1 /* Copyright (C) 1999-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Andreas Jaeger <aj@suse.de>, 1999.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; version 2 of the License, or
8 (at your option) any later version.
10 This program 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
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <https://www.gnu.org/licenses/>. */
18 #define PROCINFO_CLASS static
31 #include <stdio_ext.h>
36 #include <sys/fcntl.h>
39 #include <sys/types.h>
45 #include <dl-hwcaps.h>
47 #include <dl-procinfo.h>
49 /* This subpath in search path entries is always supported and
50 included in the cache for backwards compatibility. */
51 #define TLS_SUBPATH "tls"
53 /* The MSB of the hwcap field is set for objects in TLS_SUBPATH
54 directories. There is always TLS support in glibc, so the dynamic
55 loader does not check the bit directly. But more hwcap bits make a
56 an object more preferred, so the bit still has meaning. */
57 #define TLS_HWCAP_BIT 63
60 # define LD_SO_CONF SYSCONFDIR "/ld.so.conf"
63 /* Get libc version number. */
66 #define PACKAGE _libc_intl_domainname
74 {"libc4", FLAG_LIBC4
},
75 {"libc5", FLAG_ELF_LIBC5
},
76 {"libc6", FLAG_ELF_LIBC6
},
77 {"glibc2", FLAG_ELF_LIBC6
}
81 /* List of directories to handle. */
88 const char *from_file
;
91 /* Non-NULL for subdirectories under a glibc-hwcaps subdirectory. */
92 struct glibc_hwcaps_subdirectory
*hwcaps
;
94 struct dir_entry
*next
;
97 /* The list is unsorted, contains no duplicates. Entries are added at
99 static struct dir_entry
*dir_entries
;
101 /* Flags for different options. */
103 static int opt_print_cache
;
108 /* Format to support. */
109 enum opt_format opt_format
= opt_format_new
;
112 static int opt_build_cache
= 1;
114 /* Enable symbolic link processing. If set, create or update symbolic
115 links, and remove stale symbolic links. */
116 static int opt_link
= 1;
118 /* Only process directories specified on the command line. */
119 static int opt_only_cline
;
121 /* Path to root for chroot. */
122 static char *opt_chroot
;
124 /* Manually link given shared libraries. */
125 static int opt_manual_link
;
127 /* Should we ignore an old auxiliary cache file? */
128 static int opt_ignore_aux_cache
;
130 /* Cache file to use. */
131 static char *cache_file
;
133 /* Configuration file. */
134 static const char *config_file
;
136 /* Mask to use for important hardware capabilities. */
137 static unsigned long int hwcap_mask
= HWCAP_IMPORTANT
;
139 /* Name and version of program. */
140 static void print_version (FILE *stream
, struct argp_state
*state
);
141 void (*argp_program_version_hook
) (FILE *, struct argp_state
*)
144 /* Function to print some extra text in the help message. */
145 static char *more_help (int key
, const char *text
, void *input
);
147 /* Definitions of arguments for argp functions. */
148 static const struct argp_option options
[] =
150 { "print-cache", 'p', NULL
, 0, N_("Print cache"), 0},
151 { "verbose", 'v', NULL
, 0, N_("Generate verbose messages"), 0},
152 { NULL
, 'N', NULL
, 0, N_("Don't build cache"), 0},
153 { NULL
, 'X', NULL
, 0, N_("Don't update symbolic links"), 0},
154 { NULL
, 'r', N_("ROOT"), 0, N_("Change to and use ROOT as root directory"), 0},
155 { NULL
, 'C', N_("CACHE"), 0, N_("Use CACHE as cache file"), 0},
156 { NULL
, 'f', N_("CONF"), 0, N_("Use CONF as configuration file"), 0},
157 { NULL
, 'n', NULL
, 0, N_("Only process directories specified on the command line. Don't build cache."), 0},
158 { NULL
, 'l', NULL
, 0, N_("Manually link individual libraries."), 0},
159 { "format", 'c', N_("FORMAT"), 0, N_("Format to use: new (default), old, or compat"), 0},
160 { "ignore-aux-cache", 'i', NULL
, 0, N_("Ignore auxiliary cache file"), 0},
161 { NULL
, 0, NULL
, 0, NULL
, 0 }
164 #define PROCINFO_CLASS static
165 #include <dl-procinfo.c>
167 /* Short description of program. */
168 static const char doc
[] = N_("Configure Dynamic Linker Run Time Bindings.");
170 /* Prototype for option handler. */
171 static error_t
parse_opt (int key
, char *arg
, struct argp_state
*state
);
173 /* Data structure to communicate with argp functions. */
174 static struct argp argp
=
176 options
, parse_opt
, NULL
, doc
, NULL
, more_help
, NULL
179 /* Check if string corresponds to an important hardware capability or
182 is_hwcap_platform (const char *name
)
184 int hwcap_idx
= _dl_string_hwcap (name
);
186 /* Is this a normal hwcap for the machine like "fpu?" */
187 if (hwcap_idx
!= -1 && ((1 << hwcap_idx
) & hwcap_mask
))
190 /* Is this a platform pseudo-hwcap like "i686?" */
191 hwcap_idx
= _dl_string_platform (name
);
195 /* Backwards-compatibility for the "tls" subdirectory. */
196 if (strcmp (name
, TLS_SUBPATH
) == 0)
202 /* Get hwcap (including platform) encoding of path. */
204 path_hwcap (const char *path
)
206 char *str
= xstrdup (path
);
217 /* Search pathname from the end and check for hwcap strings. */
220 ptr
= strrchr (str
, '/');
225 h
= _dl_string_hwcap (ptr
+ 1);
227 if (h
== (uint64_t) -1)
229 h
= _dl_string_platform (ptr
+ 1);
230 if (h
== (uint64_t) -1)
232 if (strcmp (ptr
+ 1, TLS_SUBPATH
) == 0)
240 /* Search the next part of the path. */
248 /* Handle program arguments. */
250 parse_opt (int key
, char *arg
, struct argp_state
*state
)
256 /* Ignore auxiliary cache since we use non-standard cache. */
257 opt_ignore_aux_cache
= 1;
263 opt_ignore_aux_cache
= 1;
288 if (strcmp (arg
, "old") == 0)
289 opt_format
= opt_format_old
;
290 else if (strcmp (arg
, "compat") == 0)
291 opt_format
= opt_format_compat
;
292 else if (strcmp (arg
, "new") == 0)
293 opt_format
= opt_format_new
;
296 return ARGP_ERR_UNKNOWN
;
302 /* Print bug-reporting information in the help message. */
304 more_help (int key
, const char *text
, void *input
)
309 case ARGP_KEY_HELP_EXTRA
:
310 /* We print some extra information. */
311 if (asprintf (&tp
, gettext ("\
312 For bug reporting instructions, please see:\n\
313 %s.\n"), REPORT_BUGS_TO
) < 0)
319 return (char *) text
;
322 /* Print the version information. */
324 print_version (FILE *stream
, struct argp_state
*state
)
326 fprintf (stream
, "ldconfig %s%s\n", PKGVERSION
, VERSION
);
327 fprintf (stream
, gettext ("\
328 Copyright (C) %s Free Software Foundation, Inc.\n\
329 This is free software; see the source for copying conditions. There is NO\n\
330 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
332 fprintf (stream
, gettext ("Written by %s.\n"),
336 /* Allocate a new subdirectory with full path PATH under ENTRY, using
337 inode data from *ST. */
338 static struct dir_entry
*
339 new_sub_entry (const struct dir_entry
*entry
, const char *path
,
340 const struct stat64
*st
)
342 struct dir_entry
*new_entry
= xmalloc (sizeof (struct dir_entry
));
343 new_entry
->from_file
= entry
->from_file
;
344 new_entry
->from_line
= entry
->from_line
;
345 new_entry
->path
= xstrdup (path
);
346 new_entry
->flag
= entry
->flag
;
347 new_entry
->hwcaps
= NULL
;
348 new_entry
->next
= NULL
;
349 new_entry
->ino
= st
->st_ino
;
350 new_entry
->dev
= st
->st_dev
;
354 /* Add a single directory entry. Return true if the directory is
355 actually added (because it is not a duplicate). */
357 add_single_dir (struct dir_entry
*entry
, int verbose
)
359 struct dir_entry
*ptr
, *prev
;
366 /* Check for duplicates. */
367 if (ptr
->ino
== entry
->ino
&& ptr
->dev
== entry
->dev
)
369 if (opt_verbose
&& verbose
)
371 error (0, 0, _("Path `%s' given more than once"), entry
->path
);
372 fprintf (stderr
, _("(from %s:%d and %s:%d)\n"),
373 entry
->from_file
, entry
->from_line
,
374 ptr
->from_file
, ptr
->from_line
);
376 /* Use the newer information. */
377 ptr
->flag
= entry
->flag
;
386 /* Is this the first entry? */
387 if (ptr
== NULL
&& dir_entries
== NULL
)
389 else if (ptr
== NULL
)
394 /* Check if PATH contains a "glibc-hwcaps" subdirectory. If so, queue
395 its subdirectories for glibc-hwcaps processing. */
397 add_glibc_hwcaps_subdirectories (struct dir_entry
*entry
, const char *path
)
399 /* glibc-hwcaps subdirectories do not nest. */
400 assert (entry
->hwcaps
== NULL
);
403 if (asprintf (&glibc_hwcaps
, "%s/" GLIBC_HWCAPS_SUBDIRECTORY
, path
) < 0)
404 error (EXIT_FAILURE
, errno
, _("Could not form glibc-hwcaps path"));
406 DIR *dir
= opendir (glibc_hwcaps
);
412 struct dirent64
*e
= readdir64 (dir
);
418 error (EXIT_FAILURE
, errno
, _("Listing directory %s"), path
);
421 /* Ignore hidden subdirectories, including "." and "..", and
422 regular files. File names containing a ':' cannot be
423 looked up by the dynamic loader, so skip those as
425 if (e
->d_name
[0] == '.' || e
->d_type
== DT_REG
426 || strchr (e
->d_name
, ':') != NULL
)
429 /* See if this entry eventually resolves to a directory. */
431 if (fstatat64 (dirfd (dir
), e
->d_name
, &st
, 0) < 0)
432 /* Ignore unreadable entries. */
435 if (S_ISDIR (st
.st_mode
))
437 /* This is a directory, so it needs to be scanned for
438 libraries, associated with the hwcaps implied by the
439 subdirectory name. */
441 if (asprintf (&new_path
, "%s/" GLIBC_HWCAPS_SUBDIRECTORY
"/%s",
442 /* Use non-canonicalized path here. */
443 entry
->path
, e
->d_name
) < 0)
444 error (EXIT_FAILURE
, errno
,
445 _("Could not form glibc-hwcaps path"));
446 struct dir_entry
*new_entry
= new_sub_entry (entry
, new_path
,
449 new_entry
->hwcaps
= new_glibc_hwcaps_subdirectory (e
->d_name
);
450 add_single_dir (new_entry
, 0);
460 /* Add one directory to the list of directories to process. */
462 add_dir_1 (const char *line
, const char *from_file
, int from_line
)
465 struct dir_entry
*entry
= xmalloc (sizeof (struct dir_entry
));
466 entry
->hwcaps
= NULL
;
469 entry
->from_file
= strdup (from_file
);
470 entry
->from_line
= from_line
;
472 /* Search for an '=' sign. */
473 entry
->path
= xstrdup (line
);
474 char *equal_sign
= strchr (entry
->path
, '=');
479 entry
->flag
= FLAG_ANY
;
480 for (i
= 0; i
< sizeof (lib_types
) / sizeof (lib_types
[0]); ++i
)
481 if (strcmp (equal_sign
, lib_types
[i
].name
) == 0)
483 entry
->flag
= lib_types
[i
].flag
;
486 if (entry
->flag
== FLAG_ANY
)
487 error (0, 0, _("%s is not a known library type"), equal_sign
);
491 entry
->flag
= FLAG_ANY
;
494 /* Canonify path: for now only remove leading and trailing
495 whitespace and the trailing slashes. */
496 i
= strlen (entry
->path
);
498 while (i
> 0 && isspace (entry
->path
[i
- 1]))
499 entry
->path
[--i
] = '\0';
501 while (i
> 0 && entry
->path
[i
- 1] == '/')
502 entry
->path
[--i
] = '\0';
507 char *path
= entry
->path
;
509 path
= chroot_canon (opt_chroot
, path
);
511 struct stat64 stat_buf
;
512 if (path
== NULL
|| stat64 (path
, &stat_buf
))
515 error (0, errno
, _("Can't stat %s"), entry
->path
);
521 entry
->ino
= stat_buf
.st_ino
;
522 entry
->dev
= stat_buf
.st_dev
;
524 if (add_single_dir (entry
, 1))
525 /* Add glibc-hwcaps subdirectories if present. */
526 add_glibc_hwcaps_subdirectories (entry
, path
);
534 add_dir (const char *line
)
536 add_dir_1 (line
, "<builtin>", 0);
540 chroot_stat (const char *real_path
, const char *path
, struct stat64
*st
)
546 return stat64 (real_path
, st
);
548 ret
= lstat64 (real_path
, st
);
549 if (ret
|| !S_ISLNK (st
->st_mode
))
552 canon_path
= chroot_canon (opt_chroot
, path
);
553 if (canon_path
== NULL
)
556 ret
= stat64 (canon_path
, st
);
561 /* Create a symbolic link from soname to libname in directory path. */
563 create_links (const char *real_path
, const char *path
, const char *libname
,
566 char *full_libname
, *full_soname
;
567 char *real_full_libname
, *real_full_soname
;
568 struct stat64 stat_lib
, stat_so
, lstat_so
;
571 /* XXX: The logics in this function should be simplified. */
573 /* Get complete path. */
574 full_libname
= alloca (strlen (path
) + strlen (libname
) + 2);
575 full_soname
= alloca (strlen (path
) + strlen (soname
) + 2);
576 sprintf (full_libname
, "%s/%s", path
, libname
);
577 sprintf (full_soname
, "%s/%s", path
, soname
);
580 real_full_libname
= alloca (strlen (real_path
) + strlen (libname
) + 2);
581 real_full_soname
= alloca (strlen (real_path
) + strlen (soname
) + 2);
582 sprintf (real_full_libname
, "%s/%s", real_path
, libname
);
583 sprintf (real_full_soname
, "%s/%s", real_path
, soname
);
587 real_full_libname
= full_libname
;
588 real_full_soname
= full_soname
;
591 /* Does soname already exist and point to the right library? */
592 if (chroot_stat (real_full_soname
, full_soname
, &stat_so
) == 0)
594 if (chroot_stat (real_full_libname
, full_libname
, &stat_lib
))
596 error (0, 0, _("Can't stat %s\n"), full_libname
);
599 if (stat_lib
.st_dev
== stat_so
.st_dev
600 && stat_lib
.st_ino
== stat_so
.st_ino
)
601 /* Link is already correct. */
603 else if (lstat64 (full_soname
, &lstat_so
) == 0
604 && !S_ISLNK (lstat_so
.st_mode
))
606 error (0, 0, _("%s is not a symbolic link\n"), full_soname
);
611 else if (lstat64 (real_full_soname
, &lstat_so
) != 0
612 || !S_ISLNK (lstat_so
.st_mode
))
613 /* Unless it is a stale symlink, there is no need to remove. */
617 printf ("\t%s -> %s", soname
, libname
);
619 if (do_link
&& opt_link
)
621 /* Remove old link. */
623 if (unlink (real_full_soname
))
625 error (0, 0, _("Can't unlink %s"), full_soname
);
628 /* Create symbolic link. */
629 if (do_link
&& symlink (libname
, real_full_soname
))
631 error (0, 0, _("Can't link %s to %s"), full_soname
, libname
);
637 fputs (_(" (changed)\n"), stdout
);
639 fputs (_(" (SKIPPED)\n"), stdout
);
642 else if (opt_verbose
)
643 fputs ("\n", stdout
);
646 /* Manually link the given library. */
648 manual_link (char *library
)
655 struct stat64 stat_buf
;
657 unsigned int osversion
;
658 unsigned int isa_level
;
660 /* Prepare arguments for create_links call. Split library name in
661 directory and filename first. Since path is allocated, we've got
662 to be careful to free at the end. */
663 path
= xstrdup (library
);
664 libname
= strrchr (path
, '/');
668 /* Successfully split names. Check if path is just "/" to avoid
672 libname
= library
+ 1;
673 path
= xrealloc (path
, 2);
684 /* There's no path, construct one. */
686 path
= xrealloc (path
, 2);
692 real_path
= chroot_canon (opt_chroot
, path
);
693 if (real_path
== NULL
)
695 error (0, errno
, _("Can't find %s"), path
);
699 real_library
= alloca (strlen (real_path
) + strlen (libname
) + 2);
700 sprintf (real_library
, "%s/%s", real_path
, libname
);
705 real_library
= library
;
708 /* Do some sanity checks first. */
709 if (lstat64 (real_library
, &stat_buf
))
711 error (0, errno
, _("Cannot lstat %s"), library
);
715 /* We don't want links here! */
716 else if (!S_ISREG (stat_buf
.st_mode
))
718 error (0, 0, _("Ignored file %s since it is not a regular file."),
724 if (process_file (real_library
, library
, libname
, &flag
, &osversion
,
725 &isa_level
, &soname
, 0, &stat_buf
))
727 error (0, 0, _("No link created since soname could not be found for %s"),
733 soname
= implicit_soname (libname
, flag
);
734 create_links (real_path
, path
, libname
, soname
);
740 /* Read a whole directory and search for libraries.
741 The purpose is two-fold:
742 - search for libraries which will be added to the cache
743 - create symbolic links to the soname for each library
745 This has to be done separatly for each directory.
747 To keep track of which libraries to add to the cache and which
748 links to create, we save a list of all libraries.
750 The algorithm is basically:
751 for all libraries in the directory do
752 get soname of library
753 if soname is already in list
754 if new library is newer, replace entry
755 otherwise ignore this library
756 otherwise add library to list
758 For example, if the two libraries libxy.so.1.1 and libxy.so.1.2
759 exist and both have the same soname, e.g. libxy.so, a symbolic link
760 is created from libxy.so.1.2 (the newer one) to libxy.so.
761 libxy.so.1.2 and libxy.so are added to the cache - but not
764 /* Information for one library. */
771 unsigned int osversion
;
772 unsigned int isa_level
;
773 struct dlib_entry
*next
;
778 search_dir (const struct dir_entry
*entry
)
781 if (entry
->hwcaps
== NULL
)
783 hwcap
= path_hwcap (entry
->path
);
787 printf ("%s: (hwcap: %#.16" PRIx64
")", entry
->path
, hwcap
);
789 printf ("%s:", entry
->path
);
796 printf ("%s: (hwcap: \"%s\")", entry
->path
,
797 glibc_hwcaps_subdirectory_name (entry
->hwcaps
));
800 printf (_(" (from %s:%d)\n"), entry
->from_file
, entry
->from_line
);
803 char *real_file_name
;
804 size_t real_file_name_len
;
805 size_t file_name_len
= PATH_MAX
;
806 char *file_name
= alloca (file_name_len
);
809 dir_name
= chroot_canon (opt_chroot
, entry
->path
);
810 real_file_name_len
= PATH_MAX
;
811 real_file_name
= alloca (real_file_name_len
);
815 dir_name
= entry
->path
;
816 real_file_name_len
= 0;
817 real_file_name
= file_name
;
821 if (dir_name
== NULL
|| (dir
= opendir (dir_name
)) == NULL
)
824 error (0, errno
, _("Can't open directory %s"), entry
->path
);
825 if (opt_chroot
&& dir_name
)
830 struct dirent64
*direntry
;
831 struct dlib_entry
*dlibs
= NULL
;
832 while ((direntry
= readdir64 (dir
)) != NULL
)
835 /* We only look at links and regular files. */
836 if (direntry
->d_type
!= DT_UNKNOWN
837 && direntry
->d_type
!= DT_LNK
838 && direntry
->d_type
!= DT_REG
839 && direntry
->d_type
!= DT_DIR
)
841 /* Does this file look like a shared library or is it a hwcap
842 subdirectory (if not already processing a glibc-hwcaps
843 subdirectory)? The dynamic linker is also considered as
845 if (((strncmp (direntry
->d_name
, "lib", 3) != 0
846 && strncmp (direntry
->d_name
, "ld-", 3) != 0)
847 || strstr (direntry
->d_name
, ".so") == NULL
)
848 && (direntry
->d_type
== DT_REG
849 || (entry
->hwcaps
== NULL
850 && !is_hwcap_platform (direntry
->d_name
))))
853 size_t len
= strlen (direntry
->d_name
);
854 /* Skip temporary files created by the prelink program. Files with
855 names like these are never really DSOs we want to look at. */
856 if (len
>= sizeof (".#prelink#") - 1)
858 if (strcmp (direntry
->d_name
+ len
- sizeof (".#prelink#") + 1,
861 if (len
>= sizeof (".#prelink#.XXXXXX") - 1
862 && memcmp (direntry
->d_name
+ len
- sizeof (".#prelink#.XXXXXX")
863 + 1, ".#prelink#.", sizeof (".#prelink#.") - 1) == 0)
866 len
+= strlen (entry
->path
) + 2;
867 if (len
> file_name_len
)
870 file_name
= alloca (file_name_len
);
872 real_file_name
= file_name
;
874 sprintf (file_name
, "%s/%s", entry
->path
, direntry
->d_name
);
877 len
= strlen (dir_name
) + strlen (direntry
->d_name
) + 2;
878 if (len
> real_file_name_len
)
880 real_file_name_len
= len
;
881 real_file_name
= alloca (real_file_name_len
);
883 sprintf (real_file_name
, "%s/%s", dir_name
, direntry
->d_name
);
886 struct stat64 lstat_buf
;
887 /* We optimize and try to do the lstat call only if needed. */
888 if (direntry
->d_type
!= DT_UNKNOWN
)
889 lstat_buf
.st_mode
= DTTOIF (direntry
->d_type
);
891 if (__glibc_unlikely (lstat64 (real_file_name
, &lstat_buf
)))
893 error (0, errno
, _("Cannot lstat %s"), file_name
);
897 struct stat64 stat_buf
;
899 int is_link
= S_ISLNK (lstat_buf
.st_mode
);
902 /* In case of symlink, we check if the symlink refers to
904 char *target_name
= real_file_name
;
907 target_name
= chroot_canon (opt_chroot
, file_name
);
908 if (target_name
== NULL
)
910 if (strstr (file_name
, ".so") == NULL
)
911 error (0, 0, _("Input file %s not found.\n"), file_name
);
915 if (__glibc_unlikely (stat64 (target_name
, &stat_buf
)))
918 error (0, errno
, _("Cannot stat %s"), file_name
);
920 /* Remove stale symlinks. */
921 if (opt_link
&& strstr (direntry
->d_name
, ".so."))
922 unlink (real_file_name
);
925 is_dir
= S_ISDIR (stat_buf
.st_mode
);
927 /* lstat_buf is later stored, update contents. */
928 lstat_buf
.st_dev
= stat_buf
.st_dev
;
929 lstat_buf
.st_ino
= stat_buf
.st_ino
;
930 lstat_buf
.st_size
= stat_buf
.st_size
;
931 lstat_buf
.st_ctime
= stat_buf
.st_ctime
;
934 is_dir
= S_ISDIR (lstat_buf
.st_mode
);
936 /* No descending into subdirectories if this directory is a
937 glibc-hwcaps subdirectory (which are not recursive). */
938 if (entry
->hwcaps
== NULL
939 && is_dir
&& is_hwcap_platform (direntry
->d_name
))
942 && direntry
->d_type
!= DT_UNKNOWN
943 && __builtin_expect (lstat64 (real_file_name
, &lstat_buf
), 0))
945 error (0, errno
, _("Cannot lstat %s"), file_name
);
949 /* Handle subdirectory later. */
950 struct dir_entry
*new_entry
= new_sub_entry (entry
, file_name
,
952 add_single_dir (new_entry
, 0);
955 else if (!S_ISREG (lstat_buf
.st_mode
) && !is_link
)
959 if (opt_chroot
&& is_link
)
961 real_name
= chroot_canon (opt_chroot
, file_name
);
962 if (real_name
== NULL
)
964 if (strstr (file_name
, ".so") == NULL
)
965 error (0, 0, _("Input file %s not found.\n"), file_name
);
970 real_name
= real_file_name
;
972 /* Call lstat64 if not done yet. */
974 && direntry
->d_type
!= DT_UNKNOWN
975 && __builtin_expect (lstat64 (real_file_name
, &lstat_buf
), 0))
977 error (0, errno
, _("Cannot lstat %s"), file_name
);
981 /* First search whether the auxiliary cache contains this
982 library already and it's not changed. */
984 unsigned int osversion
;
985 unsigned int isa_level
;
986 if (!search_aux_cache (&lstat_buf
, &flag
, &osversion
, &isa_level
,
989 if (process_file (real_name
, file_name
, direntry
->d_name
, &flag
,
990 &osversion
, &isa_level
, &soname
, is_link
,
993 if (real_name
!= real_file_name
)
997 else if (opt_build_cache
)
998 add_to_aux_cache (&lstat_buf
, flag
, osversion
, isa_level
,
1003 soname
= implicit_soname (direntry
->d_name
, flag
);
1005 /* A link may just point to itself. */
1008 /* If the path the link points to isn't its soname or it is not
1009 the .so symlink for ld(1), we treat it as a normal file.
1011 You should always do this:
1013 libfoo.so -> SONAME -> Arbitrary package-chosen name.
1015 e.g. libfoo.so -> libfoo.so.1 -> libfooimp.so.9.99.
1016 Given a SONAME of libfoo.so.1.
1018 You should *never* do this:
1020 libfoo.so -> libfooimp.so.9.99
1022 If you do, and your SONAME is libfoo.so.1, then libfoo.so
1023 fails to point at the SONAME. In that case ldconfig may consider
1024 libfoo.so as another implementation of SONAME and will create
1025 symlinks against it causing problems when you try to upgrade
1026 or downgrade. The problems will arise because ldconfig will,
1027 depending on directory ordering, creat symlinks against libfoo.so
1028 e.g. libfoo.so.1.2 -> libfoo.so, but when libfoo.so is removed
1029 (typically by the removal of a development pacakge not required
1030 for the runtime) it will break the libfoo.so.1.2 symlink and the
1031 application will fail to start. */
1032 const char *real_base_name
= basename (real_file_name
);
1034 if (strcmp (real_base_name
, soname
) != 0)
1036 len
= strlen (real_base_name
);
1037 if (len
< strlen (".so")
1038 || strcmp (real_base_name
+ len
- strlen (".so"), ".so") != 0
1039 || strncmp (real_base_name
, soname
, len
) != 0)
1044 if (real_name
!= real_file_name
)
1050 soname
= xstrdup (direntry
->d_name
);
1053 if (flag
== FLAG_ELF
1054 && (entry
->flag
== FLAG_ELF_LIBC5
1055 || entry
->flag
== FLAG_ELF_LIBC6
))
1058 /* Some sanity checks to print warnings. */
1061 if (flag
== FLAG_ELF_LIBC5
&& entry
->flag
!= FLAG_ELF_LIBC5
1062 && entry
->flag
!= FLAG_ANY
)
1063 error (0, 0, _("libc5 library %s in wrong directory"), file_name
);
1064 if (flag
== FLAG_ELF_LIBC6
&& entry
->flag
!= FLAG_ELF_LIBC6
1065 && entry
->flag
!= FLAG_ANY
)
1066 error (0, 0, _("libc6 library %s in wrong directory"), file_name
);
1067 if (flag
== FLAG_LIBC4
&& entry
->flag
!= FLAG_LIBC4
1068 && entry
->flag
!= FLAG_ANY
)
1069 error (0, 0, _("libc4 library %s in wrong directory"), file_name
);
1072 /* Add library to list. */
1073 struct dlib_entry
*dlib_ptr
;
1074 for (dlib_ptr
= dlibs
; dlib_ptr
!= NULL
; dlib_ptr
= dlib_ptr
->next
)
1076 /* Is soname already in list? */
1077 if (strcmp (dlib_ptr
->soname
, soname
) == 0)
1079 /* Prefer a file to a link, otherwise check which one
1081 if ((!is_link
&& dlib_ptr
->is_link
)
1082 || (is_link
== dlib_ptr
->is_link
1083 && _dl_cache_libcmp (dlib_ptr
->name
, direntry
->d_name
) < 0))
1085 /* It's newer - add it. */
1086 /* Flag should be the same - sanity check. */
1087 if (dlib_ptr
->flag
!= flag
)
1089 if (dlib_ptr
->flag
== FLAG_ELF
1090 && (flag
== FLAG_ELF_LIBC5
|| flag
== FLAG_ELF_LIBC6
))
1091 dlib_ptr
->flag
= flag
;
1092 else if ((dlib_ptr
->flag
== FLAG_ELF_LIBC5
1093 || dlib_ptr
->flag
== FLAG_ELF_LIBC6
)
1094 && flag
== FLAG_ELF
)
1095 dlib_ptr
->flag
= flag
;
1097 error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."),
1098 dlib_ptr
->name
, direntry
->d_name
,
1101 free (dlib_ptr
->name
);
1102 dlib_ptr
->name
= xstrdup (direntry
->d_name
);
1103 dlib_ptr
->is_link
= is_link
;
1104 dlib_ptr
->osversion
= osversion
;
1105 dlib_ptr
->isa_level
= isa_level
;
1107 /* Don't add this library, abort loop. */
1108 /* Also free soname, since it's dynamically allocated. */
1113 /* Add the library if it's not already in. */
1114 if (dlib_ptr
== NULL
)
1116 dlib_ptr
= (struct dlib_entry
*)xmalloc (sizeof (struct dlib_entry
));
1117 dlib_ptr
->name
= xstrdup (direntry
->d_name
);
1118 dlib_ptr
->soname
= soname
;
1119 dlib_ptr
->flag
= flag
;
1120 dlib_ptr
->is_link
= is_link
;
1121 dlib_ptr
->osversion
= osversion
;
1122 dlib_ptr
->isa_level
= isa_level
;
1123 /* Add at head of list. */
1124 dlib_ptr
->next
= dlibs
;
1131 /* Now dlibs contains a list of all libs - add those to the cache
1132 and created all symbolic links. */
1133 struct dlib_entry
*dlib_ptr
;
1134 for (dlib_ptr
= dlibs
; dlib_ptr
!= NULL
; dlib_ptr
= dlib_ptr
->next
)
1136 /* The cached file name is the soname for non-glibc-hwcaps
1137 subdirectories (relying on symbolic links; this helps with
1138 library updates that change the file name), and the actual
1139 file for glibc-hwcaps subdirectories. */
1140 const char *filename
;
1141 if (entry
->hwcaps
== NULL
)
1143 /* Don't create links to links. */
1144 if (dlib_ptr
->is_link
== 0)
1145 create_links (dir_name
, entry
->path
, dlib_ptr
->name
,
1147 filename
= dlib_ptr
->soname
;
1151 /* Do not create links in glibc-hwcaps subdirectories, but
1152 still log the cache addition. */
1154 printf ("\t%s -> %s\n", dlib_ptr
->soname
, dlib_ptr
->name
);
1155 filename
= dlib_ptr
->name
;
1157 if (opt_build_cache
)
1158 add_to_cache (entry
->path
, filename
, dlib_ptr
->soname
,
1159 dlib_ptr
->flag
, dlib_ptr
->osversion
,
1160 dlib_ptr
->isa_level
, hwcap
, entry
->hwcaps
);
1163 /* Free all resources. */
1167 free (dlib_ptr
->soname
);
1168 free (dlib_ptr
->name
);
1169 dlibs
= dlibs
->next
;
1173 if (opt_chroot
&& dir_name
)
1177 /* Search through all libraries. */
1181 struct dir_entry
*entry
;
1183 for (entry
= dir_entries
; entry
!= NULL
; entry
= entry
->next
)
1186 /* Free all allocated memory. */
1189 entry
= dir_entries
;
1190 dir_entries
= dir_entries
->next
;
1197 static void parse_conf_include (const char *config_file
, unsigned int lineno
,
1198 bool do_chroot
, const char *pattern
);
1200 /* Parse configuration file. */
1202 parse_conf (const char *filename
, bool do_chroot
)
1208 unsigned int lineno
;
1210 if (do_chroot
&& opt_chroot
)
1212 canon
= chroot_canon (opt_chroot
, filename
);
1214 file
= fopen (canon
, "r");
1221 file
= fopen (filename
, "r");
1226 if (errno
!= ENOENT
)
1227 error (0, errno
, _("\
1228 Warning: ignoring configuration file that cannot be opened: %s"),
1230 if (canon
!= filename
)
1231 free ((char *) canon
);
1235 /* No threads use this stream. */
1236 __fsetlocking (file
, FSETLOCKING_BYCALLER
);
1238 if (canon
!= filename
)
1239 free ((char *) canon
);
1244 ssize_t n
= getline (&line
, &len
, file
);
1249 if (line
[n
- 1] == '\n')
1252 /* Because the file format does not know any form of quoting we
1253 can search forward for the next '#' character and if found
1254 make it terminating the line. */
1255 *strchrnul (line
, '#') = '\0';
1257 /* Remove leading whitespace. NUL is no whitespace character. */
1259 while (isspace (*cp
))
1262 /* If the line is blank it is ignored. */
1266 if (!strncmp (cp
, "include", 7) && isblank (cp
[7]))
1270 while ((dir
= strsep (&cp
, " \t")) != NULL
)
1272 parse_conf_include (filename
, lineno
, do_chroot
, dir
);
1274 else if (!strncasecmp (cp
, "hwcap", 5) && isblank (cp
[5]))
1275 error (0, 0, _("%s:%u: hwcap directive ignored"), filename
, lineno
);
1277 add_dir_1 (cp
, filename
, lineno
);
1279 while (!feof_unlocked (file
));
1281 /* Free buffer and close file. */
1286 /* Handle one word in an `include' line, a glob pattern of additional
1287 config files to read. */
1289 parse_conf_include (const char *config_file
, unsigned int lineno
,
1290 bool do_chroot
, const char *pattern
)
1292 if (opt_chroot
&& pattern
[0] != '/')
1293 error (EXIT_FAILURE
, 0,
1294 _("need absolute file name for configuration file when using -r"));
1297 if (pattern
[0] != '/' && strchr (config_file
, '/') != NULL
)
1299 if (asprintf (©
, "%s/%s", dirname (strdupa (config_file
)),
1301 error (EXIT_FAILURE
, 0, _("memory exhausted"));
1307 if (do_chroot
&& opt_chroot
)
1309 char *canon
= chroot_canon (opt_chroot
, pattern
);
1312 result
= glob64 (canon
, 0, NULL
, &gl
);
1316 result
= glob64 (pattern
, 0, NULL
, &gl
);
1321 for (size_t i
= 0; i
< gl
.gl_pathc
; ++i
)
1322 parse_conf (gl
.gl_pathv
[i
], false);
1334 error (0, errno
, _("%s:%u: cannot read directory %s"),
1335 config_file
, lineno
, pattern
);
1346 /* Honour LD_HWCAP_MASK. */
1350 char *mask
= getenv ("LD_HWCAP_MASK");
1353 hwcap_mask
= strtoul (mask
, NULL
, 0);
1358 main (int argc
, char **argv
)
1360 /* Set locale via LC_ALL. */
1361 setlocale (LC_ALL
, "");
1363 /* But keep the C collation. That way `include' directives using
1364 globbing patterns are processed in a locale-independent order. */
1365 setlocale (LC_COLLATE
, "C");
1367 /* Set the text message domain. */
1368 textdomain (_libc_intl_domainname
);
1370 /* Parse and process arguments. */
1372 argp_parse (&argp
, argc
, argv
, 0, &remaining
, NULL
);
1374 /* Remaining arguments are additional directories if opt_manual_link
1376 if (remaining
!= argc
&& !opt_manual_link
)
1379 for (i
= remaining
; i
< argc
; ++i
)
1380 if (opt_build_cache
&& argv
[i
][0] != '/')
1381 error (EXIT_FAILURE
, 0,
1382 _("relative path `%s' used to build cache"),
1385 add_dir_1 (argv
[i
], "<cmdline>", 0);
1392 /* Normalize the path a bit, we might need it for printing later. */
1393 char *endp
= rawmemchr (opt_chroot
, '\0');
1394 while (endp
> opt_chroot
&& endp
[-1] == '/')
1397 if (endp
== opt_chroot
)
1402 /* It is faster to use chroot if we can. */
1403 if (!chroot (opt_chroot
))
1406 error (EXIT_FAILURE
, errno
, _("Can't chdir to /"));
1412 if (cache_file
== NULL
)
1414 cache_file
= alloca (strlen (LD_SO_CACHE
) + 1);
1415 strcpy (cache_file
, LD_SO_CACHE
);
1418 if (config_file
== NULL
)
1419 config_file
= LD_SO_CONF
;
1421 if (opt_print_cache
)
1425 char *p
= chroot_canon (opt_chroot
, cache_file
);
1427 error (EXIT_FAILURE
, errno
, _("Can't open cache file %s\n"),
1431 print_cache (cache_file
);
1439 /* Canonicalize the directory name of cache_file, not cache_file,
1440 because we'll rename a temporary cache file to it. */
1441 char *p
= strrchr (cache_file
, '/');
1442 char *canon
= chroot_canon (opt_chroot
,
1443 p
? (*p
= '\0', cache_file
) : "/");
1446 error (EXIT_FAILURE
, errno
,
1447 _("Can't open cache file directory %s\n"),
1448 p
? cache_file
: "/");
1455 cache_file
= alloca (strlen (canon
) + strlen (p
) + 2);
1456 sprintf (cache_file
, "%s/%s", canon
, p
);
1460 if (opt_manual_link
)
1462 /* Link all given libraries manually. */
1465 for (i
= remaining
; i
< argc
; ++i
)
1466 manual_link (argv
[i
]);
1472 if (opt_build_cache
)
1475 if (!opt_only_cline
)
1477 parse_conf (config_file
, true);
1479 /* Always add the standard search paths. */
1480 add_system_dir (SLIBDIR
);
1481 if (strcmp (SLIBDIR
, LIBDIR
))
1482 add_system_dir (LIBDIR
);
1485 const char *aux_cache_file
= _PATH_LDCONFIG_AUX_CACHE
;
1487 aux_cache_file
= chroot_canon (opt_chroot
, aux_cache_file
);
1489 if (! opt_ignore_aux_cache
&& aux_cache_file
)
1490 load_aux_cache (aux_cache_file
);
1496 if (opt_build_cache
)
1498 save_cache (cache_file
);
1500 save_aux_cache (aux_cache_file
);