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581c785b | 1 | /* Copyright (C) 1999-2022 Free Software Foundation, Inc. |
591e1ffb | 2 | This file is part of the GNU C Library. |
591e1ffb | 3 | |
43bc8ac6 | 4 | This program is free software; you can redistribute it and/or modify |
2e2efe65 RM |
5 | it under the terms of the GNU General Public License as published |
6 | by the Free Software Foundation; version 2 of the License, or | |
7 | (at your option) any later version. | |
591e1ffb | 8 | |
43bc8ac6 | 9 | This program is distributed in the hope that it will be useful, |
591e1ffb | 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
43bc8ac6 UD |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. | |
591e1ffb | 13 | |
43bc8ac6 | 14 | You should have received a copy of the GNU General Public License |
5a82c748 | 15 | along with this program; if not, see <https://www.gnu.org/licenses/>. */ |
591e1ffb | 16 | |
ee600e3f | 17 | #define PROCINFO_CLASS static |
b44ac4f4 | 18 | #include <assert.h> |
7b0d235c | 19 | #include <alloca.h> |
591e1ffb UD |
20 | #include <argp.h> |
21 | #include <dirent.h> | |
9c95d361 | 22 | #include <elf.h> |
591e1ffb UD |
23 | #include <error.h> |
24 | #include <errno.h> | |
5a35dfca | 25 | #include <inttypes.h> |
591e1ffb | 26 | #include <libintl.h> |
11bf311e | 27 | #include <locale.h> |
f57ebe29 | 28 | #include <stdbool.h> |
591e1ffb | 29 | #include <stdio.h> |
c96873d7 | 30 | #include <stdio_ext.h> |
591e1ffb UD |
31 | #include <stdlib.h> |
32 | #include <string.h> | |
33 | #include <unistd.h> | |
e054f494 | 34 | #include <stdint.h> |
591e1ffb UD |
35 | #include <sys/fcntl.h> |
36 | #include <sys/mman.h> | |
37 | #include <sys/stat.h> | |
38 | #include <sys/types.h> | |
8e115d80 RM |
39 | #include <glob.h> |
40 | #include <libgen.h> | |
591e1ffb | 41 | |
8f480b4b RM |
42 | #include <ldconfig.h> |
43 | #include <dl-cache.h> | |
b44ac4f4 | 44 | #include <dl-hwcaps.h> |
6bf789d6 | 45 | #include <dl-is_dso.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 | /* List of directories to handle. */ |
69 | struct dir_entry | |
70 | { | |
71 | char *path; | |
72 | int flag; | |
4ceae915 AJ |
73 | ino64_t ino; |
74 | dev_t dev; | |
b7176cc2 DD |
75 | const char *from_file; |
76 | int from_line; | |
b44ac4f4 FW |
77 | |
78 | /* Non-NULL for subdirectories under a glibc-hwcaps subdirectory. */ | |
79 | struct glibc_hwcaps_subdirectory *hwcaps; | |
80 | ||
591e1ffb UD |
81 | struct dir_entry *next; |
82 | }; | |
83 | ||
84 | /* The list is unsorted, contains no duplicates. Entries are added at | |
85 | the end. */ | |
86 | static struct dir_entry *dir_entries; | |
87 | ||
88 | /* Flags for different options. */ | |
89 | /* Print Cache. */ | |
c96873d7 | 90 | static int opt_print_cache; |
591e1ffb UD |
91 | |
92 | /* Be verbose. */ | |
c96873d7 | 93 | int opt_verbose; |
591e1ffb | 94 | |
45eca4d1 | 95 | /* Format to support. */ |
db07fae8 | 96 | enum opt_format opt_format = opt_format_new; |
45eca4d1 | 97 | |
591e1ffb UD |
98 | /* Build cache. */ |
99 | static int opt_build_cache = 1; | |
100 | ||
920b35c9 FW |
101 | /* Enable symbolic link processing. If set, create or update symbolic |
102 | links, and remove stale symbolic links. */ | |
591e1ffb UD |
103 | static int opt_link = 1; |
104 | ||
105 | /* Only process directories specified on the command line. */ | |
c96873d7 | 106 | static int opt_only_cline; |
591e1ffb UD |
107 | |
108 | /* Path to root for chroot. */ | |
109 | static char *opt_chroot; | |
110 | ||
b85697f6 | 111 | /* Manually link given shared libraries. */ |
c96873d7 | 112 | static int opt_manual_link; |
b85697f6 | 113 | |
27d9ffda UD |
114 | /* Should we ignore an old auxiliary cache file? */ |
115 | static int opt_ignore_aux_cache; | |
116 | ||
591e1ffb | 117 | /* Cache file to use. */ |
b4a555d6 | 118 | static char *cache_file; |
591e1ffb UD |
119 | |
120 | /* Configuration file. */ | |
121 | static const char *config_file; | |
122 | ||
0cfbb8c6 UD |
123 | /* Mask to use for important hardware capabilities. */ |
124 | static unsigned long int hwcap_mask = HWCAP_IMPORTANT; | |
125 | ||
591e1ffb UD |
126 | /* Name and version of program. */ |
127 | static void print_version (FILE *stream, struct argp_state *state); | |
128 | void (*argp_program_version_hook) (FILE *, struct argp_state *) | |
129 | = print_version; | |
130 | ||
cbbcaf23 UD |
131 | /* Function to print some extra text in the help message. */ |
132 | static char *more_help (int key, const char *text, void *input); | |
133 | ||
591e1ffb UD |
134 | /* Definitions of arguments for argp functions. */ |
135 | static const struct argp_option options[] = | |
136 | { | |
137 | { "print-cache", 'p', NULL, 0, N_("Print cache"), 0}, | |
138 | { "verbose", 'v', NULL, 0, N_("Generate verbose messages"), 0}, | |
139 | { NULL, 'N', NULL, 0, N_("Don't build cache"), 0}, | |
920b35c9 | 140 | { NULL, 'X', NULL, 0, N_("Don't update symbolic links"), 0}, |
7864c09b UD |
141 | { NULL, 'r', N_("ROOT"), 0, N_("Change to and use ROOT as root directory"), 0}, |
142 | { NULL, 'C', N_("CACHE"), 0, N_("Use CACHE as cache file"), 0}, | |
143 | { NULL, 'f', N_("CONF"), 0, N_("Use CONF as configuration file"), 0}, | |
591e1ffb | 144 | { NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0}, |
b85697f6 | 145 | { NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0}, |
cad64f77 | 146 | { "format", 'c', N_("FORMAT"), 0, N_("Format to use: new (default), old, or compat"), 0}, |
27d9ffda | 147 | { "ignore-aux-cache", 'i', NULL, 0, N_("Ignore auxiliary cache file"), 0}, |
591e1ffb UD |
148 | { NULL, 0, NULL, 0, NULL, 0 } |
149 | }; | |
150 | ||
11bf8ce1 UD |
151 | #define PROCINFO_CLASS static |
152 | #include <dl-procinfo.c> | |
153 | ||
591e1ffb UD |
154 | /* Short description of program. */ |
155 | static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings."); | |
156 | ||
157 | /* Prototype for option handler. */ | |
158 | static error_t parse_opt (int key, char *arg, struct argp_state *state); | |
159 | ||
160 | /* Data structure to communicate with argp functions. */ | |
161 | static struct argp argp = | |
162 | { | |
cbbcaf23 | 163 | options, parse_opt, NULL, doc, NULL, more_help, NULL |
591e1ffb UD |
164 | }; |
165 | ||
a6c1c03a AJ |
166 | /* Check if string corresponds to an important hardware capability or |
167 | a platform. */ | |
45eca4d1 | 168 | static int |
a6c1c03a | 169 | is_hwcap_platform (const char *name) |
45eca4d1 UD |
170 | { |
171 | int hwcap_idx = _dl_string_hwcap (name); | |
8ca91b36 | 172 | |
13e23af7 | 173 | /* Is this a normal hwcap for the machine like "fpu?" */ |
0cfbb8c6 | 174 | if (hwcap_idx != -1 && ((1 << hwcap_idx) & hwcap_mask)) |
45eca4d1 | 175 | return 1; |
a6c1c03a | 176 | |
13e23af7 | 177 | /* Is this a platform pseudo-hwcap like "i686?" */ |
a6c1c03a AJ |
178 | hwcap_idx = _dl_string_platform (name); |
179 | if (hwcap_idx != -1) | |
180 | return 1; | |
181 | ||
31563b68 FW |
182 | /* Backwards-compatibility for the "tls" subdirectory. */ |
183 | if (strcmp (name, TLS_SUBPATH) == 0) | |
184 | return 1; | |
676fde70 | 185 | |
45eca4d1 UD |
186 | return 0; |
187 | } | |
188 | ||
a6c1c03a AJ |
189 | /* Get hwcap (including platform) encoding of path. */ |
190 | static uint64_t | |
45eca4d1 UD |
191 | path_hwcap (const char *path) |
192 | { | |
193 | char *str = xstrdup (path); | |
194 | char *ptr; | |
a6c1c03a AJ |
195 | uint64_t hwcap = 0; |
196 | uint64_t h; | |
45eca4d1 UD |
197 | |
198 | size_t len; | |
199 | ||
200 | len = strlen (str); | |
201 | if (str[len] == '/') | |
202 | str[len] = '\0'; | |
203 | ||
204 | /* Search pathname from the end and check for hwcap strings. */ | |
205 | for (;;) | |
206 | { | |
207 | ptr = strrchr (str, '/'); | |
208 | ||
209 | if (ptr == NULL) | |
210 | break; | |
211 | ||
a6c1c03a | 212 | h = _dl_string_hwcap (ptr + 1); |
45eca4d1 | 213 | |
59553897 UD |
214 | if (h == (uint64_t) -1) |
215 | { | |
216 | h = _dl_string_platform (ptr + 1); | |
217 | if (h == (uint64_t) -1) | |
676fde70 | 218 | { |
31563b68 FW |
219 | if (strcmp (ptr + 1, TLS_SUBPATH) == 0) |
220 | h = TLS_HWCAP_BIT; | |
221 | else | |
676fde70 UD |
222 | break; |
223 | } | |
59553897 | 224 | } |
a6c1c03a | 225 | hwcap += 1ULL << h; |
591e1ffb | 226 | |
45eca4d1 UD |
227 | /* Search the next part of the path. */ |
228 | *ptr = '\0'; | |
229 | } | |
230 | ||
231 | free (str); | |
232 | return hwcap; | |
233 | } | |
591e1ffb UD |
234 | |
235 | /* Handle program arguments. */ | |
236 | static error_t | |
237 | parse_opt (int key, char *arg, struct argp_state *state) | |
238 | { | |
239 | switch (key) | |
240 | { | |
241 | case 'C': | |
242 | cache_file = arg; | |
27d9ffda UD |
243 | /* Ignore auxiliary cache since we use non-standard cache. */ |
244 | opt_ignore_aux_cache = 1; | |
591e1ffb UD |
245 | break; |
246 | case 'f': | |
247 | config_file = arg; | |
248 | break; | |
27d9ffda UD |
249 | case 'i': |
250 | opt_ignore_aux_cache = 1; | |
251 | break; | |
b85697f6 UD |
252 | case 'l': |
253 | opt_manual_link = 1; | |
254 | break; | |
591e1ffb UD |
255 | case 'N': |
256 | opt_build_cache = 0; | |
257 | break; | |
258 | case 'n': | |
259 | opt_build_cache = 0; | |
260 | opt_only_cline = 1; | |
261 | break; | |
262 | case 'p': | |
263 | opt_print_cache = 1; | |
264 | break; | |
265 | case 'r': | |
266 | opt_chroot = arg; | |
267 | break; | |
268 | case 'v': | |
269 | opt_verbose = 1; | |
270 | break; | |
271 | case 'X': | |
272 | opt_link = 0; | |
273 | break; | |
45eca4d1 UD |
274 | case 'c': |
275 | if (strcmp (arg, "old") == 0) | |
db07fae8 | 276 | opt_format = opt_format_old; |
45eca4d1 | 277 | else if (strcmp (arg, "compat") == 0) |
db07fae8 | 278 | opt_format = opt_format_compat; |
45eca4d1 | 279 | else if (strcmp (arg, "new") == 0) |
db07fae8 | 280 | opt_format = opt_format_new; |
45eca4d1 | 281 | break; |
591e1ffb UD |
282 | default: |
283 | return ARGP_ERR_UNKNOWN; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
cbbcaf23 UD |
289 | /* Print bug-reporting information in the help message. */ |
290 | static char * | |
291 | more_help (int key, const char *text, void *input) | |
292 | { | |
8b748aed | 293 | char *tp = NULL; |
cbbcaf23 UD |
294 | switch (key) |
295 | { | |
296 | case ARGP_KEY_HELP_EXTRA: | |
297 | /* We print some extra information. */ | |
8b748aed | 298 | if (asprintf (&tp, gettext ("\ |
cbbcaf23 | 299 | For bug reporting instructions, please see:\n\ |
8b748aed JM |
300 | %s.\n"), REPORT_BUGS_TO) < 0) |
301 | return NULL; | |
302 | return tp; | |
cbbcaf23 UD |
303 | default: |
304 | break; | |
305 | } | |
306 | return (char *) text; | |
307 | } | |
308 | ||
591e1ffb UD |
309 | /* Print the version information. */ |
310 | static void | |
311 | print_version (FILE *stream, struct argp_state *state) | |
312 | { | |
8b748aed | 313 | fprintf (stream, "ldconfig %s%s\n", PKGVERSION, VERSION); |
591e1ffb UD |
314 | fprintf (stream, gettext ("\ |
315 | Copyright (C) %s Free Software Foundation, Inc.\n\ | |
316 | This is free software; see the source for copying conditions. There is NO\n\ | |
317 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ | |
634b5eba | 318 | "), "2022"); |
591e1ffb UD |
319 | fprintf (stream, gettext ("Written by %s.\n"), |
320 | "Andreas Jaeger"); | |
321 | } | |
322 | ||
5e598c2b FW |
323 | /* Allocate a new subdirectory with full path PATH under ENTRY, using |
324 | inode data from *ST. */ | |
325 | static struct dir_entry * | |
326 | new_sub_entry (const struct dir_entry *entry, const char *path, | |
9fe6f636 | 327 | const struct stat *st) |
5e598c2b FW |
328 | { |
329 | struct dir_entry *new_entry = xmalloc (sizeof (struct dir_entry)); | |
330 | new_entry->from_file = entry->from_file; | |
331 | new_entry->from_line = entry->from_line; | |
332 | new_entry->path = xstrdup (path); | |
333 | new_entry->flag = entry->flag; | |
b44ac4f4 | 334 | new_entry->hwcaps = NULL; |
5e598c2b FW |
335 | new_entry->next = NULL; |
336 | new_entry->ino = st->st_ino; | |
337 | new_entry->dev = st->st_dev; | |
338 | return new_entry; | |
339 | } | |
340 | ||
b44ac4f4 FW |
341 | /* Add a single directory entry. Return true if the directory is |
342 | actually added (because it is not a duplicate). */ | |
343 | static bool | |
a8fd59b0 AJ |
344 | add_single_dir (struct dir_entry *entry, int verbose) |
345 | { | |
346 | struct dir_entry *ptr, *prev; | |
b44ac4f4 | 347 | bool added = true; |
a8fd59b0 AJ |
348 | |
349 | ptr = dir_entries; | |
350 | prev = ptr; | |
351 | while (ptr != NULL) | |
352 | { | |
353 | /* Check for duplicates. */ | |
4ceae915 | 354 | if (ptr->ino == entry->ino && ptr->dev == entry->dev) |
a8fd59b0 AJ |
355 | { |
356 | if (opt_verbose && verbose) | |
b7176cc2 DD |
357 | { |
358 | error (0, 0, _("Path `%s' given more than once"), entry->path); | |
359 | fprintf (stderr, _("(from %s:%d and %s:%d)\n"), | |
360 | entry->from_file, entry->from_line, | |
361 | ptr->from_file, ptr->from_line); | |
362 | } | |
a8fd59b0 AJ |
363 | /* Use the newer information. */ |
364 | ptr->flag = entry->flag; | |
4ceae915 | 365 | free (entry->path); |
a8fd59b0 | 366 | free (entry); |
b44ac4f4 | 367 | added = false; |
a8fd59b0 AJ |
368 | break; |
369 | } | |
370 | prev = ptr; | |
371 | ptr = ptr->next; | |
372 | } | |
373 | /* Is this the first entry? */ | |
374 | if (ptr == NULL && dir_entries == NULL) | |
375 | dir_entries = entry; | |
376 | else if (ptr == NULL) | |
377 | prev->next = entry; | |
b44ac4f4 FW |
378 | return added; |
379 | } | |
380 | ||
381 | /* Check if PATH contains a "glibc-hwcaps" subdirectory. If so, queue | |
382 | its subdirectories for glibc-hwcaps processing. */ | |
383 | static void | |
384 | add_glibc_hwcaps_subdirectories (struct dir_entry *entry, const char *path) | |
385 | { | |
386 | /* glibc-hwcaps subdirectories do not nest. */ | |
387 | assert (entry->hwcaps == NULL); | |
388 | ||
389 | char *glibc_hwcaps; | |
390 | if (asprintf (&glibc_hwcaps, "%s/" GLIBC_HWCAPS_SUBDIRECTORY, path) < 0) | |
391 | error (EXIT_FAILURE, errno, _("Could not form glibc-hwcaps path")); | |
392 | ||
393 | DIR *dir = opendir (glibc_hwcaps); | |
394 | if (dir != NULL) | |
395 | { | |
396 | while (true) | |
397 | { | |
398 | errno = 0; | |
399 | struct dirent64 *e = readdir64 (dir); | |
400 | if (e == NULL) | |
401 | { | |
402 | if (errno == 0) | |
403 | break; | |
404 | else | |
405 | error (EXIT_FAILURE, errno, _("Listing directory %s"), path); | |
406 | } | |
407 | ||
408 | /* Ignore hidden subdirectories, including "." and "..", and | |
409 | regular files. File names containing a ':' cannot be | |
410 | looked up by the dynamic loader, so skip those as | |
411 | well. */ | |
412 | if (e->d_name[0] == '.' || e->d_type == DT_REG | |
413 | || strchr (e->d_name, ':') != NULL) | |
414 | continue; | |
415 | ||
416 | /* See if this entry eventually resolves to a directory. */ | |
9fe6f636 AZ |
417 | struct stat st; |
418 | if (fstatat (dirfd (dir), e->d_name, &st, 0) < 0) | |
b44ac4f4 FW |
419 | /* Ignore unreadable entries. */ |
420 | continue; | |
421 | ||
422 | if (S_ISDIR (st.st_mode)) | |
423 | { | |
424 | /* This is a directory, so it needs to be scanned for | |
425 | libraries, associated with the hwcaps implied by the | |
426 | subdirectory name. */ | |
427 | char *new_path; | |
428 | if (asprintf (&new_path, "%s/" GLIBC_HWCAPS_SUBDIRECTORY "/%s", | |
429 | /* Use non-canonicalized path here. */ | |
430 | entry->path, e->d_name) < 0) | |
431 | error (EXIT_FAILURE, errno, | |
432 | _("Could not form glibc-hwcaps path")); | |
433 | struct dir_entry *new_entry = new_sub_entry (entry, new_path, | |
434 | &st); | |
435 | free (new_path); | |
436 | new_entry->hwcaps = new_glibc_hwcaps_subdirectory (e->d_name); | |
437 | add_single_dir (new_entry, 0); | |
438 | } | |
439 | } | |
440 | ||
441 | closedir (dir); | |
442 | } | |
443 | ||
444 | free (glibc_hwcaps); | |
a8fd59b0 AJ |
445 | } |
446 | ||
591e1ffb UD |
447 | /* Add one directory to the list of directories to process. */ |
448 | static void | |
b7176cc2 | 449 | add_dir_1 (const char *line, const char *from_file, int from_line) |
591e1ffb | 450 | { |
591e1ffb | 451 | unsigned int i; |
539842a4 | 452 | struct dir_entry *entry = xmalloc (sizeof (struct dir_entry)); |
b44ac4f4 | 453 | entry->hwcaps = NULL; |
591e1ffb | 454 | entry->next = NULL; |
45eca4d1 | 455 | |
b7176cc2 DD |
456 | entry->from_file = strdup (from_file); |
457 | entry->from_line = from_line; | |
458 | ||
591e1ffb | 459 | entry->path = xstrdup (line); |
8ee87859 | 460 | entry->flag = FLAG_ELF_LIBC6; |
591e1ffb | 461 | |
69acbe9f | 462 | /* Canonify path: for now only remove leading and trailing |
00ee369c AS |
463 | whitespace and the trailing slashes. */ |
464 | i = strlen (entry->path); | |
69acbe9f | 465 | |
00ee369c AS |
466 | while (i > 0 && isspace (entry->path[i - 1])) |
467 | entry->path[--i] = '\0'; | |
69acbe9f | 468 | |
00ee369c AS |
469 | while (i > 0 && entry->path[i - 1] == '/') |
470 | entry->path[--i] = '\0'; | |
471 | ||
472 | if (i == 0) | |
b0234d79 SP |
473 | { |
474 | free (entry->path); | |
475 | free (entry); | |
476 | return; | |
477 | } | |
45eca4d1 | 478 | |
539842a4 | 479 | char *path = entry->path; |
22866ed8 | 480 | if (opt_chroot != NULL) |
539842a4 UD |
481 | path = chroot_canon (opt_chroot, path); |
482 | ||
9fe6f636 AZ |
483 | struct stat stat_buf; |
484 | if (path == NULL || stat (path, &stat_buf)) | |
4ceae915 | 485 | { |
8645ad47 AJ |
486 | if (opt_verbose) |
487 | error (0, errno, _("Can't stat %s"), entry->path); | |
4ceae915 AJ |
488 | free (entry->path); |
489 | free (entry); | |
4ceae915 | 490 | } |
539842a4 UD |
491 | else |
492 | { | |
493 | entry->ino = stat_buf.st_ino; | |
494 | entry->dev = stat_buf.st_dev; | |
4ceae915 | 495 | |
b44ac4f4 FW |
496 | if (add_single_dir (entry, 1)) |
497 | /* Add glibc-hwcaps subdirectories if present. */ | |
498 | add_glibc_hwcaps_subdirectories (entry, path); | |
539842a4 | 499 | } |
4ceae915 | 500 | |
22866ed8 | 501 | if (opt_chroot != NULL) |
539842a4 | 502 | free (path); |
591e1ffb UD |
503 | } |
504 | ||
b7176cc2 DD |
505 | static void |
506 | add_dir (const char *line) | |
507 | { | |
508 | add_dir_1 (line, "<builtin>", 0); | |
509 | } | |
591e1ffb | 510 | |
b4a555d6 | 511 | static int |
9fe6f636 | 512 | chroot_stat (const char *real_path, const char *path, struct stat *st) |
b4a555d6 UD |
513 | { |
514 | int ret; | |
515 | char *canon_path; | |
516 | ||
517 | if (!opt_chroot) | |
9fe6f636 | 518 | return stat (real_path, st); |
b4a555d6 | 519 | |
9fe6f636 | 520 | ret = lstat (real_path, st); |
b4a555d6 UD |
521 | if (ret || !S_ISLNK (st->st_mode)) |
522 | return ret; | |
523 | ||
524 | canon_path = chroot_canon (opt_chroot, path); | |
525 | if (canon_path == NULL) | |
526 | return -1; | |
527 | ||
9fe6f636 | 528 | ret = stat (canon_path, st); |
b4a555d6 UD |
529 | free (canon_path); |
530 | return ret; | |
531 | } | |
532 | ||
591e1ffb UD |
533 | /* Create a symbolic link from soname to libname in directory path. */ |
534 | static void | |
b4a555d6 UD |
535 | create_links (const char *real_path, const char *path, const char *libname, |
536 | const char *soname) | |
591e1ffb | 537 | { |
7b0d235c | 538 | char *full_libname, *full_soname; |
b4a555d6 | 539 | char *real_full_libname, *real_full_soname; |
9fe6f636 | 540 | struct stat stat_lib, stat_so, lstat_so; |
591e1ffb UD |
541 | int do_link = 1; |
542 | int do_remove = 1; | |
543 | /* XXX: The logics in this function should be simplified. */ | |
45eca4d1 | 544 | |
591e1ffb | 545 | /* Get complete path. */ |
7b0d235c | 546 | full_libname = alloca (strlen (path) + strlen (libname) + 2); |
7c545dbe | 547 | full_soname = alloca (strlen (path) + strlen (soname) + 2); |
7b0d235c AJ |
548 | sprintf (full_libname, "%s/%s", path, libname); |
549 | sprintf (full_soname, "%s/%s", path, soname); | |
22866ed8 | 550 | if (opt_chroot != NULL) |
b4a555d6 UD |
551 | { |
552 | real_full_libname = alloca (strlen (real_path) + strlen (libname) + 2); | |
7c545dbe | 553 | real_full_soname = alloca (strlen (real_path) + strlen (soname) + 2); |
b4a555d6 UD |
554 | sprintf (real_full_libname, "%s/%s", real_path, libname); |
555 | sprintf (real_full_soname, "%s/%s", real_path, soname); | |
556 | } | |
557 | else | |
558 | { | |
559 | real_full_libname = full_libname; | |
560 | real_full_soname = full_soname; | |
561 | } | |
591e1ffb UD |
562 | |
563 | /* Does soname already exist and point to the right library? */ | |
b4a555d6 | 564 | if (chroot_stat (real_full_soname, full_soname, &stat_so) == 0) |
591e1ffb | 565 | { |
b4a555d6 | 566 | if (chroot_stat (real_full_libname, full_libname, &stat_lib)) |
591e1ffb UD |
567 | { |
568 | error (0, 0, _("Can't stat %s\n"), full_libname); | |
569 | return; | |
570 | } | |
571 | if (stat_lib.st_dev == stat_so.st_dev | |
572 | && stat_lib.st_ino == stat_so.st_ino) | |
573 | /* Link is already correct. */ | |
574 | do_link = 0; | |
9fe6f636 | 575 | else if (lstat (full_soname, &lstat_so) == 0 |
591e1ffb UD |
576 | && !S_ISLNK (lstat_so.st_mode)) |
577 | { | |
578 | error (0, 0, _("%s is not a symbolic link\n"), full_soname); | |
579 | do_link = 0; | |
580 | do_remove = 0; | |
581 | } | |
582 | } | |
9fe6f636 | 583 | else if (lstat (real_full_soname, &lstat_so) != 0 |
591e1ffb UD |
584 | || !S_ISLNK (lstat_so.st_mode)) |
585 | /* Unless it is a stale symlink, there is no need to remove. */ | |
586 | do_remove = 0; | |
587 | ||
588 | if (opt_verbose) | |
589 | printf ("\t%s -> %s", soname, libname); | |
590 | ||
591 | if (do_link && opt_link) | |
592 | { | |
593 | /* Remove old link. */ | |
594 | if (do_remove) | |
b4a555d6 | 595 | if (unlink (real_full_soname)) |
591e1ffb UD |
596 | { |
597 | error (0, 0, _("Can't unlink %s"), full_soname); | |
598 | do_link = 0; | |
599 | } | |
600 | /* Create symbolic link. */ | |
b4a555d6 | 601 | if (do_link && symlink (libname, real_full_soname)) |
591e1ffb UD |
602 | { |
603 | error (0, 0, _("Can't link %s to %s"), full_soname, libname); | |
604 | do_link = 0; | |
605 | } | |
606 | if (opt_verbose) | |
607 | { | |
608 | if (do_link) | |
609 | fputs (_(" (changed)\n"), stdout); | |
610 | else | |
611 | fputs (_(" (SKIPPED)\n"), stdout); | |
612 | } | |
613 | } | |
614 | else if (opt_verbose) | |
615 | fputs ("\n", stdout); | |
616 | } | |
617 | ||
b85697f6 UD |
618 | /* Manually link the given library. */ |
619 | static void | |
620 | manual_link (char *library) | |
621 | { | |
622 | char *path; | |
b4a555d6 UD |
623 | char *real_path; |
624 | char *real_library; | |
b85697f6 UD |
625 | char *libname; |
626 | char *soname; | |
9fe6f636 | 627 | struct stat stat_buf; |
b85697f6 | 628 | int flag; |
efbbd9c3 | 629 | unsigned int isa_level; |
b85697f6 UD |
630 | |
631 | /* Prepare arguments for create_links call. Split library name in | |
632 | directory and filename first. Since path is allocated, we've got | |
633 | to be careful to free at the end. */ | |
634 | path = xstrdup (library); | |
635 | libname = strrchr (path, '/'); | |
636 | ||
637 | if (libname) | |
638 | { | |
639 | /* Successfully split names. Check if path is just "/" to avoid | |
27d9ffda | 640 | an empty path. */ |
b85697f6 UD |
641 | if (libname == path) |
642 | { | |
643 | libname = library + 1; | |
644 | path = xrealloc (path, 2); | |
645 | strcpy (path, "/"); | |
646 | } | |
647 | else | |
648 | { | |
649 | *libname = '\0'; | |
650 | ++libname; | |
651 | } | |
652 | } | |
653 | else | |
654 | { | |
655 | /* There's no path, construct one. */ | |
656 | libname = library; | |
657 | path = xrealloc (path, 2); | |
658 | strcpy (path, "."); | |
659 | } | |
660 | ||
22866ed8 | 661 | if (opt_chroot != NULL) |
b4a555d6 UD |
662 | { |
663 | real_path = chroot_canon (opt_chroot, path); | |
664 | if (real_path == NULL) | |
665 | { | |
666 | error (0, errno, _("Can't find %s"), path); | |
667 | free (path); | |
668 | return; | |
669 | } | |
670 | real_library = alloca (strlen (real_path) + strlen (libname) + 2); | |
671 | sprintf (real_library, "%s/%s", real_path, libname); | |
672 | } | |
673 | else | |
674 | { | |
675 | real_path = path; | |
676 | real_library = library; | |
677 | } | |
678 | ||
b85697f6 | 679 | /* Do some sanity checks first. */ |
9fe6f636 | 680 | if (lstat (real_library, &stat_buf)) |
b85697f6 | 681 | { |
11bf311e | 682 | error (0, errno, _("Cannot lstat %s"), library); |
468d772e | 683 | goto out; |
b85697f6 UD |
684 | } |
685 | /* We don't want links here! */ | |
686 | else if (!S_ISREG (stat_buf.st_mode)) | |
687 | { | |
688 | error (0, 0, _("Ignored file %s since it is not a regular file."), | |
689 | library); | |
468d772e | 690 | goto out; |
b85697f6 | 691 | } |
27d9ffda | 692 | |
c628c229 AZ |
693 | if (process_file (real_library, library, libname, &flag, &isa_level, &soname, |
694 | 0, &stat_buf)) | |
b85697f6 UD |
695 | { |
696 | error (0, 0, _("No link created since soname could not be found for %s"), | |
697 | library); | |
468d772e | 698 | goto out; |
b85697f6 | 699 | } |
27d9ffda UD |
700 | if (soname == NULL) |
701 | soname = implicit_soname (libname, flag); | |
b4a555d6 | 702 | create_links (real_path, path, libname, soname); |
b85697f6 | 703 | free (soname); |
468d772e | 704 | out: |
468d772e SP |
705 | if (path != real_path) |
706 | free (real_path); | |
03ad8688 | 707 | free (path); |
b85697f6 UD |
708 | } |
709 | ||
710 | ||
591e1ffb UD |
711 | /* Read a whole directory and search for libraries. |
712 | The purpose is two-fold: | |
713 | - search for libraries which will be added to the cache | |
714 | - create symbolic links to the soname for each library | |
715 | ||
716 | This has to be done separatly for each directory. | |
45eca4d1 | 717 | |
591e1ffb UD |
718 | To keep track of which libraries to add to the cache and which |
719 | links to create, we save a list of all libraries. | |
720 | ||
721 | The algorithm is basically: | |
722 | for all libraries in the directory do | |
723 | get soname of library | |
724 | if soname is already in list | |
725 | if new library is newer, replace entry | |
726 | otherwise ignore this library | |
727 | otherwise add library to list | |
45eca4d1 | 728 | |
591e1ffb UD |
729 | For example, if the two libraries libxy.so.1.1 and libxy.so.1.2 |
730 | exist and both have the same soname, e.g. libxy.so, a symbolic link | |
731 | is created from libxy.so.1.2 (the newer one) to libxy.so. | |
732 | libxy.so.1.2 and libxy.so are added to the cache - but not | |
733 | libxy.so.1.1. */ | |
734 | ||
735 | /* Information for one library. */ | |
45eca4d1 | 736 | struct dlib_entry |
591e1ffb UD |
737 | { |
738 | char *name; | |
739 | char *soname; | |
740 | int flag; | |
741 | int is_link; | |
efbbd9c3 | 742 | unsigned int isa_level; |
591e1ffb UD |
743 | struct dlib_entry *next; |
744 | }; | |
745 | ||
746 | ||
747 | static void | |
748 | search_dir (const struct dir_entry *entry) | |
749 | { | |
b44ac4f4 FW |
750 | uint64_t hwcap; |
751 | if (entry->hwcaps == NULL) | |
45eca4d1 | 752 | { |
b44ac4f4 FW |
753 | hwcap = path_hwcap (entry->path); |
754 | if (opt_verbose) | |
755 | { | |
756 | if (hwcap != 0) | |
757 | printf ("%s: (hwcap: %#.16" PRIx64 ")", entry->path, hwcap); | |
758 | else | |
759 | printf ("%s:", entry->path); | |
760 | } | |
45eca4d1 | 761 | } |
b44ac4f4 FW |
762 | else |
763 | { | |
764 | hwcap = 0; | |
765 | if (opt_verbose) | |
766 | printf ("%s: (hwcap: \"%s\")", entry->path, | |
767 | glibc_hwcaps_subdirectory_name (entry->hwcaps)); | |
768 | } | |
769 | if (opt_verbose) | |
770 | printf (_(" (from %s:%d)\n"), entry->from_file, entry->from_line); | |
45eca4d1 | 771 | |
27d9ffda UD |
772 | char *dir_name; |
773 | char *real_file_name; | |
774 | size_t real_file_name_len; | |
775 | size_t file_name_len = PATH_MAX; | |
776 | char *file_name = alloca (file_name_len); | |
22866ed8 | 777 | if (opt_chroot != NULL) |
b4a555d6 UD |
778 | { |
779 | dir_name = chroot_canon (opt_chroot, entry->path); | |
780 | real_file_name_len = PATH_MAX; | |
781 | real_file_name = alloca (real_file_name_len); | |
782 | } | |
783 | else | |
784 | { | |
785 | dir_name = entry->path; | |
786 | real_file_name_len = 0; | |
787 | real_file_name = file_name; | |
788 | } | |
789 | ||
27d9ffda | 790 | DIR *dir; |
b4a555d6 | 791 | if (dir_name == NULL || (dir = opendir (dir_name)) == NULL) |
591e1ffb UD |
792 | { |
793 | if (opt_verbose) | |
794 | error (0, errno, _("Can't open directory %s"), entry->path); | |
22866ed8 | 795 | if (opt_chroot != NULL && dir_name != NULL) |
b4a555d6 | 796 | free (dir_name); |
591e1ffb UD |
797 | return; |
798 | } | |
45eca4d1 | 799 | |
27d9ffda UD |
800 | struct dirent64 *direntry; |
801 | struct dlib_entry *dlibs = NULL; | |
2b510e91 | 802 | while ((direntry = readdir64 (dir)) != NULL) |
591e1ffb UD |
803 | { |
804 | int flag; | |
591e1ffb UD |
805 | /* We only look at links and regular files. */ |
806 | if (direntry->d_type != DT_UNKNOWN | |
807 | && direntry->d_type != DT_LNK | |
45eca4d1 UD |
808 | && direntry->d_type != DT_REG |
809 | && direntry->d_type != DT_DIR) | |
591e1ffb | 810 | continue; |
45eca4d1 | 811 | /* Does this file look like a shared library or is it a hwcap |
b44ac4f4 FW |
812 | subdirectory (if not already processing a glibc-hwcaps |
813 | subdirectory)? The dynamic linker is also considered as | |
45eca4d1 | 814 | shared library. */ |
6bf789d6 | 815 | if (!_dl_is_dso (direntry->d_name) |
4484b9e2 | 816 | && (direntry->d_type == DT_REG |
b44ac4f4 FW |
817 | || (entry->hwcaps == NULL |
818 | && !is_hwcap_platform (direntry->d_name)))) | |
591e1ffb | 819 | continue; |
27d9ffda UD |
820 | |
821 | size_t len = strlen (direntry->d_name); | |
3858bf28 RM |
822 | /* Skip temporary files created by the prelink program. Files with |
823 | names like these are never really DSOs we want to look at. */ | |
824 | if (len >= sizeof (".#prelink#") - 1) | |
825 | { | |
826 | if (strcmp (direntry->d_name + len - sizeof (".#prelink#") + 1, | |
827 | ".#prelink#") == 0) | |
828 | continue; | |
829 | if (len >= sizeof (".#prelink#.XXXXXX") - 1 | |
830 | && memcmp (direntry->d_name + len - sizeof (".#prelink#.XXXXXX") | |
831 | + 1, ".#prelink#.", sizeof (".#prelink#.") - 1) == 0) | |
832 | continue; | |
833 | } | |
30a3aa75 | 834 | len += strlen (entry->path) + 2; |
7b0d235c | 835 | if (len > file_name_len) |
591e1ffb | 836 | { |
30a3aa75 | 837 | file_name_len = len; |
7b0d235c | 838 | file_name = alloca (file_name_len); |
b4a555d6 UD |
839 | if (!opt_chroot) |
840 | real_file_name = file_name; | |
841 | } | |
842 | sprintf (file_name, "%s/%s", entry->path, direntry->d_name); | |
22866ed8 | 843 | if (opt_chroot != NULL) |
b4a555d6 | 844 | { |
30a3aa75 | 845 | len = strlen (dir_name) + strlen (direntry->d_name) + 2; |
b4a555d6 UD |
846 | if (len > real_file_name_len) |
847 | { | |
30a3aa75 | 848 | real_file_name_len = len; |
b4a555d6 UD |
849 | real_file_name = alloca (real_file_name_len); |
850 | } | |
851 | sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name); | |
591e1ffb | 852 | } |
27d9ffda | 853 | |
9fe6f636 | 854 | struct stat lstat_buf; |
27d9ffda | 855 | /* We optimize and try to do the lstat call only if needed. */ |
7c3002f0 | 856 | if (direntry->d_type != DT_UNKNOWN) |
4ceae915 | 857 | lstat_buf.st_mode = DTTOIF (direntry->d_type); |
7c3002f0 | 858 | else |
9fe6f636 | 859 | if (__glibc_unlikely (lstat (real_file_name, &lstat_buf))) |
7c3002f0 | 860 | { |
95ce33a5 | 861 | error (0, errno, _("Cannot lstat %s"), file_name); |
7c3002f0 UD |
862 | continue; |
863 | } | |
864 | ||
9fe6f636 | 865 | struct stat stat_buf; |
b44ac4f4 | 866 | bool is_dir; |
27d9ffda | 867 | int is_link = S_ISLNK (lstat_buf.st_mode); |
4ceae915 | 868 | if (is_link) |
27d9ffda | 869 | { |
4ceae915 AJ |
870 | /* In case of symlink, we check if the symlink refers to |
871 | a directory. */ | |
7dee2660 | 872 | char *target_name = real_file_name; |
22866ed8 | 873 | if (opt_chroot != NULL) |
7dee2660 UD |
874 | { |
875 | target_name = chroot_canon (opt_chroot, file_name); | |
876 | if (target_name == NULL) | |
877 | { | |
878 | if (strstr (file_name, ".so") == NULL) | |
879 | error (0, 0, _("Input file %s not found.\n"), file_name); | |
880 | continue; | |
881 | } | |
882 | } | |
9fe6f636 | 883 | if (__glibc_unlikely (stat (target_name, &stat_buf))) |
4ceae915 | 884 | { |
8645ad47 | 885 | if (opt_verbose) |
95ce33a5 | 886 | error (0, errno, _("Cannot stat %s"), file_name); |
647eb037 UD |
887 | |
888 | /* Remove stale symlinks. */ | |
920b35c9 | 889 | if (opt_link && strstr (direntry->d_name, ".so.")) |
647eb037 | 890 | unlink (real_file_name); |
468d772e SP |
891 | |
892 | if (opt_chroot != NULL) | |
893 | free (target_name); | |
894 | ||
4ceae915 AJ |
895 | continue; |
896 | } | |
468d772e SP |
897 | |
898 | if (opt_chroot != NULL) | |
899 | free (target_name); | |
900 | ||
4ceae915 | 901 | is_dir = S_ISDIR (stat_buf.st_mode); |
27d9ffda UD |
902 | |
903 | /* lstat_buf is later stored, update contents. */ | |
904 | lstat_buf.st_dev = stat_buf.st_dev; | |
905 | lstat_buf.st_ino = stat_buf.st_ino; | |
906 | lstat_buf.st_size = stat_buf.st_size; | |
907 | lstat_buf.st_ctime = stat_buf.st_ctime; | |
4ceae915 AJ |
908 | } |
909 | else | |
910 | is_dir = S_ISDIR (lstat_buf.st_mode); | |
911 | ||
b44ac4f4 FW |
912 | /* No descending into subdirectories if this directory is a |
913 | glibc-hwcaps subdirectory (which are not recursive). */ | |
914 | if (entry->hwcaps == NULL | |
915 | && is_dir && is_hwcap_platform (direntry->d_name)) | |
45eca4d1 | 916 | { |
27d9ffda UD |
917 | if (!is_link |
918 | && direntry->d_type != DT_UNKNOWN | |
9fe6f636 | 919 | && __builtin_expect (lstat (real_file_name, &lstat_buf), 0)) |
4ceae915 | 920 | { |
27d9ffda | 921 | error (0, errno, _("Cannot lstat %s"), file_name); |
27d9ffda | 922 | continue; |
4ceae915 | 923 | } |
5e598c2b FW |
924 | |
925 | /* Handle subdirectory later. */ | |
926 | struct dir_entry *new_entry = new_sub_entry (entry, file_name, | |
927 | &lstat_buf); | |
a8fd59b0 | 928 | add_single_dir (new_entry, 0); |
45eca4d1 UD |
929 | continue; |
930 | } | |
0f843f89 | 931 | else if (!S_ISREG (lstat_buf.st_mode) && !is_link) |
591e1ffb UD |
932 | continue; |
933 | ||
27d9ffda | 934 | char *real_name; |
22866ed8 | 935 | if (opt_chroot != NULL && is_link) |
b4a555d6 UD |
936 | { |
937 | real_name = chroot_canon (opt_chroot, file_name); | |
938 | if (real_name == NULL) | |
939 | { | |
940 | if (strstr (file_name, ".so") == NULL) | |
941 | error (0, 0, _("Input file %s not found.\n"), file_name); | |
942 | continue; | |
943 | } | |
944 | } | |
945 | else | |
946 | real_name = real_file_name; | |
591e1ffb | 947 | |
9fe6f636 | 948 | /* Call lstat if not done yet. */ |
27d9ffda UD |
949 | if (!is_link |
950 | && direntry->d_type != DT_UNKNOWN | |
9fe6f636 | 951 | && __builtin_expect (lstat (real_file_name, &lstat_buf), 0)) |
b4a555d6 | 952 | { |
27d9ffda | 953 | error (0, errno, _("Cannot lstat %s"), file_name); |
b4a555d6 UD |
954 | continue; |
955 | } | |
27d9ffda UD |
956 | |
957 | /* First search whether the auxiliary cache contains this | |
958 | library already and it's not changed. */ | |
959 | char *soname; | |
efbbd9c3 | 960 | unsigned int isa_level; |
c628c229 | 961 | if (!search_aux_cache (&lstat_buf, &flag, &isa_level, &soname)) |
27d9ffda UD |
962 | { |
963 | if (process_file (real_name, file_name, direntry->d_name, &flag, | |
c628c229 | 964 | &isa_level, &soname, is_link, &lstat_buf)) |
27d9ffda UD |
965 | { |
966 | if (real_name != real_file_name) | |
967 | free (real_name); | |
968 | continue; | |
969 | } | |
970 | else if (opt_build_cache) | |
c628c229 | 971 | add_to_aux_cache (&lstat_buf, flag, isa_level, soname); |
27d9ffda | 972 | } |
b4a555d6 | 973 | |
27d9ffda UD |
974 | if (soname == NULL) |
975 | soname = implicit_soname (direntry->d_name, flag); | |
82d8607d UD |
976 | |
977 | /* A link may just point to itself. */ | |
591e1ffb UD |
978 | if (is_link) |
979 | { | |
97114a38 CD |
980 | /* If the path the link points to isn't its soname or it is not |
981 | the .so symlink for ld(1), we treat it as a normal file. | |
982 | ||
983 | You should always do this: | |
984 | ||
985 | libfoo.so -> SONAME -> Arbitrary package-chosen name. | |
986 | ||
987 | e.g. libfoo.so -> libfoo.so.1 -> libfooimp.so.9.99. | |
988 | Given a SONAME of libfoo.so.1. | |
989 | ||
990 | You should *never* do this: | |
991 | ||
992 | libfoo.so -> libfooimp.so.9.99 | |
993 | ||
994 | If you do, and your SONAME is libfoo.so.1, then libfoo.so | |
995 | fails to point at the SONAME. In that case ldconfig may consider | |
996 | libfoo.so as another implementation of SONAME and will create | |
997 | symlinks against it causing problems when you try to upgrade | |
998 | or downgrade. The problems will arise because ldconfig will, | |
999 | depending on directory ordering, creat symlinks against libfoo.so | |
1000 | e.g. libfoo.so.1.2 -> libfoo.so, but when libfoo.so is removed | |
1001 | (typically by the removal of a development pacakge not required | |
1002 | for the runtime) it will break the libfoo.so.1.2 symlink and the | |
1003 | application will fail to start. */ | |
2fe98a4a | 1004 | const char *real_base_name = basename (real_file_name); |
82d8607d UD |
1005 | |
1006 | if (strcmp (real_base_name, soname) != 0) | |
1007 | { | |
1008 | len = strlen (real_base_name); | |
1009 | if (len < strlen (".so") | |
1010 | || strcmp (real_base_name + len - strlen (".so"), ".so") != 0 | |
1011 | || strncmp (real_base_name, soname, len) != 0) | |
1012 | is_link = 0; | |
1013 | } | |
27d9ffda | 1014 | } |
45eca4d1 | 1015 | |
395412a0 UD |
1016 | if (real_name != real_file_name) |
1017 | free (real_name); | |
1018 | ||
82d8607d UD |
1019 | if (is_link) |
1020 | { | |
1021 | free (soname); | |
1022 | soname = xstrdup (direntry->d_name); | |
1023 | } | |
1024 | ||
591e1ffb UD |
1025 | /* Some sanity checks to print warnings. */ |
1026 | if (opt_verbose) | |
1027 | { | |
8ee87859 | 1028 | if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6) |
7b0d235c | 1029 | error (0, 0, _("libc6 library %s in wrong directory"), file_name); |
591e1ffb | 1030 | } |
45eca4d1 | 1031 | |
591e1ffb | 1032 | /* Add library to list. */ |
27d9ffda | 1033 | struct dlib_entry *dlib_ptr; |
591e1ffb UD |
1034 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) |
1035 | { | |
1036 | /* Is soname already in list? */ | |
1037 | if (strcmp (dlib_ptr->soname, soname) == 0) | |
1038 | { | |
1039 | /* Prefer a file to a link, otherwise check which one | |
1040 | is newer. */ | |
1041 | if ((!is_link && dlib_ptr->is_link) | |
1042 | || (is_link == dlib_ptr->is_link | |
45eca4d1 | 1043 | && _dl_cache_libcmp (dlib_ptr->name, direntry->d_name) < 0)) |
591e1ffb UD |
1044 | { |
1045 | /* It's newer - add it. */ | |
1046 | /* Flag should be the same - sanity check. */ | |
1047 | if (dlib_ptr->flag != flag) | |
8ee87859 LM |
1048 | error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), |
1049 | dlib_ptr->name, direntry->d_name, entry->path); | |
591e1ffb UD |
1050 | free (dlib_ptr->name); |
1051 | dlib_ptr->name = xstrdup (direntry->d_name); | |
1052 | dlib_ptr->is_link = is_link; | |
efbbd9c3 | 1053 | dlib_ptr->isa_level = isa_level; |
591e1ffb UD |
1054 | } |
1055 | /* Don't add this library, abort loop. */ | |
1056 | /* Also free soname, since it's dynamically allocated. */ | |
1057 | free (soname); | |
1058 | break; | |
1059 | } | |
1060 | } | |
1061 | /* Add the library if it's not already in. */ | |
1062 | if (dlib_ptr == NULL) | |
1063 | { | |
1064 | dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry)); | |
1065 | dlib_ptr->name = xstrdup (direntry->d_name); | |
591e1ffb | 1066 | dlib_ptr->soname = soname; |
27d9ffda | 1067 | dlib_ptr->flag = flag; |
591e1ffb | 1068 | dlib_ptr->is_link = is_link; |
efbbd9c3 | 1069 | dlib_ptr->isa_level = isa_level; |
591e1ffb UD |
1070 | /* Add at head of list. */ |
1071 | dlib_ptr->next = dlibs; | |
1072 | dlibs = dlib_ptr; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | closedir (dir); | |
1077 | ||
1078 | /* Now dlibs contains a list of all libs - add those to the cache | |
1079 | and created all symbolic links. */ | |
27d9ffda | 1080 | struct dlib_entry *dlib_ptr; |
591e1ffb UD |
1081 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) |
1082 | { | |
b44ac4f4 FW |
1083 | /* The cached file name is the soname for non-glibc-hwcaps |
1084 | subdirectories (relying on symbolic links; this helps with | |
1085 | library updates that change the file name), and the actual | |
1086 | file for glibc-hwcaps subdirectories. */ | |
1087 | const char *filename; | |
1088 | if (entry->hwcaps == NULL) | |
1089 | { | |
1090 | /* Don't create links to links. */ | |
1091 | if (dlib_ptr->is_link == 0) | |
1092 | create_links (dir_name, entry->path, dlib_ptr->name, | |
1093 | dlib_ptr->soname); | |
1094 | filename = dlib_ptr->soname; | |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | /* Do not create links in glibc-hwcaps subdirectories, but | |
1099 | still log the cache addition. */ | |
1100 | if (opt_verbose) | |
1101 | printf ("\t%s -> %s\n", dlib_ptr->soname, dlib_ptr->name); | |
1102 | filename = dlib_ptr->name; | |
1103 | } | |
591e1ffb | 1104 | if (opt_build_cache) |
b44ac4f4 | 1105 | add_to_cache (entry->path, filename, dlib_ptr->soname, |
c628c229 AZ |
1106 | dlib_ptr->flag, dlib_ptr->isa_level, hwcap, |
1107 | entry->hwcaps); | |
591e1ffb UD |
1108 | } |
1109 | ||
1110 | /* Free all resources. */ | |
45eca4d1 | 1111 | while (dlibs) |
591e1ffb UD |
1112 | { |
1113 | dlib_ptr = dlibs; | |
1114 | free (dlib_ptr->soname); | |
1115 | free (dlib_ptr->name); | |
1116 | dlibs = dlibs->next; | |
1117 | free (dlib_ptr); | |
1118 | } | |
b4a555d6 | 1119 | |
22866ed8 | 1120 | if (opt_chroot != NULL && dir_name != NULL) |
b4a555d6 | 1121 | free (dir_name); |
591e1ffb UD |
1122 | } |
1123 | ||
1124 | /* Search through all libraries. */ | |
1125 | static void | |
1126 | search_dirs (void) | |
1127 | { | |
1128 | struct dir_entry *entry; | |
1129 | ||
1130 | for (entry = dir_entries; entry != NULL; entry = entry->next) | |
1131 | search_dir (entry); | |
1132 | ||
1133 | /* Free all allocated memory. */ | |
1134 | while (dir_entries) | |
1135 | { | |
1136 | entry = dir_entries; | |
1137 | dir_entries = dir_entries->next; | |
1138 | free (entry->path); | |
1139 | free (entry); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | ||
8e115d80 | 1144 | static void parse_conf_include (const char *config_file, unsigned int lineno, |
a334319f | 1145 | bool do_chroot, const char *pattern); |
8e115d80 | 1146 | |
591e1ffb UD |
1147 | /* Parse configuration file. */ |
1148 | static void | |
a334319f | 1149 | parse_conf (const char *filename, bool do_chroot) |
591e1ffb | 1150 | { |
b4a555d6 | 1151 | FILE *file = NULL; |
591e1ffb | 1152 | char *line = NULL; |
b4a555d6 | 1153 | const char *canon; |
591e1ffb | 1154 | size_t len = 0; |
8e115d80 | 1155 | unsigned int lineno; |
45eca4d1 | 1156 | |
8e115d80 | 1157 | if (do_chroot && opt_chroot) |
b4a555d6 UD |
1158 | { |
1159 | canon = chroot_canon (opt_chroot, filename); | |
1160 | if (canon) | |
1161 | file = fopen (canon, "r"); | |
1162 | else | |
1163 | canon = filename; | |
1164 | } | |
1165 | else | |
1166 | { | |
1167 | canon = filename; | |
1168 | file = fopen (filename, "r"); | |
1169 | } | |
591e1ffb UD |
1170 | |
1171 | if (file == NULL) | |
1172 | { | |
b5a1271c FW |
1173 | if (errno != ENOENT) |
1174 | error (0, errno, _("\ | |
1db86e88 | 1175 | Warning: ignoring configuration file that cannot be opened: %s"), |
b5a1271c | 1176 | canon); |
b4a555d6 UD |
1177 | if (canon != filename) |
1178 | free ((char *) canon); | |
591e1ffb UD |
1179 | return; |
1180 | } | |
1181 | ||
c96873d7 UD |
1182 | /* No threads use this stream. */ |
1183 | __fsetlocking (file, FSETLOCKING_BYCALLER); | |
1184 | ||
b4a555d6 UD |
1185 | if (canon != filename) |
1186 | free ((char *) canon); | |
1187 | ||
8e115d80 | 1188 | lineno = 0; |
591e1ffb UD |
1189 | do |
1190 | { | |
1191 | ssize_t n = getline (&line, &len, file); | |
1192 | if (n < 0) | |
1193 | break; | |
1194 | ||
8e115d80 | 1195 | ++lineno; |
591e1ffb UD |
1196 | if (line[n - 1] == '\n') |
1197 | line[n - 1] = '\0'; | |
1198 | ||
1199 | /* Because the file format does not know any form of quoting we | |
1200 | can search forward for the next '#' character and if found | |
1201 | make it terminating the line. */ | |
1202 | *strchrnul (line, '#') = '\0'; | |
1203 | ||
69acbe9f UD |
1204 | /* Remove leading whitespace. NUL is no whitespace character. */ |
1205 | char *cp = line; | |
1206 | while (isspace (*cp)) | |
1207 | ++cp; | |
1208 | ||
591e1ffb | 1209 | /* If the line is blank it is ignored. */ |
69acbe9f | 1210 | if (cp[0] == '\0') |
591e1ffb UD |
1211 | continue; |
1212 | ||
8e115d80 RM |
1213 | if (!strncmp (cp, "include", 7) && isblank (cp[7])) |
1214 | { | |
1215 | char *dir; | |
1216 | cp += 8; | |
1217 | while ((dir = strsep (&cp, " \t")) != NULL) | |
1218 | if (dir[0] != '\0') | |
a334319f | 1219 | parse_conf_include (filename, lineno, do_chroot, dir); |
8e115d80 | 1220 | } |
ab1d521d | 1221 | else if (!strncasecmp (cp, "hwcap", 5) && isblank (cp[5])) |
31563b68 | 1222 | error (0, 0, _("%s:%u: hwcap directive ignored"), filename, lineno); |
8e115d80 | 1223 | else |
b7176cc2 | 1224 | add_dir_1 (cp, filename, lineno); |
69acbe9f UD |
1225 | } |
1226 | while (!feof_unlocked (file)); | |
591e1ffb UD |
1227 | |
1228 | /* Free buffer and close file. */ | |
1229 | free (line); | |
1230 | fclose (file); | |
1231 | } | |
1232 | ||
8e115d80 RM |
1233 | /* Handle one word in an `include' line, a glob pattern of additional |
1234 | config files to read. */ | |
1235 | static void | |
1236 | parse_conf_include (const char *config_file, unsigned int lineno, | |
a334319f | 1237 | bool do_chroot, const char *pattern) |
8e115d80 | 1238 | { |
22866ed8 | 1239 | if (opt_chroot != NULL && pattern[0] != '/') |
8e115d80 RM |
1240 | error (EXIT_FAILURE, 0, |
1241 | _("need absolute file name for configuration file when using -r")); | |
1242 | ||
1243 | char *copy = NULL; | |
1244 | if (pattern[0] != '/' && strchr (config_file, '/') != NULL) | |
1245 | { | |
322861e8 UD |
1246 | if (asprintf (©, "%s/%s", dirname (strdupa (config_file)), |
1247 | pattern) < 0) | |
1248 | error (EXIT_FAILURE, 0, _("memory exhausted")); | |
8e115d80 RM |
1249 | pattern = copy; |
1250 | } | |
1251 | ||
1252 | glob64_t gl; | |
1253 | int result; | |
1254 | if (do_chroot && opt_chroot) | |
1255 | { | |
1256 | char *canon = chroot_canon (opt_chroot, pattern); | |
49bd556d UD |
1257 | if (canon == NULL) |
1258 | return; | |
1259 | result = glob64 (canon, 0, NULL, &gl); | |
8e115d80 RM |
1260 | free (canon); |
1261 | } | |
1262 | else | |
1263 | result = glob64 (pattern, 0, NULL, &gl); | |
1264 | ||
1265 | switch (result) | |
1266 | { | |
1267 | case 0: | |
1268 | for (size_t i = 0; i < gl.gl_pathc; ++i) | |
a334319f | 1269 | parse_conf (gl.gl_pathv[i], false); |
8e115d80 RM |
1270 | globfree64 (&gl); |
1271 | break; | |
1272 | ||
1273 | case GLOB_NOMATCH: | |
1274 | break; | |
1275 | ||
1276 | case GLOB_NOSPACE: | |
1277 | errno = ENOMEM; | |
32db86d5 | 1278 | /* Fall through. */ |
8e115d80 RM |
1279 | case GLOB_ABORTED: |
1280 | if (opt_verbose) | |
1281 | error (0, errno, _("%s:%u: cannot read directory %s"), | |
1282 | config_file, lineno, pattern); | |
1283 | break; | |
1284 | ||
1285 | default: | |
1286 | abort (); | |
1287 | break; | |
1288 | } | |
1289 | ||
72e6cdfa | 1290 | free (copy); |
8e115d80 RM |
1291 | } |
1292 | ||
0cfbb8c6 UD |
1293 | /* Honour LD_HWCAP_MASK. */ |
1294 | static void | |
1295 | set_hwcap (void) | |
1296 | { | |
1297 | char *mask = getenv ("LD_HWCAP_MASK"); | |
1298 | ||
1299 | if (mask) | |
1300 | hwcap_mask = strtoul (mask, NULL, 0); | |
1301 | } | |
1302 | ||
591e1ffb UD |
1303 | |
1304 | int | |
1305 | main (int argc, char **argv) | |
1306 | { | |
11bf311e UD |
1307 | /* Set locale via LC_ALL. */ |
1308 | setlocale (LC_ALL, ""); | |
1309 | ||
7d38eb38 AJ |
1310 | /* But keep the C collation. That way `include' directives using |
1311 | globbing patterns are processed in a locale-independent order. */ | |
1312 | setlocale (LC_COLLATE, "C"); | |
1313 | ||
11bf311e UD |
1314 | /* Set the text message domain. */ |
1315 | textdomain (_libc_intl_domainname); | |
45eca4d1 | 1316 | |
591e1ffb | 1317 | /* Parse and process arguments. */ |
11bf311e | 1318 | int remaining; |
591e1ffb UD |
1319 | argp_parse (&argp, argc, argv, 0, &remaining, NULL); |
1320 | ||
11bf8ce1 | 1321 | /* Remaining arguments are additional directories if opt_manual_link |
b85697f6 UD |
1322 | is not set. */ |
1323 | if (remaining != argc && !opt_manual_link) | |
591e1ffb UD |
1324 | { |
1325 | int i; | |
1326 | for (i = remaining; i < argc; ++i) | |
11bf8ce1 UD |
1327 | if (opt_build_cache && argv[i][0] != '/') |
1328 | error (EXIT_FAILURE, 0, | |
1329 | _("relative path `%s' used to build cache"), | |
1330 | argv[i]); | |
1331 | else | |
b7176cc2 | 1332 | add_dir_1 (argv[i], "<cmdline>", 0); |
591e1ffb UD |
1333 | } |
1334 | ||
0cfbb8c6 UD |
1335 | set_hwcap (); |
1336 | ||
22866ed8 | 1337 | if (opt_chroot != NULL) |
591e1ffb | 1338 | { |
f0189a54 | 1339 | /* Normalize the path a bit, we might need it for printing later. */ |
616d9133 | 1340 | char *endp = rawmemchr (opt_chroot, '\0'); |
b4a555d6 | 1341 | while (endp > opt_chroot && endp[-1] == '/') |
f0189a54 UD |
1342 | --endp; |
1343 | *endp = '\0'; | |
b4a555d6 UD |
1344 | if (endp == opt_chroot) |
1345 | opt_chroot = NULL; | |
f0189a54 | 1346 | |
22866ed8 | 1347 | if (opt_chroot != NULL) |
b4a555d6 UD |
1348 | { |
1349 | /* It is faster to use chroot if we can. */ | |
1350 | if (!chroot (opt_chroot)) | |
1351 | { | |
1352 | if (chdir ("/")) | |
1353 | error (EXIT_FAILURE, errno, _("Can't chdir to /")); | |
1354 | opt_chroot = NULL; | |
1355 | } | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | if (cache_file == NULL) | |
1360 | { | |
1361 | cache_file = alloca (strlen (LD_SO_CACHE) + 1); | |
1362 | strcpy (cache_file, LD_SO_CACHE); | |
591e1ffb UD |
1363 | } |
1364 | ||
b4a555d6 UD |
1365 | if (config_file == NULL) |
1366 | config_file = LD_SO_CONF; | |
1367 | ||
591e1ffb UD |
1368 | if (opt_print_cache) |
1369 | { | |
22866ed8 | 1370 | if (opt_chroot != NULL) |
b4a555d6 UD |
1371 | { |
1372 | char *p = chroot_canon (opt_chroot, cache_file); | |
1373 | if (p == NULL) | |
1374 | error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"), | |
1375 | cache_file); | |
1376 | cache_file = p; | |
1377 | } | |
591e1ffb | 1378 | print_cache (cache_file); |
22866ed8 | 1379 | if (opt_chroot != NULL) |
b4a555d6 | 1380 | free (cache_file); |
591e1ffb UD |
1381 | exit (0); |
1382 | } | |
1383 | ||
22866ed8 | 1384 | if (opt_chroot != NULL) |
b4a555d6 UD |
1385 | { |
1386 | /* Canonicalize the directory name of cache_file, not cache_file, | |
27d9ffda | 1387 | because we'll rename a temporary cache file to it. */ |
b4a555d6 UD |
1388 | char *p = strrchr (cache_file, '/'); |
1389 | char *canon = chroot_canon (opt_chroot, | |
1390 | p ? (*p = '\0', cache_file) : "/"); | |
1391 | ||
1392 | if (canon == NULL) | |
4bc2bcba UD |
1393 | error (EXIT_FAILURE, errno, |
1394 | _("Can't open cache file directory %s\n"), | |
1395 | p ? cache_file : "/"); | |
b4a555d6 UD |
1396 | |
1397 | if (p) | |
1398 | ++p; | |
1399 | else | |
1400 | p = cache_file; | |
1401 | ||
1402 | cache_file = alloca (strlen (canon) + strlen (p) + 2); | |
1403 | sprintf (cache_file, "%s/%s", canon, p); | |
1404 | free (canon); | |
1405 | } | |
1406 | ||
b85697f6 UD |
1407 | if (opt_manual_link) |
1408 | { | |
1409 | /* Link all given libraries manually. */ | |
1410 | int i; | |
1411 | ||
1412 | for (i = remaining; i < argc; ++i) | |
a986484f | 1413 | manual_link (argv[i]); |
b85697f6 UD |
1414 | |
1415 | exit (0); | |
1416 | } | |
45eca4d1 UD |
1417 | |
1418 | ||
591e1ffb UD |
1419 | if (opt_build_cache) |
1420 | init_cache (); | |
1421 | ||
1422 | if (!opt_only_cline) | |
1423 | { | |
a334319f | 1424 | parse_conf (config_file, true); |
334fcf2a | 1425 | |
591e1ffb | 1426 | /* Always add the standard search paths. */ |
bd89c0b5 | 1427 | add_system_dir (SLIBDIR); |
8ca91b36 | 1428 | if (strcmp (SLIBDIR, LIBDIR)) |
bd89c0b5 | 1429 | add_system_dir (LIBDIR); |
591e1ffb | 1430 | } |
45eca4d1 | 1431 | |
3f7dcb2b | 1432 | const char *aux_cache_file = _PATH_LDCONFIG_AUX_CACHE; |
22866ed8 | 1433 | if (opt_chroot != NULL) |
6db52fbb | 1434 | aux_cache_file = chroot_canon (opt_chroot, aux_cache_file); |
4bc2bcba | 1435 | |
6db52fbb | 1436 | if (! opt_ignore_aux_cache && aux_cache_file) |
4bc2bcba | 1437 | load_aux_cache (aux_cache_file); |
27d9ffda UD |
1438 | else |
1439 | init_aux_cache (); | |
1440 | ||
591e1ffb UD |
1441 | search_dirs (); |
1442 | ||
1443 | if (opt_build_cache) | |
27d9ffda UD |
1444 | { |
1445 | save_cache (cache_file); | |
6db52fbb | 1446 | if (aux_cache_file) |
c0dafcf1 | 1447 | save_aux_cache (aux_cache_file); |
27d9ffda | 1448 | } |
591e1ffb UD |
1449 | |
1450 | return 0; | |
1451 | } |