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1479465f GJ |
1 | /* |
2 | * update-alternatives | |
3 | * | |
4 | * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk> | |
5 | * Copyright © 2000-2002 Wichert Akkerman <wakkerma@debian.org> | |
6 | * Copyright © 2006-2015 Guillem Jover <guillem@debian.org> | |
7 | * Copyright © 2008 Pierre Habouzit <madcoder@debian.org> | |
8 | * Copyright © 2009-2010 Raphaël Hertzog <hertzog@debian.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
22 | */ | |
23 | ||
24 | #include <config.h> | |
25 | #include <compat.h> | |
26 | ||
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
29 | #include <sys/wait.h> | |
30 | ||
31 | #include <errno.h> | |
32 | #include <stdarg.h> | |
33 | #include <stdbool.h> | |
34 | #include <stdlib.h> | |
35 | #include <stdio.h> | |
36 | #include <unistd.h> | |
37 | #include <string.h> | |
38 | #include <dirent.h> | |
39 | #include <time.h> | |
40 | #include <setjmp.h> | |
41 | #include <assert.h> | |
42 | #include <locale.h> | |
43 | #include <ctype.h> | |
44 | #include <limits.h> | |
45 | ||
46 | #include <dpkg/macros.h> | |
47 | #include <dpkg/i18n.h> | |
48 | ||
49 | /* Global variables: */ | |
50 | ||
51 | #define PROGNAME "update-alternatives" | |
52 | ||
53 | static const char *altdir = SYSCONFDIR "/alternatives"; | |
54 | static const char *admdir; | |
55 | ||
56 | static const char *prog_path = "update-alternatives"; | |
57 | ||
58 | /* Action to perform */ | |
59 | static const char *action = NULL; | |
60 | static const char *log_file = LOGDIR "/alternatives.log"; | |
61 | /* Skip alternatives properly configured in auto mode (for --config) */ | |
62 | static int opt_skip_auto = 0; | |
63 | static int opt_verbose = 0; | |
64 | static int opt_force = 0; | |
65 | ||
66 | /* | |
67 | * Functions. | |
68 | */ | |
69 | ||
70 | static void | |
71 | version(void) | |
72 | { | |
73 | printf(_("Debian %s version %s.\n"), PROGNAME, VERSION); | |
74 | printf("\n"); | |
75 | ||
76 | printf(_( | |
77 | "This is free software; see the GNU General Public License version 2 or\n" | |
78 | "later for copying conditions. There is NO warranty.\n")); | |
79 | } | |
80 | ||
81 | static void | |
82 | usage(void) | |
83 | { | |
84 | printf(_( | |
85 | "Usage: %s [<option> ...] <command>\n" | |
86 | "\n"), PROGNAME); | |
87 | ||
88 | printf(_( | |
89 | "Commands:\n" | |
90 | " --install <link> <name> <path> <priority>\n" | |
91 | " [--slave <link> <name> <path>] ...\n" | |
92 | " add a group of alternatives to the system.\n" | |
93 | " --remove <name> <path> remove <path> from the <name> group alternative.\n" | |
94 | " --remove-all <name> remove <name> group from the alternatives system.\n" | |
95 | " --auto <name> switch the master link <name> to automatic mode.\n" | |
96 | " --display <name> display information about the <name> group.\n" | |
97 | " --query <name> machine parseable version of --display <name>.\n" | |
98 | " --list <name> display all targets of the <name> group.\n" | |
99 | " --get-selections list master alternative names and their status.\n" | |
100 | " --set-selections read alternative status from standard input.\n" | |
101 | " --config <name> show alternatives for the <name> group and ask the\n" | |
102 | " user to select which one to use.\n" | |
103 | " --set <name> <path> set <path> as alternative for <name>.\n" | |
104 | " --all call --config on all alternatives.\n" | |
105 | "\n")); | |
106 | ||
107 | printf(_( | |
108 | "<link> is the symlink pointing to %s/<name>.\n" | |
109 | " (e.g. /usr/bin/pager)\n" | |
110 | "<name> is the master name for this link group.\n" | |
111 | " (e.g. pager)\n" | |
112 | "<path> is the location of one of the alternative target files.\n" | |
113 | " (e.g. /usr/bin/less)\n" | |
114 | "<priority> is an integer; options with higher numbers have higher priority in\n" | |
115 | " automatic mode.\n" | |
116 | "\n"), altdir); | |
117 | ||
118 | printf(_( | |
119 | "Options:\n" | |
120 | " --altdir <directory> change the alternatives directory.\n" | |
121 | " --admindir <directory> change the administrative directory.\n" | |
122 | " --log <file> change the log file.\n" | |
123 | " --force allow replacing files with alternative links.\n" | |
124 | " --skip-auto skip prompt for alternatives correctly configured\n" | |
125 | " in automatic mode (relevant for --config only)\n" | |
126 | " --verbose verbose operation, more output.\n" | |
127 | " --quiet quiet operation, minimal output.\n" | |
128 | " --help show this help message.\n" | |
129 | " --version show the version.\n" | |
130 | )); | |
131 | } | |
132 | ||
133 | static void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(1) | |
134 | error(char const *fmt, ...) | |
135 | { | |
136 | va_list args; | |
137 | ||
138 | fprintf(stderr, "%s: %s: ", PROGNAME, _("error")); | |
139 | va_start(args, fmt); | |
140 | vfprintf(stderr, fmt, args); | |
141 | va_end(args); | |
142 | fprintf(stderr, "\n"); | |
143 | exit(2); | |
144 | } | |
145 | ||
146 | static void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(1) | |
147 | syserr(char const *fmt, ...) | |
148 | { | |
149 | va_list args; | |
150 | ||
151 | fprintf(stderr, "%s: %s: ", PROGNAME, _("error")); | |
152 | va_start(args, fmt); | |
153 | vfprintf(stderr, fmt, args); | |
154 | va_end(args); | |
155 | fprintf(stderr, ": %s\n", strerror(errno)); | |
156 | exit(2); | |
157 | } | |
158 | ||
159 | static void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(1) | |
160 | badusage(char const *fmt, ...) | |
161 | { | |
162 | va_list args; | |
163 | ||
164 | fprintf(stderr, "%s: ", PROGNAME); | |
165 | va_start(args, fmt); | |
166 | vfprintf(stderr, fmt, args); | |
167 | va_end(args); | |
168 | fprintf(stderr, "\n\n"); | |
169 | fprintf(stderr, _("Use '%s --help' for program usage information."), | |
170 | PROGNAME); | |
171 | fprintf(stderr, "\n"); | |
172 | exit(2); | |
173 | } | |
174 | ||
175 | static void DPKG_ATTR_PRINTF(1) | |
176 | warning(char const *fmt, ...) | |
177 | { | |
178 | va_list args; | |
179 | ||
180 | if (opt_verbose < 0) | |
181 | return; | |
182 | ||
183 | fprintf(stderr, "%s: %s: ", PROGNAME, _("warning")); | |
184 | va_start(args, fmt); | |
185 | vfprintf(stderr, fmt, args); | |
186 | va_end(args); | |
187 | fprintf(stderr, "\n"); | |
188 | } | |
189 | ||
190 | static void DPKG_ATTR_PRINTF(1) | |
191 | debug(char const *fmt, ...) | |
192 | { | |
193 | #if 0 | |
194 | va_list args; | |
195 | ||
196 | fprintf(stderr, "DEBUG: "); | |
197 | va_start(args, fmt); | |
198 | vfprintf(stderr, fmt, args); | |
199 | va_end(args); | |
200 | fprintf(stderr, "\n"); | |
201 | #endif | |
202 | } | |
203 | ||
204 | static void DPKG_ATTR_PRINTF(1) | |
205 | verbose(char const *fmt, ...) | |
206 | { | |
207 | va_list args; | |
208 | ||
209 | if (opt_verbose < 1) | |
210 | return; | |
211 | ||
212 | printf("%s: ", PROGNAME); | |
213 | va_start(args, fmt); | |
214 | vprintf(fmt, args); | |
215 | va_end(args); | |
216 | printf("\n"); | |
217 | } | |
218 | ||
219 | static void DPKG_ATTR_PRINTF(1) | |
220 | info(char const *fmt, ...) | |
221 | { | |
222 | va_list args; | |
223 | ||
224 | if (opt_verbose < 0) | |
225 | return; | |
226 | ||
227 | printf("%s: ", PROGNAME); | |
228 | va_start(args, fmt); | |
229 | vprintf(fmt, args); | |
230 | va_end(args); | |
231 | printf("\n"); | |
232 | } | |
233 | ||
234 | static void DPKG_ATTR_PRINTF(1) | |
235 | pr(char const *fmt, ...) | |
236 | { | |
237 | va_list args; | |
238 | ||
239 | va_start(args, fmt); | |
240 | vprintf(fmt, args); | |
241 | va_end(args); | |
242 | printf("\n"); | |
243 | } | |
244 | ||
245 | static void * | |
246 | xmalloc(size_t size) | |
247 | { | |
248 | void *ptr; | |
249 | ||
250 | ptr = malloc(size); | |
251 | if (!ptr) | |
252 | error(_("malloc failed (%zu bytes)"), size); | |
253 | ||
254 | return ptr; | |
255 | } | |
256 | ||
257 | static char * | |
258 | xstrdup(const char *str) | |
259 | { | |
260 | char *new_str; | |
261 | ||
262 | if (!str) | |
263 | return NULL; | |
264 | ||
265 | new_str = strdup(str); | |
266 | if (!new_str) | |
267 | error(_("failed to allocate memory")); | |
268 | ||
269 | return new_str; | |
270 | } | |
271 | ||
272 | static char * DPKG_ATTR_VPRINTF(1) | |
273 | xvasprintf(const char *fmt, va_list args) | |
274 | { | |
275 | char *str; | |
276 | ||
277 | if (vasprintf(&str, fmt, args) < 0) | |
278 | error(_("failed to allocate memory")); | |
279 | ||
280 | return str; | |
281 | } | |
282 | ||
283 | static char * DPKG_ATTR_PRINTF(1) | |
284 | xasprintf(const char *fmt, ...) | |
285 | { | |
286 | va_list args; | |
287 | char *str; | |
288 | ||
289 | va_start(args, fmt); | |
290 | str = xvasprintf(fmt, args); | |
291 | va_end(args); | |
292 | ||
293 | return str; | |
294 | } | |
295 | ||
296 | static char * | |
297 | areadlink(const char *linkname) | |
298 | { | |
299 | struct stat st; | |
300 | char *buf; | |
301 | ssize_t size; | |
302 | ||
303 | /* Allocate required memory to store the value of the symlink */ | |
304 | if (lstat(linkname, &st)) | |
305 | return NULL; | |
306 | ||
307 | if (!S_ISLNK(st.st_mode)) { | |
308 | errno = EINVAL; | |
309 | return NULL; | |
310 | } | |
311 | ||
312 | buf = xmalloc(st.st_size + 1); | |
313 | ||
314 | /* Read it and terminate the string properly */ | |
315 | size = readlink(linkname, buf, st.st_size); | |
316 | if (size == -1) { | |
317 | int saved_errno = errno; | |
318 | ||
319 | free(buf); | |
320 | errno = saved_errno; | |
321 | ||
322 | return NULL; | |
323 | } | |
324 | buf[size] = '\0'; | |
325 | ||
326 | return buf; | |
327 | } | |
328 | ||
329 | static char * | |
330 | xreadlink(const char *linkname) | |
331 | { | |
332 | char *buf; | |
333 | ||
334 | buf = areadlink(linkname); | |
335 | if (buf == NULL) | |
336 | syserr(_("unable to read link '%.255s'"), linkname); | |
337 | ||
338 | return buf; | |
339 | } | |
340 | ||
341 | static bool | |
342 | pathname_is_missing(const char *pathname) | |
343 | { | |
344 | struct stat st; | |
345 | ||
346 | errno = 0; | |
347 | if (stat(pathname, &st) == 0) | |
348 | return false; | |
349 | ||
350 | if (errno == ENOENT) | |
351 | return true; | |
352 | ||
353 | syserr(_("cannot stat file '%s'"), pathname); | |
354 | } | |
355 | ||
356 | static void | |
357 | set_action(const char *new_action) | |
358 | { | |
359 | if (action) | |
360 | badusage(_("two commands specified: --%s and --%s"), | |
361 | action, new_action); | |
362 | action = new_action; | |
363 | } | |
364 | ||
365 | static const char * | |
366 | admindir_init(void) | |
367 | { | |
368 | const char *basedir, *basedir_env; | |
369 | ||
370 | /* Try to get the admindir from an environment variable, usually set | |
371 | * by the system package manager. */ | |
372 | basedir_env = getenv(ADMINDIR_ENVVAR); | |
373 | if (basedir_env) | |
374 | basedir = basedir_env; | |
375 | else | |
376 | basedir = ADMINDIR; | |
377 | ||
378 | return xasprintf("%s/%s", basedir, "alternatives"); | |
379 | } | |
380 | ||
381 | static FILE *fh_log = NULL; | |
382 | ||
383 | static void DPKG_ATTR_PRINTF(1) | |
384 | log_msg(const char *fmt, ...) | |
385 | { | |
386 | va_list args; | |
387 | ||
388 | if (fh_log == NULL) { | |
389 | fh_log = fopen(log_file, "a"); | |
390 | if (fh_log == NULL && errno != EACCES) | |
391 | syserr(_("cannot append to '%s'"), log_file); | |
392 | } | |
393 | ||
394 | if (fh_log) { | |
395 | char timestamp[64]; | |
396 | time_t now; | |
397 | ||
398 | time(&now); | |
399 | strftime(timestamp, sizeof(timestamp), "%Y-%m-%d %H:%M:%S", | |
400 | localtime(&now)); | |
401 | fprintf(fh_log, "%s %s: ", PROGNAME, timestamp); | |
402 | va_start(args, fmt); | |
403 | vfprintf(fh_log, fmt, args); | |
404 | va_end(args); | |
405 | fprintf(fh_log, "\n"); | |
406 | } | |
407 | } | |
408 | ||
409 | static int | |
410 | spawn(const char *prog, const char *args[]) | |
411 | { | |
412 | pid_t pid, dead_pid; | |
413 | int status; | |
414 | ||
415 | pid = fork(); | |
416 | if (pid == -1) | |
417 | error(_("fork failed")); | |
418 | if (pid == 0) { | |
419 | execvp(prog, (char *const *)args); | |
420 | syserr(_("unable to execute %s (%s)"), prog, prog); | |
421 | } | |
422 | while ((dead_pid = waitpid(pid, &status, 0)) == -1 && errno == EINTR) ; | |
423 | if (dead_pid != pid) | |
424 | error(_("wait for subprocess %s failed"), prog); | |
425 | ||
426 | return status; | |
427 | } | |
428 | ||
429 | static bool | |
430 | rename_mv(const char *src, const char *dst) | |
431 | { | |
432 | const char *args[] = { "mv", src, dst, NULL }; | |
433 | int rc; | |
434 | ||
435 | if (rename(src, dst) == 0) | |
436 | return true; | |
437 | if (errno == ENOENT) | |
438 | return false; | |
439 | ||
440 | rc = spawn("mv", args); | |
441 | if (WIFEXITED(rc) && WEXITSTATUS(rc) == 0) | |
442 | return true; | |
443 | ||
444 | return false; | |
445 | } | |
446 | ||
447 | static void | |
448 | checked_symlink(const char *filename, const char *linkname) | |
449 | { | |
450 | if (symlink(filename, linkname)) | |
451 | syserr(_("error creating symbolic link '%.255s'"), linkname); | |
452 | } | |
453 | ||
454 | static void | |
455 | checked_mv(const char *src, const char *dst) | |
456 | { | |
457 | if (!rename_mv(src, dst)) | |
458 | syserr(_("unable to install '%.250s' as '%.250s'"), src, dst); | |
459 | } | |
460 | ||
461 | static void | |
462 | checked_rm(const char *f) | |
463 | { | |
464 | if (!unlink(f)) | |
465 | return; | |
466 | ||
467 | if (errno != ENOENT) | |
468 | syserr(_("unable to remove '%s'"), f); | |
469 | } | |
470 | ||
471 | static void DPKG_ATTR_PRINTF(1) | |
472 | checked_rm_args(const char *fmt, ...) | |
473 | { | |
474 | va_list args; | |
475 | char *path; | |
476 | ||
477 | va_start(args, fmt); | |
478 | path = xvasprintf(fmt, args); | |
479 | va_end(args); | |
480 | ||
481 | checked_rm(path); | |
482 | free(path); | |
483 | } | |
484 | ||
485 | /* | |
486 | * OBJECTS | |
487 | */ | |
488 | ||
489 | struct fileset { | |
490 | struct fileset *next; | |
491 | ||
492 | char *master_file; | |
493 | int priority; | |
494 | ||
495 | struct slave_file { | |
496 | struct slave_file *next; | |
497 | char *name; | |
498 | char *file; | |
499 | } *slaves; | |
500 | }; | |
501 | ||
502 | static struct fileset * | |
503 | fileset_new(const char *master_file, int prio) | |
504 | { | |
505 | struct fileset *fs; | |
506 | ||
507 | fs = xmalloc(sizeof(*fs)); | |
508 | fs->next = NULL; | |
509 | fs->master_file = xstrdup(master_file); | |
510 | fs->priority = prio; | |
511 | fs->slaves = NULL; | |
512 | ||
513 | return fs; | |
514 | } | |
515 | ||
516 | static void | |
517 | fileset_free(struct fileset *fs) | |
518 | { | |
519 | struct slave_file *slave, *next; | |
520 | ||
521 | free(fs->master_file); | |
522 | for (slave = fs->slaves; slave; slave = next) { | |
523 | next = slave->next; | |
524 | free(slave->name); | |
525 | free(slave->file); | |
526 | free(slave); | |
527 | } | |
528 | free(fs); | |
529 | } | |
530 | ||
531 | static void | |
532 | fileset_add_slave(struct fileset *fs, const char *name, const char *file) | |
533 | { | |
534 | struct slave_file *sl, *cur, *prev = NULL; | |
535 | ||
536 | /* Replace existing first */ | |
537 | for (cur = fs->slaves; cur; cur = cur->next) { | |
538 | if (strcmp(cur->name, name) == 0) { | |
539 | free(cur->file); | |
540 | cur->file = xstrdup(file); | |
541 | return; | |
542 | } | |
543 | prev = cur; | |
544 | } | |
545 | ||
546 | /* Otherwise add new at the end */ | |
547 | sl = xmalloc(sizeof(*sl)); | |
548 | sl->next = NULL; | |
549 | sl->name = xstrdup(name); | |
550 | sl->file = xstrdup(file); | |
551 | if (prev) | |
552 | prev->next = sl; | |
553 | else | |
554 | fs->slaves = sl; | |
555 | } | |
556 | ||
557 | static const char * | |
558 | fileset_get_slave(struct fileset *fs, const char *name) | |
559 | { | |
560 | struct slave_file *slave; | |
561 | ||
562 | for (slave = fs->slaves; slave; slave = slave->next) { | |
563 | if (strcmp(slave->name, name) == 0) | |
564 | return slave->file; | |
565 | } | |
566 | ||
567 | return NULL; | |
568 | } | |
569 | ||
570 | static bool | |
571 | fileset_has_slave(struct fileset *fs, const char *name) | |
572 | { | |
573 | const char *file = fileset_get_slave(fs, name); | |
574 | ||
575 | if (file == NULL) | |
576 | return false; | |
577 | ||
578 | return file[0] != '\0'; | |
579 | } | |
580 | ||
581 | static bool | |
582 | fileset_can_install_slave(struct fileset *fs, const char *slave_name) | |
583 | { | |
584 | /* Decide whether the slave alternative must be setup */ | |
585 | if (fileset_has_slave(fs, slave_name)) { | |
586 | const char *slave = fileset_get_slave(fs, slave_name); | |
587 | ||
588 | if (!pathname_is_missing(slave)) | |
589 | return true; | |
590 | } | |
591 | ||
592 | return false; | |
593 | } | |
594 | ||
595 | struct slave_link { | |
596 | struct slave_link *next; | |
597 | char *name; | |
598 | char *link; | |
599 | bool updated; | |
600 | }; | |
601 | ||
602 | struct commit_operation { | |
603 | struct commit_operation *next; | |
604 | ||
605 | enum opcode { | |
606 | OPCODE_NOP, | |
607 | OPCODE_RM, | |
608 | OPCODE_MV, | |
609 | } opcode; | |
610 | ||
611 | char *arg_a; | |
612 | char *arg_b; | |
613 | }; | |
614 | ||
615 | enum alternative_update_reason { | |
616 | ALT_UPDATE_NO, | |
617 | ALT_UPDATE_SLAVE_CHANGED, | |
618 | ALT_UPDATE_LINK_BROKEN, | |
619 | }; | |
620 | ||
621 | struct alternative { | |
622 | char *master_name; | |
623 | char *master_link; | |
624 | char *current; | |
625 | ||
626 | enum alternative_status { | |
627 | ALT_ST_UNKNOWN, | |
628 | ALT_ST_AUTO, | |
629 | ALT_ST_MANUAL, | |
630 | } status; | |
631 | ||
632 | struct slave_link *slaves; | |
633 | struct fileset *choices; | |
634 | ||
635 | struct commit_operation *commit_ops; | |
636 | ||
637 | int ref_count; | |
638 | bool modified; | |
639 | bool known_current; | |
640 | }; | |
641 | ||
642 | static void | |
643 | slave_link_free(struct slave_link *slave) | |
644 | { | |
645 | free(slave->name); | |
646 | free(slave->link); | |
647 | free(slave); | |
648 | } | |
649 | ||
650 | static void | |
651 | commit_operation_free(struct commit_operation *commit_op) | |
652 | { | |
653 | free(commit_op->arg_a); | |
654 | free(commit_op->arg_b); | |
655 | free(commit_op); | |
656 | } | |
657 | ||
658 | static struct alternative * | |
659 | alternative_new(const char *name) | |
660 | { | |
661 | struct alternative *alt; | |
662 | ||
663 | alt = xmalloc(sizeof(*alt)); | |
664 | alt->master_name = xstrdup(name); | |
665 | alt->master_link = NULL; | |
666 | alt->current = NULL; | |
667 | alt->status = ALT_ST_UNKNOWN; | |
668 | alt->slaves = NULL; | |
669 | alt->choices = NULL; | |
670 | alt->commit_ops = NULL; | |
671 | alt->modified = false; | |
672 | alt->known_current = false; | |
673 | alt->ref_count = 1; | |
674 | ||
675 | return alt; | |
676 | } | |
677 | ||
678 | static inline void | |
679 | alternative_ref(struct alternative *a) | |
680 | { | |
681 | a->ref_count++; | |
682 | } | |
683 | ||
684 | static inline bool | |
685 | alternative_unref(struct alternative *a) | |
686 | { | |
687 | return --a->ref_count == 0; | |
688 | } | |
689 | ||
690 | static void | |
691 | alternative_choices_free(struct alternative *a) | |
692 | { | |
693 | struct fileset *fs; | |
694 | ||
695 | if (a->choices) | |
696 | a->modified = true; | |
697 | ||
698 | while (a->choices) { | |
699 | fs = a->choices; | |
700 | a->choices = fs->next; | |
701 | fileset_free(fs); | |
702 | } | |
703 | } | |
704 | ||
705 | static void | |
706 | alternative_commit_operations_free(struct alternative *a) | |
707 | { | |
708 | struct commit_operation *op; | |
709 | ||
710 | while (a->commit_ops) { | |
711 | op = a->commit_ops; | |
712 | a->commit_ops = op->next; | |
713 | commit_operation_free(op); | |
714 | } | |
715 | } | |
716 | ||
717 | static void | |
718 | alternative_reset(struct alternative *alt) | |
719 | { | |
720 | struct slave_link *slave; | |
721 | ||
722 | free(alt->current); | |
723 | alt->current = NULL; | |
724 | free(alt->master_link); | |
725 | alt->master_link = NULL; | |
726 | while (alt->slaves) { | |
727 | slave = alt->slaves; | |
728 | alt->slaves = slave->next; | |
729 | slave_link_free(slave); | |
730 | } | |
731 | alternative_choices_free(alt); | |
732 | alternative_commit_operations_free(alt); | |
733 | alt->modified = false; | |
734 | alt->known_current = false; | |
735 | } | |
736 | ||
737 | static void | |
738 | alternative_free(struct alternative *alt) | |
739 | { | |
740 | if (!alternative_unref(alt)) | |
741 | return; | |
742 | ||
743 | alternative_reset(alt); | |
744 | free(alt->master_name); | |
745 | free(alt); | |
746 | } | |
747 | ||
748 | static int | |
749 | alternative_choices_count(struct alternative *alt) | |
750 | { | |
751 | struct fileset *fs; | |
752 | int count = 0; | |
753 | ||
754 | for (fs = alt->choices; fs; fs = fs->next) | |
755 | count++; | |
756 | ||
757 | return count; | |
758 | } | |
759 | ||
760 | static int | |
761 | alternative_slaves_count(struct alternative *alt) | |
762 | { | |
763 | struct slave_link *sl; | |
764 | int count = 0; | |
765 | ||
766 | for (sl = alt->slaves; sl; sl = sl->next) | |
767 | count++; | |
768 | ||
769 | return count; | |
770 | } | |
771 | ||
772 | static int | |
773 | compare_fileset(const void *va, const void *vb) | |
774 | { | |
775 | const struct fileset *a = *(const struct fileset **)va; | |
776 | const struct fileset *b = *(const struct fileset **)vb; | |
777 | ||
778 | assert(a && a->master_file); | |
779 | assert(b && b->master_file); | |
780 | ||
781 | return strcmp(a->master_file, b->master_file); | |
782 | } | |
783 | ||
784 | static int | |
785 | compare_slave_link(const void *va, const void *vb) | |
786 | { | |
787 | const struct slave_link *a = *(const struct slave_link **)va; | |
788 | const struct slave_link *b = *(const struct slave_link **)vb; | |
789 | ||
790 | assert(a && a->name); | |
791 | assert(b && b->name); | |
792 | ||
793 | return strcmp(a->name, b->name); | |
794 | } | |
795 | ||
796 | static void | |
797 | alternative_sort_choices(struct alternative *a) | |
798 | { | |
799 | int count, i; | |
800 | struct fileset **table, *fs; | |
801 | ||
802 | count = alternative_choices_count(a); | |
803 | if (count < 2) /* Nothing to sort */ | |
804 | return; | |
805 | ||
806 | /* Store objects in a table instead of a linked list */ | |
807 | table = xmalloc(sizeof(fs) * count); | |
808 | for (fs = a->choices, i = 0; fs; fs = fs->next) { | |
809 | assert(fs->master_file); | |
810 | table[i++] = fs; | |
811 | } | |
812 | ||
813 | qsort(table, count, sizeof(fs), compare_fileset); | |
814 | ||
815 | /* Rewrite the linked list from the sorted table */ | |
816 | a->choices = fs = table[0]; | |
817 | table[count - 1]->next = NULL; | |
818 | for (i = 1; i < count; fs = fs->next, i++) | |
819 | fs->next = table[i]; | |
820 | free(table); | |
821 | } | |
822 | ||
823 | static void | |
824 | alternative_sort_slaves(struct alternative *a) | |
825 | { | |
826 | int count, i; | |
827 | struct slave_link **table, *sl; | |
828 | ||
829 | count = alternative_slaves_count(a); | |
830 | if (count < 2) /* Nothing to sort */ | |
831 | return; | |
832 | ||
833 | /* Store objects in a table instead of a linked list */ | |
834 | table = xmalloc(sizeof(sl) * count); | |
835 | for (sl = a->slaves, i = 0; sl; sl = sl->next, i++) { | |
836 | table[i] = sl; | |
837 | } | |
838 | ||
839 | qsort(table, count, sizeof(sl), compare_slave_link); | |
840 | ||
841 | /* Rewrite the linked list from the sorted table */ | |
842 | a->slaves = sl = table[0]; | |
843 | table[count - 1]->next = NULL; | |
844 | for (i = 1; i < count; sl = sl->next, i++) | |
845 | sl->next = table[i]; | |
846 | free(table); | |
847 | } | |
848 | ||
849 | static struct fileset * | |
850 | alternative_get_fileset(struct alternative *a, const char *file) | |
851 | { | |
852 | struct fileset *fs; | |
853 | ||
854 | for (fs = a->choices; fs; fs = fs->next) | |
855 | if (strcmp(fs->master_file, file) == 0) | |
856 | return fs; | |
857 | ||
858 | return NULL; | |
859 | } | |
860 | ||
861 | static struct slave_link * | |
862 | alternative_get_slave(struct alternative *a, const char *name) | |
863 | { | |
864 | struct slave_link *sl; | |
865 | ||
866 | for (sl = a->slaves; sl; sl = sl->next) | |
867 | if (strcmp(sl->name, name) == 0) | |
868 | return sl; | |
869 | ||
870 | return NULL; | |
871 | } | |
872 | ||
873 | static bool | |
874 | alternative_has_slave(struct alternative *a, const char *name) | |
875 | { | |
876 | return alternative_get_slave(a, name) != NULL; | |
877 | } | |
878 | ||
879 | static bool | |
880 | alternative_has_choice(struct alternative *a, const char *file) | |
881 | { | |
882 | return alternative_get_fileset(a, file) != NULL; | |
883 | } | |
884 | ||
885 | static void | |
886 | alternative_add_choice(struct alternative *a, struct fileset *fs) | |
887 | { | |
888 | struct fileset *cur, *prev = NULL; | |
889 | ||
890 | /* Replace if already existing */ | |
891 | for (cur = a->choices; cur; cur = cur->next) { | |
892 | if (strcmp(cur->master_file, fs->master_file) == 0) { | |
893 | fs->next = cur->next; | |
894 | fileset_free(cur); | |
895 | if (prev) | |
896 | prev->next = fs; | |
897 | else | |
898 | a->choices = fs; | |
899 | ||
900 | /* XXX: Be smarter in detecting change? */ | |
901 | a->modified = true; | |
902 | return; | |
903 | } | |
904 | prev = cur; | |
905 | } | |
906 | ||
907 | /* Otherwise add at the end */ | |
908 | if (prev == NULL) | |
909 | a->choices = fs; | |
910 | else | |
911 | prev->next = fs; | |
912 | fs->next = NULL; | |
913 | a->modified = true; | |
914 | } | |
915 | ||
916 | static struct slave_link * | |
917 | alternative_add_slave(struct alternative *a, | |
918 | const char *slave_name, const char *slave_link) | |
919 | { | |
920 | struct slave_link *sl, *new; | |
921 | ||
922 | /* Replace if already existing */ | |
923 | for (sl = a->slaves; sl; sl = sl->next) { | |
924 | if (strcmp(sl->name, slave_name) == 0) { | |
925 | free(sl->link); | |
926 | sl->link = xstrdup(slave_link); | |
927 | return sl; | |
928 | } | |
929 | if (sl->next == NULL) | |
930 | break; | |
931 | } | |
932 | ||
933 | /* Otherwise create new and add at the end */ | |
934 | new = xmalloc(sizeof(*new)); | |
935 | new->name = xstrdup(slave_name); | |
936 | new->link = xstrdup(slave_link); | |
937 | new->updated = false; | |
938 | new->next = NULL; | |
939 | if (sl) | |
940 | sl->next = new; | |
941 | else | |
942 | a->slaves = new; | |
943 | ||
944 | return new; | |
945 | } | |
946 | ||
947 | static void | |
948 | alternative_copy_slave(struct alternative *a, struct slave_link *sl) | |
949 | { | |
950 | struct slave_link *sl_new; | |
951 | ||
952 | sl_new = alternative_add_slave(a, sl->name, sl->link); | |
953 | sl_new->updated = sl->updated; | |
954 | } | |
955 | ||
956 | static const char * | |
957 | alternative_status_string(enum alternative_status status) | |
958 | { | |
959 | return (status == ALT_ST_AUTO) ? "auto" : "manual"; | |
960 | } | |
961 | ||
962 | static const char * | |
963 | alternative_status_describe(enum alternative_status status) | |
964 | { | |
965 | return (status == ALT_ST_AUTO) ? _("auto mode") : _("manual mode"); | |
966 | } | |
967 | ||
968 | static void | |
969 | alternative_set_status(struct alternative *a, enum alternative_status status) | |
970 | { | |
971 | if (a->status == ALT_ST_UNKNOWN || status != a->status) | |
972 | a->modified = true; | |
973 | ||
974 | if (a->status != ALT_ST_UNKNOWN && status != a->status) | |
975 | log_msg("status of link group %s set to %s", a->master_link, | |
976 | alternative_status_string(status)); | |
977 | ||
978 | a->status = status; | |
979 | } | |
980 | ||
981 | static void | |
982 | alternative_set_link(struct alternative *a, const char *linkname) | |
983 | { | |
984 | if (a->master_link == NULL || strcmp(linkname, a->master_link) != 0) | |
985 | a->modified = true; | |
986 | ||
987 | free(a->master_link); | |
988 | a->master_link = xstrdup(linkname); | |
989 | } | |
990 | ||
991 | static bool | |
992 | alternative_remove_choice(struct alternative *a, const char *file) | |
993 | { | |
994 | struct fileset *fs, *fs_prev; | |
995 | ||
996 | fs_prev = NULL; | |
997 | for (fs = a->choices; fs; fs = fs->next) { | |
998 | if (strcmp(fs->master_file, file) != 0) { | |
999 | fs_prev = fs; | |
1000 | continue; | |
1001 | } | |
1002 | if (fs_prev) | |
1003 | fs_prev->next = fs->next; | |
1004 | else | |
1005 | a->choices = fs->next; | |
1006 | fileset_free(fs); | |
1007 | a->modified = true; | |
1008 | return true; | |
1009 | } | |
1010 | ||
1011 | return false; | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Alternatives Database Load/Store functions. | |
1016 | */ | |
1017 | ||
1018 | enum altdb_flags { | |
1019 | ALTDB_LAX_PARSER = 1 << 0, | |
1020 | ALTDB_WARN_PARSER = 1 << 1, | |
1021 | }; | |
1022 | ||
1023 | struct altdb_context { | |
1024 | FILE *fh; | |
1025 | char *filename; | |
1026 | enum altdb_flags flags; | |
1027 | bool modified; | |
1028 | void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(2) | |
1029 | (*bad_format)(struct altdb_context *, const char *format, ...); | |
1030 | jmp_buf on_error; | |
1031 | }; | |
1032 | ||
1033 | static int | |
1034 | altdb_filter_namelist(const struct dirent *entry) | |
1035 | { | |
1036 | if (strcmp(entry->d_name, ".") == 0 || | |
1037 | strcmp(entry->d_name, "..") == 0 || | |
1038 | (strlen(entry->d_name) > strlen(ALT_TMP_EXT) && | |
1039 | strcmp(entry->d_name + strlen(entry->d_name) - | |
1040 | strlen(ALT_TMP_EXT), ALT_TMP_EXT) == 0)) | |
1041 | return 0; | |
1042 | return 1; | |
1043 | } | |
1044 | ||
1045 | static int | |
1046 | altdb_get_namelist(struct dirent ***table) | |
1047 | { | |
1048 | int count; | |
1049 | ||
1050 | count = scandir(admdir, table, altdb_filter_namelist, alphasort); | |
1051 | if (count < 0) | |
1052 | syserr(_("cannot scan directory '%.255s'"), admdir); | |
1053 | ||
1054 | return count; | |
1055 | } | |
1056 | ||
1057 | static void | |
1058 | altdb_free_namelist(struct dirent **table, int n) | |
1059 | { | |
1060 | while (n--) | |
1061 | free(table[n]); | |
1062 | free(table); | |
1063 | } | |
1064 | ||
1065 | static char * | |
1066 | altdb_get_line(struct altdb_context *ctx, const char *name) | |
1067 | { | |
1068 | char *buf, *line; | |
1069 | size_t len, bufsz, i; | |
1070 | ||
1071 | bufsz = 1024; | |
1072 | buf = xmalloc(bufsz); | |
1073 | ||
1074 | for (i = 0; true; i += strlen(line)) { | |
1075 | errno = 0; | |
1076 | line = fgets(buf + i, bufsz - i, ctx->fh); | |
1077 | if (line) { | |
1078 | if (strlen(buf) < bufsz - 1 || buf[bufsz - 2] == '\n') | |
1079 | break; | |
1080 | /* Need more space */ | |
1081 | bufsz *= 2; | |
1082 | buf = realloc(buf, bufsz); | |
1083 | if (!buf) | |
1084 | error(_("failed to allocate memory")); | |
1085 | continue; | |
1086 | } | |
1087 | if (feof(ctx->fh)) | |
1088 | ctx->bad_format(ctx, _("unexpected end of file while trying " | |
1089 | "to read %s"), name); | |
1090 | ctx->bad_format(ctx, _("while reading %s: %s"), | |
1091 | name, strerror(errno)); | |
1092 | } | |
1093 | ||
1094 | len = strlen(buf); | |
1095 | if (len == 0 || buf[len - 1] != '\n') { | |
1096 | ctx->bad_format(ctx, _("line not terminated while trying " | |
1097 | "to read %s"), name); | |
1098 | } | |
1099 | line[len - 1] = '\0'; | |
1100 | ||
1101 | return buf; | |
1102 | } | |
1103 | ||
1104 | static void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(2) | |
1105 | altdb_parse_error(struct altdb_context *ctx, const char *format, ...) | |
1106 | { | |
1107 | char *msg; | |
1108 | va_list args; | |
1109 | ||
1110 | va_start(args, format); | |
1111 | msg = xvasprintf(format, args); | |
1112 | va_end(args); | |
1113 | ||
1114 | error(_("%s corrupt: %s"), ctx->filename, msg); | |
1115 | } | |
1116 | ||
1117 | static void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(2) | |
1118 | altdb_parse_stop(struct altdb_context *ctx, const char *format, ...) | |
1119 | { | |
1120 | longjmp(ctx->on_error, 1); | |
1121 | } | |
1122 | ||
1123 | static void | |
1124 | altdb_print_line(struct altdb_context *ctx, const char *line) | |
1125 | { | |
1126 | if (strchr(line, '\n') != NULL) | |
1127 | error(_("newlines prohibited in update-alternatives files (%s)"), | |
1128 | line); | |
1129 | ||
1130 | if (fprintf(ctx->fh, "%s\n", line) < (int) strlen(line) + 1) | |
1131 | syserr(_("unable to write file '%s'"), ctx->filename); | |
1132 | } | |
1133 | ||
1134 | static bool | |
1135 | alternative_parse_slave(struct alternative *a, struct altdb_context *ctx) | |
1136 | { | |
1137 | char *name, *linkname; | |
1138 | struct slave_link *sl; | |
1139 | ||
1140 | name = altdb_get_line(ctx, _("slave name")); | |
1141 | if (!strlen(name)) { /* End of list */ | |
1142 | free(name); | |
1143 | return false; | |
1144 | } | |
1145 | sl = alternative_get_slave(a, name); | |
1146 | if (sl) { | |
1147 | free(name); | |
1148 | ctx->bad_format(ctx, _("duplicate slave name %s"), sl->name); | |
1149 | } | |
1150 | ||
1151 | linkname = altdb_get_line(ctx, _("slave link")); | |
1152 | if (strcmp(linkname, a->master_link) == 0) { | |
1153 | free(linkname); | |
1154 | free(name); | |
1155 | ctx->bad_format(ctx, _("slave link same as main link %s"), | |
1156 | a->master_link); | |
1157 | } | |
1158 | for (sl = a->slaves; sl; sl = sl->next) { | |
1159 | if (strcmp(linkname, sl->link) == 0) { | |
1160 | free(linkname); | |
1161 | free(name); | |
1162 | ctx->bad_format(ctx, _("duplicate slave link %s"), | |
1163 | sl->link); | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | alternative_add_slave(a, name, linkname); | |
1168 | free(linkname); | |
1169 | free(name); | |
1170 | ||
1171 | return true; | |
1172 | } | |
1173 | ||
1174 | static bool | |
1175 | alternative_parse_fileset(struct alternative *a, struct altdb_context *ctx) | |
1176 | { | |
1177 | struct fileset *fs; | |
1178 | struct slave_link *sl; | |
1179 | char *master_file; | |
1180 | ||
1181 | master_file = altdb_get_line(ctx, _("master file")); | |
1182 | if (!strlen(master_file)) { /* End of list */ | |
1183 | free(master_file); | |
1184 | return false; | |
1185 | } | |
1186 | ||
1187 | fs = alternative_get_fileset(a, master_file); | |
1188 | if (fs) | |
1189 | ctx->bad_format(ctx, _("duplicate path %s"), master_file); | |
1190 | ||
1191 | if (pathname_is_missing(master_file)) { | |
1192 | char *junk; | |
1193 | ||
1194 | /* File not found - remove. */ | |
1195 | if (ctx->flags & ALTDB_WARN_PARSER) | |
1196 | warning(_("alternative %s (part of link group %s) " | |
1197 | "doesn't exist; removing from list of " | |
1198 | "alternatives"), master_file, a->master_name); | |
1199 | junk = altdb_get_line(ctx, _("priority")); | |
1200 | free(junk); | |
1201 | for (sl = a->slaves; sl; sl = sl->next) { | |
1202 | junk = altdb_get_line(ctx, _("slave file")); | |
1203 | free(junk); | |
1204 | } | |
1205 | ctx->modified = true; | |
1206 | } else { | |
1207 | char *prio_str, *prio_end; | |
1208 | long prio; | |
1209 | ||
1210 | prio_str = altdb_get_line(ctx, _("priority")); | |
1211 | errno = 0; | |
1212 | prio = strtol(prio_str, &prio_end, 10); | |
1213 | /* XXX: Leak master_file/prio_str on non-fatal error */ | |
1214 | if (prio_str == prio_end || *prio_end != '\0') | |
1215 | ctx->bad_format(ctx, _("priority of %s: %s"), | |
1216 | master_file, prio_str); | |
1217 | if (prio < INT_MIN || prio > INT_MAX || errno == ERANGE) | |
1218 | ctx->bad_format(ctx, | |
1219 | _("priority of %s is out of range: %s"), | |
1220 | master_file, prio_str); | |
1221 | free(prio_str); | |
1222 | ||
1223 | fs = fileset_new(master_file, prio); | |
1224 | for (sl = a->slaves; sl; sl = sl->next) { | |
1225 | char *slave_file = altdb_get_line(ctx, _("slave file")); | |
1226 | fileset_add_slave(fs, sl->name, slave_file); | |
1227 | free(slave_file); | |
1228 | } | |
1229 | alternative_add_choice(a, fs); | |
1230 | } | |
1231 | free(master_file); | |
1232 | ||
1233 | return true; | |
1234 | } | |
1235 | ||
1236 | static bool | |
1237 | alternative_load(struct alternative *a, enum altdb_flags flags) | |
1238 | { | |
1239 | struct altdb_context ctx; | |
1240 | struct stat st; | |
1241 | char *status; | |
1242 | char *master_link; | |
1243 | ||
1244 | /* Initialize parse context */ | |
1245 | if (setjmp(ctx.on_error)) { | |
1246 | if (ctx.fh) | |
1247 | fclose(ctx.fh); | |
1248 | free(ctx.filename); | |
1249 | alternative_reset(a); | |
1250 | return false; | |
1251 | } | |
1252 | ctx.modified = false; | |
1253 | ctx.flags = flags; | |
1254 | if (flags & ALTDB_LAX_PARSER) | |
1255 | ctx.bad_format = altdb_parse_stop; | |
1256 | else | |
1257 | ctx.bad_format = altdb_parse_error; | |
1258 | ctx.filename = xasprintf("%s/%s", admdir, a->master_name); | |
1259 | ||
1260 | /* Open the alternative file. */ | |
1261 | ctx.fh = fopen(ctx.filename, "r"); | |
1262 | if (ctx.fh == NULL) { | |
1263 | if (errno == ENOENT) | |
1264 | return false; | |
1265 | ||
1266 | syserr(_("unable to open file '%s'"), ctx.filename); | |
1267 | } | |
1268 | ||
1269 | /* Verify the alternative is not empty. */ | |
1270 | if (fstat(fileno(ctx.fh), &st) == -1) | |
1271 | syserr(_("cannot stat file '%s'"), ctx.filename); | |
1272 | if (st.st_size == 0) | |
1273 | return false; | |
1274 | ||
1275 | /* Start parsing mandatory attributes (link+status) of the alternative */ | |
1276 | alternative_reset(a); | |
1277 | status = altdb_get_line(&ctx, _("status")); | |
1278 | if (strcmp(status, "auto") != 0 && strcmp(status, "manual") != 0) | |
1279 | ctx.bad_format(&ctx, _("invalid status")); | |
1280 | alternative_set_status(a, (strcmp(status, "auto") == 0) ? | |
1281 | ALT_ST_AUTO : ALT_ST_MANUAL); | |
1282 | free(status); | |
1283 | ||
1284 | master_link = altdb_get_line(&ctx, _("master link")); | |
1285 | alternative_set_link(a, master_link); | |
1286 | free(master_link); | |
1287 | ||
1288 | /* Parse the description of the slaves links of the alternative */ | |
1289 | while (alternative_parse_slave(a, &ctx)); | |
1290 | ||
1291 | /* Parse the available choices in the alternative */ | |
1292 | while (alternative_parse_fileset(a, &ctx)) ; | |
1293 | ||
1294 | /* Close database file */ | |
1295 | if (fclose(ctx.fh)) | |
1296 | syserr(_("unable to close file '%s'"), ctx.filename); | |
1297 | free(ctx.filename); | |
1298 | ||
1299 | /* Initialize the modified field which has been erroneously changed | |
1300 | * by the various alternative_(add|set)_* calls: | |
1301 | * false unless a choice has been auto-cleaned */ | |
1302 | a->modified = ctx.modified; | |
1303 | ||
1304 | return true; | |
1305 | } | |
1306 | ||
1307 | static void | |
1308 | alternative_save(struct alternative *a) | |
1309 | { | |
1310 | struct altdb_context ctx; | |
1311 | struct slave_link *sl, *sl_prev; | |
1312 | struct fileset *fs; | |
1313 | char *filenew, *file; | |
1314 | ||
1315 | /* Cleanup unused slaves before writing admin file. */ | |
1316 | sl_prev = NULL; | |
1317 | for (sl = a->slaves; sl; sl_prev = sl, sl = sl->next) { | |
1318 | bool has_slave = false; | |
1319 | ||
1320 | for (fs = a->choices; fs; fs = fs->next) { | |
1321 | if (fileset_has_slave(fs, sl->name)) { | |
1322 | has_slave = true; | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | if (!has_slave) { | |
1328 | struct slave_link *sl_rm; | |
1329 | ||
1330 | verbose(_("discarding obsolete slave link %s (%s)"), | |
1331 | sl->name, sl->link); | |
1332 | if (sl_prev) | |
1333 | sl_prev->next = sl->next; | |
1334 | else | |
1335 | a->slaves = sl->next; | |
1336 | sl_rm = sl; | |
1337 | sl = sl_prev ? sl_prev : a->slaves; | |
1338 | slave_link_free(sl_rm); | |
1339 | if (!sl) | |
1340 | break; /* No other slave left. */ | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | /* Sort entries */ | |
1345 | alternative_sort_slaves(a); | |
1346 | alternative_sort_choices(a); | |
1347 | ||
1348 | /* Write admin file. */ | |
1349 | file = xasprintf("%s/%s", admdir, a->master_name); | |
1350 | filenew = xasprintf("%s" ALT_TMP_EXT, file); | |
1351 | ||
1352 | ctx.filename = filenew; | |
1353 | ctx.fh = fopen(ctx.filename, "w"); | |
1354 | if (ctx.fh == NULL) | |
1355 | syserr(_("unable to create file '%s'"), ctx.filename); | |
1356 | ||
1357 | altdb_print_line(&ctx, alternative_status_string(a->status)); | |
1358 | altdb_print_line(&ctx, a->master_link); | |
1359 | for (sl = a->slaves; sl; sl = sl->next) { | |
1360 | altdb_print_line(&ctx, sl->name); | |
1361 | altdb_print_line(&ctx, sl->link); | |
1362 | } | |
1363 | altdb_print_line(&ctx, ""); | |
1364 | ||
1365 | for (fs = a->choices; fs; fs = fs->next) { | |
1366 | char *prio; | |
1367 | ||
1368 | altdb_print_line(&ctx, fs->master_file); | |
1369 | ||
1370 | prio = xasprintf("%d", fs->priority); | |
1371 | altdb_print_line(&ctx, prio); | |
1372 | free(prio); | |
1373 | ||
1374 | for (sl = a->slaves; sl; sl = sl->next) { | |
1375 | if (fileset_has_slave(fs, sl->name)) | |
1376 | altdb_print_line(&ctx, | |
1377 | fileset_get_slave(fs, sl->name)); | |
1378 | else | |
1379 | altdb_print_line(&ctx, ""); | |
1380 | } | |
1381 | } | |
1382 | altdb_print_line(&ctx, ""); | |
1383 | ||
1384 | /* Close database file */ | |
1385 | if (fflush(ctx.fh)) | |
1386 | syserr(_("unable to flush file '%s'"), ctx.filename); | |
1387 | if (fsync(fileno(ctx.fh))) | |
1388 | syserr(_("unable to sync file '%s'"), ctx.filename); | |
1389 | if (fclose(ctx.fh)) | |
1390 | syserr(_("unable to close file '%s'"), ctx.filename); | |
1391 | ||
1392 | /* Put in place atomically. */ | |
1393 | checked_mv(filenew, file); | |
1394 | ||
1395 | free(filenew); | |
1396 | free(file); | |
1397 | } | |
1398 | ||
1399 | static const char * | |
1400 | alternative_set_current(struct alternative *a, char *new_choice) | |
1401 | { | |
1402 | a->known_current = true; | |
1403 | a->current = new_choice; | |
1404 | ||
1405 | return new_choice; | |
1406 | } | |
1407 | ||
1408 | static const char * | |
1409 | alternative_get_current(struct alternative *a) | |
1410 | { | |
1411 | char *curlink; | |
1412 | char *file; | |
1413 | ||
1414 | if (a->known_current) | |
1415 | return a->current; | |
1416 | ||
1417 | curlink = xasprintf("%s/%s", altdir, a->master_name); | |
1418 | file = areadlink(curlink); | |
1419 | if (file == NULL && errno != ENOENT) | |
1420 | syserr(_("cannot stat file '%s'"), curlink); | |
1421 | free(curlink); | |
1422 | ||
1423 | return alternative_set_current(a, file); | |
1424 | } | |
1425 | ||
1426 | static struct fileset * | |
1427 | alternative_get_best(struct alternative *a) | |
1428 | { | |
1429 | struct fileset *fs, *best; | |
1430 | const char *current; | |
1431 | ||
1432 | current = alternative_get_current(a); | |
1433 | if (current) | |
1434 | best = alternative_get_fileset(a, current); | |
1435 | else | |
1436 | best = NULL; | |
1437 | ||
1438 | if (best == NULL) | |
1439 | best = a->choices; | |
1440 | ||
1441 | for (fs = a->choices; fs; fs = fs->next) | |
1442 | if (fs->priority > best->priority) | |
1443 | best = fs; | |
1444 | ||
1445 | return best; | |
1446 | } | |
1447 | ||
1448 | static void | |
1449 | alternative_display_query(struct alternative *a) | |
1450 | { | |
1451 | struct fileset *best, *fs; | |
1452 | struct slave_link *sl; | |
1453 | const char *current; | |
1454 | ||
1455 | pr("Name: %s", a->master_name); | |
1456 | pr("Link: %s", a->master_link); | |
1457 | if (alternative_slaves_count(a) > 0) { | |
1458 | pr("Slaves:"); | |
1459 | for (sl = a->slaves; sl; sl = sl->next) | |
1460 | pr(" %s %s", sl->name, sl->link); | |
1461 | } | |
1462 | pr("Status: %s", alternative_status_string(a->status)); | |
1463 | best = alternative_get_best(a); | |
1464 | if (best) | |
1465 | pr("Best: %s", best->master_file); | |
1466 | current = alternative_get_current(a); | |
1467 | pr("Value: %s", current ? current : "none"); | |
1468 | ||
1469 | for (fs = a->choices; fs; fs = fs->next) { | |
1470 | printf("\n"); | |
1471 | pr("Alternative: %s", fs->master_file); | |
1472 | pr("Priority: %d", fs->priority); | |
1473 | if (alternative_slaves_count(a) == 0) | |
1474 | continue; | |
1475 | pr("Slaves:"); | |
1476 | for (sl = a->slaves; sl; sl = sl->next) { | |
1477 | if (fileset_has_slave(fs, sl->name)) | |
1478 | pr(" %s %s", sl->name, | |
1479 | fileset_get_slave(fs, sl->name)); | |
1480 | } | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | static void | |
1485 | alternative_display_user(struct alternative *a) | |
1486 | { | |
1487 | const char *current; | |
1488 | struct fileset *fs; | |
1489 | struct slave_link *sl; | |
1490 | ||
1491 | pr("%s - %s", a->master_name, alternative_status_describe(a->status)); | |
1492 | fs = alternative_get_best(a); | |
1493 | if (fs) | |
1494 | pr(_(" link best version is %s"), fs->master_file); | |
1495 | else | |
1496 | pr(_(" link best version not available")); | |
1497 | current = alternative_get_current(a); | |
1498 | if (current) { | |
1499 | pr(_(" link currently points to %s"), current); | |
1500 | } else { | |
1501 | pr(_(" link currently absent")); | |
1502 | } | |
1503 | pr(_(" link %s is %s"), a->master_name, a->master_link); | |
1504 | for (sl = a->slaves; sl; sl = sl->next) | |
1505 | pr(_(" slave %s is %s"), sl->name, sl->link); | |
1506 | ||
1507 | for (fs = a->choices; fs; fs = fs->next) { | |
1508 | pr(_("%s - priority %d"), fs->master_file, fs->priority); | |
1509 | for (sl = a->slaves; sl; sl = sl->next) { | |
1510 | if (fileset_has_slave(fs, sl->name)) | |
1511 | pr(_(" slave %s: %s"), sl->name, | |
1512 | fileset_get_slave(fs, sl->name)); | |
1513 | } | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | static void | |
1518 | alternative_display_list(struct alternative *a) | |
1519 | { | |
1520 | struct fileset *fs; | |
1521 | ||
1522 | for (fs = a->choices; fs; fs = fs->next) | |
1523 | pr("%s", fs->master_file); | |
1524 | } | |
1525 | ||
1526 | static void | |
1527 | alternative_print_choice(struct alternative *a, enum alternative_status status, | |
1528 | struct fileset *fs, int idx, int len) | |
1529 | { | |
1530 | const char *current = alternative_get_current(a); | |
1531 | int mark; | |
1532 | ||
1533 | if (a->status == status && | |
1534 | current && strcmp(current, fs->master_file) == 0) | |
1535 | mark = '*'; | |
1536 | else | |
1537 | mark = ' '; | |
1538 | ||
1539 | pr("%c %-12d %-*s % -10d %s", mark, idx, len, | |
1540 | fs->master_file, fs->priority, alternative_status_describe(status)); | |
1541 | } | |
1542 | ||
1543 | static char * | |
1544 | alternative_select_choice(struct alternative *a) | |
1545 | { | |
1546 | const char *current; | |
1547 | char *ret, selection[_POSIX_PATH_MAX]; | |
1548 | struct fileset *best, *fs; | |
1549 | int n_choices; | |
1550 | int len, idx; | |
1551 | ||
1552 | n_choices = alternative_choices_count(a); | |
1553 | current = alternative_get_current(a); | |
1554 | best = alternative_get_best(a); | |
1555 | assert(best); | |
1556 | ||
1557 | len = 15; | |
1558 | for (fs = a->choices; fs; fs = fs->next) | |
1559 | len = max(len, (int)strlen(fs->master_file) + 1); | |
1560 | ||
1561 | for (;;) { | |
1562 | pr(P_("There is %d choice for the alternative %s (providing %s).", | |
1563 | "There are %d choices for the alternative %s (providing %s).", | |
1564 | n_choices), n_choices, a->master_name, a->master_link); | |
1565 | printf("\n"); | |
1566 | ||
1567 | pr(" %-12.12s %-*.*s %-10.10s %s", _("Selection"), len, len, | |
1568 | _("Path"), _("Priority"), _("Status")); | |
1569 | pr("------------------------------------------------------------"); | |
1570 | idx = 0; | |
1571 | alternative_print_choice(a, ALT_ST_AUTO, best, idx++, len); | |
1572 | for (fs = a->choices; fs; fs = fs->next, idx++) | |
1573 | alternative_print_choice(a, ALT_ST_MANUAL, fs, idx, len); | |
1574 | printf("\n"); | |
1575 | printf(_("Press <enter> to keep the current choice[*], " | |
1576 | "or type selection number: ")); | |
1577 | ret = fgets(selection, sizeof(selection), stdin); | |
1578 | if (ret == NULL || strlen(selection) == 0) { | |
1579 | return NULL; | |
1580 | } | |
1581 | selection[strlen(selection) - 1] = '\0'; | |
1582 | if (strlen(selection) == 0) | |
1583 | return xstrdup(current); | |
1584 | errno = 0; | |
1585 | idx = strtol(selection, &ret, 10); | |
1586 | if (idx >= 0 && errno == 0 && *ret == '\0') { | |
1587 | /* Look up by index */ | |
1588 | if (idx == 0) { | |
1589 | alternative_set_status(a, ALT_ST_AUTO); | |
1590 | return xstrdup(best->master_file); | |
1591 | } | |
1592 | idx--; | |
1593 | for (fs = a->choices; idx && fs; idx--) | |
1594 | fs = fs->next; | |
1595 | if (fs) { | |
1596 | alternative_set_status(a, ALT_ST_MANUAL); | |
1597 | return xstrdup(fs->master_file); | |
1598 | } | |
1599 | } else { | |
1600 | /* Look up by name */ | |
1601 | fs = alternative_get_fileset(a, selection); | |
1602 | if (fs) { | |
1603 | alternative_set_status(a, ALT_ST_MANUAL); | |
1604 | return xstrdup(selection); | |
1605 | } | |
1606 | } | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | static char * | |
1611 | alternative_config(struct alternative *a, const char *current_choice) | |
1612 | { | |
1613 | char *new_choice = NULL; | |
1614 | ||
1615 | if (alternative_choices_count(a) == 0) { | |
1616 | pr(_("There is no program which provides %s."), | |
1617 | a->master_name); | |
1618 | pr(_("Nothing to configure.")); | |
1619 | } else if (opt_skip_auto && a->status == ALT_ST_AUTO) { | |
1620 | alternative_display_user(a); | |
1621 | } else if (alternative_choices_count(a) == 1 && | |
1622 | a->status == ALT_ST_AUTO && | |
1623 | current_choice != NULL) { | |
1624 | pr(_("There is only one alternative in link group %s (providing %s): %s"), | |
1625 | a->master_name, a->master_link, current_choice); | |
1626 | pr(_("Nothing to configure.")); | |
1627 | } else { | |
1628 | new_choice = alternative_select_choice(a); | |
1629 | } | |
1630 | ||
1631 | return new_choice; | |
1632 | } | |
1633 | ||
1634 | static void | |
1635 | alternative_add_commit_op(struct alternative *a, enum opcode opcode, | |
1636 | const char *arg_a, const char *arg_b) | |
1637 | { | |
1638 | struct commit_operation *op, *cur; | |
1639 | ||
1640 | op = xmalloc(sizeof(*op)); | |
1641 | op->opcode = opcode; | |
1642 | op->arg_a = xstrdup(arg_a); | |
1643 | op->arg_b = xstrdup(arg_b); | |
1644 | op->next = NULL; | |
1645 | ||
1646 | /* Add at the end */ | |
1647 | cur = a->commit_ops; | |
1648 | while (cur && cur->next) | |
1649 | cur = cur->next; | |
1650 | if (cur) | |
1651 | cur->next = op; | |
1652 | else | |
1653 | a->commit_ops = op; | |
1654 | } | |
1655 | ||
1656 | static void | |
1657 | alternative_commit(struct alternative *a) | |
1658 | { | |
1659 | struct commit_operation *op; | |
1660 | ||
1661 | for (op = a->commit_ops; op; op = op->next) { | |
1662 | switch (op->opcode) { | |
1663 | case OPCODE_NOP: | |
1664 | break; | |
1665 | case OPCODE_RM: | |
1666 | checked_rm(op->arg_a); | |
1667 | break; | |
1668 | case OPCODE_MV: | |
1669 | checked_mv(op->arg_a, op->arg_b); | |
1670 | break; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | alternative_commit_operations_free(a); | |
1675 | } | |
1676 | ||
1677 | enum alternative_path_status { | |
1678 | ALT_PATH_SYMLINK, | |
1679 | ALT_PATH_MISSING, | |
1680 | ALT_PATH_OTHER, | |
1681 | }; | |
1682 | ||
1683 | static enum alternative_path_status | |
1684 | alternative_path_classify(const char *linkname) | |
1685 | { | |
1686 | struct stat st; | |
1687 | ||
1688 | errno = 0; | |
1689 | if (lstat(linkname, &st) == -1) { | |
1690 | if (errno != ENOENT) | |
1691 | syserr(_("cannot stat file '%s'"), linkname); | |
1692 | return ALT_PATH_MISSING; | |
1693 | } else if (S_ISLNK(st.st_mode)) { | |
1694 | return ALT_PATH_SYMLINK; | |
1695 | } else { | |
1696 | return ALT_PATH_OTHER; | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | static bool | |
1701 | alternative_path_can_remove(const char *linkname) | |
1702 | { | |
1703 | if (opt_force) | |
1704 | return true; | |
1705 | ||
1706 | if (alternative_path_classify(linkname) == ALT_PATH_OTHER) | |
1707 | return false; | |
1708 | else | |
1709 | return true; | |
1710 | } | |
1711 | ||
1712 | static bool | |
1713 | alternative_path_needs_update(const char *linkname, const char *filename) | |
1714 | { | |
1715 | char *linktarget; | |
1716 | bool update; | |
1717 | ||
1718 | if (opt_force) | |
1719 | return true; | |
1720 | ||
1721 | switch (alternative_path_classify(linkname)) { | |
1722 | case ALT_PATH_SYMLINK: | |
1723 | linktarget = xreadlink(linkname); | |
1724 | if (strcmp(linktarget, filename) == 0) | |
1725 | update = false; | |
1726 | else | |
1727 | update = true; | |
1728 | free(linktarget); | |
1729 | ||
1730 | return update; | |
1731 | case ALT_PATH_OTHER: | |
1732 | warning(_("not replacing %s with a link"), linkname); | |
1733 | return false; | |
1734 | case ALT_PATH_MISSING: | |
1735 | default: | |
1736 | return true; | |
1737 | } | |
1738 | } | |
1739 | ||
1740 | static void | |
1741 | alternative_prepare_install_single(struct alternative *a, const char *name, | |
1742 | const char *linkname, const char *file) | |
1743 | { | |
1744 | char *fntmp, *fn; | |
1745 | ||
1746 | /* Create link in /etc/alternatives. */ | |
1747 | fntmp = xasprintf("%s/%s" ALT_TMP_EXT, altdir, name); | |
1748 | fn = xasprintf("%s/%s", altdir, name); | |
1749 | checked_rm(fntmp); | |
1750 | checked_symlink(file, fntmp); | |
1751 | alternative_add_commit_op(a, OPCODE_MV, fntmp, fn); | |
1752 | free(fntmp); | |
1753 | ||
1754 | if (alternative_path_needs_update(linkname, fn)) { | |
1755 | /* Create alternative link. */ | |
1756 | fntmp = xasprintf("%s" ALT_TMP_EXT, linkname); | |
1757 | checked_rm(fntmp); | |
1758 | checked_symlink(fn, fntmp); | |
1759 | alternative_add_commit_op(a, OPCODE_MV, fntmp, linkname); | |
1760 | free(fntmp); | |
1761 | } | |
1762 | free(fn); | |
1763 | } | |
1764 | ||
1765 | static void | |
1766 | alternative_prepare_install(struct alternative *a, const char *choice) | |
1767 | { | |
1768 | struct slave_link *sl; | |
1769 | struct fileset *fs; | |
1770 | ||
1771 | fs = alternative_get_fileset(a, choice); | |
1772 | if (fs == NULL) | |
1773 | error(_("can't install unknown choice %s"), choice); | |
1774 | ||
1775 | /* Take care of master alternative */ | |
1776 | alternative_prepare_install_single(a, a->master_name, a->master_link, | |
1777 | choice); | |
1778 | ||
1779 | /* Take care of slaves alternatives */ | |
1780 | for (sl = a->slaves; sl; sl = sl->next) { | |
1781 | char *fn; | |
1782 | ||
1783 | if (fileset_can_install_slave(fs, sl->name)) { | |
1784 | alternative_prepare_install_single(a, sl->name, | |
1785 | sl->link, fileset_get_slave(fs, sl->name)); | |
1786 | continue; | |
1787 | } | |
1788 | ||
1789 | /* Slave can't be installed */ | |
1790 | if (fileset_has_slave(fs, sl->name)) | |
1791 | warning(_("skip creation of %s because associated " | |
1792 | "file %s (of link group %s) doesn't exist"), | |
1793 | sl->link, fileset_get_slave(fs, sl->name), | |
1794 | a->master_name); | |
1795 | ||
1796 | /* Drop unused slave. */ | |
1797 | fn = xasprintf("%s/%s", altdir, sl->name); | |
1798 | if (alternative_path_can_remove(sl->link)) | |
1799 | alternative_add_commit_op(a, OPCODE_RM, sl->link, NULL); | |
1800 | else | |
1801 | warning(_("not removing %s since it's not a symlink"), | |
1802 | sl->link); | |
1803 | alternative_add_commit_op(a, OPCODE_RM, fn, NULL); | |
1804 | free(fn); | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | static void | |
1809 | alternative_remove_files(struct alternative *a) | |
1810 | { | |
1811 | struct slave_link *sl; | |
1812 | ||
1813 | checked_rm_args("%s" ALT_TMP_EXT, a->master_link); | |
1814 | if (alternative_path_can_remove(a->master_link)) | |
1815 | checked_rm(a->master_link); | |
1816 | ||
1817 | checked_rm_args("%s/%s" ALT_TMP_EXT, altdir, a->master_name); | |
1818 | checked_rm_args("%s/%s", altdir, a->master_name); | |
1819 | ||
1820 | for (sl = a->slaves; sl; sl = sl->next) { | |
1821 | checked_rm_args("%s" ALT_TMP_EXT, sl->link); | |
1822 | if (alternative_path_can_remove(sl->link)) | |
1823 | checked_rm(sl->link); | |
1824 | ||
1825 | checked_rm_args("%s/%s" ALT_TMP_EXT, altdir, sl->name); | |
1826 | checked_rm_args("%s/%s", altdir, sl->name); | |
1827 | } | |
1828 | /* Drop admin file */ | |
1829 | checked_rm_args("%s/%s", admdir, a->master_name); | |
1830 | } | |
1831 | ||
1832 | static const char * | |
1833 | alternative_remove(struct alternative *a, const char *current_choice, | |
1834 | const char *path) | |
1835 | { | |
1836 | const char *new_choice = NULL; | |
1837 | ||
1838 | if (alternative_has_choice(a, path)) | |
1839 | alternative_remove_choice(a, path); | |
1840 | else | |
1841 | verbose(_("alternative %s for %s not registered; not removing"), | |
1842 | path, a->master_name); | |
1843 | ||
1844 | if (current_choice && strcmp(current_choice, path) == 0) { | |
1845 | struct fileset *best; | |
1846 | ||
1847 | /* Current choice is removed. */ | |
1848 | if (a->status == ALT_ST_MANUAL) { | |
1849 | /* And it was manual, switch to auto. */ | |
1850 | info(_("removing manually selected alternative " | |
1851 | "- switching %s to auto mode"), | |
1852 | a->master_name); | |
1853 | alternative_set_status(a, ALT_ST_AUTO); | |
1854 | } | |
1855 | best = alternative_get_best(a); | |
1856 | if (best) | |
1857 | new_choice = best->master_file; | |
1858 | } | |
1859 | ||
1860 | return new_choice; | |
1861 | } | |
1862 | ||
1863 | static bool | |
1864 | alternative_has_broken_slave(struct slave_link *sl, struct fileset *fs) | |
1865 | { | |
1866 | if (fileset_can_install_slave(fs, sl->name)) { | |
1867 | char *wanted; | |
1868 | char *sl_altlnk, *sl_current; | |
1869 | ||
1870 | /* Verify link -> /etc/alternatives/foo */ | |
1871 | sl_altlnk = areadlink(sl->link); | |
1872 | if (!sl_altlnk) | |
1873 | return true; | |
1874 | wanted = xasprintf("%s/%s", altdir, sl->name); | |
1875 | if (strcmp(sl_altlnk, wanted) != 0) { | |
1876 | free(wanted); | |
1877 | free(sl_altlnk); | |
1878 | return true; | |
1879 | } | |
1880 | free(sl_altlnk); | |
1881 | /* Verify /etc/alternatives/foo -> file */ | |
1882 | sl_current = areadlink(wanted); | |
1883 | free(wanted); | |
1884 | if (!sl_current) | |
1885 | return true; | |
1886 | if (strcmp(sl_current, fileset_get_slave(fs, sl->name)) != 0) { | |
1887 | free(sl_current); | |
1888 | return true; | |
1889 | } | |
1890 | free(sl_current); | |
1891 | } else { | |
1892 | char *sl_altlnk; | |
1893 | ||
1894 | /* Slave link must not exist. */ | |
1895 | if (alternative_path_classify(sl->link) != ALT_PATH_MISSING) | |
1896 | return true; | |
1897 | sl_altlnk = xasprintf("%s/%s", altdir, sl->name); | |
1898 | if (alternative_path_classify(sl_altlnk) != ALT_PATH_MISSING) { | |
1899 | free(sl_altlnk); | |
1900 | return true; | |
1901 | } | |
1902 | free(sl_altlnk); | |
1903 | } | |
1904 | ||
1905 | return false; | |
1906 | } | |
1907 | ||
1908 | static enum alternative_update_reason | |
1909 | alternative_needs_update(struct alternative *a) | |
1910 | { | |
1911 | enum alternative_update_reason reason = ALT_UPDATE_NO; | |
1912 | const char *current; | |
1913 | char *altlnk, *wanted; | |
1914 | struct fileset *fs; | |
1915 | struct slave_link *sl; | |
1916 | ||
1917 | /* Check master link */ | |
1918 | altlnk = areadlink(a->master_link); | |
1919 | if (!altlnk) | |
1920 | return ALT_UPDATE_LINK_BROKEN; | |
1921 | wanted = xasprintf("%s/%s", altdir, a->master_name); | |
1922 | if (strcmp(altlnk, wanted) != 0) { | |
1923 | free(wanted); | |
1924 | free(altlnk); | |
1925 | return ALT_UPDATE_LINK_BROKEN; | |
1926 | } | |
1927 | free(wanted); | |
1928 | free(altlnk); | |
1929 | ||
1930 | /* Stop if we have an unmanaged alternative */ | |
1931 | current = alternative_get_current(a); | |
1932 | if (current == NULL) | |
1933 | return ALT_UPDATE_LINK_BROKEN; | |
1934 | ||
1935 | fs = alternative_get_fileset(a, current); | |
1936 | ||
1937 | /* Stop if we do not have the choice. */ | |
1938 | if (fs == NULL) | |
1939 | return ALT_UPDATE_NO; | |
1940 | ||
1941 | /* Check slaves */ | |
1942 | for (sl = a->slaves; sl; sl = sl->next) { | |
1943 | if (alternative_has_broken_slave(sl, fs)) { | |
1944 | if (sl->updated) | |
1945 | reason = ALT_UPDATE_SLAVE_CHANGED; | |
1946 | else | |
1947 | return ALT_UPDATE_LINK_BROKEN; | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | return reason; | |
1952 | } | |
1953 | ||
1954 | struct alternative_map { | |
1955 | struct alternative_map *next; | |
1956 | ||
1957 | const char *key; | |
1958 | struct alternative *item; | |
1959 | }; | |
1960 | ||
1961 | static struct alternative_map * | |
1962 | alternative_map_new(const char *key, struct alternative *a) | |
1963 | { | |
1964 | struct alternative_map *am; | |
1965 | ||
1966 | am = xmalloc(sizeof(*am)); | |
1967 | am->next = NULL; | |
1968 | am->key = key; | |
1969 | am->item = a; | |
1970 | ||
1971 | return am; | |
1972 | } | |
1973 | ||
1974 | static struct alternative * | |
1975 | alternative_map_find(struct alternative_map *am, const char *key) | |
1976 | { | |
1977 | for (; am; am = am->next) | |
1978 | if (am->key && strcmp(am->key, key) == 0) | |
1979 | return am->item; | |
1980 | ||
1981 | return NULL; | |
1982 | } | |
1983 | ||
1984 | static void | |
1985 | alternative_map_add(struct alternative_map *am, const char *key, | |
1986 | struct alternative *a) | |
1987 | { | |
1988 | if (am->key == NULL) { | |
1989 | am->key = key; | |
1990 | am->item = a; | |
1991 | } else { | |
1992 | struct alternative_map *new = alternative_map_new(key, a); | |
1993 | ||
1994 | while (am->next) | |
1995 | am = am->next; | |
1996 | am->next = new; | |
1997 | } | |
1998 | } | |
1999 | ||
2000 | static void | |
2001 | alternative_map_load_names(struct alternative_map *alt_map_obj) | |
2002 | { | |
2003 | struct dirent **table; | |
2004 | int i, count; | |
2005 | ||
2006 | count = altdb_get_namelist(&table); | |
2007 | for (i = 0; i < count; i++) { | |
2008 | struct alternative *a_new = alternative_new(table[i]->d_name); | |
2009 | ||
2010 | if (!alternative_load(a_new, ALTDB_LAX_PARSER)) { | |
2011 | alternative_free(a_new); | |
2012 | continue; | |
2013 | } | |
2014 | alternative_map_add(alt_map_obj, a_new->master_name, a_new); | |
2015 | } | |
2016 | altdb_free_namelist(table, count); | |
2017 | } | |
2018 | ||
2019 | static void | |
2020 | alternative_map_load_tree(struct alternative_map *alt_map_links, | |
2021 | struct alternative_map *alt_map_parent) | |
2022 | { | |
2023 | struct dirent **table; | |
2024 | int i, count; | |
2025 | ||
2026 | count = altdb_get_namelist(&table); | |
2027 | for (i = 0; i < count; i++) { | |
2028 | struct slave_link *sl; | |
2029 | struct alternative *a_new = alternative_new(table[i]->d_name); | |
2030 | ||
2031 | if (!alternative_load(a_new, ALTDB_LAX_PARSER)) { | |
2032 | alternative_free(a_new); | |
2033 | continue; | |
2034 | } | |
2035 | alternative_map_add(alt_map_links, a_new->master_link, a_new); | |
2036 | alternative_ref(a_new); | |
2037 | alternative_map_add(alt_map_parent, a_new->master_name, a_new); | |
2038 | for (sl = a_new->slaves; sl; sl = sl->next) { | |
2039 | alternative_ref(a_new); | |
2040 | alternative_map_add(alt_map_links, sl->link, a_new); | |
2041 | alternative_ref(a_new); | |
2042 | alternative_map_add(alt_map_parent, sl->name, a_new); | |
2043 | } | |
2044 | } | |
2045 | altdb_free_namelist(table, count); | |
2046 | } | |
2047 | ||
2048 | static void | |
2049 | alternative_map_free(struct alternative_map *am) | |
2050 | { | |
2051 | struct alternative_map *am_next; | |
2052 | ||
2053 | while (am) { | |
2054 | am_next = am->next; | |
2055 | if (am->item) | |
2056 | alternative_free(am->item); | |
2057 | free(am); | |
2058 | am = am_next; | |
2059 | } | |
2060 | } | |
2061 | ||
2062 | static const char * | |
2063 | alternative_set_manual(struct alternative *a, const char *path) | |
2064 | { | |
2065 | const char *new_choice = NULL; | |
2066 | ||
2067 | if (alternative_has_choice(a, path)) | |
2068 | new_choice = path; | |
2069 | else | |
2070 | error(_("alternative %s for %s not registered; " | |
2071 | "not setting"), path, a->master_name); | |
2072 | alternative_set_status(a, ALT_ST_MANUAL); | |
2073 | ||
2074 | return new_choice; | |
2075 | } | |
2076 | ||
2077 | static const char * | |
2078 | alternative_set_auto(struct alternative *a) | |
2079 | { | |
2080 | const char *new_choice = NULL; | |
2081 | ||
2082 | alternative_set_status(a, ALT_ST_AUTO); | |
2083 | if (alternative_choices_count(a) == 0) | |
2084 | pr(_("There is no program which provides %s."), | |
2085 | a->master_name); | |
2086 | else | |
2087 | new_choice = alternative_get_best(a)->master_file; | |
2088 | ||
2089 | return new_choice; | |
2090 | } | |
2091 | ||
2092 | static const char * | |
2093 | get_argv_string(int argc, char **argv) | |
2094 | { | |
2095 | static char string[2048]; | |
2096 | size_t cur_len; | |
2097 | int i; | |
2098 | ||
2099 | string[0] = '\0'; | |
2100 | cur_len = 0; | |
2101 | for (i = 1; i < argc; i++) { | |
2102 | size_t arg_len = strlen(argv[i]); | |
2103 | ||
2104 | if (cur_len + arg_len + 2 > sizeof(string)) | |
2105 | break; | |
2106 | if (cur_len) { | |
2107 | strcpy(string + cur_len, " "); | |
2108 | cur_len++; | |
2109 | } | |
2110 | strcpy(string + cur_len, argv[i]); | |
2111 | cur_len += arg_len; | |
2112 | } | |
2113 | ||
2114 | return string; | |
2115 | } | |
2116 | ||
2117 | static void | |
2118 | alternative_select_mode(struct alternative *a, const char *current_choice) | |
2119 | { | |
2120 | if (current_choice) { | |
2121 | /* Detect manually modified alternative, switch to manual. */ | |
2122 | if (!alternative_has_choice(a, current_choice)) { | |
2123 | if (pathname_is_missing(current_choice)) { | |
2124 | warning(_("%s/%s is dangling; it will be updated " | |
2125 | "with best choice"), altdir, a->master_name); | |
2126 | alternative_set_status(a, ALT_ST_AUTO); | |
2127 | } else if (a->status != ALT_ST_MANUAL) { | |
2128 | warning(_("%s/%s has been changed (manually or by " | |
2129 | "a script); switching to manual " | |
2130 | "updates only"), altdir, a->master_name); | |
2131 | alternative_set_status(a, ALT_ST_MANUAL); | |
2132 | } | |
2133 | } | |
2134 | } else { | |
2135 | /* Lack of alternative link => automatic mode. */ | |
2136 | verbose(_("setting up automatic selection of %s"), | |
2137 | a->master_name); | |
2138 | alternative_set_status(a, ALT_ST_AUTO); | |
2139 | } | |
2140 | } | |
2141 | ||
2142 | static void | |
2143 | alternative_evolve_slave(struct alternative *a, const char *cur_choice, | |
2144 | struct slave_link *sl, struct fileset *fs) | |
2145 | { | |
2146 | struct slave_link *sl_old; | |
2147 | char *new_file = NULL; | |
2148 | const char *old, *new; | |
2149 | ||
2150 | sl_old = alternative_get_slave(a, sl->name); | |
2151 | if (sl_old == NULL) { | |
2152 | sl->updated = true; | |
2153 | return; | |
2154 | } | |
2155 | ||
2156 | old = sl_old->link; | |
2157 | new = sl->link; | |
2158 | ||
2159 | if (cur_choice && strcmp(cur_choice, fs->master_file) == 0) { | |
2160 | new_file = xstrdup(fileset_get_slave(fs, sl->name)); | |
2161 | } else { | |
2162 | char *lnk; | |
2163 | ||
2164 | lnk = xasprintf("%s/%s", altdir, sl->name); | |
2165 | new_file = areadlink(lnk); | |
2166 | free(lnk); | |
2167 | } | |
2168 | if (strcmp(old, new) != 0 && | |
2169 | alternative_path_classify(old) == ALT_PATH_SYMLINK) { | |
2170 | bool rename_link = false; | |
2171 | ||
2172 | if (new_file) | |
2173 | rename_link = !pathname_is_missing(new_file); | |
2174 | ||
2175 | if (rename_link) { | |
2176 | info(_("renaming %s slave link from %s to %s"), | |
2177 | sl->name, old, new); | |
2178 | checked_mv(old, new); | |
2179 | } else { | |
2180 | checked_rm(old); | |
2181 | } | |
2182 | ||
2183 | sl->updated = true; | |
2184 | } | |
2185 | free(new_file); | |
2186 | } | |
2187 | ||
2188 | static void | |
2189 | alternative_evolve(struct alternative *a, struct alternative *b, | |
2190 | const char *cur_choice, struct fileset *fs) | |
2191 | { | |
2192 | struct slave_link *sl; | |
2193 | bool is_link; | |
2194 | ||
2195 | is_link = alternative_path_classify(a->master_link) == ALT_PATH_SYMLINK; | |
2196 | if (is_link && strcmp(a->master_link, b->master_link) != 0) { | |
2197 | info(_("renaming %s link from %s to %s"), b->master_name, | |
2198 | a->master_link, b->master_link); | |
2199 | checked_mv(a->master_link, b->master_link); | |
2200 | } | |
2201 | alternative_set_link(a, b->master_link); | |
2202 | ||
2203 | /* Check if new slaves have been added, or existing | |
2204 | * ones renamed. */ | |
2205 | for (sl = b->slaves; sl; sl = sl->next) { | |
2206 | alternative_evolve_slave(a, cur_choice, sl, fs); | |
2207 | alternative_copy_slave(a, sl); | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | static void | |
2212 | alternative_update(struct alternative *a, | |
2213 | const char *current_choice, const char *new_choice) | |
2214 | { | |
2215 | enum alternative_update_reason reason; | |
2216 | ||
2217 | /* No choice left, remove everything. */ | |
2218 | if (!alternative_choices_count(a)) { | |
2219 | log_msg("link group %s fully removed", a->master_name); | |
2220 | alternative_remove_files(a); | |
2221 | return; | |
2222 | } | |
2223 | ||
2224 | /* New choice wanted. */ | |
2225 | if (new_choice && | |
2226 | (!current_choice || strcmp(new_choice, current_choice) != 0)) { | |
2227 | log_msg("link group %s updated to point to %s", a->master_name, | |
2228 | new_choice); | |
2229 | if (a->status == ALT_ST_AUTO) | |
2230 | info(_("using %s to provide %s (%s) in auto mode"), | |
2231 | new_choice, a->master_link, a->master_name); | |
2232 | else | |
2233 | info(_("using %s to provide %s (%s) in manual mode"), | |
2234 | new_choice, a->master_link, a->master_name); | |
2235 | debug("prepare_install(%s)", new_choice); | |
2236 | alternative_prepare_install(a, new_choice); | |
2237 | } else if ((reason = alternative_needs_update(a))) { | |
2238 | if (reason == ALT_UPDATE_SLAVE_CHANGED) { | |
2239 | log_msg("link group %s updated with changed slaves", | |
2240 | a->master_name); | |
2241 | info(_("updating alternative %s " | |
2242 | "because link group %s has changed slave links"), | |
2243 | current_choice, a->master_name); | |
2244 | } else { | |
2245 | log_msg("auto-repair link group %s", a->master_name); | |
2246 | warning(_("forcing reinstallation of alternative %s " | |
2247 | "because link group %s is broken"), | |
2248 | current_choice, a->master_name); | |
2249 | } | |
2250 | ||
2251 | if (current_choice && !alternative_has_choice(a, current_choice)) { | |
2252 | struct fileset *best = alternative_get_best(a); | |
2253 | ||
2254 | warning(_("current alternative %s is unknown, " | |
2255 | "switching to %s for link group %s"), | |
2256 | current_choice, best->master_file, | |
2257 | a->master_name); | |
2258 | current_choice = best->master_file; | |
2259 | alternative_set_status(a, ALT_ST_AUTO); | |
2260 | } | |
2261 | ||
2262 | if (current_choice) | |
2263 | alternative_prepare_install(a, current_choice); | |
2264 | } | |
2265 | ||
2266 | /* Save administrative file if needed. */ | |
2267 | if (a->modified) { | |
2268 | debug("%s is modified and will be saved", a->master_name); | |
2269 | alternative_save(a); | |
2270 | } | |
2271 | ||
2272 | /* Replace all symlinks in one pass. */ | |
2273 | alternative_commit(a); | |
2274 | } | |
2275 | ||
2276 | static void | |
2277 | alternative_config_all(void) | |
2278 | { | |
2279 | struct alternative_map *alt_map_obj; | |
2280 | struct alternative_map *am; | |
2281 | ||
2282 | alt_map_obj = alternative_map_new(NULL, NULL); | |
2283 | alternative_map_load_names(alt_map_obj); | |
2284 | ||
2285 | for (am = alt_map_obj; am && am->item; am = am->next) { | |
2286 | const char *current_choice; | |
2287 | char *new_choice; | |
2288 | ||
2289 | current_choice = alternative_get_current(am->item); | |
2290 | alternative_select_mode(am->item, current_choice); | |
2291 | ||
2292 | new_choice = alternative_config(am->item, current_choice); | |
2293 | ||
2294 | alternative_update(am->item, current_choice, new_choice); | |
2295 | ||
2296 | free(new_choice); | |
2297 | } | |
2298 | ||
2299 | alternative_map_free(alt_map_obj); | |
2300 | } | |
2301 | ||
2302 | static void | |
2303 | alternative_get_selections(void) | |
2304 | { | |
2305 | struct alternative_map *alt_map_obj; | |
2306 | struct alternative_map *am; | |
2307 | ||
2308 | alt_map_obj = alternative_map_new(NULL, NULL); | |
2309 | alternative_map_load_names(alt_map_obj); | |
2310 | ||
2311 | for (am = alt_map_obj; am && am->item; am = am->next) { | |
2312 | const char *current; | |
2313 | ||
2314 | current = alternative_get_current(am->item); | |
2315 | printf("%-30s %-8s %s\n", am->key, | |
2316 | alternative_status_string(am->item->status), | |
2317 | current ? current : ""); | |
2318 | } | |
2319 | ||
2320 | alternative_map_free(alt_map_obj); | |
2321 | } | |
2322 | ||
2323 | static void | |
2324 | alternative_set_selection(struct alternative_map *all, const char *name, | |
2325 | const char *status, const char *choice) | |
2326 | { | |
2327 | struct alternative *a; | |
2328 | ||
2329 | debug("set_selection(%s, %s, %s)", name, status, choice); | |
2330 | a = alternative_map_find(all, name); | |
2331 | if (a) { | |
2332 | const char *new_choice = NULL; | |
2333 | ||
2334 | if (strcmp(status, "auto") == 0) { | |
2335 | new_choice = alternative_set_auto(a); | |
2336 | } else if (alternative_has_choice(a, choice)) { | |
2337 | new_choice = alternative_set_manual(a, choice); | |
2338 | } else { | |
2339 | pr(_("Alternative %s unchanged because choice " | |
2340 | "%s is not available."), name, choice); | |
2341 | } | |
2342 | ||
2343 | if (new_choice) { | |
2344 | const char *current_choice; | |
2345 | ||
2346 | current_choice = alternative_get_current(a); | |
2347 | alternative_select_mode(a, current_choice); | |
2348 | ||
2349 | alternative_update(a, current_choice, new_choice); | |
2350 | } | |
2351 | } else { | |
2352 | pr(_("Skip unknown alternative %s."), name); | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | static void | |
2357 | alternative_set_selections(FILE *input, const char *desc) | |
2358 | { | |
2359 | struct alternative_map *alt_map_obj; | |
2360 | ||
2361 | alt_map_obj = alternative_map_new(NULL, NULL); | |
2362 | alternative_map_load_names(alt_map_obj); | |
2363 | ||
2364 | for (;;) { | |
2365 | char line[1024], *res, *name, *status, *choice; | |
2366 | size_t len, i; | |
2367 | ||
2368 | errno = 0; | |
2369 | /* Can't use scanf("%s %s %s") because choice can | |
2370 | * contain a space */ | |
2371 | res = fgets(line, sizeof(line), input); | |
2372 | if (res == NULL && errno) { | |
2373 | syserr(_("read error in %.250s"), desc); | |
2374 | } else if (res == NULL) { | |
2375 | break; | |
2376 | } | |
2377 | len = strlen(line); | |
2378 | if (len == 0 || line[len - 1] != '\n') { | |
2379 | error(_("line too long or not terminated while " | |
2380 | "trying to read %s"), desc); | |
2381 | } | |
2382 | line[len - 1] = '\0'; | |
2383 | len--; | |
2384 | ||
2385 | /* Delimit name string in line */ | |
2386 | i = 0; | |
2387 | name = line; | |
2388 | while (i < len && !isblank(line[i])) | |
2389 | i++; | |
2390 | if (i >= len) { | |
2391 | printf("[%s %s] ", PROGNAME, "--set-selections"); | |
2392 | pr(_("Skip invalid line: %s"), line); | |
2393 | continue; | |
2394 | } | |
2395 | line[i++] = '\0'; | |
2396 | while (i < len && isblank(line[i])) | |
2397 | i++; | |
2398 | ||
2399 | /* Delimit status string in line */ | |
2400 | status = line + i; | |
2401 | while (i < len && !isblank(line[i])) | |
2402 | i++; | |
2403 | if (i >= len) { | |
2404 | printf("[%s %s] ", PROGNAME, "--set-selections"); | |
2405 | pr(_("Skip invalid line: %s"), line); | |
2406 | continue; | |
2407 | } | |
2408 | line[i++] = '\0'; | |
2409 | while (i < len && isblank(line[i])) | |
2410 | i++; | |
2411 | ||
2412 | /* Delimit choice string in the line */ | |
2413 | if (i >= len) { | |
2414 | printf("[%s %s] ", PROGNAME, "--set-selections"); | |
2415 | pr(_("Skip invalid line: %s"), line); | |
2416 | continue; | |
2417 | } | |
2418 | choice = line + i; | |
2419 | ||
2420 | printf("[%s %s] ", PROGNAME, "--set-selections"); | |
2421 | alternative_set_selection(alt_map_obj, name, status, choice); | |
2422 | } | |
2423 | ||
2424 | alternative_map_free(alt_map_obj); | |
2425 | } | |
2426 | ||
2427 | static void | |
2428 | alternative_check_name(const char *name) | |
2429 | { | |
2430 | if (strpbrk(name, "/ \t")) | |
2431 | error(_("alternative name (%s) must not contain '/' " | |
2432 | "and spaces"), name); | |
2433 | } | |
2434 | ||
2435 | static void | |
2436 | alternative_check_link(const char *linkname) | |
2437 | { | |
2438 | if (linkname[0] != '/') | |
2439 | error(_("alternative link is not absolute as it should be: %s"), | |
2440 | linkname); | |
2441 | } | |
2442 | ||
2443 | static void | |
2444 | alternative_check_path(const char *file) | |
2445 | { | |
2446 | if (!file || file[0] != '/') | |
2447 | error(_("alternative path is not absolute as it should be: %s"), | |
2448 | file); | |
2449 | } | |
2450 | ||
2451 | /** | |
2452 | * Check the alternative installation arguments. | |
2453 | * | |
2454 | * That the caller doesn't mix links between alternatives, doesn't mix | |
2455 | * alternatives between slave/master, and that the various parameters | |
2456 | * are fine. | |
2457 | */ | |
2458 | static void | |
2459 | alternative_check_install_args(struct alternative *inst_alt, | |
2460 | struct fileset *fileset) | |
2461 | { | |
2462 | struct alternative_map *alt_map_links, *alt_map_parent; | |
2463 | struct alternative *found; | |
2464 | struct slave_link *sl; | |
2465 | ||
2466 | alternative_check_name(inst_alt->master_name); | |
2467 | alternative_check_link(inst_alt->master_link); | |
2468 | alternative_check_path(fileset->master_file); | |
2469 | ||
2470 | /* Load information about all alternatives to check for mistakes. */ | |
2471 | alt_map_links = alternative_map_new(NULL, NULL); | |
2472 | alt_map_parent = alternative_map_new(NULL, NULL); | |
2473 | alternative_map_load_tree(alt_map_links, alt_map_parent); | |
2474 | ||
2475 | found = alternative_map_find(alt_map_parent, inst_alt->master_name); | |
2476 | if (found && strcmp(found->master_name, inst_alt->master_name) != 0) { | |
2477 | error(_("alternative %s can't be master: it is a slave of %s"), | |
2478 | inst_alt->master_name, found->master_name); | |
2479 | } | |
2480 | ||
2481 | found = alternative_map_find(alt_map_links, inst_alt->master_link); | |
2482 | if (found && strcmp(found->master_name, inst_alt->master_name) != 0) { | |
2483 | found = alternative_map_find(alt_map_parent, | |
2484 | found->master_name); | |
2485 | error(_("alternative link %s is already managed by %s"), | |
2486 | inst_alt->master_link, found->master_name); | |
2487 | } | |
2488 | ||
2489 | if (pathname_is_missing(fileset->master_file)) | |
2490 | error(_("alternative path %s doesn't exist"), | |
2491 | fileset->master_file); | |
2492 | ||
2493 | for (sl = inst_alt->slaves; sl; sl = sl->next) { | |
2494 | const char *file = fileset_get_slave(fileset, sl->name); | |
2495 | ||
2496 | alternative_check_name(sl->name); | |
2497 | alternative_check_link(sl->link); | |
2498 | alternative_check_path(file); | |
2499 | ||
2500 | found = alternative_map_find(alt_map_parent, sl->name); | |
2501 | if (found && | |
2502 | strcmp(found->master_name, inst_alt->master_name) != 0) { | |
2503 | if (strcmp(found->master_name, sl->name) == 0) | |
2504 | error(_("alternative %s can't be slave of %s: " | |
2505 | "it is a master alternative"), | |
2506 | sl->name, inst_alt->master_name); | |
2507 | else | |
2508 | error(_("alternative %s can't be slave of %s: " | |
2509 | "it is a slave of %s"), | |
2510 | sl->name, inst_alt->master_name, | |
2511 | found->master_name); | |
2512 | } | |
2513 | ||
2514 | found = alternative_map_find(alt_map_links, sl->link); | |
2515 | if (found && | |
2516 | strcmp(found->master_name, inst_alt->master_name) != 0) { | |
2517 | error(_("alternative link %s is already " | |
2518 | "managed by %s"), sl->link, | |
2519 | found->master_name); | |
2520 | } | |
2521 | if (found) { | |
2522 | struct slave_link *sl2; | |
2523 | ||
2524 | for (sl2 = found->slaves; sl2; sl2 = sl2->next) | |
2525 | if (strcmp(sl2->link, sl->link) == 0) | |
2526 | break; | |
2527 | if (sl2 && strcmp(sl2->name, sl->name) != 0) | |
2528 | error(_("alternative link %s is already " | |
2529 | "managed by %s (slave of %s)"), | |
2530 | sl->link, sl2->name, | |
2531 | found->master_name); | |
2532 | } | |
2533 | } | |
2534 | ||
2535 | alternative_map_free(alt_map_links); | |
2536 | alternative_map_free(alt_map_parent); | |
2537 | } | |
2538 | ||
2539 | /* | |
2540 | * Main program | |
2541 | */ | |
2542 | ||
2543 | #define MISSING_ARGS(nb) (argc < i + nb + 1) | |
2544 | ||
2545 | int | |
2546 | main(int argc, char **argv) | |
2547 | { | |
2548 | /* Alternative worked on. */ | |
2549 | struct alternative *a = NULL; | |
2550 | /* Alternative to install. */ | |
2551 | struct alternative *inst_alt = NULL; | |
2552 | /* Set of files to install in the alternative. */ | |
2553 | struct fileset *fileset = NULL; | |
2554 | /* Path of alternative we are offering. */ | |
2555 | char *path = NULL; | |
2556 | const char *current_choice = NULL; | |
2557 | const char *new_choice = NULL; | |
2558 | bool modifies_alt = false; | |
2559 | bool modifies_sys = false; | |
2560 | int i = 0; | |
2561 | ||
2562 | setlocale(LC_ALL, ""); | |
2563 | bindtextdomain(PACKAGE, LOCALEDIR); | |
2564 | textdomain(PACKAGE); | |
2565 | ||
2566 | admdir = admindir_init(); | |
2567 | ||
2568 | if (setvbuf(stdout, NULL, _IONBF, 0)) | |
2569 | syserr("setvbuf failed"); | |
2570 | ||
2571 | prog_path = argv[0]; | |
2572 | ||
2573 | for (i = 1; i < argc; i++) { | |
2574 | if (strstr(argv[i], "--") != argv[i]) { | |
2575 | error(_("unknown argument '%s'"), argv[i]); | |
2576 | } else if (strcmp("--help", argv[i]) == 0) { | |
2577 | usage(); | |
2578 | exit(0); | |
2579 | } else if (strcmp("--version", argv[i]) == 0) { | |
2580 | version(); | |
2581 | exit(0); | |
2582 | } else if (strcmp("--verbose", argv[i]) == 0) { | |
2583 | opt_verbose++; | |
2584 | } else if (strcmp("--quiet", argv[i]) == 0) { | |
2585 | opt_verbose--; | |
2586 | } else if (strcmp("--install", argv[i]) == 0) { | |
2587 | char *prio_str, *prio_end; | |
2588 | long prio; | |
2589 | ||
2590 | set_action("install"); | |
2591 | if (MISSING_ARGS(4)) | |
2592 | badusage(_("--install needs <link> <name> " | |
2593 | "<path> <priority>")); | |
2594 | ||
2595 | prio_str = argv[i + 4]; | |
2596 | ||
2597 | if (strcmp(argv[i+1], argv[i+3]) == 0) | |
2598 | badusage(_("<link> and <path> can't be the same")); | |
2599 | errno = 0; | |
2600 | prio = strtol(prio_str, &prio_end, 10); | |
2601 | if (prio_str == prio_end || *prio_end != '\0') | |
2602 | badusage(_("priority must be an integer")); | |
2603 | if (prio < INT_MIN || prio > INT_MAX || errno == ERANGE) | |
2604 | badusage(_("priority is out of range")); | |
2605 | ||
2606 | a = alternative_new(argv[i + 2]); | |
2607 | inst_alt = alternative_new(argv[i + 2]); | |
2608 | alternative_set_status(inst_alt, ALT_ST_AUTO); | |
2609 | alternative_set_link(inst_alt, argv[i + 1]); | |
2610 | fileset = fileset_new(argv[i + 3], prio); | |
2611 | ||
2612 | i += 4; | |
2613 | } else if (strcmp("--remove", argv[i]) == 0 || | |
2614 | strcmp("--set", argv[i]) == 0) { | |
2615 | set_action(argv[i] + 2); | |
2616 | if (MISSING_ARGS(2)) | |
2617 | badusage(_("--%s needs <name> <path>"), argv[i] + 2); | |
2618 | ||
2619 | a = alternative_new(argv[i + 1]); | |
2620 | path = xstrdup(argv[i + 2]); | |
2621 | ||
2622 | alternative_check_name(a->master_name); | |
2623 | alternative_check_path(path); | |
2624 | ||
2625 | i += 2; | |
2626 | } else if (strcmp("--display", argv[i]) == 0 || | |
2627 | strcmp("--query", argv[i]) == 0 || | |
2628 | strcmp("--auto", argv[i]) == 0 || | |
2629 | strcmp("--config", argv[i]) == 0 || | |
2630 | strcmp("--list", argv[i]) == 0 || | |
2631 | strcmp("--remove-all", argv[i]) == 0) { | |
2632 | set_action(argv[i] + 2); | |
2633 | if (MISSING_ARGS(1)) | |
2634 | badusage(_("--%s needs <name>"), argv[i] + 2); | |
2635 | a = alternative_new(argv[i + 1]); | |
2636 | ||
2637 | alternative_check_name(a->master_name); | |
2638 | ||
2639 | i++; | |
2640 | } else if (strcmp("--all", argv[i]) == 0 || | |
2641 | strcmp("--get-selections", argv[i]) == 0 || | |
2642 | strcmp("--set-selections", argv[i]) == 0) { | |
2643 | set_action(argv[i] + 2); | |
2644 | } else if (strcmp("--slave", argv[i]) == 0) { | |
2645 | const char *slink, *sname, *spath; | |
2646 | struct slave_link *sl; | |
2647 | ||
2648 | if (action == NULL || | |
2649 | (action && strcmp(action, "install") != 0)) | |
2650 | badusage(_("--slave only allowed with --install")); | |
2651 | if (MISSING_ARGS(3)) | |
2652 | badusage(_("--slave needs <link> <name> <path>")); | |
2653 | ||
2654 | slink = argv[i + 1]; | |
2655 | sname = argv[i + 2]; | |
2656 | spath = argv[i + 3]; | |
2657 | ||
2658 | if (strcmp(slink, spath) == 0) | |
2659 | badusage(_("<link> and <path> can't be the same")); | |
2660 | if (strcmp(inst_alt->master_name, sname) == 0) | |
2661 | badusage(_("name %s is both primary and slave"), | |
2662 | sname); | |
2663 | if (strcmp(slink, inst_alt->master_link) == 0) | |
2664 | badusage(_("link %s is both primary and slave"), | |
2665 | slink); | |
2666 | if (alternative_has_slave(inst_alt, sname)) | |
2667 | badusage(_("duplicate slave name %s"), sname); | |
2668 | ||
2669 | for (sl = inst_alt->slaves; sl; sl = sl->next) { | |
2670 | const char *linkname = sl->link; | |
2671 | if (linkname == NULL) | |
2672 | linkname = ""; | |
2673 | if (strcmp(linkname, slink) == 0) | |
2674 | badusage(_("duplicate slave link %s"), | |
2675 | slink); | |
2676 | } | |
2677 | ||
2678 | alternative_add_slave(inst_alt, sname, slink); | |
2679 | fileset_add_slave(fileset, sname, spath); | |
2680 | ||
2681 | i+= 3; | |
2682 | } else if (strcmp("--log", argv[i]) == 0) { | |
2683 | if (MISSING_ARGS(1)) | |
2684 | badusage(_("--%s needs a <file> argument"), "log"); | |
2685 | log_file = argv[i + 1]; | |
2686 | i++; | |
2687 | } else if (strcmp("--altdir", argv[i]) == 0) { | |
2688 | if (MISSING_ARGS(1)) | |
2689 | badusage(_("--%s needs a <directory> argument"), "log"); | |
2690 | altdir = argv[i + 1]; | |
2691 | i++; | |
2692 | } else if (strcmp("--admindir", argv[i]) == 0) { | |
2693 | if (MISSING_ARGS(1)) | |
2694 | badusage(_("--%s needs a <directory> argument"), "log"); | |
2695 | admdir = argv[i + 1]; | |
2696 | i++; | |
2697 | } else if (strcmp("--skip-auto", argv[i]) == 0) { | |
2698 | opt_skip_auto = 1; | |
2699 | } else if (strcmp("--force", argv[i]) == 0) { | |
2700 | opt_force = 1; | |
2701 | } else { | |
2702 | badusage(_("unknown option '%s'"), argv[i]); | |
2703 | } | |
2704 | } | |
2705 | ||
2706 | if (!action) | |
2707 | badusage(_("need --display, --query, --list, --get-selections, " | |
2708 | "--config, --set, --set-selections, --install, " | |
2709 | "--remove, --all, --remove-all or --auto")); | |
2710 | ||
2711 | /* The following actions might modify the current alternative. */ | |
2712 | if (strcmp(action, "set") == 0 || | |
2713 | strcmp(action, "auto") == 0 || | |
2714 | strcmp(action, "config") == 0 || | |
2715 | strcmp(action, "remove") == 0 || | |
2716 | strcmp(action, "remove-all") == 0 || | |
2717 | strcmp(action, "install") == 0) | |
2718 | modifies_alt = true; | |
2719 | ||
2720 | /* The following actions might modify the system somehow. */ | |
2721 | if (modifies_alt || | |
2722 | strcmp(action, "all") == 0 || | |
2723 | strcmp(action, "set-selections") == 0) | |
2724 | modifies_sys = true; | |
2725 | ||
2726 | if (strcmp(action, "install") == 0) | |
2727 | alternative_check_install_args(inst_alt, fileset); | |
2728 | ||
2729 | if (strcmp(action, "display") == 0 || | |
2730 | strcmp(action, "query") == 0 || | |
2731 | strcmp(action, "list") == 0 || | |
2732 | strcmp(action, "set") == 0 || | |
2733 | strcmp(action, "auto") == 0 || | |
2734 | strcmp(action, "config") == 0 || | |
2735 | strcmp(action, "remove-all") == 0) { | |
2736 | /* Load the alternative info, stop on failure. */ | |
2737 | if (!alternative_load(a, ALTDB_WARN_PARSER)) | |
2738 | error(_("no alternatives for %s"), a->master_name); | |
2739 | } else if (strcmp(action, "remove") == 0) { | |
2740 | /* FIXME: Be consistent for now with the case when we | |
2741 | * try to remove a non-existing path from an existing | |
2742 | * link group file. */ | |
2743 | if (!alternative_load(a, ALTDB_WARN_PARSER)) { | |
2744 | verbose(_("no alternatives for %s"), a->master_name); | |
2745 | exit(0); | |
2746 | } | |
2747 | } else if (strcmp(action, "install") == 0) { | |
2748 | /* Load the alternative info, ignore failures. */ | |
2749 | alternative_load(a, ALTDB_WARN_PARSER); | |
2750 | } | |
2751 | ||
2752 | if (modifies_sys) | |
2753 | log_msg("run with %s", get_argv_string(argc, argv)); | |
2754 | ||
2755 | if (modifies_alt) { | |
2756 | current_choice = alternative_get_current(a); | |
2757 | alternative_select_mode(a, current_choice); | |
2758 | } | |
2759 | ||
2760 | /* Handle actions. */ | |
2761 | if (strcmp(action, "all") == 0) { | |
2762 | alternative_config_all(); | |
2763 | } else if (strcmp(action, "get-selections") == 0) { | |
2764 | alternative_get_selections(); | |
2765 | } else if (strcmp(action, "set-selections") == 0) { | |
2766 | alternative_set_selections(stdin, _("<standard input>")); | |
2767 | } else if (strcmp(action, "display") == 0) { | |
2768 | alternative_display_user(a); | |
2769 | } else if (strcmp(action, "query") == 0) { | |
2770 | alternative_display_query(a); | |
2771 | } else if (strcmp(action, "list") == 0) { | |
2772 | alternative_display_list(a); | |
2773 | } else if (strcmp(action, "set") == 0) { | |
2774 | new_choice = alternative_set_manual(a, path); | |
2775 | } else if (strcmp(action, "auto") == 0) { | |
2776 | new_choice = alternative_set_auto(a); | |
2777 | } else if (strcmp(action, "config") == 0) { | |
2778 | new_choice = alternative_config(a, current_choice); | |
2779 | } else if (strcmp(action, "remove") == 0) { | |
2780 | new_choice = alternative_remove(a, current_choice, path); | |
2781 | } else if (strcmp(action, "remove-all") == 0) { | |
2782 | alternative_choices_free(a); | |
2783 | } else if (strcmp(action, "install") == 0) { | |
2784 | if (a->master_link) { | |
2785 | /* Alternative already exists, check if anything got | |
2786 | * updated. */ | |
2787 | alternative_evolve(a, inst_alt, current_choice, fileset); | |
2788 | } else { | |
2789 | /* Alternative doesn't exist, create from parameters. */ | |
2790 | alternative_free(a); | |
2791 | a = inst_alt; | |
2792 | } | |
2793 | alternative_add_choice(a, fileset); | |
2794 | if (a->status == ALT_ST_AUTO) { | |
2795 | new_choice = alternative_get_best(a)->master_file; | |
2796 | } else { | |
2797 | verbose(_("automatic updates of %s/%s are disabled; " | |
2798 | "leaving it alone"), altdir, a->master_name); | |
2799 | verbose(_("to return to automatic updates use " | |
2800 | "'%s --auto %s'"), PROGNAME, a->master_name); | |
2801 | } | |
2802 | } | |
2803 | ||
2804 | if (modifies_alt) | |
2805 | alternative_update(a, current_choice, new_choice); | |
2806 | ||
2807 | return 0; | |
2808 | } |