additional libraries if opt_manual_link
908 if (remaining != argc && !opt_manual_link)
911 for (i = remaining; i < argc; ++i)
917 /* Normalize the path a bit, we might need it for printing later. */
918 char *endp = strchr (opt_chroot, '\0');
919 while (endp > opt_chroot && endp[-1] == '/')
922 if (endp == opt_chroot)
927 /* It is faster to use chroot if we can. */
928 if (!chroot (opt_chroot))
931 error (EXIT_FAILURE, errno, _("Can't chdir to /"));
937 if (cache_file == NULL)
939 cache_file = alloca (strlen (LD_SO_CACHE) + 1);
940 strcpy (cache_file, LD_SO_CACHE);
943 if (config_file == NULL)
944 config_file = LD_SO_CONF;
950 char *p = chroot_canon (opt_chroot, cache_file);
952 error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"),
956 print_cache (cache_file);
964 /* Canonicalize the directory name of cache_file, not cache_file,
965 because we'll rename a temporary cache file to it. */
966 char *p = strrchr (cache_file, '/');
967 char *canon = chroot_canon (opt_chroot,
968 p ? (*p = '\0', cache_file) : "/");
972 error (EXIT_FAILURE, errno,
973 _("Can't open cache file directory %s\n"),
974 p ? cache_file : "/");
982 cache_file = alloca (strlen (canon) + strlen (p) + 2);
983 sprintf (cache_file, "%s/%s", canon, p);
989 /* Link all given libraries manually. */
992 for (i = remaining; i < argc; ++i)
993 manual_link (argv [i]);
1002 if (!opt_only_cline)
1004 /* Always add the standard search paths. */
1006 if (strcmp (SLIBDIR, LIBDIR))
1009 parse_conf (config_file);
1014 if (opt_build_cache)
1015 save_cache (cache_file);