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b0c9067d | 1 | /* Copyright (C) 1999, 2000, 2001, 2002, 2003 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 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
591e1ffb UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
591e1ffb | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
591e1ffb | 19 | |
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 UD |
27 | #include <libintl.h> |
28 | #include <stdio.h> | |
c96873d7 | 29 | #include <stdio_ext.h> |
591e1ffb UD |
30 | #include <stdlib.h> |
31 | #include <string.h> | |
32 | #include <unistd.h> | |
33 | #include <sys/fcntl.h> | |
34 | #include <sys/mman.h> | |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
37 | ||
38 | #include "ldconfig.h" | |
45eca4d1 | 39 | #include "dl-cache.h" |
591e1ffb | 40 | |
45eca4d1 | 41 | #include "dl-procinfo.h" |
591e1ffb UD |
42 | |
43 | #ifndef LD_SO_CONF | |
8ca91b36 | 44 | # define LD_SO_CONF SYSCONFDIR "/ld.so.conf" |
591e1ffb UD |
45 | #endif |
46 | ||
47 | /* Get libc version number. */ | |
48 | #include <version.h> | |
49 | ||
50 | #define PACKAGE _libc_intl_domainname | |
51 | ||
591e1ffb UD |
52 | static const struct |
53 | { | |
54 | const char *name; | |
55 | int flag; | |
a986484f | 56 | } lib_types[] = |
591e1ffb UD |
57 | { |
58 | {"libc4", FLAG_LIBC4}, | |
59 | {"libc5", FLAG_ELF_LIBC5}, | |
60 | {"libc6", FLAG_ELF_LIBC6}, | |
61 | {"glibc2", FLAG_ELF_LIBC6} | |
45eca4d1 | 62 | }; |
591e1ffb UD |
63 | |
64 | ||
65 | /* List of directories to handle. */ | |
66 | struct dir_entry | |
67 | { | |
68 | char *path; | |
69 | int flag; | |
4ceae915 AJ |
70 | ino64_t ino; |
71 | dev_t dev; | |
591e1ffb UD |
72 | struct dir_entry *next; |
73 | }; | |
74 | ||
75 | /* The list is unsorted, contains no duplicates. Entries are added at | |
76 | the end. */ | |
77 | static struct dir_entry *dir_entries; | |
78 | ||
79 | /* Flags for different options. */ | |
80 | /* Print Cache. */ | |
c96873d7 | 81 | static int opt_print_cache; |
591e1ffb UD |
82 | |
83 | /* Be verbose. */ | |
c96873d7 | 84 | int opt_verbose; |
591e1ffb | 85 | |
45eca4d1 UD |
86 | /* Format to support. */ |
87 | /* 0: only libc5/glibc2; 1: both; 2: only glibc 2.2. */ | |
88 | int opt_format = 1; | |
89 | ||
591e1ffb UD |
90 | /* Build cache. */ |
91 | static int opt_build_cache = 1; | |
92 | ||
93 | /* Generate links. */ | |
94 | static int opt_link = 1; | |
95 | ||
96 | /* Only process directories specified on the command line. */ | |
c96873d7 | 97 | static int opt_only_cline; |
591e1ffb UD |
98 | |
99 | /* Path to root for chroot. */ | |
100 | static char *opt_chroot; | |
101 | ||
b85697f6 | 102 | /* Manually link given shared libraries. */ |
c96873d7 | 103 | static int opt_manual_link; |
b85697f6 | 104 | |
591e1ffb | 105 | /* Cache file to use. */ |
b4a555d6 | 106 | static char *cache_file; |
591e1ffb UD |
107 | |
108 | /* Configuration file. */ | |
109 | static const char *config_file; | |
110 | ||
0cfbb8c6 UD |
111 | /* Mask to use for important hardware capabilities. */ |
112 | static unsigned long int hwcap_mask = HWCAP_IMPORTANT; | |
113 | ||
591e1ffb UD |
114 | /* Name and version of program. */ |
115 | static void print_version (FILE *stream, struct argp_state *state); | |
116 | void (*argp_program_version_hook) (FILE *, struct argp_state *) | |
117 | = print_version; | |
118 | ||
119 | /* Definitions of arguments for argp functions. */ | |
120 | static const struct argp_option options[] = | |
121 | { | |
122 | { "print-cache", 'p', NULL, 0, N_("Print cache"), 0}, | |
123 | { "verbose", 'v', NULL, 0, N_("Generate verbose messages"), 0}, | |
124 | { NULL, 'N', NULL, 0, N_("Don't build cache"), 0}, | |
125 | { NULL, 'X', NULL, 0, N_("Don't generate links"), 0}, | |
126 | { NULL, 'r', "ROOT", 0, N_("Change to and use ROOT as root directory"), 0}, | |
127 | { NULL, 'C', "CACHE", 0, N_("Use CACHE as cache file"), 0}, | |
128 | { NULL, 'f', "CONF", 0, N_("Use CONF as configuration file"), 0}, | |
129 | { NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0}, | |
b85697f6 | 130 | { NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0}, |
45eca4d1 | 131 | { "format", 'c', "FORMAT", 0, N_("Format to use: new, old or compat (default)"), 0}, |
591e1ffb UD |
132 | { NULL, 0, NULL, 0, NULL, 0 } |
133 | }; | |
134 | ||
135 | /* Short description of program. */ | |
136 | static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings."); | |
137 | ||
138 | /* Prototype for option handler. */ | |
139 | static error_t parse_opt (int key, char *arg, struct argp_state *state); | |
140 | ||
141 | /* Data structure to communicate with argp functions. */ | |
142 | static struct argp argp = | |
143 | { | |
144 | options, parse_opt, NULL, doc, NULL, NULL, NULL | |
145 | }; | |
146 | ||
a6c1c03a AJ |
147 | /* Check if string corresponds to an important hardware capability or |
148 | a platform. */ | |
45eca4d1 | 149 | static int |
a6c1c03a | 150 | is_hwcap_platform (const char *name) |
45eca4d1 UD |
151 | { |
152 | int hwcap_idx = _dl_string_hwcap (name); | |
8ca91b36 | 153 | |
0cfbb8c6 | 154 | if (hwcap_idx != -1 && ((1 << hwcap_idx) & hwcap_mask)) |
45eca4d1 | 155 | return 1; |
a6c1c03a AJ |
156 | |
157 | hwcap_idx = _dl_string_platform (name); | |
158 | if (hwcap_idx != -1) | |
159 | return 1; | |
160 | ||
676fde70 UD |
161 | #ifdef USE_TLS |
162 | if (strcmp (name, "tls") == 0) | |
163 | return 1; | |
164 | #endif | |
165 | ||
45eca4d1 UD |
166 | return 0; |
167 | } | |
168 | ||
a6c1c03a AJ |
169 | /* Get hwcap (including platform) encoding of path. */ |
170 | static uint64_t | |
45eca4d1 UD |
171 | path_hwcap (const char *path) |
172 | { | |
173 | char *str = xstrdup (path); | |
174 | char *ptr; | |
a6c1c03a AJ |
175 | uint64_t hwcap = 0; |
176 | uint64_t h; | |
45eca4d1 UD |
177 | |
178 | size_t len; | |
179 | ||
180 | len = strlen (str); | |
181 | if (str[len] == '/') | |
182 | str[len] = '\0'; | |
183 | ||
184 | /* Search pathname from the end and check for hwcap strings. */ | |
185 | for (;;) | |
186 | { | |
187 | ptr = strrchr (str, '/'); | |
188 | ||
189 | if (ptr == NULL) | |
190 | break; | |
191 | ||
a6c1c03a | 192 | h = _dl_string_hwcap (ptr + 1); |
45eca4d1 | 193 | |
59553897 UD |
194 | if (h == (uint64_t) -1) |
195 | { | |
196 | h = _dl_string_platform (ptr + 1); | |
197 | if (h == (uint64_t) -1) | |
676fde70 UD |
198 | { |
199 | #ifdef USE_TLS | |
200 | if (strcmp (ptr + 1, "tls") == 0) | |
201 | h = 63; | |
202 | else | |
203 | #endif | |
204 | break; | |
205 | } | |
59553897 | 206 | } |
a6c1c03a | 207 | hwcap += 1ULL << h; |
591e1ffb | 208 | |
45eca4d1 UD |
209 | /* Search the next part of the path. */ |
210 | *ptr = '\0'; | |
211 | } | |
212 | ||
213 | free (str); | |
214 | return hwcap; | |
215 | } | |
591e1ffb UD |
216 | |
217 | /* Handle program arguments. */ | |
218 | static error_t | |
219 | parse_opt (int key, char *arg, struct argp_state *state) | |
220 | { | |
221 | switch (key) | |
222 | { | |
223 | case 'C': | |
224 | cache_file = arg; | |
225 | break; | |
226 | case 'f': | |
227 | config_file = arg; | |
228 | break; | |
b85697f6 UD |
229 | case 'l': |
230 | opt_manual_link = 1; | |
231 | break; | |
591e1ffb UD |
232 | case 'N': |
233 | opt_build_cache = 0; | |
234 | break; | |
235 | case 'n': | |
236 | opt_build_cache = 0; | |
237 | opt_only_cline = 1; | |
238 | break; | |
239 | case 'p': | |
240 | opt_print_cache = 1; | |
241 | break; | |
242 | case 'r': | |
243 | opt_chroot = arg; | |
244 | break; | |
245 | case 'v': | |
246 | opt_verbose = 1; | |
247 | break; | |
248 | case 'X': | |
249 | opt_link = 0; | |
250 | break; | |
45eca4d1 UD |
251 | case 'c': |
252 | if (strcmp (arg, "old") == 0) | |
253 | opt_format = 0; | |
254 | else if (strcmp (arg, "compat") == 0) | |
255 | opt_format = 1; | |
256 | else if (strcmp (arg, "new") == 0) | |
257 | opt_format = 2; | |
258 | break; | |
591e1ffb UD |
259 | default: |
260 | return ARGP_ERR_UNKNOWN; | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* Print the version information. */ | |
267 | static void | |
268 | print_version (FILE *stream, struct argp_state *state) | |
269 | { | |
270 | fprintf (stream, "ldconfig (GNU %s) %s\n", PACKAGE, VERSION); | |
271 | fprintf (stream, gettext ("\ | |
272 | Copyright (C) %s Free Software Foundation, Inc.\n\ | |
273 | This is free software; see the source for copying conditions. There is NO\n\ | |
274 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ | |
b0c9067d | 275 | "), "2003"); |
591e1ffb UD |
276 | fprintf (stream, gettext ("Written by %s.\n"), |
277 | "Andreas Jaeger"); | |
278 | } | |
279 | ||
a8fd59b0 AJ |
280 | /* Add a single directory entry. */ |
281 | static void | |
282 | add_single_dir (struct dir_entry *entry, int verbose) | |
283 | { | |
284 | struct dir_entry *ptr, *prev; | |
285 | ||
286 | ptr = dir_entries; | |
287 | prev = ptr; | |
288 | while (ptr != NULL) | |
289 | { | |
290 | /* Check for duplicates. */ | |
4ceae915 | 291 | if (ptr->ino == entry->ino && ptr->dev == entry->dev) |
a8fd59b0 AJ |
292 | { |
293 | if (opt_verbose && verbose) | |
294 | error (0, 0, _("Path `%s' given more than once"), entry->path); | |
295 | /* Use the newer information. */ | |
296 | ptr->flag = entry->flag; | |
4ceae915 | 297 | free (entry->path); |
a8fd59b0 AJ |
298 | free (entry); |
299 | break; | |
300 | } | |
301 | prev = ptr; | |
302 | ptr = ptr->next; | |
303 | } | |
304 | /* Is this the first entry? */ | |
305 | if (ptr == NULL && dir_entries == NULL) | |
306 | dir_entries = entry; | |
307 | else if (ptr == NULL) | |
308 | prev->next = entry; | |
309 | } | |
310 | ||
591e1ffb UD |
311 | /* Add one directory to the list of directories to process. */ |
312 | static void | |
313 | add_dir (const char *line) | |
314 | { | |
315 | char *equal_sign; | |
a8fd59b0 | 316 | struct dir_entry *entry; |
591e1ffb | 317 | unsigned int i; |
4ceae915 | 318 | struct stat64 stat_buf; |
45eca4d1 | 319 | |
591e1ffb UD |
320 | entry = xmalloc (sizeof (struct dir_entry)); |
321 | entry->next = NULL; | |
45eca4d1 | 322 | |
591e1ffb UD |
323 | /* Search for an '=' sign. */ |
324 | entry->path = xstrdup (line); | |
325 | equal_sign = strchr (entry->path, '='); | |
326 | if (equal_sign) | |
327 | { | |
328 | *equal_sign = '\0'; | |
329 | ++equal_sign; | |
330 | entry->flag = FLAG_ANY; | |
a986484f | 331 | for (i = 0; i < sizeof (lib_types) / sizeof (lib_types[0]); ++i) |
591e1ffb UD |
332 | if (strcmp (equal_sign, lib_types[i].name) == 0) |
333 | { | |
334 | entry->flag = lib_types[i].flag; | |
335 | break; | |
336 | } | |
337 | if (entry->flag == FLAG_ANY) | |
338 | error (0, 0, _("%s is not a known library type"), equal_sign); | |
339 | } | |
340 | else | |
341 | { | |
342 | entry->flag = FLAG_ANY; | |
343 | } | |
344 | ||
69acbe9f UD |
345 | /* Canonify path: for now only remove leading and trailing |
346 | whitespace and the trailing slashes slashes. */ | |
591e1ffb | 347 | i = strlen (entry->path) - 1; |
69acbe9f UD |
348 | |
349 | while (isspace (entry->path[i]) && i > 0) | |
350 | entry->path[i--] = '\0'; | |
351 | ||
591e1ffb | 352 | while (entry->path[i] == '/' && i > 0) |
69acbe9f | 353 | entry->path[i--] = '\0'; |
45eca4d1 | 354 | |
4ceae915 AJ |
355 | if (stat64 (entry->path, &stat_buf)) |
356 | { | |
8645ad47 AJ |
357 | if (opt_verbose) |
358 | error (0, errno, _("Can't stat %s"), entry->path); | |
4ceae915 AJ |
359 | free (entry->path); |
360 | free (entry); | |
361 | return; | |
362 | } | |
363 | ||
364 | entry->ino = stat_buf.st_ino; | |
365 | entry->dev = stat_buf.st_dev; | |
366 | ||
367 | add_single_dir (entry, 1); | |
591e1ffb UD |
368 | } |
369 | ||
370 | ||
b4a555d6 UD |
371 | static int |
372 | chroot_stat (const char *real_path, const char *path, struct stat64 *st) | |
373 | { | |
374 | int ret; | |
375 | char *canon_path; | |
376 | ||
377 | if (!opt_chroot) | |
378 | return stat64 (real_path, st); | |
379 | ||
380 | ret = lstat64 (real_path, st); | |
381 | if (ret || !S_ISLNK (st->st_mode)) | |
382 | return ret; | |
383 | ||
384 | canon_path = chroot_canon (opt_chroot, path); | |
385 | if (canon_path == NULL) | |
386 | return -1; | |
387 | ||
388 | ret = stat64 (canon_path, st); | |
389 | free (canon_path); | |
390 | return ret; | |
391 | } | |
392 | ||
591e1ffb UD |
393 | /* Create a symbolic link from soname to libname in directory path. */ |
394 | static void | |
b4a555d6 UD |
395 | create_links (const char *real_path, const char *path, const char *libname, |
396 | const char *soname) | |
591e1ffb | 397 | { |
7b0d235c | 398 | char *full_libname, *full_soname; |
b4a555d6 UD |
399 | char *real_full_libname, *real_full_soname; |
400 | struct stat64 stat_lib, stat_so, lstat_so; | |
591e1ffb UD |
401 | int do_link = 1; |
402 | int do_remove = 1; | |
403 | /* XXX: The logics in this function should be simplified. */ | |
45eca4d1 | 404 | |
591e1ffb | 405 | /* Get complete path. */ |
7b0d235c | 406 | full_libname = alloca (strlen (path) + strlen (libname) + 2); |
7c545dbe | 407 | full_soname = alloca (strlen (path) + strlen (soname) + 2); |
7b0d235c AJ |
408 | sprintf (full_libname, "%s/%s", path, libname); |
409 | sprintf (full_soname, "%s/%s", path, soname); | |
b4a555d6 UD |
410 | if (opt_chroot) |
411 | { | |
412 | real_full_libname = alloca (strlen (real_path) + strlen (libname) + 2); | |
7c545dbe | 413 | real_full_soname = alloca (strlen (real_path) + strlen (soname) + 2); |
b4a555d6 UD |
414 | sprintf (real_full_libname, "%s/%s", real_path, libname); |
415 | sprintf (real_full_soname, "%s/%s", real_path, soname); | |
416 | } | |
417 | else | |
418 | { | |
419 | real_full_libname = full_libname; | |
420 | real_full_soname = full_soname; | |
421 | } | |
591e1ffb UD |
422 | |
423 | /* Does soname already exist and point to the right library? */ | |
b4a555d6 | 424 | if (chroot_stat (real_full_soname, full_soname, &stat_so) == 0) |
591e1ffb | 425 | { |
b4a555d6 | 426 | if (chroot_stat (real_full_libname, full_libname, &stat_lib)) |
591e1ffb UD |
427 | { |
428 | error (0, 0, _("Can't stat %s\n"), full_libname); | |
429 | return; | |
430 | } | |
431 | if (stat_lib.st_dev == stat_so.st_dev | |
432 | && stat_lib.st_ino == stat_so.st_ino) | |
433 | /* Link is already correct. */ | |
434 | do_link = 0; | |
b4a555d6 | 435 | else if (lstat64 (full_soname, &lstat_so) == 0 |
591e1ffb UD |
436 | && !S_ISLNK (lstat_so.st_mode)) |
437 | { | |
438 | error (0, 0, _("%s is not a symbolic link\n"), full_soname); | |
439 | do_link = 0; | |
440 | do_remove = 0; | |
441 | } | |
442 | } | |
b4a555d6 | 443 | else if (lstat64 (real_full_soname, &lstat_so) != 0 |
591e1ffb UD |
444 | || !S_ISLNK (lstat_so.st_mode)) |
445 | /* Unless it is a stale symlink, there is no need to remove. */ | |
446 | do_remove = 0; | |
447 | ||
448 | if (opt_verbose) | |
449 | printf ("\t%s -> %s", soname, libname); | |
450 | ||
451 | if (do_link && opt_link) | |
452 | { | |
453 | /* Remove old link. */ | |
454 | if (do_remove) | |
b4a555d6 | 455 | if (unlink (real_full_soname)) |
591e1ffb UD |
456 | { |
457 | error (0, 0, _("Can't unlink %s"), full_soname); | |
458 | do_link = 0; | |
459 | } | |
460 | /* Create symbolic link. */ | |
b4a555d6 | 461 | if (do_link && symlink (libname, real_full_soname)) |
591e1ffb UD |
462 | { |
463 | error (0, 0, _("Can't link %s to %s"), full_soname, libname); | |
464 | do_link = 0; | |
465 | } | |
466 | if (opt_verbose) | |
467 | { | |
468 | if (do_link) | |
469 | fputs (_(" (changed)\n"), stdout); | |
470 | else | |
471 | fputs (_(" (SKIPPED)\n"), stdout); | |
472 | } | |
473 | } | |
474 | else if (opt_verbose) | |
475 | fputs ("\n", stdout); | |
476 | } | |
477 | ||
b85697f6 UD |
478 | /* Manually link the given library. */ |
479 | static void | |
480 | manual_link (char *library) | |
481 | { | |
482 | char *path; | |
b4a555d6 UD |
483 | char *real_path; |
484 | char *real_library; | |
b85697f6 UD |
485 | char *libname; |
486 | char *soname; | |
b4a555d6 | 487 | struct stat64 stat_buf; |
b85697f6 | 488 | int flag; |
a986484f | 489 | unsigned int osversion; |
b85697f6 UD |
490 | |
491 | /* Prepare arguments for create_links call. Split library name in | |
492 | directory and filename first. Since path is allocated, we've got | |
493 | to be careful to free at the end. */ | |
494 | path = xstrdup (library); | |
495 | libname = strrchr (path, '/'); | |
496 | ||
497 | if (libname) | |
498 | { | |
499 | /* Successfully split names. Check if path is just "/" to avoid | |
500 | an empty path. */ | |
501 | if (libname == path) | |
502 | { | |
503 | libname = library + 1; | |
504 | path = xrealloc (path, 2); | |
505 | strcpy (path, "/"); | |
506 | } | |
507 | else | |
508 | { | |
509 | *libname = '\0'; | |
510 | ++libname; | |
511 | } | |
512 | } | |
513 | else | |
514 | { | |
515 | /* There's no path, construct one. */ | |
516 | libname = library; | |
517 | path = xrealloc (path, 2); | |
518 | strcpy (path, "."); | |
519 | } | |
520 | ||
b4a555d6 UD |
521 | if (opt_chroot) |
522 | { | |
523 | real_path = chroot_canon (opt_chroot, path); | |
524 | if (real_path == NULL) | |
525 | { | |
526 | error (0, errno, _("Can't find %s"), path); | |
527 | free (path); | |
528 | return; | |
529 | } | |
530 | real_library = alloca (strlen (real_path) + strlen (libname) + 2); | |
531 | sprintf (real_library, "%s/%s", real_path, libname); | |
532 | } | |
533 | else | |
534 | { | |
535 | real_path = path; | |
536 | real_library = library; | |
537 | } | |
538 | ||
b85697f6 | 539 | /* Do some sanity checks first. */ |
b4a555d6 | 540 | if (lstat64 (real_library, &stat_buf)) |
b85697f6 UD |
541 | { |
542 | error (0, errno, _("Can't lstat %s"), library); | |
543 | free (path); | |
544 | return; | |
545 | } | |
546 | /* We don't want links here! */ | |
547 | else if (!S_ISREG (stat_buf.st_mode)) | |
548 | { | |
549 | error (0, 0, _("Ignored file %s since it is not a regular file."), | |
550 | library); | |
551 | free (path); | |
552 | return; | |
553 | } | |
a986484f UD |
554 | if (process_file (real_library, library, libname, &flag, &osversion, |
555 | &soname, 0)) | |
b85697f6 UD |
556 | { |
557 | error (0, 0, _("No link created since soname could not be found for %s"), | |
558 | library); | |
559 | free (path); | |
560 | return; | |
561 | } | |
b4a555d6 | 562 | create_links (real_path, path, libname, soname); |
b85697f6 UD |
563 | free (soname); |
564 | free (path); | |
565 | } | |
566 | ||
567 | ||
591e1ffb UD |
568 | /* Read a whole directory and search for libraries. |
569 | The purpose is two-fold: | |
570 | - search for libraries which will be added to the cache | |
571 | - create symbolic links to the soname for each library | |
572 | ||
573 | This has to be done separatly for each directory. | |
45eca4d1 | 574 | |
591e1ffb UD |
575 | To keep track of which libraries to add to the cache and which |
576 | links to create, we save a list of all libraries. | |
577 | ||
578 | The algorithm is basically: | |
579 | for all libraries in the directory do | |
580 | get soname of library | |
581 | if soname is already in list | |
582 | if new library is newer, replace entry | |
583 | otherwise ignore this library | |
584 | otherwise add library to list | |
45eca4d1 | 585 | |
591e1ffb UD |
586 | For example, if the two libraries libxy.so.1.1 and libxy.so.1.2 |
587 | exist and both have the same soname, e.g. libxy.so, a symbolic link | |
588 | is created from libxy.so.1.2 (the newer one) to libxy.so. | |
589 | libxy.so.1.2 and libxy.so are added to the cache - but not | |
590 | libxy.so.1.1. */ | |
591 | ||
592 | /* Information for one library. */ | |
45eca4d1 | 593 | struct dlib_entry |
591e1ffb UD |
594 | { |
595 | char *name; | |
596 | char *soname; | |
597 | int flag; | |
598 | int is_link; | |
a986484f | 599 | unsigned int osversion; |
591e1ffb UD |
600 | struct dlib_entry *next; |
601 | }; | |
602 | ||
603 | ||
604 | static void | |
605 | search_dir (const struct dir_entry *entry) | |
606 | { | |
607 | DIR *dir; | |
2b510e91 | 608 | struct dirent64 *direntry; |
b4a555d6 UD |
609 | char *file_name, *dir_name, *real_file_name, *real_name; |
610 | int file_name_len, real_file_name_len, len; | |
591e1ffb UD |
611 | char *soname; |
612 | struct dlib_entry *dlibs; | |
613 | struct dlib_entry *dlib_ptr; | |
4ceae915 AJ |
614 | struct stat64 lstat_buf, stat_buf; |
615 | int is_link, is_dir; | |
a6c1c03a | 616 | uint64_t hwcap = path_hwcap (entry->path); |
a986484f | 617 | unsigned int osversion; |
45eca4d1 | 618 | |
7b0d235c AJ |
619 | file_name_len = PATH_MAX; |
620 | file_name = alloca (file_name_len); | |
f0189a54 | 621 | |
591e1ffb UD |
622 | dlibs = NULL; |
623 | ||
624 | if (opt_verbose) | |
45eca4d1 UD |
625 | { |
626 | if (hwcap != 0) | |
5a35dfca | 627 | printf ("%s: (hwcap: 0x%" PRIx64 ")\n", entry->path, hwcap); |
45eca4d1 UD |
628 | else |
629 | printf ("%s:\n", entry->path); | |
630 | } | |
631 | ||
b4a555d6 UD |
632 | if (opt_chroot) |
633 | { | |
634 | dir_name = chroot_canon (opt_chroot, entry->path); | |
635 | real_file_name_len = PATH_MAX; | |
636 | real_file_name = alloca (real_file_name_len); | |
637 | } | |
638 | else | |
639 | { | |
640 | dir_name = entry->path; | |
641 | real_file_name_len = 0; | |
642 | real_file_name = file_name; | |
643 | } | |
644 | ||
645 | if (dir_name == NULL || (dir = opendir (dir_name)) == NULL) | |
591e1ffb UD |
646 | { |
647 | if (opt_verbose) | |
648 | error (0, errno, _("Can't open directory %s"), entry->path); | |
b4a555d6 UD |
649 | if (opt_chroot && dir_name) |
650 | free (dir_name); | |
591e1ffb UD |
651 | return; |
652 | } | |
45eca4d1 | 653 | |
2b510e91 | 654 | while ((direntry = readdir64 (dir)) != NULL) |
591e1ffb UD |
655 | { |
656 | int flag; | |
657 | #ifdef _DIRENT_HAVE_D_TYPE | |
658 | /* We only look at links and regular files. */ | |
659 | if (direntry->d_type != DT_UNKNOWN | |
660 | && direntry->d_type != DT_LNK | |
45eca4d1 UD |
661 | && direntry->d_type != DT_REG |
662 | && direntry->d_type != DT_DIR) | |
591e1ffb UD |
663 | continue; |
664 | #endif /* _DIRENT_HAVE_D_TYPE */ | |
45eca4d1 UD |
665 | /* Does this file look like a shared library or is it a hwcap |
666 | subdirectory? The dynamic linker is also considered as | |
667 | shared library. */ | |
668 | if (((strncmp (direntry->d_name, "lib", 3) != 0 | |
669 | && strncmp (direntry->d_name, "ld-", 3) != 0) | |
670 | || strstr (direntry->d_name, ".so") == NULL) | |
95ce33a5 UD |
671 | && ( |
672 | #ifdef _DIRENT_HAVE_D_TYPE | |
673 | direntry->d_type == DT_REG || | |
674 | #endif | |
675 | !is_hwcap_platform (direntry->d_name))) | |
591e1ffb | 676 | continue; |
7b0d235c AJ |
677 | len = strlen (entry->path) + strlen (direntry->d_name); |
678 | if (len > file_name_len) | |
591e1ffb | 679 | { |
7b0d235c AJ |
680 | file_name_len = len + 1; |
681 | file_name = alloca (file_name_len); | |
b4a555d6 UD |
682 | if (!opt_chroot) |
683 | real_file_name = file_name; | |
684 | } | |
685 | sprintf (file_name, "%s/%s", entry->path, direntry->d_name); | |
686 | if (opt_chroot) | |
687 | { | |
688 | len = strlen (dir_name) + strlen (direntry->d_name); | |
689 | if (len > real_file_name_len) | |
690 | { | |
691 | real_file_name_len = len + 1; | |
692 | real_file_name = alloca (real_file_name_len); | |
693 | } | |
694 | sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name); | |
591e1ffb | 695 | } |
7c3002f0 UD |
696 | #ifdef _DIRENT_HAVE_D_TYPE |
697 | if (direntry->d_type != DT_UNKNOWN) | |
4ceae915 | 698 | lstat_buf.st_mode = DTTOIF (direntry->d_type); |
7c3002f0 UD |
699 | else |
700 | #endif | |
95ce33a5 | 701 | if (__builtin_expect (lstat64 (real_file_name, &lstat_buf), 0)) |
7c3002f0 | 702 | { |
95ce33a5 | 703 | error (0, errno, _("Cannot lstat %s"), file_name); |
7c3002f0 UD |
704 | continue; |
705 | } | |
706 | ||
4ceae915 AJ |
707 | is_link = S_ISLNK (lstat_buf.st_mode); |
708 | if (is_link) | |
709 | { | |
710 | /* In case of symlink, we check if the symlink refers to | |
711 | a directory. */ | |
95ce33a5 | 712 | if (__builtin_expect (stat64 (real_file_name, &stat_buf), 0)) |
4ceae915 | 713 | { |
8645ad47 | 714 | if (opt_verbose) |
95ce33a5 | 715 | error (0, errno, _("Cannot stat %s"), file_name); |
647eb037 UD |
716 | |
717 | /* Remove stale symlinks. */ | |
718 | if (strstr (direntry->d_name, ".so.")) | |
719 | unlink (real_file_name); | |
4ceae915 AJ |
720 | continue; |
721 | } | |
722 | is_dir = S_ISDIR (stat_buf.st_mode); | |
723 | } | |
724 | else | |
725 | is_dir = S_ISDIR (lstat_buf.st_mode); | |
726 | ||
727 | if (is_dir && is_hwcap_platform (direntry->d_name)) | |
45eca4d1 | 728 | { |
a8fd59b0 AJ |
729 | /* Handle subdirectory later. */ |
730 | struct dir_entry *new_entry; | |
731 | ||
732 | new_entry = xmalloc (sizeof (struct dir_entry)); | |
7b0d235c | 733 | new_entry->path = xstrdup (file_name); |
a8fd59b0 AJ |
734 | new_entry->flag = entry->flag; |
735 | new_entry->next = NULL; | |
4ceae915 AJ |
736 | if (is_link) |
737 | { | |
738 | new_entry->ino = stat_buf.st_ino; | |
739 | new_entry->dev = stat_buf.st_dev; | |
740 | } | |
741 | else | |
742 | { | |
95ce33a5 UD |
743 | #ifdef _DIRENT_HAVE_D_TYPE |
744 | /* We have filled in lstat only #ifndef | |
745 | _DIRENT_HAVE_D_TYPE. Fill it in if needed. */ | |
746 | if (direntry->d_type != DT_UNKNOWN | |
747 | && __builtin_expect (lstat64 (real_file_name, &lstat_buf), | |
748 | 0)) | |
749 | { | |
750 | error (0, errno, _("Cannot lstat %s"), file_name); | |
751 | free (new_entry->path); | |
752 | free (new_entry); | |
753 | continue; | |
754 | } | |
755 | #endif | |
756 | ||
4ceae915 AJ |
757 | new_entry->ino = lstat_buf.st_ino; |
758 | new_entry->dev = lstat_buf.st_dev; | |
759 | } | |
a8fd59b0 | 760 | add_single_dir (new_entry, 0); |
45eca4d1 UD |
761 | continue; |
762 | } | |
0f843f89 | 763 | else if (!S_ISREG (lstat_buf.st_mode) && !is_link) |
591e1ffb UD |
764 | continue; |
765 | ||
b4a555d6 UD |
766 | if (opt_chroot && is_link) |
767 | { | |
768 | real_name = chroot_canon (opt_chroot, file_name); | |
769 | if (real_name == NULL) | |
770 | { | |
771 | if (strstr (file_name, ".so") == NULL) | |
772 | error (0, 0, _("Input file %s not found.\n"), file_name); | |
773 | continue; | |
774 | } | |
775 | } | |
776 | else | |
777 | real_name = real_file_name; | |
591e1ffb | 778 | |
b4a555d6 | 779 | if (process_file (real_name, file_name, direntry->d_name, &flag, |
a986484f | 780 | &osversion, &soname, is_link)) |
b4a555d6 UD |
781 | { |
782 | if (real_name != real_file_name) | |
783 | free (real_name); | |
784 | continue; | |
785 | } | |
786 | ||
787 | if (real_name != real_file_name) | |
788 | free (real_name); | |
591e1ffb UD |
789 | |
790 | /* Links will just point to itself. */ | |
791 | if (is_link) | |
792 | { | |
793 | free (soname); | |
794 | soname = xstrdup (direntry->d_name); | |
795 | } | |
45eca4d1 | 796 | |
591e1ffb UD |
797 | if (flag == FLAG_ELF |
798 | && (entry->flag == FLAG_ELF_LIBC5 | |
799 | || entry->flag == FLAG_ELF_LIBC6)) | |
800 | flag = entry->flag; | |
801 | /* Some sanity checks to print warnings. */ | |
802 | if (opt_verbose) | |
803 | { | |
804 | if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5 | |
805 | && entry->flag != FLAG_ANY) | |
7b0d235c | 806 | error (0, 0, _("libc5 library %s in wrong directory"), file_name); |
591e1ffb UD |
807 | if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6 |
808 | && entry->flag != FLAG_ANY) | |
7b0d235c | 809 | error (0, 0, _("libc6 library %s in wrong directory"), file_name); |
591e1ffb UD |
810 | if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4 |
811 | && entry->flag != FLAG_ANY) | |
7b0d235c | 812 | error (0, 0, _("libc4 library %s in wrong directory"), file_name); |
591e1ffb | 813 | } |
45eca4d1 | 814 | |
591e1ffb UD |
815 | /* Add library to list. */ |
816 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) | |
817 | { | |
818 | /* Is soname already in list? */ | |
819 | if (strcmp (dlib_ptr->soname, soname) == 0) | |
820 | { | |
821 | /* Prefer a file to a link, otherwise check which one | |
822 | is newer. */ | |
823 | if ((!is_link && dlib_ptr->is_link) | |
824 | || (is_link == dlib_ptr->is_link | |
45eca4d1 | 825 | && _dl_cache_libcmp (dlib_ptr->name, direntry->d_name) < 0)) |
591e1ffb UD |
826 | { |
827 | /* It's newer - add it. */ | |
828 | /* Flag should be the same - sanity check. */ | |
829 | if (dlib_ptr->flag != flag) | |
830 | { | |
831 | if (dlib_ptr->flag == FLAG_ELF | |
832 | && (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6)) | |
833 | dlib_ptr->flag = flag; | |
834 | else if ((dlib_ptr->flag == FLAG_ELF_LIBC5 | |
835 | || dlib_ptr->flag == FLAG_ELF_LIBC6) | |
836 | && flag == FLAG_ELF) | |
837 | dlib_ptr->flag = flag; | |
838 | else | |
839 | error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), | |
840 | dlib_ptr->name, direntry->d_name, entry->path); | |
841 | } | |
842 | free (dlib_ptr->name); | |
b15ff9d6 | 843 | dlib_ptr->osversion = osversion; |
591e1ffb UD |
844 | dlib_ptr->name = xstrdup (direntry->d_name); |
845 | dlib_ptr->is_link = is_link; | |
846 | } | |
847 | /* Don't add this library, abort loop. */ | |
848 | /* Also free soname, since it's dynamically allocated. */ | |
849 | free (soname); | |
850 | break; | |
851 | } | |
852 | } | |
853 | /* Add the library if it's not already in. */ | |
854 | if (dlib_ptr == NULL) | |
855 | { | |
856 | dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry)); | |
857 | dlib_ptr->name = xstrdup (direntry->d_name); | |
858 | dlib_ptr->flag = flag; | |
a986484f | 859 | dlib_ptr->osversion = osversion; |
591e1ffb UD |
860 | dlib_ptr->soname = soname; |
861 | dlib_ptr->is_link = is_link; | |
862 | /* Add at head of list. */ | |
863 | dlib_ptr->next = dlibs; | |
864 | dlibs = dlib_ptr; | |
865 | } | |
866 | } | |
867 | ||
868 | closedir (dir); | |
869 | ||
870 | /* Now dlibs contains a list of all libs - add those to the cache | |
871 | and created all symbolic links. */ | |
872 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) | |
873 | { | |
874 | /* Don't create links to links. */ | |
875 | if (dlib_ptr->is_link == 0) | |
b4a555d6 UD |
876 | create_links (dir_name, entry->path, dlib_ptr->name, |
877 | dlib_ptr->soname); | |
591e1ffb | 878 | if (opt_build_cache) |
a986484f UD |
879 | add_to_cache (entry->path, dlib_ptr->soname, dlib_ptr->flag, |
880 | dlib_ptr->osversion, hwcap); | |
591e1ffb UD |
881 | } |
882 | ||
883 | /* Free all resources. */ | |
45eca4d1 | 884 | while (dlibs) |
591e1ffb UD |
885 | { |
886 | dlib_ptr = dlibs; | |
887 | free (dlib_ptr->soname); | |
888 | free (dlib_ptr->name); | |
889 | dlibs = dlibs->next; | |
890 | free (dlib_ptr); | |
891 | } | |
b4a555d6 UD |
892 | |
893 | if (opt_chroot && dir_name) | |
894 | free (dir_name); | |
591e1ffb UD |
895 | } |
896 | ||
897 | /* Search through all libraries. */ | |
898 | static void | |
899 | search_dirs (void) | |
900 | { | |
901 | struct dir_entry *entry; | |
902 | ||
903 | for (entry = dir_entries; entry != NULL; entry = entry->next) | |
904 | search_dir (entry); | |
905 | ||
906 | /* Free all allocated memory. */ | |
907 | while (dir_entries) | |
908 | { | |
909 | entry = dir_entries; | |
910 | dir_entries = dir_entries->next; | |
911 | free (entry->path); | |
912 | free (entry); | |
913 | } | |
914 | } | |
915 | ||
916 | ||
917 | /* Parse configuration file. */ | |
918 | static void | |
919 | parse_conf (const char *filename) | |
920 | { | |
b4a555d6 | 921 | FILE *file = NULL; |
591e1ffb | 922 | char *line = NULL; |
b4a555d6 | 923 | const char *canon; |
591e1ffb | 924 | size_t len = 0; |
45eca4d1 | 925 | |
b4a555d6 UD |
926 | if (opt_chroot) |
927 | { | |
928 | canon = chroot_canon (opt_chroot, filename); | |
929 | if (canon) | |
930 | file = fopen (canon, "r"); | |
931 | else | |
932 | canon = filename; | |
933 | } | |
934 | else | |
935 | { | |
936 | canon = filename; | |
937 | file = fopen (filename, "r"); | |
938 | } | |
591e1ffb UD |
939 | |
940 | if (file == NULL) | |
941 | { | |
b4a555d6 UD |
942 | error (0, errno, _("Can't open configuration file %s"), canon); |
943 | if (canon != filename) | |
944 | free ((char *) canon); | |
591e1ffb UD |
945 | return; |
946 | } | |
947 | ||
c96873d7 UD |
948 | /* No threads use this stream. */ |
949 | __fsetlocking (file, FSETLOCKING_BYCALLER); | |
950 | ||
b4a555d6 UD |
951 | if (canon != filename) |
952 | free ((char *) canon); | |
953 | ||
591e1ffb UD |
954 | do |
955 | { | |
956 | ssize_t n = getline (&line, &len, file); | |
957 | if (n < 0) | |
958 | break; | |
959 | ||
960 | if (line[n - 1] == '\n') | |
961 | line[n - 1] = '\0'; | |
962 | ||
963 | /* Because the file format does not know any form of quoting we | |
964 | can search forward for the next '#' character and if found | |
965 | make it terminating the line. */ | |
966 | *strchrnul (line, '#') = '\0'; | |
967 | ||
69acbe9f UD |
968 | /* Remove leading whitespace. NUL is no whitespace character. */ |
969 | char *cp = line; | |
970 | while (isspace (*cp)) | |
971 | ++cp; | |
972 | ||
591e1ffb | 973 | /* If the line is blank it is ignored. */ |
69acbe9f | 974 | if (cp[0] == '\0') |
591e1ffb UD |
975 | continue; |
976 | ||
69acbe9f UD |
977 | add_dir (cp); |
978 | } | |
979 | while (!feof_unlocked (file)); | |
591e1ffb UD |
980 | |
981 | /* Free buffer and close file. */ | |
982 | free (line); | |
983 | fclose (file); | |
984 | } | |
985 | ||
0cfbb8c6 UD |
986 | /* Honour LD_HWCAP_MASK. */ |
987 | static void | |
988 | set_hwcap (void) | |
989 | { | |
990 | char *mask = getenv ("LD_HWCAP_MASK"); | |
991 | ||
992 | if (mask) | |
993 | hwcap_mask = strtoul (mask, NULL, 0); | |
994 | } | |
995 | ||
591e1ffb UD |
996 | |
997 | int | |
998 | main (int argc, char **argv) | |
999 | { | |
1000 | int remaining; | |
45eca4d1 | 1001 | |
591e1ffb UD |
1002 | /* Parse and process arguments. */ |
1003 | argp_parse (&argp, argc, argv, 0, &remaining, NULL); | |
1004 | ||
b85697f6 UD |
1005 | /* Remaining arguments are additional libraries if opt_manual_link |
1006 | is not set. */ | |
1007 | if (remaining != argc && !opt_manual_link) | |
591e1ffb UD |
1008 | { |
1009 | int i; | |
1010 | for (i = remaining; i < argc; ++i) | |
a986484f | 1011 | add_dir (argv[i]); |
591e1ffb UD |
1012 | } |
1013 | ||
0cfbb8c6 UD |
1014 | set_hwcap (); |
1015 | ||
591e1ffb UD |
1016 | if (opt_chroot) |
1017 | { | |
f0189a54 UD |
1018 | /* Normalize the path a bit, we might need it for printing later. */ |
1019 | char *endp = strchr (opt_chroot, '\0'); | |
b4a555d6 | 1020 | while (endp > opt_chroot && endp[-1] == '/') |
f0189a54 UD |
1021 | --endp; |
1022 | *endp = '\0'; | |
b4a555d6 UD |
1023 | if (endp == opt_chroot) |
1024 | opt_chroot = NULL; | |
f0189a54 | 1025 | |
b4a555d6 UD |
1026 | if (opt_chroot) |
1027 | { | |
1028 | /* It is faster to use chroot if we can. */ | |
1029 | if (!chroot (opt_chroot)) | |
1030 | { | |
1031 | if (chdir ("/")) | |
1032 | error (EXIT_FAILURE, errno, _("Can't chdir to /")); | |
1033 | opt_chroot = NULL; | |
1034 | } | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | if (cache_file == NULL) | |
1039 | { | |
1040 | cache_file = alloca (strlen (LD_SO_CACHE) + 1); | |
1041 | strcpy (cache_file, LD_SO_CACHE); | |
591e1ffb UD |
1042 | } |
1043 | ||
b4a555d6 UD |
1044 | if (config_file == NULL) |
1045 | config_file = LD_SO_CONF; | |
1046 | ||
591e1ffb UD |
1047 | if (opt_print_cache) |
1048 | { | |
b4a555d6 UD |
1049 | if (opt_chroot) |
1050 | { | |
1051 | char *p = chroot_canon (opt_chroot, cache_file); | |
1052 | if (p == NULL) | |
1053 | error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"), | |
1054 | cache_file); | |
1055 | cache_file = p; | |
1056 | } | |
591e1ffb | 1057 | print_cache (cache_file); |
b4a555d6 UD |
1058 | if (opt_chroot) |
1059 | free (cache_file); | |
591e1ffb UD |
1060 | exit (0); |
1061 | } | |
1062 | ||
b4a555d6 UD |
1063 | if (opt_chroot) |
1064 | { | |
1065 | /* Canonicalize the directory name of cache_file, not cache_file, | |
1066 | because we'll rename a temporary cache file to it. */ | |
1067 | char *p = strrchr (cache_file, '/'); | |
1068 | char *canon = chroot_canon (opt_chroot, | |
1069 | p ? (*p = '\0', cache_file) : "/"); | |
1070 | ||
1071 | if (canon == NULL) | |
1072 | { | |
1073 | error (EXIT_FAILURE, errno, | |
1074 | _("Can't open cache file directory %s\n"), | |
1075 | p ? cache_file : "/"); | |
1076 | } | |
1077 | ||
1078 | if (p) | |
1079 | ++p; | |
1080 | else | |
1081 | p = cache_file; | |
1082 | ||
1083 | cache_file = alloca (strlen (canon) + strlen (p) + 2); | |
1084 | sprintf (cache_file, "%s/%s", canon, p); | |
1085 | free (canon); | |
1086 | } | |
1087 | ||
b85697f6 UD |
1088 | if (opt_manual_link) |
1089 | { | |
1090 | /* Link all given libraries manually. */ | |
1091 | int i; | |
1092 | ||
1093 | for (i = remaining; i < argc; ++i) | |
a986484f | 1094 | manual_link (argv[i]); |
b85697f6 UD |
1095 | |
1096 | exit (0); | |
1097 | } | |
45eca4d1 UD |
1098 | |
1099 | ||
591e1ffb UD |
1100 | if (opt_build_cache) |
1101 | init_cache (); | |
1102 | ||
1103 | if (!opt_only_cline) | |
1104 | { | |
1105 | /* Always add the standard search paths. */ | |
bd89c0b5 | 1106 | add_system_dir (SLIBDIR); |
8ca91b36 | 1107 | if (strcmp (SLIBDIR, LIBDIR)) |
bd89c0b5 | 1108 | add_system_dir (LIBDIR); |
591e1ffb UD |
1109 | |
1110 | parse_conf (config_file); | |
1111 | } | |
45eca4d1 | 1112 | |
591e1ffb UD |
1113 | search_dirs (); |
1114 | ||
1115 | if (opt_build_cache) | |
1116 | save_cache (cache_file); | |
1117 | ||
1118 | return 0; | |
1119 | } |