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2b778ceb | 1 | /* Copyright (C) 1999-2021 Free Software Foundation, Inc. |
591e1ffb UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Andreas Jaeger <aj@suse.de>, 1999. | |
4 | ||
43bc8ac6 | 5 | This program is free software; you can redistribute it and/or modify |
2e2efe65 RM |
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. | |
591e1ffb | 9 | |
43bc8ac6 | 10 | This program is distributed in the hope that it will be useful, |
591e1ffb | 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
43bc8ac6 UD |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. | |
591e1ffb | 14 | |
43bc8ac6 | 15 | You should have received a copy of the GNU General Public License |
5a82c748 | 16 | along with this program; if not, see <https://www.gnu.org/licenses/>. */ |
591e1ffb | 17 | |
ee600e3f | 18 | #define PROCINFO_CLASS static |
b44ac4f4 | 19 | #include <assert.h> |
7b0d235c | 20 | #include <alloca.h> |
591e1ffb UD |
21 | #include <argp.h> |
22 | #include <dirent.h> | |
9c95d361 | 23 | #include <elf.h> |
591e1ffb UD |
24 | #include <error.h> |
25 | #include <errno.h> | |
5a35dfca | 26 | #include <inttypes.h> |
591e1ffb | 27 | #include <libintl.h> |
11bf311e | 28 | #include <locale.h> |
f57ebe29 | 29 | #include <stdbool.h> |
591e1ffb | 30 | #include <stdio.h> |
c96873d7 | 31 | #include <stdio_ext.h> |
591e1ffb UD |
32 | #include <stdlib.h> |
33 | #include <string.h> | |
34 | #include <unistd.h> | |
e054f494 | 35 | #include <stdint.h> |
591e1ffb UD |
36 | #include <sys/fcntl.h> |
37 | #include <sys/mman.h> | |
38 | #include <sys/stat.h> | |
39 | #include <sys/types.h> | |
8e115d80 RM |
40 | #include <glob.h> |
41 | #include <libgen.h> | |
591e1ffb | 42 | |
8f480b4b RM |
43 | #include <ldconfig.h> |
44 | #include <dl-cache.h> | |
b44ac4f4 | 45 | #include <dl-hwcaps.h> |
591e1ffb | 46 | |
8f480b4b | 47 | #include <dl-procinfo.h> |
591e1ffb | 48 | |
31563b68 FW |
49 | /* This subpath in search path entries is always supported and |
50 | included in the cache for backwards compatibility. */ | |
51 | #define TLS_SUBPATH "tls" | |
52 | ||
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 | |
ab1d521d | 58 | |
591e1ffb | 59 | #ifndef LD_SO_CONF |
8ca91b36 | 60 | # define LD_SO_CONF SYSCONFDIR "/ld.so.conf" |
591e1ffb UD |
61 | #endif |
62 | ||
63 | /* Get libc version number. */ | |
64 | #include <version.h> | |
65 | ||
66 | #define PACKAGE _libc_intl_domainname | |
67 | ||
591e1ffb UD |
68 | static const struct |
69 | { | |
70 | const char *name; | |
71 | int flag; | |
a986484f | 72 | } lib_types[] = |
591e1ffb UD |
73 | { |
74 | {"libc4", FLAG_LIBC4}, | |
75 | {"libc5", FLAG_ELF_LIBC5}, | |
76 | {"libc6", FLAG_ELF_LIBC6}, | |
77 | {"glibc2", FLAG_ELF_LIBC6} | |
45eca4d1 | 78 | }; |
591e1ffb UD |
79 | |
80 | ||
81 | /* List of directories to handle. */ | |
82 | struct dir_entry | |
83 | { | |
84 | char *path; | |
85 | int flag; | |
4ceae915 AJ |
86 | ino64_t ino; |
87 | dev_t dev; | |
b7176cc2 DD |
88 | const char *from_file; |
89 | int from_line; | |
b44ac4f4 FW |
90 | |
91 | /* Non-NULL for subdirectories under a glibc-hwcaps subdirectory. */ | |
92 | struct glibc_hwcaps_subdirectory *hwcaps; | |
93 | ||
591e1ffb UD |
94 | struct dir_entry *next; |
95 | }; | |
96 | ||
97 | /* The list is unsorted, contains no duplicates. Entries are added at | |
98 | the end. */ | |
99 | static struct dir_entry *dir_entries; | |
100 | ||
101 | /* Flags for different options. */ | |
102 | /* Print Cache. */ | |
c96873d7 | 103 | static int opt_print_cache; |
591e1ffb UD |
104 | |
105 | /* Be verbose. */ | |
c96873d7 | 106 | int opt_verbose; |
591e1ffb | 107 | |
45eca4d1 | 108 | /* Format to support. */ |
db07fae8 | 109 | enum opt_format opt_format = opt_format_new; |
45eca4d1 | 110 | |
591e1ffb UD |
111 | /* Build cache. */ |
112 | static int opt_build_cache = 1; | |
113 | ||
920b35c9 FW |
114 | /* Enable symbolic link processing. If set, create or update symbolic |
115 | links, and remove stale symbolic links. */ | |
591e1ffb UD |
116 | static int opt_link = 1; |
117 | ||
118 | /* Only process directories specified on the command line. */ | |
c96873d7 | 119 | static int opt_only_cline; |
591e1ffb UD |
120 | |
121 | /* Path to root for chroot. */ | |
122 | static char *opt_chroot; | |
123 | ||
b85697f6 | 124 | /* Manually link given shared libraries. */ |
c96873d7 | 125 | static int opt_manual_link; |
b85697f6 | 126 | |
27d9ffda UD |
127 | /* Should we ignore an old auxiliary cache file? */ |
128 | static int opt_ignore_aux_cache; | |
129 | ||
591e1ffb | 130 | /* Cache file to use. */ |
b4a555d6 | 131 | static char *cache_file; |
591e1ffb UD |
132 | |
133 | /* Configuration file. */ | |
134 | static const char *config_file; | |
135 | ||
0cfbb8c6 UD |
136 | /* Mask to use for important hardware capabilities. */ |
137 | static unsigned long int hwcap_mask = HWCAP_IMPORTANT; | |
138 | ||
591e1ffb UD |
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 *) | |
142 | = print_version; | |
143 | ||
cbbcaf23 UD |
144 | /* Function to print some extra text in the help message. */ |
145 | static char *more_help (int key, const char *text, void *input); | |
146 | ||
591e1ffb UD |
147 | /* Definitions of arguments for argp functions. */ |
148 | static const struct argp_option options[] = | |
149 | { | |
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}, | |
920b35c9 | 153 | { NULL, 'X', NULL, 0, N_("Don't update symbolic links"), 0}, |
7864c09b UD |
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}, | |
591e1ffb | 157 | { NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0}, |
b85697f6 | 158 | { NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0}, |
cad64f77 | 159 | { "format", 'c', N_("FORMAT"), 0, N_("Format to use: new (default), old, or compat"), 0}, |
27d9ffda | 160 | { "ignore-aux-cache", 'i', NULL, 0, N_("Ignore auxiliary cache file"), 0}, |
591e1ffb UD |
161 | { NULL, 0, NULL, 0, NULL, 0 } |
162 | }; | |
163 | ||
11bf8ce1 UD |
164 | #define PROCINFO_CLASS static |
165 | #include <dl-procinfo.c> | |
166 | ||
591e1ffb UD |
167 | /* Short description of program. */ |
168 | static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings."); | |
169 | ||
170 | /* Prototype for option handler. */ | |
171 | static error_t parse_opt (int key, char *arg, struct argp_state *state); | |
172 | ||
173 | /* Data structure to communicate with argp functions. */ | |
174 | static struct argp argp = | |
175 | { | |
cbbcaf23 | 176 | options, parse_opt, NULL, doc, NULL, more_help, NULL |
591e1ffb UD |
177 | }; |
178 | ||
a6c1c03a AJ |
179 | /* Check if string corresponds to an important hardware capability or |
180 | a platform. */ | |
45eca4d1 | 181 | static int |
a6c1c03a | 182 | is_hwcap_platform (const char *name) |
45eca4d1 UD |
183 | { |
184 | int hwcap_idx = _dl_string_hwcap (name); | |
8ca91b36 | 185 | |
13e23af7 | 186 | /* Is this a normal hwcap for the machine like "fpu?" */ |
0cfbb8c6 | 187 | if (hwcap_idx != -1 && ((1 << hwcap_idx) & hwcap_mask)) |
45eca4d1 | 188 | return 1; |
a6c1c03a | 189 | |
13e23af7 | 190 | /* Is this a platform pseudo-hwcap like "i686?" */ |
a6c1c03a AJ |
191 | hwcap_idx = _dl_string_platform (name); |
192 | if (hwcap_idx != -1) | |
193 | return 1; | |
194 | ||
31563b68 FW |
195 | /* Backwards-compatibility for the "tls" subdirectory. */ |
196 | if (strcmp (name, TLS_SUBPATH) == 0) | |
197 | return 1; | |
676fde70 | 198 | |
45eca4d1 UD |
199 | return 0; |
200 | } | |
201 | ||
a6c1c03a AJ |
202 | /* Get hwcap (including platform) encoding of path. */ |
203 | static uint64_t | |
45eca4d1 UD |
204 | path_hwcap (const char *path) |
205 | { | |
206 | char *str = xstrdup (path); | |
207 | char *ptr; | |
a6c1c03a AJ |
208 | uint64_t hwcap = 0; |
209 | uint64_t h; | |
45eca4d1 UD |
210 | |
211 | size_t len; | |
212 | ||
213 | len = strlen (str); | |
214 | if (str[len] == '/') | |
215 | str[len] = '\0'; | |
216 | ||
217 | /* Search pathname from the end and check for hwcap strings. */ | |
218 | for (;;) | |
219 | { | |
220 | ptr = strrchr (str, '/'); | |
221 | ||
222 | if (ptr == NULL) | |
223 | break; | |
224 | ||
a6c1c03a | 225 | h = _dl_string_hwcap (ptr + 1); |
45eca4d1 | 226 | |
59553897 UD |
227 | if (h == (uint64_t) -1) |
228 | { | |
229 | h = _dl_string_platform (ptr + 1); | |
230 | if (h == (uint64_t) -1) | |
676fde70 | 231 | { |
31563b68 FW |
232 | if (strcmp (ptr + 1, TLS_SUBPATH) == 0) |
233 | h = TLS_HWCAP_BIT; | |
234 | else | |
676fde70 UD |
235 | break; |
236 | } | |
59553897 | 237 | } |
a6c1c03a | 238 | hwcap += 1ULL << h; |
591e1ffb | 239 | |
45eca4d1 UD |
240 | /* Search the next part of the path. */ |
241 | *ptr = '\0'; | |
242 | } | |
243 | ||
244 | free (str); | |
245 | return hwcap; | |
246 | } | |
591e1ffb UD |
247 | |
248 | /* Handle program arguments. */ | |
249 | static error_t | |
250 | parse_opt (int key, char *arg, struct argp_state *state) | |
251 | { | |
252 | switch (key) | |
253 | { | |
254 | case 'C': | |
255 | cache_file = arg; | |
27d9ffda UD |
256 | /* Ignore auxiliary cache since we use non-standard cache. */ |
257 | opt_ignore_aux_cache = 1; | |
591e1ffb UD |
258 | break; |
259 | case 'f': | |
260 | config_file = arg; | |
261 | break; | |
27d9ffda UD |
262 | case 'i': |
263 | opt_ignore_aux_cache = 1; | |
264 | break; | |
b85697f6 UD |
265 | case 'l': |
266 | opt_manual_link = 1; | |
267 | break; | |
591e1ffb UD |
268 | case 'N': |
269 | opt_build_cache = 0; | |
270 | break; | |
271 | case 'n': | |
272 | opt_build_cache = 0; | |
273 | opt_only_cline = 1; | |
274 | break; | |
275 | case 'p': | |
276 | opt_print_cache = 1; | |
277 | break; | |
278 | case 'r': | |
279 | opt_chroot = arg; | |
280 | break; | |
281 | case 'v': | |
282 | opt_verbose = 1; | |
283 | break; | |
284 | case 'X': | |
285 | opt_link = 0; | |
286 | break; | |
45eca4d1 UD |
287 | case 'c': |
288 | if (strcmp (arg, "old") == 0) | |
db07fae8 | 289 | opt_format = opt_format_old; |
45eca4d1 | 290 | else if (strcmp (arg, "compat") == 0) |
db07fae8 | 291 | opt_format = opt_format_compat; |
45eca4d1 | 292 | else if (strcmp (arg, "new") == 0) |
db07fae8 | 293 | opt_format = opt_format_new; |
45eca4d1 | 294 | break; |
591e1ffb UD |
295 | default: |
296 | return ARGP_ERR_UNKNOWN; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
cbbcaf23 UD |
302 | /* Print bug-reporting information in the help message. */ |
303 | static char * | |
304 | more_help (int key, const char *text, void *input) | |
305 | { | |
8b748aed | 306 | char *tp = NULL; |
cbbcaf23 UD |
307 | switch (key) |
308 | { | |
309 | case ARGP_KEY_HELP_EXTRA: | |
310 | /* We print some extra information. */ | |
8b748aed | 311 | if (asprintf (&tp, gettext ("\ |
cbbcaf23 | 312 | For bug reporting instructions, please see:\n\ |
8b748aed JM |
313 | %s.\n"), REPORT_BUGS_TO) < 0) |
314 | return NULL; | |
315 | return tp; | |
cbbcaf23 UD |
316 | default: |
317 | break; | |
318 | } | |
319 | return (char *) text; | |
320 | } | |
321 | ||
591e1ffb UD |
322 | /* Print the version information. */ |
323 | static void | |
324 | print_version (FILE *stream, struct argp_state *state) | |
325 | { | |
8b748aed | 326 | fprintf (stream, "ldconfig %s%s\n", PKGVERSION, VERSION); |
591e1ffb UD |
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\ | |
5f72f980 | 331 | "), "2020"); |
591e1ffb UD |
332 | fprintf (stream, gettext ("Written by %s.\n"), |
333 | "Andreas Jaeger"); | |
334 | } | |
335 | ||
5e598c2b FW |
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) | |
341 | { | |
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; | |
b44ac4f4 | 347 | new_entry->hwcaps = NULL; |
5e598c2b FW |
348 | new_entry->next = NULL; |
349 | new_entry->ino = st->st_ino; | |
350 | new_entry->dev = st->st_dev; | |
351 | return new_entry; | |
352 | } | |
353 | ||
b44ac4f4 FW |
354 | /* Add a single directory entry. Return true if the directory is |
355 | actually added (because it is not a duplicate). */ | |
356 | static bool | |
a8fd59b0 AJ |
357 | add_single_dir (struct dir_entry *entry, int verbose) |
358 | { | |
359 | struct dir_entry *ptr, *prev; | |
b44ac4f4 | 360 | bool added = true; |
a8fd59b0 AJ |
361 | |
362 | ptr = dir_entries; | |
363 | prev = ptr; | |
364 | while (ptr != NULL) | |
365 | { | |
366 | /* Check for duplicates. */ | |
4ceae915 | 367 | if (ptr->ino == entry->ino && ptr->dev == entry->dev) |
a8fd59b0 AJ |
368 | { |
369 | if (opt_verbose && verbose) | |
b7176cc2 DD |
370 | { |
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); | |
375 | } | |
a8fd59b0 AJ |
376 | /* Use the newer information. */ |
377 | ptr->flag = entry->flag; | |
4ceae915 | 378 | free (entry->path); |
a8fd59b0 | 379 | free (entry); |
b44ac4f4 | 380 | added = false; |
a8fd59b0 AJ |
381 | break; |
382 | } | |
383 | prev = ptr; | |
384 | ptr = ptr->next; | |
385 | } | |
386 | /* Is this the first entry? */ | |
387 | if (ptr == NULL && dir_entries == NULL) | |
388 | dir_entries = entry; | |
389 | else if (ptr == NULL) | |
390 | prev->next = entry; | |
b44ac4f4 FW |
391 | return added; |
392 | } | |
393 | ||
394 | /* Check if PATH contains a "glibc-hwcaps" subdirectory. If so, queue | |
395 | its subdirectories for glibc-hwcaps processing. */ | |
396 | static void | |
397 | add_glibc_hwcaps_subdirectories (struct dir_entry *entry, const char *path) | |
398 | { | |
399 | /* glibc-hwcaps subdirectories do not nest. */ | |
400 | assert (entry->hwcaps == NULL); | |
401 | ||
402 | char *glibc_hwcaps; | |
403 | if (asprintf (&glibc_hwcaps, "%s/" GLIBC_HWCAPS_SUBDIRECTORY, path) < 0) | |
404 | error (EXIT_FAILURE, errno, _("Could not form glibc-hwcaps path")); | |
405 | ||
406 | DIR *dir = opendir (glibc_hwcaps); | |
407 | if (dir != NULL) | |
408 | { | |
409 | while (true) | |
410 | { | |
411 | errno = 0; | |
412 | struct dirent64 *e = readdir64 (dir); | |
413 | if (e == NULL) | |
414 | { | |
415 | if (errno == 0) | |
416 | break; | |
417 | else | |
418 | error (EXIT_FAILURE, errno, _("Listing directory %s"), path); | |
419 | } | |
420 | ||
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 | |
424 | well. */ | |
425 | if (e->d_name[0] == '.' || e->d_type == DT_REG | |
426 | || strchr (e->d_name, ':') != NULL) | |
427 | continue; | |
428 | ||
429 | /* See if this entry eventually resolves to a directory. */ | |
430 | struct stat64 st; | |
431 | if (fstatat64 (dirfd (dir), e->d_name, &st, 0) < 0) | |
432 | /* Ignore unreadable entries. */ | |
433 | continue; | |
434 | ||
435 | if (S_ISDIR (st.st_mode)) | |
436 | { | |
437 | /* This is a directory, so it needs to be scanned for | |
438 | libraries, associated with the hwcaps implied by the | |
439 | subdirectory name. */ | |
440 | char *new_path; | |
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, | |
447 | &st); | |
448 | free (new_path); | |
449 | new_entry->hwcaps = new_glibc_hwcaps_subdirectory (e->d_name); | |
450 | add_single_dir (new_entry, 0); | |
451 | } | |
452 | } | |
453 | ||
454 | closedir (dir); | |
455 | } | |
456 | ||
457 | free (glibc_hwcaps); | |
a8fd59b0 AJ |
458 | } |
459 | ||
591e1ffb UD |
460 | /* Add one directory to the list of directories to process. */ |
461 | static void | |
b7176cc2 | 462 | add_dir_1 (const char *line, const char *from_file, int from_line) |
591e1ffb | 463 | { |
591e1ffb | 464 | unsigned int i; |
539842a4 | 465 | struct dir_entry *entry = xmalloc (sizeof (struct dir_entry)); |
b44ac4f4 | 466 | entry->hwcaps = NULL; |
591e1ffb | 467 | entry->next = NULL; |
45eca4d1 | 468 | |
b7176cc2 DD |
469 | entry->from_file = strdup (from_file); |
470 | entry->from_line = from_line; | |
471 | ||
591e1ffb UD |
472 | /* Search for an '=' sign. */ |
473 | entry->path = xstrdup (line); | |
539842a4 | 474 | char *equal_sign = strchr (entry->path, '='); |
591e1ffb UD |
475 | if (equal_sign) |
476 | { | |
477 | *equal_sign = '\0'; | |
478 | ++equal_sign; | |
479 | entry->flag = FLAG_ANY; | |
a986484f | 480 | for (i = 0; i < sizeof (lib_types) / sizeof (lib_types[0]); ++i) |
591e1ffb UD |
481 | if (strcmp (equal_sign, lib_types[i].name) == 0) |
482 | { | |
483 | entry->flag = lib_types[i].flag; | |
484 | break; | |
485 | } | |
486 | if (entry->flag == FLAG_ANY) | |
487 | error (0, 0, _("%s is not a known library type"), equal_sign); | |
488 | } | |
489 | else | |
490 | { | |
491 | entry->flag = FLAG_ANY; | |
492 | } | |
493 | ||
69acbe9f | 494 | /* Canonify path: for now only remove leading and trailing |
00ee369c AS |
495 | whitespace and the trailing slashes. */ |
496 | i = strlen (entry->path); | |
69acbe9f | 497 | |
00ee369c AS |
498 | while (i > 0 && isspace (entry->path[i - 1])) |
499 | entry->path[--i] = '\0'; | |
69acbe9f | 500 | |
00ee369c AS |
501 | while (i > 0 && entry->path[i - 1] == '/') |
502 | entry->path[--i] = '\0'; | |
503 | ||
504 | if (i == 0) | |
505 | return; | |
45eca4d1 | 506 | |
539842a4 UD |
507 | char *path = entry->path; |
508 | if (opt_chroot) | |
509 | path = chroot_canon (opt_chroot, path); | |
510 | ||
511 | struct stat64 stat_buf; | |
512 | if (path == NULL || stat64 (path, &stat_buf)) | |
4ceae915 | 513 | { |
8645ad47 AJ |
514 | if (opt_verbose) |
515 | error (0, errno, _("Can't stat %s"), entry->path); | |
4ceae915 AJ |
516 | free (entry->path); |
517 | free (entry); | |
4ceae915 | 518 | } |
539842a4 UD |
519 | else |
520 | { | |
521 | entry->ino = stat_buf.st_ino; | |
522 | entry->dev = stat_buf.st_dev; | |
4ceae915 | 523 | |
b44ac4f4 FW |
524 | if (add_single_dir (entry, 1)) |
525 | /* Add glibc-hwcaps subdirectories if present. */ | |
526 | add_glibc_hwcaps_subdirectories (entry, path); | |
539842a4 | 527 | } |
4ceae915 | 528 | |
539842a4 UD |
529 | if (opt_chroot) |
530 | free (path); | |
591e1ffb UD |
531 | } |
532 | ||
b7176cc2 DD |
533 | static void |
534 | add_dir (const char *line) | |
535 | { | |
536 | add_dir_1 (line, "<builtin>", 0); | |
537 | } | |
591e1ffb | 538 | |
b4a555d6 UD |
539 | static int |
540 | chroot_stat (const char *real_path, const char *path, struct stat64 *st) | |
541 | { | |
542 | int ret; | |
543 | char *canon_path; | |
544 | ||
545 | if (!opt_chroot) | |
546 | return stat64 (real_path, st); | |
547 | ||
548 | ret = lstat64 (real_path, st); | |
549 | if (ret || !S_ISLNK (st->st_mode)) | |
550 | return ret; | |
551 | ||
552 | canon_path = chroot_canon (opt_chroot, path); | |
553 | if (canon_path == NULL) | |
554 | return -1; | |
555 | ||
556 | ret = stat64 (canon_path, st); | |
557 | free (canon_path); | |
558 | return ret; | |
559 | } | |
560 | ||
591e1ffb UD |
561 | /* Create a symbolic link from soname to libname in directory path. */ |
562 | static void | |
b4a555d6 UD |
563 | create_links (const char *real_path, const char *path, const char *libname, |
564 | const char *soname) | |
591e1ffb | 565 | { |
7b0d235c | 566 | char *full_libname, *full_soname; |
b4a555d6 UD |
567 | char *real_full_libname, *real_full_soname; |
568 | struct stat64 stat_lib, stat_so, lstat_so; | |
591e1ffb UD |
569 | int do_link = 1; |
570 | int do_remove = 1; | |
571 | /* XXX: The logics in this function should be simplified. */ | |
45eca4d1 | 572 | |
591e1ffb | 573 | /* Get complete path. */ |
7b0d235c | 574 | full_libname = alloca (strlen (path) + strlen (libname) + 2); |
7c545dbe | 575 | full_soname = alloca (strlen (path) + strlen (soname) + 2); |
7b0d235c AJ |
576 | sprintf (full_libname, "%s/%s", path, libname); |
577 | sprintf (full_soname, "%s/%s", path, soname); | |
b4a555d6 UD |
578 | if (opt_chroot) |
579 | { | |
580 | real_full_libname = alloca (strlen (real_path) + strlen (libname) + 2); | |
7c545dbe | 581 | real_full_soname = alloca (strlen (real_path) + strlen (soname) + 2); |
b4a555d6 UD |
582 | sprintf (real_full_libname, "%s/%s", real_path, libname); |
583 | sprintf (real_full_soname, "%s/%s", real_path, soname); | |
584 | } | |
585 | else | |
586 | { | |
587 | real_full_libname = full_libname; | |
588 | real_full_soname = full_soname; | |
589 | } | |
591e1ffb UD |
590 | |
591 | /* Does soname already exist and point to the right library? */ | |
b4a555d6 | 592 | if (chroot_stat (real_full_soname, full_soname, &stat_so) == 0) |
591e1ffb | 593 | { |
b4a555d6 | 594 | if (chroot_stat (real_full_libname, full_libname, &stat_lib)) |
591e1ffb UD |
595 | { |
596 | error (0, 0, _("Can't stat %s\n"), full_libname); | |
597 | return; | |
598 | } | |
599 | if (stat_lib.st_dev == stat_so.st_dev | |
600 | && stat_lib.st_ino == stat_so.st_ino) | |
601 | /* Link is already correct. */ | |
602 | do_link = 0; | |
b4a555d6 | 603 | else if (lstat64 (full_soname, &lstat_so) == 0 |
591e1ffb UD |
604 | && !S_ISLNK (lstat_so.st_mode)) |
605 | { | |
606 | error (0, 0, _("%s is not a symbolic link\n"), full_soname); | |
607 | do_link = 0; | |
608 | do_remove = 0; | |
609 | } | |
610 | } | |
b4a555d6 | 611 | else if (lstat64 (real_full_soname, &lstat_so) != 0 |
591e1ffb UD |
612 | || !S_ISLNK (lstat_so.st_mode)) |
613 | /* Unless it is a stale symlink, there is no need to remove. */ | |
614 | do_remove = 0; | |
615 | ||
616 | if (opt_verbose) | |
617 | printf ("\t%s -> %s", soname, libname); | |
618 | ||
619 | if (do_link && opt_link) | |
620 | { | |
621 | /* Remove old link. */ | |
622 | if (do_remove) | |
b4a555d6 | 623 | if (unlink (real_full_soname)) |
591e1ffb UD |
624 | { |
625 | error (0, 0, _("Can't unlink %s"), full_soname); | |
626 | do_link = 0; | |
627 | } | |
628 | /* Create symbolic link. */ | |
b4a555d6 | 629 | if (do_link && symlink (libname, real_full_soname)) |
591e1ffb UD |
630 | { |
631 | error (0, 0, _("Can't link %s to %s"), full_soname, libname); | |
632 | do_link = 0; | |
633 | } | |
634 | if (opt_verbose) | |
635 | { | |
636 | if (do_link) | |
637 | fputs (_(" (changed)\n"), stdout); | |
638 | else | |
639 | fputs (_(" (SKIPPED)\n"), stdout); | |
640 | } | |
641 | } | |
642 | else if (opt_verbose) | |
643 | fputs ("\n", stdout); | |
644 | } | |
645 | ||
b85697f6 UD |
646 | /* Manually link the given library. */ |
647 | static void | |
648 | manual_link (char *library) | |
649 | { | |
650 | char *path; | |
b4a555d6 UD |
651 | char *real_path; |
652 | char *real_library; | |
b85697f6 UD |
653 | char *libname; |
654 | char *soname; | |
b4a555d6 | 655 | struct stat64 stat_buf; |
b85697f6 | 656 | int flag; |
a986484f | 657 | unsigned int osversion; |
b85697f6 UD |
658 | |
659 | /* Prepare arguments for create_links call. Split library name in | |
660 | directory and filename first. Since path is allocated, we've got | |
661 | to be careful to free at the end. */ | |
662 | path = xstrdup (library); | |
663 | libname = strrchr (path, '/'); | |
664 | ||
665 | if (libname) | |
666 | { | |
667 | /* Successfully split names. Check if path is just "/" to avoid | |
27d9ffda | 668 | an empty path. */ |
b85697f6 UD |
669 | if (libname == path) |
670 | { | |
671 | libname = library + 1; | |
672 | path = xrealloc (path, 2); | |
673 | strcpy (path, "/"); | |
674 | } | |
675 | else | |
676 | { | |
677 | *libname = '\0'; | |
678 | ++libname; | |
679 | } | |
680 | } | |
681 | else | |
682 | { | |
683 | /* There's no path, construct one. */ | |
684 | libname = library; | |
685 | path = xrealloc (path, 2); | |
686 | strcpy (path, "."); | |
687 | } | |
688 | ||
b4a555d6 UD |
689 | if (opt_chroot) |
690 | { | |
691 | real_path = chroot_canon (opt_chroot, path); | |
692 | if (real_path == NULL) | |
693 | { | |
694 | error (0, errno, _("Can't find %s"), path); | |
695 | free (path); | |
696 | return; | |
697 | } | |
698 | real_library = alloca (strlen (real_path) + strlen (libname) + 2); | |
699 | sprintf (real_library, "%s/%s", real_path, libname); | |
700 | } | |
701 | else | |
702 | { | |
703 | real_path = path; | |
704 | real_library = library; | |
705 | } | |
706 | ||
b85697f6 | 707 | /* Do some sanity checks first. */ |
b4a555d6 | 708 | if (lstat64 (real_library, &stat_buf)) |
b85697f6 | 709 | { |
11bf311e | 710 | error (0, errno, _("Cannot lstat %s"), library); |
b85697f6 UD |
711 | free (path); |
712 | return; | |
713 | } | |
714 | /* We don't want links here! */ | |
715 | else if (!S_ISREG (stat_buf.st_mode)) | |
716 | { | |
717 | error (0, 0, _("Ignored file %s since it is not a regular file."), | |
718 | library); | |
719 | free (path); | |
720 | return; | |
721 | } | |
27d9ffda | 722 | |
a986484f | 723 | if (process_file (real_library, library, libname, &flag, &osversion, |
27d9ffda | 724 | &soname, 0, &stat_buf)) |
b85697f6 UD |
725 | { |
726 | error (0, 0, _("No link created since soname could not be found for %s"), | |
727 | library); | |
728 | free (path); | |
729 | return; | |
730 | } | |
27d9ffda UD |
731 | if (soname == NULL) |
732 | soname = implicit_soname (libname, flag); | |
b4a555d6 | 733 | create_links (real_path, path, libname, soname); |
b85697f6 UD |
734 | free (soname); |
735 | free (path); | |
736 | } | |
737 | ||
738 | ||
591e1ffb UD |
739 | /* Read a whole directory and search for libraries. |
740 | The purpose is two-fold: | |
741 | - search for libraries which will be added to the cache | |
742 | - create symbolic links to the soname for each library | |
743 | ||
744 | This has to be done separatly for each directory. | |
45eca4d1 | 745 | |
591e1ffb UD |
746 | To keep track of which libraries to add to the cache and which |
747 | links to create, we save a list of all libraries. | |
748 | ||
749 | The algorithm is basically: | |
750 | for all libraries in the directory do | |
751 | get soname of library | |
752 | if soname is already in list | |
753 | if new library is newer, replace entry | |
754 | otherwise ignore this library | |
755 | otherwise add library to list | |
45eca4d1 | 756 | |
591e1ffb UD |
757 | For example, if the two libraries libxy.so.1.1 and libxy.so.1.2 |
758 | exist and both have the same soname, e.g. libxy.so, a symbolic link | |
759 | is created from libxy.so.1.2 (the newer one) to libxy.so. | |
760 | libxy.so.1.2 and libxy.so are added to the cache - but not | |
761 | libxy.so.1.1. */ | |
762 | ||
763 | /* Information for one library. */ | |
45eca4d1 | 764 | struct dlib_entry |
591e1ffb UD |
765 | { |
766 | char *name; | |
767 | char *soname; | |
768 | int flag; | |
769 | int is_link; | |
a986484f | 770 | unsigned int osversion; |
591e1ffb UD |
771 | struct dlib_entry *next; |
772 | }; | |
773 | ||
774 | ||
775 | static void | |
776 | search_dir (const struct dir_entry *entry) | |
777 | { | |
b44ac4f4 FW |
778 | uint64_t hwcap; |
779 | if (entry->hwcaps == NULL) | |
45eca4d1 | 780 | { |
b44ac4f4 FW |
781 | hwcap = path_hwcap (entry->path); |
782 | if (opt_verbose) | |
783 | { | |
784 | if (hwcap != 0) | |
785 | printf ("%s: (hwcap: %#.16" PRIx64 ")", entry->path, hwcap); | |
786 | else | |
787 | printf ("%s:", entry->path); | |
788 | } | |
45eca4d1 | 789 | } |
b44ac4f4 FW |
790 | else |
791 | { | |
792 | hwcap = 0; | |
793 | if (opt_verbose) | |
794 | printf ("%s: (hwcap: \"%s\")", entry->path, | |
795 | glibc_hwcaps_subdirectory_name (entry->hwcaps)); | |
796 | } | |
797 | if (opt_verbose) | |
798 | printf (_(" (from %s:%d)\n"), entry->from_file, entry->from_line); | |
45eca4d1 | 799 | |
27d9ffda UD |
800 | char *dir_name; |
801 | char *real_file_name; | |
802 | size_t real_file_name_len; | |
803 | size_t file_name_len = PATH_MAX; | |
804 | char *file_name = alloca (file_name_len); | |
b4a555d6 UD |
805 | if (opt_chroot) |
806 | { | |
807 | dir_name = chroot_canon (opt_chroot, entry->path); | |
808 | real_file_name_len = PATH_MAX; | |
809 | real_file_name = alloca (real_file_name_len); | |
810 | } | |
811 | else | |
812 | { | |
813 | dir_name = entry->path; | |
814 | real_file_name_len = 0; | |
815 | real_file_name = file_name; | |
816 | } | |
817 | ||
27d9ffda | 818 | DIR *dir; |
b4a555d6 | 819 | if (dir_name == NULL || (dir = opendir (dir_name)) == NULL) |
591e1ffb UD |
820 | { |
821 | if (opt_verbose) | |
822 | error (0, errno, _("Can't open directory %s"), entry->path); | |
b4a555d6 UD |
823 | if (opt_chroot && dir_name) |
824 | free (dir_name); | |
591e1ffb UD |
825 | return; |
826 | } | |
45eca4d1 | 827 | |
27d9ffda UD |
828 | struct dirent64 *direntry; |
829 | struct dlib_entry *dlibs = NULL; | |
2b510e91 | 830 | while ((direntry = readdir64 (dir)) != NULL) |
591e1ffb UD |
831 | { |
832 | int flag; | |
591e1ffb UD |
833 | /* We only look at links and regular files. */ |
834 | if (direntry->d_type != DT_UNKNOWN | |
835 | && direntry->d_type != DT_LNK | |
45eca4d1 UD |
836 | && direntry->d_type != DT_REG |
837 | && direntry->d_type != DT_DIR) | |
591e1ffb | 838 | continue; |
45eca4d1 | 839 | /* Does this file look like a shared library or is it a hwcap |
b44ac4f4 FW |
840 | subdirectory (if not already processing a glibc-hwcaps |
841 | subdirectory)? The dynamic linker is also considered as | |
45eca4d1 UD |
842 | shared library. */ |
843 | if (((strncmp (direntry->d_name, "lib", 3) != 0 | |
844 | && strncmp (direntry->d_name, "ld-", 3) != 0) | |
845 | || strstr (direntry->d_name, ".so") == NULL) | |
4484b9e2 | 846 | && (direntry->d_type == DT_REG |
b44ac4f4 FW |
847 | || (entry->hwcaps == NULL |
848 | && !is_hwcap_platform (direntry->d_name)))) | |
591e1ffb | 849 | continue; |
27d9ffda UD |
850 | |
851 | size_t len = strlen (direntry->d_name); | |
3858bf28 RM |
852 | /* Skip temporary files created by the prelink program. Files with |
853 | names like these are never really DSOs we want to look at. */ | |
854 | if (len >= sizeof (".#prelink#") - 1) | |
855 | { | |
856 | if (strcmp (direntry->d_name + len - sizeof (".#prelink#") + 1, | |
857 | ".#prelink#") == 0) | |
858 | continue; | |
859 | if (len >= sizeof (".#prelink#.XXXXXX") - 1 | |
860 | && memcmp (direntry->d_name + len - sizeof (".#prelink#.XXXXXX") | |
861 | + 1, ".#prelink#.", sizeof (".#prelink#.") - 1) == 0) | |
862 | continue; | |
863 | } | |
30a3aa75 | 864 | len += strlen (entry->path) + 2; |
7b0d235c | 865 | if (len > file_name_len) |
591e1ffb | 866 | { |
30a3aa75 | 867 | file_name_len = len; |
7b0d235c | 868 | file_name = alloca (file_name_len); |
b4a555d6 UD |
869 | if (!opt_chroot) |
870 | real_file_name = file_name; | |
871 | } | |
872 | sprintf (file_name, "%s/%s", entry->path, direntry->d_name); | |
873 | if (opt_chroot) | |
874 | { | |
30a3aa75 | 875 | len = strlen (dir_name) + strlen (direntry->d_name) + 2; |
b4a555d6 UD |
876 | if (len > real_file_name_len) |
877 | { | |
30a3aa75 | 878 | real_file_name_len = len; |
b4a555d6 UD |
879 | real_file_name = alloca (real_file_name_len); |
880 | } | |
881 | sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name); | |
591e1ffb | 882 | } |
27d9ffda UD |
883 | |
884 | struct stat64 lstat_buf; | |
27d9ffda | 885 | /* We optimize and try to do the lstat call only if needed. */ |
7c3002f0 | 886 | if (direntry->d_type != DT_UNKNOWN) |
4ceae915 | 887 | lstat_buf.st_mode = DTTOIF (direntry->d_type); |
7c3002f0 | 888 | else |
a1ffb40e | 889 | if (__glibc_unlikely (lstat64 (real_file_name, &lstat_buf))) |
7c3002f0 | 890 | { |
95ce33a5 | 891 | error (0, errno, _("Cannot lstat %s"), file_name); |
7c3002f0 UD |
892 | continue; |
893 | } | |
894 | ||
27d9ffda | 895 | struct stat64 stat_buf; |
b44ac4f4 | 896 | bool is_dir; |
27d9ffda | 897 | int is_link = S_ISLNK (lstat_buf.st_mode); |
4ceae915 | 898 | if (is_link) |
27d9ffda | 899 | { |
4ceae915 AJ |
900 | /* In case of symlink, we check if the symlink refers to |
901 | a directory. */ | |
7dee2660 UD |
902 | char *target_name = real_file_name; |
903 | if (opt_chroot) | |
904 | { | |
905 | target_name = chroot_canon (opt_chroot, file_name); | |
906 | if (target_name == NULL) | |
907 | { | |
908 | if (strstr (file_name, ".so") == NULL) | |
909 | error (0, 0, _("Input file %s not found.\n"), file_name); | |
910 | continue; | |
911 | } | |
912 | } | |
a1ffb40e | 913 | if (__glibc_unlikely (stat64 (target_name, &stat_buf))) |
4ceae915 | 914 | { |
8645ad47 | 915 | if (opt_verbose) |
95ce33a5 | 916 | error (0, errno, _("Cannot stat %s"), file_name); |
647eb037 UD |
917 | |
918 | /* Remove stale symlinks. */ | |
920b35c9 | 919 | if (opt_link && strstr (direntry->d_name, ".so.")) |
647eb037 | 920 | unlink (real_file_name); |
4ceae915 AJ |
921 | continue; |
922 | } | |
923 | is_dir = S_ISDIR (stat_buf.st_mode); | |
27d9ffda UD |
924 | |
925 | /* lstat_buf is later stored, update contents. */ | |
926 | lstat_buf.st_dev = stat_buf.st_dev; | |
927 | lstat_buf.st_ino = stat_buf.st_ino; | |
928 | lstat_buf.st_size = stat_buf.st_size; | |
929 | lstat_buf.st_ctime = stat_buf.st_ctime; | |
4ceae915 AJ |
930 | } |
931 | else | |
932 | is_dir = S_ISDIR (lstat_buf.st_mode); | |
933 | ||
b44ac4f4 FW |
934 | /* No descending into subdirectories if this directory is a |
935 | glibc-hwcaps subdirectory (which are not recursive). */ | |
936 | if (entry->hwcaps == NULL | |
937 | && is_dir && is_hwcap_platform (direntry->d_name)) | |
45eca4d1 | 938 | { |
27d9ffda UD |
939 | if (!is_link |
940 | && direntry->d_type != DT_UNKNOWN | |
941 | && __builtin_expect (lstat64 (real_file_name, &lstat_buf), 0)) | |
4ceae915 | 942 | { |
27d9ffda | 943 | error (0, errno, _("Cannot lstat %s"), file_name); |
27d9ffda | 944 | continue; |
4ceae915 | 945 | } |
5e598c2b FW |
946 | |
947 | /* Handle subdirectory later. */ | |
948 | struct dir_entry *new_entry = new_sub_entry (entry, file_name, | |
949 | &lstat_buf); | |
a8fd59b0 | 950 | add_single_dir (new_entry, 0); |
45eca4d1 UD |
951 | continue; |
952 | } | |
0f843f89 | 953 | else if (!S_ISREG (lstat_buf.st_mode) && !is_link) |
591e1ffb UD |
954 | continue; |
955 | ||
27d9ffda | 956 | char *real_name; |
b4a555d6 UD |
957 | if (opt_chroot && is_link) |
958 | { | |
959 | real_name = chroot_canon (opt_chroot, file_name); | |
960 | if (real_name == NULL) | |
961 | { | |
962 | if (strstr (file_name, ".so") == NULL) | |
963 | error (0, 0, _("Input file %s not found.\n"), file_name); | |
964 | continue; | |
965 | } | |
966 | } | |
967 | else | |
968 | real_name = real_file_name; | |
591e1ffb | 969 | |
27d9ffda UD |
970 | /* Call lstat64 if not done yet. */ |
971 | if (!is_link | |
972 | && direntry->d_type != DT_UNKNOWN | |
973 | && __builtin_expect (lstat64 (real_file_name, &lstat_buf), 0)) | |
b4a555d6 | 974 | { |
27d9ffda | 975 | error (0, errno, _("Cannot lstat %s"), file_name); |
b4a555d6 UD |
976 | continue; |
977 | } | |
27d9ffda UD |
978 | |
979 | /* First search whether the auxiliary cache contains this | |
980 | library already and it's not changed. */ | |
981 | char *soname; | |
982 | unsigned int osversion; | |
983 | if (!search_aux_cache (&lstat_buf, &flag, &osversion, &soname)) | |
984 | { | |
985 | if (process_file (real_name, file_name, direntry->d_name, &flag, | |
986 | &osversion, &soname, is_link, &lstat_buf)) | |
987 | { | |
988 | if (real_name != real_file_name) | |
989 | free (real_name); | |
990 | continue; | |
991 | } | |
992 | else if (opt_build_cache) | |
993 | add_to_aux_cache (&lstat_buf, flag, osversion, soname); | |
994 | } | |
b4a555d6 | 995 | |
27d9ffda UD |
996 | if (soname == NULL) |
997 | soname = implicit_soname (direntry->d_name, flag); | |
82d8607d UD |
998 | |
999 | /* A link may just point to itself. */ | |
591e1ffb UD |
1000 | if (is_link) |
1001 | { | |
97114a38 CD |
1002 | /* If the path the link points to isn't its soname or it is not |
1003 | the .so symlink for ld(1), we treat it as a normal file. | |
1004 | ||
1005 | You should always do this: | |
1006 | ||
1007 | libfoo.so -> SONAME -> Arbitrary package-chosen name. | |
1008 | ||
1009 | e.g. libfoo.so -> libfoo.so.1 -> libfooimp.so.9.99. | |
1010 | Given a SONAME of libfoo.so.1. | |
1011 | ||
1012 | You should *never* do this: | |
1013 | ||
1014 | libfoo.so -> libfooimp.so.9.99 | |
1015 | ||
1016 | If you do, and your SONAME is libfoo.so.1, then libfoo.so | |
1017 | fails to point at the SONAME. In that case ldconfig may consider | |
1018 | libfoo.so as another implementation of SONAME and will create | |
1019 | symlinks against it causing problems when you try to upgrade | |
1020 | or downgrade. The problems will arise because ldconfig will, | |
1021 | depending on directory ordering, creat symlinks against libfoo.so | |
1022 | e.g. libfoo.so.1.2 -> libfoo.so, but when libfoo.so is removed | |
1023 | (typically by the removal of a development pacakge not required | |
1024 | for the runtime) it will break the libfoo.so.1.2 symlink and the | |
1025 | application will fail to start. */ | |
2fe98a4a | 1026 | const char *real_base_name = basename (real_file_name); |
82d8607d UD |
1027 | |
1028 | if (strcmp (real_base_name, soname) != 0) | |
1029 | { | |
1030 | len = strlen (real_base_name); | |
1031 | if (len < strlen (".so") | |
1032 | || strcmp (real_base_name + len - strlen (".so"), ".so") != 0 | |
1033 | || strncmp (real_base_name, soname, len) != 0) | |
1034 | is_link = 0; | |
1035 | } | |
27d9ffda | 1036 | } |
45eca4d1 | 1037 | |
395412a0 UD |
1038 | if (real_name != real_file_name) |
1039 | free (real_name); | |
1040 | ||
82d8607d UD |
1041 | if (is_link) |
1042 | { | |
1043 | free (soname); | |
1044 | soname = xstrdup (direntry->d_name); | |
1045 | } | |
1046 | ||
591e1ffb UD |
1047 | if (flag == FLAG_ELF |
1048 | && (entry->flag == FLAG_ELF_LIBC5 | |
1049 | || entry->flag == FLAG_ELF_LIBC6)) | |
1050 | flag = entry->flag; | |
27d9ffda | 1051 | |
591e1ffb UD |
1052 | /* Some sanity checks to print warnings. */ |
1053 | if (opt_verbose) | |
1054 | { | |
1055 | if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5 | |
1056 | && entry->flag != FLAG_ANY) | |
7b0d235c | 1057 | error (0, 0, _("libc5 library %s in wrong directory"), file_name); |
591e1ffb UD |
1058 | if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6 |
1059 | && entry->flag != FLAG_ANY) | |
7b0d235c | 1060 | error (0, 0, _("libc6 library %s in wrong directory"), file_name); |
591e1ffb UD |
1061 | if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4 |
1062 | && entry->flag != FLAG_ANY) | |
7b0d235c | 1063 | error (0, 0, _("libc4 library %s in wrong directory"), file_name); |
591e1ffb | 1064 | } |
45eca4d1 | 1065 | |
591e1ffb | 1066 | /* Add library to list. */ |
27d9ffda | 1067 | struct dlib_entry *dlib_ptr; |
591e1ffb UD |
1068 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) |
1069 | { | |
1070 | /* Is soname already in list? */ | |
1071 | if (strcmp (dlib_ptr->soname, soname) == 0) | |
1072 | { | |
1073 | /* Prefer a file to a link, otherwise check which one | |
1074 | is newer. */ | |
1075 | if ((!is_link && dlib_ptr->is_link) | |
1076 | || (is_link == dlib_ptr->is_link | |
45eca4d1 | 1077 | && _dl_cache_libcmp (dlib_ptr->name, direntry->d_name) < 0)) |
591e1ffb UD |
1078 | { |
1079 | /* It's newer - add it. */ | |
1080 | /* Flag should be the same - sanity check. */ | |
1081 | if (dlib_ptr->flag != flag) | |
1082 | { | |
1083 | if (dlib_ptr->flag == FLAG_ELF | |
1084 | && (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6)) | |
1085 | dlib_ptr->flag = flag; | |
1086 | else if ((dlib_ptr->flag == FLAG_ELF_LIBC5 | |
1087 | || dlib_ptr->flag == FLAG_ELF_LIBC6) | |
1088 | && flag == FLAG_ELF) | |
1089 | dlib_ptr->flag = flag; | |
1090 | else | |
1091 | error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), | |
27d9ffda UD |
1092 | dlib_ptr->name, direntry->d_name, |
1093 | entry->path); | |
591e1ffb UD |
1094 | } |
1095 | free (dlib_ptr->name); | |
1096 | dlib_ptr->name = xstrdup (direntry->d_name); | |
1097 | dlib_ptr->is_link = is_link; | |
27d9ffda | 1098 | dlib_ptr->osversion = osversion; |
591e1ffb UD |
1099 | } |
1100 | /* Don't add this library, abort loop. */ | |
1101 | /* Also free soname, since it's dynamically allocated. */ | |
1102 | free (soname); | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | /* Add the library if it's not already in. */ | |
1107 | if (dlib_ptr == NULL) | |
1108 | { | |
1109 | dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry)); | |
1110 | dlib_ptr->name = xstrdup (direntry->d_name); | |
591e1ffb | 1111 | dlib_ptr->soname = soname; |
27d9ffda | 1112 | dlib_ptr->flag = flag; |
591e1ffb | 1113 | dlib_ptr->is_link = is_link; |
27d9ffda | 1114 | dlib_ptr->osversion = osversion; |
591e1ffb UD |
1115 | /* Add at head of list. */ |
1116 | dlib_ptr->next = dlibs; | |
1117 | dlibs = dlib_ptr; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | closedir (dir); | |
1122 | ||
1123 | /* Now dlibs contains a list of all libs - add those to the cache | |
1124 | and created all symbolic links. */ | |
27d9ffda | 1125 | struct dlib_entry *dlib_ptr; |
591e1ffb UD |
1126 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) |
1127 | { | |
b44ac4f4 FW |
1128 | /* The cached file name is the soname for non-glibc-hwcaps |
1129 | subdirectories (relying on symbolic links; this helps with | |
1130 | library updates that change the file name), and the actual | |
1131 | file for glibc-hwcaps subdirectories. */ | |
1132 | const char *filename; | |
1133 | if (entry->hwcaps == NULL) | |
1134 | { | |
1135 | /* Don't create links to links. */ | |
1136 | if (dlib_ptr->is_link == 0) | |
1137 | create_links (dir_name, entry->path, dlib_ptr->name, | |
1138 | dlib_ptr->soname); | |
1139 | filename = dlib_ptr->soname; | |
1140 | } | |
1141 | else | |
1142 | { | |
1143 | /* Do not create links in glibc-hwcaps subdirectories, but | |
1144 | still log the cache addition. */ | |
1145 | if (opt_verbose) | |
1146 | printf ("\t%s -> %s\n", dlib_ptr->soname, dlib_ptr->name); | |
1147 | filename = dlib_ptr->name; | |
1148 | } | |
591e1ffb | 1149 | if (opt_build_cache) |
b44ac4f4 FW |
1150 | add_to_cache (entry->path, filename, dlib_ptr->soname, |
1151 | dlib_ptr->flag, dlib_ptr->osversion, | |
1152 | hwcap, entry->hwcaps); | |
591e1ffb UD |
1153 | } |
1154 | ||
1155 | /* Free all resources. */ | |
45eca4d1 | 1156 | while (dlibs) |
591e1ffb UD |
1157 | { |
1158 | dlib_ptr = dlibs; | |
1159 | free (dlib_ptr->soname); | |
1160 | free (dlib_ptr->name); | |
1161 | dlibs = dlibs->next; | |
1162 | free (dlib_ptr); | |
1163 | } | |
b4a555d6 UD |
1164 | |
1165 | if (opt_chroot && dir_name) | |
1166 | free (dir_name); | |
591e1ffb UD |
1167 | } |
1168 | ||
1169 | /* Search through all libraries. */ | |
1170 | static void | |
1171 | search_dirs (void) | |
1172 | { | |
1173 | struct dir_entry *entry; | |
1174 | ||
1175 | for (entry = dir_entries; entry != NULL; entry = entry->next) | |
1176 | search_dir (entry); | |
1177 | ||
1178 | /* Free all allocated memory. */ | |
1179 | while (dir_entries) | |
1180 | { | |
1181 | entry = dir_entries; | |
1182 | dir_entries = dir_entries->next; | |
1183 | free (entry->path); | |
1184 | free (entry); | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | ||
8e115d80 | 1189 | static void parse_conf_include (const char *config_file, unsigned int lineno, |
a334319f | 1190 | bool do_chroot, const char *pattern); |
8e115d80 | 1191 | |
591e1ffb UD |
1192 | /* Parse configuration file. */ |
1193 | static void | |
a334319f | 1194 | parse_conf (const char *filename, bool do_chroot) |
591e1ffb | 1195 | { |
b4a555d6 | 1196 | FILE *file = NULL; |
591e1ffb | 1197 | char *line = NULL; |
b4a555d6 | 1198 | const char *canon; |
591e1ffb | 1199 | size_t len = 0; |
8e115d80 | 1200 | unsigned int lineno; |
45eca4d1 | 1201 | |
8e115d80 | 1202 | if (do_chroot && opt_chroot) |
b4a555d6 UD |
1203 | { |
1204 | canon = chroot_canon (opt_chroot, filename); | |
1205 | if (canon) | |
1206 | file = fopen (canon, "r"); | |
1207 | else | |
1208 | canon = filename; | |
1209 | } | |
1210 | else | |
1211 | { | |
1212 | canon = filename; | |
1213 | file = fopen (filename, "r"); | |
1214 | } | |
591e1ffb UD |
1215 | |
1216 | if (file == NULL) | |
1217 | { | |
b5a1271c FW |
1218 | if (errno != ENOENT) |
1219 | error (0, errno, _("\ | |
1db86e88 | 1220 | Warning: ignoring configuration file that cannot be opened: %s"), |
b5a1271c | 1221 | canon); |
b4a555d6 UD |
1222 | if (canon != filename) |
1223 | free ((char *) canon); | |
591e1ffb UD |
1224 | return; |
1225 | } | |
1226 | ||
c96873d7 UD |
1227 | /* No threads use this stream. */ |
1228 | __fsetlocking (file, FSETLOCKING_BYCALLER); | |
1229 | ||
b4a555d6 UD |
1230 | if (canon != filename) |
1231 | free ((char *) canon); | |
1232 | ||
8e115d80 | 1233 | lineno = 0; |
591e1ffb UD |
1234 | do |
1235 | { | |
1236 | ssize_t n = getline (&line, &len, file); | |
1237 | if (n < 0) | |
1238 | break; | |
1239 | ||
8e115d80 | 1240 | ++lineno; |
591e1ffb UD |
1241 | if (line[n - 1] == '\n') |
1242 | line[n - 1] = '\0'; | |
1243 | ||
1244 | /* Because the file format does not know any form of quoting we | |
1245 | can search forward for the next '#' character and if found | |
1246 | make it terminating the line. */ | |
1247 | *strchrnul (line, '#') = '\0'; | |
1248 | ||
69acbe9f UD |
1249 | /* Remove leading whitespace. NUL is no whitespace character. */ |
1250 | char *cp = line; | |
1251 | while (isspace (*cp)) | |
1252 | ++cp; | |
1253 | ||
591e1ffb | 1254 | /* If the line is blank it is ignored. */ |
69acbe9f | 1255 | if (cp[0] == '\0') |
591e1ffb UD |
1256 | continue; |
1257 | ||
8e115d80 RM |
1258 | if (!strncmp (cp, "include", 7) && isblank (cp[7])) |
1259 | { | |
1260 | char *dir; | |
1261 | cp += 8; | |
1262 | while ((dir = strsep (&cp, " \t")) != NULL) | |
1263 | if (dir[0] != '\0') | |
a334319f | 1264 | parse_conf_include (filename, lineno, do_chroot, dir); |
8e115d80 | 1265 | } |
ab1d521d | 1266 | else if (!strncasecmp (cp, "hwcap", 5) && isblank (cp[5])) |
31563b68 | 1267 | error (0, 0, _("%s:%u: hwcap directive ignored"), filename, lineno); |
8e115d80 | 1268 | else |
b7176cc2 | 1269 | add_dir_1 (cp, filename, lineno); |
69acbe9f UD |
1270 | } |
1271 | while (!feof_unlocked (file)); | |
591e1ffb UD |
1272 | |
1273 | /* Free buffer and close file. */ | |
1274 | free (line); | |
1275 | fclose (file); | |
1276 | } | |
1277 | ||
8e115d80 RM |
1278 | /* Handle one word in an `include' line, a glob pattern of additional |
1279 | config files to read. */ | |
1280 | static void | |
1281 | parse_conf_include (const char *config_file, unsigned int lineno, | |
a334319f | 1282 | bool do_chroot, const char *pattern) |
8e115d80 RM |
1283 | { |
1284 | if (opt_chroot && pattern[0] != '/') | |
1285 | error (EXIT_FAILURE, 0, | |
1286 | _("need absolute file name for configuration file when using -r")); | |
1287 | ||
1288 | char *copy = NULL; | |
1289 | if (pattern[0] != '/' && strchr (config_file, '/') != NULL) | |
1290 | { | |
322861e8 UD |
1291 | if (asprintf (©, "%s/%s", dirname (strdupa (config_file)), |
1292 | pattern) < 0) | |
1293 | error (EXIT_FAILURE, 0, _("memory exhausted")); | |
8e115d80 RM |
1294 | pattern = copy; |
1295 | } | |
1296 | ||
1297 | glob64_t gl; | |
1298 | int result; | |
1299 | if (do_chroot && opt_chroot) | |
1300 | { | |
1301 | char *canon = chroot_canon (opt_chroot, pattern); | |
49bd556d UD |
1302 | if (canon == NULL) |
1303 | return; | |
1304 | result = glob64 (canon, 0, NULL, &gl); | |
8e115d80 RM |
1305 | free (canon); |
1306 | } | |
1307 | else | |
1308 | result = glob64 (pattern, 0, NULL, &gl); | |
1309 | ||
1310 | switch (result) | |
1311 | { | |
1312 | case 0: | |
1313 | for (size_t i = 0; i < gl.gl_pathc; ++i) | |
a334319f | 1314 | parse_conf (gl.gl_pathv[i], false); |
8e115d80 RM |
1315 | globfree64 (&gl); |
1316 | break; | |
1317 | ||
1318 | case GLOB_NOMATCH: | |
1319 | break; | |
1320 | ||
1321 | case GLOB_NOSPACE: | |
1322 | errno = ENOMEM; | |
32db86d5 | 1323 | /* Fall through. */ |
8e115d80 RM |
1324 | case GLOB_ABORTED: |
1325 | if (opt_verbose) | |
1326 | error (0, errno, _("%s:%u: cannot read directory %s"), | |
1327 | config_file, lineno, pattern); | |
1328 | break; | |
1329 | ||
1330 | default: | |
1331 | abort (); | |
1332 | break; | |
1333 | } | |
1334 | ||
72e6cdfa | 1335 | free (copy); |
8e115d80 RM |
1336 | } |
1337 | ||
0cfbb8c6 UD |
1338 | /* Honour LD_HWCAP_MASK. */ |
1339 | static void | |
1340 | set_hwcap (void) | |
1341 | { | |
1342 | char *mask = getenv ("LD_HWCAP_MASK"); | |
1343 | ||
1344 | if (mask) | |
1345 | hwcap_mask = strtoul (mask, NULL, 0); | |
1346 | } | |
1347 | ||
591e1ffb UD |
1348 | |
1349 | int | |
1350 | main (int argc, char **argv) | |
1351 | { | |
11bf311e UD |
1352 | /* Set locale via LC_ALL. */ |
1353 | setlocale (LC_ALL, ""); | |
1354 | ||
7d38eb38 AJ |
1355 | /* But keep the C collation. That way `include' directives using |
1356 | globbing patterns are processed in a locale-independent order. */ | |
1357 | setlocale (LC_COLLATE, "C"); | |
1358 | ||
11bf311e UD |
1359 | /* Set the text message domain. */ |
1360 | textdomain (_libc_intl_domainname); | |
45eca4d1 | 1361 | |
591e1ffb | 1362 | /* Parse and process arguments. */ |
11bf311e | 1363 | int remaining; |
591e1ffb UD |
1364 | argp_parse (&argp, argc, argv, 0, &remaining, NULL); |
1365 | ||
11bf8ce1 | 1366 | /* Remaining arguments are additional directories if opt_manual_link |
b85697f6 UD |
1367 | is not set. */ |
1368 | if (remaining != argc && !opt_manual_link) | |
591e1ffb UD |
1369 | { |
1370 | int i; | |
1371 | for (i = remaining; i < argc; ++i) | |
11bf8ce1 UD |
1372 | if (opt_build_cache && argv[i][0] != '/') |
1373 | error (EXIT_FAILURE, 0, | |
1374 | _("relative path `%s' used to build cache"), | |
1375 | argv[i]); | |
1376 | else | |
b7176cc2 | 1377 | add_dir_1 (argv[i], "<cmdline>", 0); |
591e1ffb UD |
1378 | } |
1379 | ||
0cfbb8c6 UD |
1380 | set_hwcap (); |
1381 | ||
591e1ffb UD |
1382 | if (opt_chroot) |
1383 | { | |
f0189a54 | 1384 | /* Normalize the path a bit, we might need it for printing later. */ |
616d9133 | 1385 | char *endp = rawmemchr (opt_chroot, '\0'); |
b4a555d6 | 1386 | while (endp > opt_chroot && endp[-1] == '/') |
f0189a54 UD |
1387 | --endp; |
1388 | *endp = '\0'; | |
b4a555d6 UD |
1389 | if (endp == opt_chroot) |
1390 | opt_chroot = NULL; | |
f0189a54 | 1391 | |
b4a555d6 UD |
1392 | if (opt_chroot) |
1393 | { | |
1394 | /* It is faster to use chroot if we can. */ | |
1395 | if (!chroot (opt_chroot)) | |
1396 | { | |
1397 | if (chdir ("/")) | |
1398 | error (EXIT_FAILURE, errno, _("Can't chdir to /")); | |
1399 | opt_chroot = NULL; | |
1400 | } | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | if (cache_file == NULL) | |
1405 | { | |
1406 | cache_file = alloca (strlen (LD_SO_CACHE) + 1); | |
1407 | strcpy (cache_file, LD_SO_CACHE); | |
591e1ffb UD |
1408 | } |
1409 | ||
b4a555d6 UD |
1410 | if (config_file == NULL) |
1411 | config_file = LD_SO_CONF; | |
1412 | ||
591e1ffb UD |
1413 | if (opt_print_cache) |
1414 | { | |
b4a555d6 UD |
1415 | if (opt_chroot) |
1416 | { | |
1417 | char *p = chroot_canon (opt_chroot, cache_file); | |
1418 | if (p == NULL) | |
1419 | error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"), | |
1420 | cache_file); | |
1421 | cache_file = p; | |
1422 | } | |
591e1ffb | 1423 | print_cache (cache_file); |
b4a555d6 UD |
1424 | if (opt_chroot) |
1425 | free (cache_file); | |
591e1ffb UD |
1426 | exit (0); |
1427 | } | |
1428 | ||
b4a555d6 UD |
1429 | if (opt_chroot) |
1430 | { | |
1431 | /* Canonicalize the directory name of cache_file, not cache_file, | |
27d9ffda | 1432 | because we'll rename a temporary cache file to it. */ |
b4a555d6 UD |
1433 | char *p = strrchr (cache_file, '/'); |
1434 | char *canon = chroot_canon (opt_chroot, | |
1435 | p ? (*p = '\0', cache_file) : "/"); | |
1436 | ||
1437 | if (canon == NULL) | |
4bc2bcba UD |
1438 | error (EXIT_FAILURE, errno, |
1439 | _("Can't open cache file directory %s\n"), | |
1440 | p ? cache_file : "/"); | |
b4a555d6 UD |
1441 | |
1442 | if (p) | |
1443 | ++p; | |
1444 | else | |
1445 | p = cache_file; | |
1446 | ||
1447 | cache_file = alloca (strlen (canon) + strlen (p) + 2); | |
1448 | sprintf (cache_file, "%s/%s", canon, p); | |
1449 | free (canon); | |
1450 | } | |
1451 | ||
b85697f6 UD |
1452 | if (opt_manual_link) |
1453 | { | |
1454 | /* Link all given libraries manually. */ | |
1455 | int i; | |
1456 | ||
1457 | for (i = remaining; i < argc; ++i) | |
a986484f | 1458 | manual_link (argv[i]); |
b85697f6 UD |
1459 | |
1460 | exit (0); | |
1461 | } | |
45eca4d1 UD |
1462 | |
1463 | ||
591e1ffb UD |
1464 | if (opt_build_cache) |
1465 | init_cache (); | |
1466 | ||
1467 | if (!opt_only_cline) | |
1468 | { | |
a334319f | 1469 | parse_conf (config_file, true); |
334fcf2a | 1470 | |
591e1ffb | 1471 | /* Always add the standard search paths. */ |
bd89c0b5 | 1472 | add_system_dir (SLIBDIR); |
8ca91b36 | 1473 | if (strcmp (SLIBDIR, LIBDIR)) |
bd89c0b5 | 1474 | add_system_dir (LIBDIR); |
591e1ffb | 1475 | } |
45eca4d1 | 1476 | |
3f7dcb2b | 1477 | const char *aux_cache_file = _PATH_LDCONFIG_AUX_CACHE; |
4bc2bcba | 1478 | if (opt_chroot) |
6db52fbb | 1479 | aux_cache_file = chroot_canon (opt_chroot, aux_cache_file); |
4bc2bcba | 1480 | |
6db52fbb | 1481 | if (! opt_ignore_aux_cache && aux_cache_file) |
4bc2bcba | 1482 | load_aux_cache (aux_cache_file); |
27d9ffda UD |
1483 | else |
1484 | init_aux_cache (); | |
1485 | ||
591e1ffb UD |
1486 | search_dirs (); |
1487 | ||
1488 | if (opt_build_cache) | |
27d9ffda UD |
1489 | { |
1490 | save_cache (cache_file); | |
6db52fbb | 1491 | if (aux_cache_file) |
c0dafcf1 | 1492 | save_aux_cache (aux_cache_file); |
27d9ffda | 1493 | } |
591e1ffb UD |
1494 | |
1495 | return 0; | |
1496 | } |