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591e1ffb UD |
1 | /* Copyright (C) 1999 Free Software Foundation, Inc. |
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 | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
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 | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include <argp.h> | |
21 | #include <dirent.h> | |
22 | #include <error.h> | |
23 | #include <errno.h> | |
24 | #include <libintl.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <unistd.h> | |
29 | #include <sys/fcntl.h> | |
30 | #include <sys/mman.h> | |
31 | #include <sys/stat.h> | |
32 | #include <sys/types.h> | |
33 | ||
34 | #include "ldconfig.h" | |
35 | ||
36 | #ifndef LD_SO_CACHE | |
37 | # define LD_SO_CACHE "/etc/ld.so.cache" | |
38 | #endif | |
39 | ||
40 | #ifndef LD_SO_CONF | |
41 | # define LD_SO_CONF "/etc/ld.so.conf" | |
42 | #endif | |
43 | ||
44 | /* Get libc version number. */ | |
45 | #include <version.h> | |
46 | ||
47 | #define PACKAGE _libc_intl_domainname | |
48 | ||
49 | struct lib_entry | |
50 | { | |
51 | int flags; | |
52 | char *lib; | |
53 | char *path; | |
54 | }; | |
55 | ||
56 | static const struct | |
57 | { | |
58 | const char *name; | |
59 | int flag; | |
60 | } lib_types [] = | |
61 | { | |
62 | {"libc4", FLAG_LIBC4}, | |
63 | {"libc5", FLAG_ELF_LIBC5}, | |
64 | {"libc6", FLAG_ELF_LIBC6}, | |
65 | {"glibc2", FLAG_ELF_LIBC6} | |
66 | }; | |
67 | ||
68 | ||
69 | /* List of directories to handle. */ | |
70 | struct dir_entry | |
71 | { | |
72 | char *path; | |
73 | int flag; | |
74 | struct dir_entry *next; | |
75 | }; | |
76 | ||
77 | /* The list is unsorted, contains no duplicates. Entries are added at | |
78 | the end. */ | |
79 | static struct dir_entry *dir_entries; | |
80 | ||
81 | /* Flags for different options. */ | |
82 | /* Print Cache. */ | |
83 | static int opt_print_cache = 0; | |
84 | ||
85 | /* Be verbose. */ | |
86 | int opt_verbose = 0; | |
87 | ||
88 | /* Build cache. */ | |
89 | static int opt_build_cache = 1; | |
90 | ||
91 | /* Generate links. */ | |
92 | static int opt_link = 1; | |
93 | ||
94 | /* Only process directories specified on the command line. */ | |
95 | static int opt_only_cline = 0; | |
96 | ||
97 | /* Path to root for chroot. */ | |
98 | static char *opt_chroot; | |
99 | ||
b85697f6 UD |
100 | /* Manually link given shared libraries. */ |
101 | static int opt_manual_link = 0; | |
102 | ||
591e1ffb UD |
103 | /* Cache file to use. */ |
104 | static const char *cache_file; | |
105 | ||
106 | /* Configuration file. */ | |
107 | static const char *config_file; | |
108 | ||
109 | /* Name and version of program. */ | |
110 | static void print_version (FILE *stream, struct argp_state *state); | |
111 | void (*argp_program_version_hook) (FILE *, struct argp_state *) | |
112 | = print_version; | |
113 | ||
114 | /* Definitions of arguments for argp functions. */ | |
115 | static const struct argp_option options[] = | |
116 | { | |
117 | { "print-cache", 'p', NULL, 0, N_("Print cache"), 0}, | |
118 | { "verbose", 'v', NULL, 0, N_("Generate verbose messages"), 0}, | |
119 | { NULL, 'N', NULL, 0, N_("Don't build cache"), 0}, | |
120 | { NULL, 'X', NULL, 0, N_("Don't generate links"), 0}, | |
121 | { NULL, 'r', "ROOT", 0, N_("Change to and use ROOT as root directory"), 0}, | |
122 | { NULL, 'C', "CACHE", 0, N_("Use CACHE as cache file"), 0}, | |
123 | { NULL, 'f', "CONF", 0, N_("Use CONF as configuration file"), 0}, | |
124 | { NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0}, | |
b85697f6 | 125 | { NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0}, |
591e1ffb UD |
126 | { NULL, 0, NULL, 0, NULL, 0 } |
127 | }; | |
128 | ||
129 | /* Short description of program. */ | |
130 | static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings."); | |
131 | ||
132 | /* Prototype for option handler. */ | |
133 | static error_t parse_opt (int key, char *arg, struct argp_state *state); | |
134 | ||
135 | /* Data structure to communicate with argp functions. */ | |
136 | static struct argp argp = | |
137 | { | |
138 | options, parse_opt, NULL, doc, NULL, NULL, NULL | |
139 | }; | |
140 | ||
141 | ||
142 | ||
143 | /* Handle program arguments. */ | |
144 | static error_t | |
145 | parse_opt (int key, char *arg, struct argp_state *state) | |
146 | { | |
147 | switch (key) | |
148 | { | |
149 | case 'C': | |
150 | cache_file = arg; | |
151 | break; | |
152 | case 'f': | |
153 | config_file = arg; | |
154 | break; | |
b85697f6 UD |
155 | case 'l': |
156 | opt_manual_link = 1; | |
157 | break; | |
591e1ffb UD |
158 | case 'N': |
159 | opt_build_cache = 0; | |
160 | break; | |
161 | case 'n': | |
162 | opt_build_cache = 0; | |
163 | opt_only_cline = 1; | |
164 | break; | |
165 | case 'p': | |
166 | opt_print_cache = 1; | |
167 | break; | |
168 | case 'r': | |
169 | opt_chroot = arg; | |
170 | break; | |
171 | case 'v': | |
172 | opt_verbose = 1; | |
173 | break; | |
174 | case 'X': | |
175 | opt_link = 0; | |
176 | break; | |
177 | default: | |
178 | return ARGP_ERR_UNKNOWN; | |
179 | } | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | /* Print the version information. */ | |
185 | static void | |
186 | print_version (FILE *stream, struct argp_state *state) | |
187 | { | |
188 | fprintf (stream, "ldconfig (GNU %s) %s\n", PACKAGE, VERSION); | |
189 | fprintf (stream, gettext ("\ | |
190 | Copyright (C) %s Free Software Foundation, Inc.\n\ | |
191 | This is free software; see the source for copying conditions. There is NO\n\ | |
192 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ | |
193 | "), "1999"); | |
194 | fprintf (stream, gettext ("Written by %s.\n"), | |
195 | "Andreas Jaeger"); | |
196 | } | |
197 | ||
198 | /* Add one directory to the list of directories to process. */ | |
199 | static void | |
200 | add_dir (const char *line) | |
201 | { | |
202 | char *equal_sign; | |
203 | struct dir_entry *entry, *ptr, *prev; | |
204 | unsigned int i; | |
205 | ||
206 | entry = xmalloc (sizeof (struct dir_entry)); | |
207 | entry->next = NULL; | |
208 | ||
209 | /* Search for an '=' sign. */ | |
210 | entry->path = xstrdup (line); | |
211 | equal_sign = strchr (entry->path, '='); | |
212 | if (equal_sign) | |
213 | { | |
214 | *equal_sign = '\0'; | |
215 | ++equal_sign; | |
216 | entry->flag = FLAG_ANY; | |
217 | for (i = 0; i < sizeof (lib_types) / sizeof (lib_types [0]); ++i) | |
218 | if (strcmp (equal_sign, lib_types[i].name) == 0) | |
219 | { | |
220 | entry->flag = lib_types[i].flag; | |
221 | break; | |
222 | } | |
223 | if (entry->flag == FLAG_ANY) | |
224 | error (0, 0, _("%s is not a known library type"), equal_sign); | |
225 | } | |
226 | else | |
227 | { | |
228 | entry->flag = FLAG_ANY; | |
229 | } | |
230 | ||
231 | /* Canonify path: for now only remove trailing slashes. */ | |
232 | i = strlen (entry->path) - 1; | |
233 | while (entry->path[i] == '/' && i > 0) | |
234 | { | |
235 | entry->path [i] = '\0'; | |
236 | --i; | |
237 | } | |
238 | ||
239 | ptr = dir_entries; | |
240 | prev = ptr; | |
241 | while (ptr != NULL) | |
242 | { | |
243 | /* Check for duplicates. */ | |
244 | if (strcmp (ptr->path, entry->path) == 0) | |
245 | { | |
246 | if (opt_verbose) | |
247 | error (0, 0, _("Path `%s' given more than once"), entry->path); | |
248 | /* Use the newer information. */ | |
249 | ptr->flag = entry->flag; | |
250 | free (entry); | |
251 | break; | |
252 | } | |
253 | prev = ptr; | |
254 | ptr = ptr->next; | |
255 | } | |
256 | /* Is this the first entry? */ | |
257 | if (ptr == NULL && dir_entries == NULL) | |
258 | dir_entries = entry; | |
259 | else if (ptr == NULL) | |
260 | prev->next = entry; | |
261 | } | |
262 | ||
263 | ||
264 | /* Create a symbolic link from soname to libname in directory path. */ | |
265 | static void | |
266 | create_links (const char *path, const char *libname, const char *soname) | |
267 | { | |
268 | char full_libname [PATH_MAX], full_soname [PATH_MAX]; | |
269 | struct stat stat_lib, stat_so, lstat_so; | |
270 | int do_link = 1; | |
271 | int do_remove = 1; | |
272 | /* XXX: The logics in this function should be simplified. */ | |
273 | ||
274 | /* Get complete path. */ | |
275 | snprintf (full_libname, sizeof full_libname, "%s/%s", path, libname); | |
276 | snprintf (full_soname, sizeof full_soname, "%s/%s", path, soname); | |
277 | ||
278 | /* Does soname already exist and point to the right library? */ | |
279 | if (stat (full_soname, &stat_so) == 0) | |
280 | { | |
281 | if (stat (full_libname, &stat_lib)) | |
282 | { | |
283 | error (0, 0, _("Can't stat %s\n"), full_libname); | |
284 | return; | |
285 | } | |
286 | if (stat_lib.st_dev == stat_so.st_dev | |
287 | && stat_lib.st_ino == stat_so.st_ino) | |
288 | /* Link is already correct. */ | |
289 | do_link = 0; | |
290 | else if (lstat (full_soname, &lstat_so) == 0 | |
291 | && !S_ISLNK (lstat_so.st_mode)) | |
292 | { | |
293 | error (0, 0, _("%s is not a symbolic link\n"), full_soname); | |
294 | do_link = 0; | |
295 | do_remove = 0; | |
296 | } | |
297 | } | |
298 | else if (lstat (full_soname, &lstat_so) != 0 | |
299 | || !S_ISLNK (lstat_so.st_mode)) | |
300 | /* Unless it is a stale symlink, there is no need to remove. */ | |
301 | do_remove = 0; | |
302 | ||
303 | if (opt_verbose) | |
304 | printf ("\t%s -> %s", soname, libname); | |
305 | ||
306 | if (do_link && opt_link) | |
307 | { | |
308 | /* Remove old link. */ | |
309 | if (do_remove) | |
310 | if (unlink (full_soname)) | |
311 | { | |
312 | error (0, 0, _("Can't unlink %s"), full_soname); | |
313 | do_link = 0; | |
314 | } | |
315 | /* Create symbolic link. */ | |
316 | if (do_link && symlink (libname, full_soname)) | |
317 | { | |
318 | error (0, 0, _("Can't link %s to %s"), full_soname, libname); | |
319 | do_link = 0; | |
320 | } | |
321 | if (opt_verbose) | |
322 | { | |
323 | if (do_link) | |
324 | fputs (_(" (changed)\n"), stdout); | |
325 | else | |
326 | fputs (_(" (SKIPPED)\n"), stdout); | |
327 | } | |
328 | } | |
329 | else if (opt_verbose) | |
330 | fputs ("\n", stdout); | |
331 | } | |
332 | ||
b85697f6 UD |
333 | /* Manually link the given library. */ |
334 | static void | |
335 | manual_link (char *library) | |
336 | { | |
337 | char *path; | |
338 | char *libname; | |
339 | char *soname; | |
340 | struct stat stat_buf; | |
341 | int flag; | |
342 | ||
343 | /* Prepare arguments for create_links call. Split library name in | |
344 | directory and filename first. Since path is allocated, we've got | |
345 | to be careful to free at the end. */ | |
346 | path = xstrdup (library); | |
347 | libname = strrchr (path, '/'); | |
348 | ||
349 | if (libname) | |
350 | { | |
351 | /* Successfully split names. Check if path is just "/" to avoid | |
352 | an empty path. */ | |
353 | if (libname == path) | |
354 | { | |
355 | libname = library + 1; | |
356 | path = xrealloc (path, 2); | |
357 | strcpy (path, "/"); | |
358 | } | |
359 | else | |
360 | { | |
361 | *libname = '\0'; | |
362 | ++libname; | |
363 | } | |
364 | } | |
365 | else | |
366 | { | |
367 | /* There's no path, construct one. */ | |
368 | libname = library; | |
369 | path = xrealloc (path, 2); | |
370 | strcpy (path, "."); | |
371 | } | |
372 | ||
373 | /* Do some sanity checks first. */ | |
374 | if (lstat (library, &stat_buf)) | |
375 | { | |
376 | error (0, errno, _("Can't lstat %s"), library); | |
377 | free (path); | |
378 | return; | |
379 | } | |
380 | /* We don't want links here! */ | |
381 | else if (!S_ISREG (stat_buf.st_mode)) | |
382 | { | |
383 | error (0, 0, _("Ignored file %s since it is not a regular file."), | |
384 | library); | |
385 | free (path); | |
386 | return; | |
387 | } | |
388 | libname = basename (library); | |
389 | if (process_file (library, libname, &flag, &soname, 0)) | |
390 | { | |
391 | error (0, 0, _("No link created since soname could not be found for %s"), | |
392 | library); | |
393 | free (path); | |
394 | return; | |
395 | } | |
396 | create_links (path, libname, soname); | |
397 | free (soname); | |
398 | free (path); | |
399 | } | |
400 | ||
401 | ||
591e1ffb UD |
402 | /* Read a whole directory and search for libraries. |
403 | The purpose is two-fold: | |
404 | - search for libraries which will be added to the cache | |
405 | - create symbolic links to the soname for each library | |
406 | ||
407 | This has to be done separatly for each directory. | |
408 | ||
409 | To keep track of which libraries to add to the cache and which | |
410 | links to create, we save a list of all libraries. | |
411 | ||
412 | The algorithm is basically: | |
413 | for all libraries in the directory do | |
414 | get soname of library | |
415 | if soname is already in list | |
416 | if new library is newer, replace entry | |
417 | otherwise ignore this library | |
418 | otherwise add library to list | |
419 | ||
420 | For example, if the two libraries libxy.so.1.1 and libxy.so.1.2 | |
421 | exist and both have the same soname, e.g. libxy.so, a symbolic link | |
422 | is created from libxy.so.1.2 (the newer one) to libxy.so. | |
423 | libxy.so.1.2 and libxy.so are added to the cache - but not | |
424 | libxy.so.1.1. */ | |
425 | ||
426 | /* Information for one library. */ | |
427 | struct dlib_entry | |
428 | { | |
429 | char *name; | |
430 | char *soname; | |
431 | int flag; | |
432 | int is_link; | |
433 | struct dlib_entry *next; | |
434 | }; | |
435 | ||
436 | ||
437 | static void | |
438 | search_dir (const struct dir_entry *entry) | |
439 | { | |
440 | DIR *dir; | |
441 | struct dirent *direntry; | |
442 | char buf [PATH_MAX]; | |
443 | char *soname; | |
444 | struct dlib_entry *dlibs; | |
445 | struct dlib_entry *dlib_ptr; | |
446 | int nchars; | |
447 | struct stat stat_buf; | |
448 | int is_link; | |
449 | ||
450 | dlibs = NULL; | |
451 | ||
452 | if (opt_verbose) | |
453 | printf ("%s:\n", entry->path); | |
454 | ||
455 | dir = opendir (entry->path); | |
456 | if (dir == NULL) | |
457 | { | |
458 | if (opt_verbose) | |
459 | error (0, errno, _("Can't open directory %s"), entry->path); | |
460 | return; | |
461 | } | |
462 | ||
463 | ||
464 | while ((direntry = readdir (dir)) != NULL) | |
465 | { | |
466 | int flag; | |
467 | #ifdef _DIRENT_HAVE_D_TYPE | |
468 | /* We only look at links and regular files. */ | |
469 | if (direntry->d_type != DT_UNKNOWN | |
470 | && direntry->d_type != DT_LNK | |
471 | && direntry->d_type != DT_REG) | |
472 | continue; | |
473 | #endif /* _DIRENT_HAVE_D_TYPE */ | |
474 | ||
475 | /* Does this file look like a shared library? The dynamic | |
476 | linker is also considered as shared library. */ | |
477 | if ((strncmp (direntry->d_name, "lib", 3) != 0 | |
478 | && strncmp (direntry->d_name, "ld-", 3) != 0) | |
479 | || strstr (direntry->d_name, ".so") == NULL) | |
480 | continue; | |
481 | nchars = snprintf (buf, sizeof (buf), "%s/%s", entry->path, | |
482 | direntry->d_name); | |
483 | /* Check for overflow. */ | |
484 | if (nchars >= (int) sizeof (buf)) | |
485 | { | |
486 | error (0, 0, _("buffer for snprintf too small for %s/%s--file is ignored\n"), | |
487 | entry->path, direntry->d_name); | |
488 | continue; | |
489 | } | |
490 | if (lstat (buf, &stat_buf)) | |
491 | { | |
492 | error (0, errno, _("Can't lstat %s"), buf); | |
493 | continue; | |
494 | } | |
495 | else if (!S_ISREG (stat_buf.st_mode) && !S_ISLNK (stat_buf.st_mode)) | |
496 | continue; | |
497 | ||
498 | is_link = S_ISLNK (stat_buf.st_mode); | |
499 | ||
500 | if (process_file (buf, direntry->d_name, &flag, &soname, is_link)) | |
501 | continue; | |
502 | ||
503 | /* Links will just point to itself. */ | |
504 | if (is_link) | |
505 | { | |
506 | free (soname); | |
507 | soname = xstrdup (direntry->d_name); | |
508 | } | |
509 | ||
510 | if (flag == FLAG_ELF | |
511 | && (entry->flag == FLAG_ELF_LIBC5 | |
512 | || entry->flag == FLAG_ELF_LIBC6)) | |
513 | flag = entry->flag; | |
514 | /* Some sanity checks to print warnings. */ | |
515 | if (opt_verbose) | |
516 | { | |
517 | if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5 | |
518 | && entry->flag != FLAG_ANY) | |
519 | error (0, 0, _("libc5 library %s in wrong directory"), buf); | |
520 | if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6 | |
521 | && entry->flag != FLAG_ANY) | |
522 | error (0, 0, _("libc6 library %s in wrong directory"), buf); | |
523 | if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4 | |
524 | && entry->flag != FLAG_ANY) | |
525 | error (0, 0, _("libc4 library %s in wrong directory"), buf); | |
526 | } | |
527 | ||
528 | /* Add library to list. */ | |
529 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) | |
530 | { | |
531 | /* Is soname already in list? */ | |
532 | if (strcmp (dlib_ptr->soname, soname) == 0) | |
533 | { | |
534 | /* Prefer a file to a link, otherwise check which one | |
535 | is newer. */ | |
536 | if ((!is_link && dlib_ptr->is_link) | |
537 | || (is_link == dlib_ptr->is_link | |
538 | && cache_libcmp (dlib_ptr->name, direntry->d_name) < 0)) | |
539 | { | |
540 | /* It's newer - add it. */ | |
541 | /* Flag should be the same - sanity check. */ | |
542 | if (dlib_ptr->flag != flag) | |
543 | { | |
544 | if (dlib_ptr->flag == FLAG_ELF | |
545 | && (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6)) | |
546 | dlib_ptr->flag = flag; | |
547 | else if ((dlib_ptr->flag == FLAG_ELF_LIBC5 | |
548 | || dlib_ptr->flag == FLAG_ELF_LIBC6) | |
549 | && flag == FLAG_ELF) | |
550 | dlib_ptr->flag = flag; | |
551 | else | |
552 | error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), | |
553 | dlib_ptr->name, direntry->d_name, entry->path); | |
554 | } | |
555 | free (dlib_ptr->name); | |
556 | dlib_ptr->name = xstrdup (direntry->d_name); | |
557 | dlib_ptr->is_link = is_link; | |
558 | } | |
559 | /* Don't add this library, abort loop. */ | |
560 | /* Also free soname, since it's dynamically allocated. */ | |
561 | free (soname); | |
562 | break; | |
563 | } | |
564 | } | |
565 | /* Add the library if it's not already in. */ | |
566 | if (dlib_ptr == NULL) | |
567 | { | |
568 | dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry)); | |
569 | dlib_ptr->name = xstrdup (direntry->d_name); | |
570 | dlib_ptr->flag = flag; | |
571 | dlib_ptr->soname = soname; | |
572 | dlib_ptr->is_link = is_link; | |
573 | /* Add at head of list. */ | |
574 | dlib_ptr->next = dlibs; | |
575 | dlibs = dlib_ptr; | |
576 | } | |
577 | } | |
578 | ||
579 | closedir (dir); | |
580 | ||
581 | /* Now dlibs contains a list of all libs - add those to the cache | |
582 | and created all symbolic links. */ | |
583 | for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) | |
584 | { | |
585 | /* Don't create links to links. */ | |
586 | if (dlib_ptr->is_link == 0) | |
587 | create_links (entry->path, dlib_ptr->name, dlib_ptr->soname); | |
588 | if (opt_build_cache) | |
589 | add_to_cache (entry->path, dlib_ptr->soname, dlib_ptr->flag); | |
590 | } | |
591 | ||
592 | /* Free all resources. */ | |
593 | while (dlibs) | |
594 | { | |
595 | dlib_ptr = dlibs; | |
596 | free (dlib_ptr->soname); | |
597 | free (dlib_ptr->name); | |
598 | dlibs = dlibs->next; | |
599 | free (dlib_ptr); | |
600 | } | |
601 | } | |
602 | ||
603 | /* Search through all libraries. */ | |
604 | static void | |
605 | search_dirs (void) | |
606 | { | |
607 | struct dir_entry *entry; | |
608 | ||
609 | for (entry = dir_entries; entry != NULL; entry = entry->next) | |
610 | search_dir (entry); | |
611 | ||
612 | /* Free all allocated memory. */ | |
613 | while (dir_entries) | |
614 | { | |
615 | entry = dir_entries; | |
616 | dir_entries = dir_entries->next; | |
617 | free (entry->path); | |
618 | free (entry); | |
619 | } | |
620 | } | |
621 | ||
622 | ||
623 | /* Parse configuration file. */ | |
624 | static void | |
625 | parse_conf (const char *filename) | |
626 | { | |
627 | FILE *file; | |
628 | char *line = NULL; | |
629 | size_t len = 0; | |
630 | ||
631 | file = fopen (filename, "r"); | |
632 | ||
633 | if (file == NULL) | |
634 | { | |
635 | error (0, errno, _("Can't open configuration file %s"), filename); | |
636 | return; | |
637 | } | |
638 | ||
639 | do | |
640 | { | |
641 | ssize_t n = getline (&line, &len, file); | |
642 | if (n < 0) | |
643 | break; | |
644 | ||
645 | if (line[n - 1] == '\n') | |
646 | line[n - 1] = '\0'; | |
647 | ||
648 | /* Because the file format does not know any form of quoting we | |
649 | can search forward for the next '#' character and if found | |
650 | make it terminating the line. */ | |
651 | *strchrnul (line, '#') = '\0'; | |
652 | ||
653 | /* If the line is blank it is ignored. */ | |
654 | if (line[0] == '\0') | |
655 | continue; | |
656 | ||
657 | add_dir (line); | |
658 | } while (!feof (file)); | |
659 | ||
660 | /* Free buffer and close file. */ | |
661 | free (line); | |
662 | fclose (file); | |
663 | } | |
664 | ||
665 | ||
666 | int | |
667 | main (int argc, char **argv) | |
668 | { | |
669 | int remaining; | |
670 | ||
671 | /* Parse and process arguments. */ | |
672 | argp_parse (&argp, argc, argv, 0, &remaining, NULL); | |
673 | ||
b85697f6 UD |
674 | /* Remaining arguments are additional libraries if opt_manual_link |
675 | is not set. */ | |
676 | if (remaining != argc && !opt_manual_link) | |
591e1ffb UD |
677 | { |
678 | int i; | |
679 | for (i = remaining; i < argc; ++i) | |
680 | add_dir (argv [i]); | |
681 | } | |
682 | ||
683 | if (cache_file == NULL) | |
684 | cache_file = LD_SO_CACHE; | |
685 | ||
686 | if (config_file == NULL) | |
687 | config_file = LD_SO_CONF; | |
688 | ||
689 | /* Chroot first. */ | |
690 | if (opt_chroot) | |
691 | { | |
692 | if (chroot (opt_chroot)) | |
693 | /* Report failure and exit program. */ | |
694 | error (EXIT_FAILURE, errno, _("Can't chroot to %s"), opt_chroot); | |
695 | /* chroot doesn't change the working directory, let's play safe. */ | |
696 | if (chdir ("/")) | |
697 | error (EXIT_FAILURE, errno, _("Can't chdir to /")); | |
698 | } | |
699 | ||
700 | if (opt_print_cache) | |
701 | { | |
702 | print_cache (cache_file); | |
703 | exit (0); | |
704 | } | |
705 | ||
b85697f6 UD |
706 | if (opt_manual_link) |
707 | { | |
708 | /* Link all given libraries manually. */ | |
709 | int i; | |
710 | ||
711 | for (i = remaining; i < argc; ++i) | |
712 | manual_link (argv [i]); | |
713 | ||
714 | exit (0); | |
715 | } | |
716 | ||
717 | ||
591e1ffb UD |
718 | if (opt_build_cache) |
719 | init_cache (); | |
720 | ||
721 | if (!opt_only_cline) | |
722 | { | |
723 | /* Always add the standard search paths. */ | |
724 | add_dir ("/lib"); | |
725 | add_dir ("/usr/lib"); | |
726 | ||
727 | parse_conf (config_file); | |
728 | } | |
729 | ||
730 | search_dirs (); | |
731 | ||
732 | if (opt_build_cache) | |
733 | save_cache (cache_file); | |
734 | ||
735 | return 0; | |
736 | } |