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1 | /*** | |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2011 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty <of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <dirent.h> | |
21 | #include <errno.h> | |
22 | #include <fcntl.h> | |
23 | #include <fnmatch.h> | |
24 | #include <limits.h> | |
25 | #include <stddef.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/stat.h> | |
30 | #include <unistd.h> | |
31 | ||
32 | #include "alloc-util.h" | |
33 | #include "conf-files.h" | |
34 | #include "conf-parser.h" | |
35 | #include "dirent-util.h" | |
36 | #include "extract-word.h" | |
37 | #include "fd-util.h" | |
38 | #include "fileio.h" | |
39 | #include "fs-util.h" | |
40 | #include "hashmap.h" | |
41 | #include "install-printf.h" | |
42 | #include "install.h" | |
43 | #include "log.h" | |
44 | #include "macro.h" | |
45 | #include "mkdir.h" | |
46 | #include "path-lookup.h" | |
47 | #include "path-util.h" | |
48 | #include "set.h" | |
49 | #include "special.h" | |
50 | #include "stat-util.h" | |
51 | #include "string-table.h" | |
52 | #include "string-util.h" | |
53 | #include "strv.h" | |
54 | #include "unit-name.h" | |
55 | ||
56 | #define UNIT_FILE_FOLLOW_SYMLINK_MAX 64 | |
57 | ||
58 | typedef enum SearchFlags { | |
59 | SEARCH_LOAD = 1, | |
60 | SEARCH_FOLLOW_CONFIG_SYMLINKS = 2, | |
61 | } SearchFlags; | |
62 | ||
63 | typedef struct { | |
64 | OrderedHashmap *will_process; | |
65 | OrderedHashmap *have_processed; | |
66 | } InstallContext; | |
67 | ||
68 | static int in_search_path(const char *path, char **search) { | |
69 | _cleanup_free_ char *parent = NULL; | |
70 | char **i; | |
71 | ||
72 | assert(path); | |
73 | ||
74 | parent = dirname_malloc(path); | |
75 | if (!parent) | |
76 | return -ENOMEM; | |
77 | ||
78 | STRV_FOREACH(i, search) | |
79 | if (path_equal(parent, *i)) | |
80 | return true; | |
81 | ||
82 | return false; | |
83 | } | |
84 | ||
85 | static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) { | |
86 | char *p = NULL; | |
87 | int r; | |
88 | ||
89 | assert(scope >= 0); | |
90 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
91 | assert(ret); | |
92 | ||
93 | /* This determines where we shall create or remove our | |
94 | * installation ("configuration") symlinks */ | |
95 | ||
96 | switch (scope) { | |
97 | ||
98 | case UNIT_FILE_SYSTEM: | |
99 | ||
100 | if (runtime) | |
101 | p = path_join(root_dir, "/run/systemd/system", NULL); | |
102 | else | |
103 | p = path_join(root_dir, SYSTEM_CONFIG_UNIT_PATH, NULL); | |
104 | break; | |
105 | ||
106 | case UNIT_FILE_GLOBAL: | |
107 | ||
108 | if (root_dir) | |
109 | return -EINVAL; | |
110 | ||
111 | if (runtime) | |
112 | p = strdup("/run/systemd/user"); | |
113 | else | |
114 | p = strdup(USER_CONFIG_UNIT_PATH); | |
115 | break; | |
116 | ||
117 | case UNIT_FILE_USER: | |
118 | ||
119 | if (root_dir) | |
120 | return -EINVAL; | |
121 | ||
122 | if (runtime) | |
123 | r = user_runtime_dir(&p); | |
124 | else | |
125 | r = user_config_home(&p); | |
126 | if (r < 0) | |
127 | return r; | |
128 | if (r == 0) | |
129 | return -ENOENT; | |
130 | ||
131 | break; | |
132 | ||
133 | default: | |
134 | assert_not_reached("Bad scope"); | |
135 | } | |
136 | ||
137 | if (!p) | |
138 | return -ENOMEM; | |
139 | ||
140 | *ret = p; | |
141 | return 0; | |
142 | } | |
143 | ||
144 | static bool is_config_path(UnitFileScope scope, const char *path) { | |
145 | int r; | |
146 | ||
147 | assert(scope >= 0); | |
148 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
149 | assert(path); | |
150 | ||
151 | /* Checks whether the specified path is intended for | |
152 | * configuration or is outside of it */ | |
153 | ||
154 | switch (scope) { | |
155 | ||
156 | case UNIT_FILE_SYSTEM: | |
157 | case UNIT_FILE_GLOBAL: | |
158 | return path_startswith(path, "/etc") || | |
159 | path_startswith(path, SYSTEM_CONFIG_UNIT_PATH) || | |
160 | path_startswith(path, "/run"); | |
161 | ||
162 | ||
163 | case UNIT_FILE_USER: { | |
164 | _cleanup_free_ char *p = NULL; | |
165 | ||
166 | r = user_config_home(&p); | |
167 | if (r < 0) | |
168 | return r; | |
169 | if (r > 0 && path_startswith(path, p)) | |
170 | return true; | |
171 | ||
172 | p = mfree(p); | |
173 | ||
174 | r = user_runtime_dir(&p); | |
175 | if (r < 0) | |
176 | return r; | |
177 | if (r > 0 && path_startswith(path, p)) | |
178 | return true; | |
179 | ||
180 | return false; | |
181 | } | |
182 | ||
183 | default: | |
184 | assert_not_reached("Bad scope"); | |
185 | } | |
186 | } | |
187 | ||
188 | ||
189 | static int verify_root_dir(UnitFileScope scope, const char **root_dir) { | |
190 | int r; | |
191 | ||
192 | assert(root_dir); | |
193 | ||
194 | /* Verifies that the specified root directory to operate on | |
195 | * makes sense. Reset it to NULL if it is the root directory | |
196 | * or set to empty */ | |
197 | ||
198 | if (isempty(*root_dir) || path_equal(*root_dir, "/")) { | |
199 | *root_dir = NULL; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | if (scope != UNIT_FILE_SYSTEM) | |
204 | return -EINVAL; | |
205 | ||
206 | r = is_dir(*root_dir, true); | |
207 | if (r < 0) | |
208 | return r; | |
209 | if (r == 0) | |
210 | return -ENOTDIR; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | int unit_file_changes_add( | |
216 | UnitFileChange **changes, | |
217 | unsigned *n_changes, | |
218 | UnitFileChangeType type, | |
219 | const char *path, | |
220 | const char *source) { | |
221 | ||
222 | UnitFileChange *c; | |
223 | unsigned i; | |
224 | ||
225 | assert(path); | |
226 | assert(!changes == !n_changes); | |
227 | ||
228 | if (!changes) | |
229 | return 0; | |
230 | ||
231 | c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange)); | |
232 | if (!c) | |
233 | return -ENOMEM; | |
234 | ||
235 | *changes = c; | |
236 | i = *n_changes; | |
237 | ||
238 | c[i].type = type; | |
239 | c[i].path = strdup(path); | |
240 | if (!c[i].path) | |
241 | return -ENOMEM; | |
242 | ||
243 | path_kill_slashes(c[i].path); | |
244 | ||
245 | if (source) { | |
246 | c[i].source = strdup(source); | |
247 | if (!c[i].source) { | |
248 | free(c[i].path); | |
249 | return -ENOMEM; | |
250 | } | |
251 | ||
252 | path_kill_slashes(c[i].path); | |
253 | } else | |
254 | c[i].source = NULL; | |
255 | ||
256 | *n_changes = i+1; | |
257 | return 0; | |
258 | } | |
259 | ||
260 | void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) { | |
261 | unsigned i; | |
262 | ||
263 | assert(changes || n_changes == 0); | |
264 | ||
265 | if (!changes) | |
266 | return; | |
267 | ||
268 | for (i = 0; i < n_changes; i++) { | |
269 | free(changes[i].path); | |
270 | free(changes[i].source); | |
271 | } | |
272 | ||
273 | free(changes); | |
274 | } | |
275 | ||
276 | static int create_symlink( | |
277 | const char *old_path, | |
278 | const char *new_path, | |
279 | bool force, | |
280 | UnitFileChange **changes, | |
281 | unsigned *n_changes) { | |
282 | ||
283 | _cleanup_free_ char *dest = NULL; | |
284 | int r; | |
285 | ||
286 | assert(old_path); | |
287 | assert(new_path); | |
288 | ||
289 | /* Actually create a symlink, and remember that we did. Is | |
290 | * smart enough to check if there's already a valid symlink in | |
291 | * place. */ | |
292 | ||
293 | mkdir_parents_label(new_path, 0755); | |
294 | ||
295 | if (symlink(old_path, new_path) >= 0) { | |
296 | unit_file_changes_add(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path); | |
297 | return 1; | |
298 | } | |
299 | ||
300 | if (errno != EEXIST) | |
301 | return -errno; | |
302 | ||
303 | r = readlink_malloc(new_path, &dest); | |
304 | if (r < 0) | |
305 | return r; | |
306 | ||
307 | if (path_equal(dest, old_path)) | |
308 | return 0; | |
309 | ||
310 | if (!force) | |
311 | return -EEXIST; | |
312 | ||
313 | r = symlink_atomic(old_path, new_path); | |
314 | if (r < 0) | |
315 | return r; | |
316 | ||
317 | unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL); | |
318 | unit_file_changes_add(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path); | |
319 | ||
320 | return 1; | |
321 | } | |
322 | ||
323 | static int mark_symlink_for_removal( | |
324 | Set **remove_symlinks_to, | |
325 | const char *p) { | |
326 | ||
327 | char *n; | |
328 | int r; | |
329 | ||
330 | assert(p); | |
331 | ||
332 | r = set_ensure_allocated(remove_symlinks_to, &string_hash_ops); | |
333 | if (r < 0) | |
334 | return r; | |
335 | ||
336 | n = strdup(p); | |
337 | if (!n) | |
338 | return -ENOMEM; | |
339 | ||
340 | path_kill_slashes(n); | |
341 | ||
342 | r = set_consume(*remove_symlinks_to, n); | |
343 | if (r == -EEXIST) | |
344 | return 0; | |
345 | if (r < 0) | |
346 | return r; | |
347 | ||
348 | return 1; | |
349 | } | |
350 | ||
351 | static int remove_marked_symlinks_fd( | |
352 | Set *remove_symlinks_to, | |
353 | int fd, | |
354 | const char *path, | |
355 | const char *config_path, | |
356 | bool *restart, | |
357 | UnitFileChange **changes, | |
358 | unsigned *n_changes) { | |
359 | ||
360 | _cleanup_closedir_ DIR *d = NULL; | |
361 | struct dirent *de; | |
362 | int r = 0; | |
363 | ||
364 | assert(remove_symlinks_to); | |
365 | assert(fd >= 0); | |
366 | assert(path); | |
367 | assert(config_path); | |
368 | assert(restart); | |
369 | ||
370 | d = fdopendir(fd); | |
371 | if (!d) { | |
372 | safe_close(fd); | |
373 | return -errno; | |
374 | } | |
375 | ||
376 | rewinddir(d); | |
377 | ||
378 | FOREACH_DIRENT(de, d, return -errno) { | |
379 | ||
380 | dirent_ensure_type(d, de); | |
381 | ||
382 | if (de->d_type == DT_DIR) { | |
383 | _cleanup_free_ char *p = NULL; | |
384 | int nfd, q; | |
385 | ||
386 | nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); | |
387 | if (nfd < 0) { | |
388 | if (errno == ENOENT) | |
389 | continue; | |
390 | ||
391 | if (r == 0) | |
392 | r = -errno; | |
393 | continue; | |
394 | } | |
395 | ||
396 | p = path_make_absolute(de->d_name, path); | |
397 | if (!p) { | |
398 | safe_close(nfd); | |
399 | return -ENOMEM; | |
400 | } | |
401 | ||
402 | /* This will close nfd, regardless whether it succeeds or not */ | |
403 | q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, restart, changes, n_changes); | |
404 | if (q < 0 && r == 0) | |
405 | r = q; | |
406 | ||
407 | } else if (de->d_type == DT_LNK) { | |
408 | _cleanup_free_ char *p = NULL, *dest = NULL; | |
409 | bool found; | |
410 | int q; | |
411 | ||
412 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
413 | continue; | |
414 | ||
415 | p = path_make_absolute(de->d_name, path); | |
416 | if (!p) | |
417 | return -ENOMEM; | |
418 | ||
419 | q = readlink_malloc(p, &dest); | |
420 | if (q < 0) { | |
421 | if (q == -ENOENT) | |
422 | continue; | |
423 | ||
424 | if (r == 0) | |
425 | r = q; | |
426 | continue; | |
427 | } | |
428 | ||
429 | /* We remove all links pointing to a file or | |
430 | * path that is marked, as well as all files | |
431 | * sharing the same name as a file that is | |
432 | * marked. */ | |
433 | ||
434 | found = | |
435 | set_contains(remove_symlinks_to, dest) || | |
436 | set_contains(remove_symlinks_to, basename(dest)) || | |
437 | set_contains(remove_symlinks_to, de->d_name); | |
438 | ||
439 | if (!found) | |
440 | continue; | |
441 | ||
442 | if (unlink(p) < 0 && errno != ENOENT) { | |
443 | if (r == 0) | |
444 | r = -errno; | |
445 | continue; | |
446 | } | |
447 | ||
448 | path_kill_slashes(p); | |
449 | (void) rmdir_parents(p, config_path); | |
450 | ||
451 | unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, p, NULL); | |
452 | ||
453 | q = mark_symlink_for_removal(&remove_symlinks_to, p); | |
454 | if (q < 0) | |
455 | return q; | |
456 | if (q > 0) | |
457 | *restart = true; | |
458 | } | |
459 | } | |
460 | ||
461 | return r; | |
462 | } | |
463 | ||
464 | static int remove_marked_symlinks( | |
465 | Set *remove_symlinks_to, | |
466 | const char *config_path, | |
467 | UnitFileChange **changes, | |
468 | unsigned *n_changes) { | |
469 | ||
470 | _cleanup_close_ int fd = -1; | |
471 | bool restart; | |
472 | int r = 0; | |
473 | ||
474 | assert(config_path); | |
475 | ||
476 | if (set_size(remove_symlinks_to) <= 0) | |
477 | return 0; | |
478 | ||
479 | fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); | |
480 | if (fd < 0) | |
481 | return -errno; | |
482 | ||
483 | do { | |
484 | int q, cfd; | |
485 | restart = false; | |
486 | ||
487 | cfd = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
488 | if (cfd < 0) | |
489 | return -errno; | |
490 | ||
491 | /* This takes possession of cfd and closes it */ | |
492 | q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &restart, changes, n_changes); | |
493 | if (r == 0) | |
494 | r = q; | |
495 | } while (restart); | |
496 | ||
497 | return r; | |
498 | } | |
499 | ||
500 | static int find_symlinks_fd( | |
501 | const char *root_dir, | |
502 | const char *name, | |
503 | int fd, | |
504 | const char *path, | |
505 | const char *config_path, | |
506 | bool *same_name_link) { | |
507 | ||
508 | _cleanup_closedir_ DIR *d = NULL; | |
509 | struct dirent *de; | |
510 | int r = 0; | |
511 | ||
512 | assert(name); | |
513 | assert(fd >= 0); | |
514 | assert(path); | |
515 | assert(config_path); | |
516 | assert(same_name_link); | |
517 | ||
518 | d = fdopendir(fd); | |
519 | if (!d) { | |
520 | safe_close(fd); | |
521 | return -errno; | |
522 | } | |
523 | ||
524 | FOREACH_DIRENT(de, d, return -errno) { | |
525 | ||
526 | dirent_ensure_type(d, de); | |
527 | ||
528 | if (de->d_type == DT_DIR) { | |
529 | _cleanup_free_ char *p = NULL; | |
530 | int nfd, q; | |
531 | ||
532 | nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); | |
533 | if (nfd < 0) { | |
534 | if (errno == ENOENT) | |
535 | continue; | |
536 | ||
537 | if (r == 0) | |
538 | r = -errno; | |
539 | continue; | |
540 | } | |
541 | ||
542 | p = path_make_absolute(de->d_name, path); | |
543 | if (!p) { | |
544 | safe_close(nfd); | |
545 | return -ENOMEM; | |
546 | } | |
547 | ||
548 | /* This will close nfd, regardless whether it succeeds or not */ | |
549 | q = find_symlinks_fd(root_dir, name, nfd, p, config_path, same_name_link); | |
550 | if (q > 0) | |
551 | return 1; | |
552 | if (r == 0) | |
553 | r = q; | |
554 | ||
555 | } else if (de->d_type == DT_LNK) { | |
556 | _cleanup_free_ char *p = NULL, *dest = NULL; | |
557 | bool found_path, found_dest, b = false; | |
558 | int q; | |
559 | ||
560 | /* Acquire symlink name */ | |
561 | p = path_make_absolute(de->d_name, path); | |
562 | if (!p) | |
563 | return -ENOMEM; | |
564 | ||
565 | /* Acquire symlink destination */ | |
566 | q = readlink_malloc(p, &dest); | |
567 | if (q == -ENOENT) | |
568 | continue; | |
569 | if (q < 0) { | |
570 | if (r == 0) | |
571 | r = q; | |
572 | continue; | |
573 | } | |
574 | ||
575 | /* Make absolute */ | |
576 | if (!path_is_absolute(dest)) { | |
577 | char *x; | |
578 | ||
579 | x = prefix_root(root_dir, dest); | |
580 | if (!x) | |
581 | return -ENOMEM; | |
582 | ||
583 | free(dest); | |
584 | dest = x; | |
585 | } | |
586 | ||
587 | /* Check if the symlink itself matches what we | |
588 | * are looking for */ | |
589 | if (path_is_absolute(name)) | |
590 | found_path = path_equal(p, name); | |
591 | else | |
592 | found_path = streq(de->d_name, name); | |
593 | ||
594 | /* Check if what the symlink points to | |
595 | * matches what we are looking for */ | |
596 | if (path_is_absolute(name)) | |
597 | found_dest = path_equal(dest, name); | |
598 | else | |
599 | found_dest = streq(basename(dest), name); | |
600 | ||
601 | if (found_path && found_dest) { | |
602 | _cleanup_free_ char *t = NULL; | |
603 | ||
604 | /* Filter out same name links in the main | |
605 | * config path */ | |
606 | t = path_make_absolute(name, config_path); | |
607 | if (!t) | |
608 | return -ENOMEM; | |
609 | ||
610 | b = path_equal(t, p); | |
611 | } | |
612 | ||
613 | if (b) | |
614 | *same_name_link = true; | |
615 | else if (found_path || found_dest) | |
616 | return 1; | |
617 | } | |
618 | } | |
619 | ||
620 | return r; | |
621 | } | |
622 | ||
623 | static int find_symlinks( | |
624 | const char *root_dir, | |
625 | const char *name, | |
626 | const char *config_path, | |
627 | bool *same_name_link) { | |
628 | ||
629 | int fd; | |
630 | ||
631 | assert(name); | |
632 | assert(config_path); | |
633 | assert(same_name_link); | |
634 | ||
635 | fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); | |
636 | if (fd < 0) { | |
637 | if (errno == ENOENT) | |
638 | return 0; | |
639 | return -errno; | |
640 | } | |
641 | ||
642 | /* This takes possession of fd and closes it */ | |
643 | return find_symlinks_fd(root_dir, name, fd, config_path, config_path, same_name_link); | |
644 | } | |
645 | ||
646 | static int find_symlinks_in_scope( | |
647 | UnitFileScope scope, | |
648 | const char *root_dir, | |
649 | const char *name, | |
650 | UnitFileState *state) { | |
651 | ||
652 | _cleanup_free_ char *normal_path = NULL, *runtime_path = NULL; | |
653 | bool same_name_link_runtime = false, same_name_link = false; | |
654 | int r; | |
655 | ||
656 | assert(scope >= 0); | |
657 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
658 | assert(name); | |
659 | ||
660 | /* First look in the normal config path */ | |
661 | r = get_config_path(scope, false, root_dir, &normal_path); | |
662 | if (r < 0) | |
663 | return r; | |
664 | ||
665 | r = find_symlinks(root_dir, name, normal_path, &same_name_link); | |
666 | if (r < 0) | |
667 | return r; | |
668 | if (r > 0) { | |
669 | *state = UNIT_FILE_ENABLED; | |
670 | return r; | |
671 | } | |
672 | ||
673 | /* Then look in runtime config path */ | |
674 | r = get_config_path(scope, true, root_dir, &runtime_path); | |
675 | if (r < 0) | |
676 | return r; | |
677 | ||
678 | r = find_symlinks(root_dir, name, runtime_path, &same_name_link_runtime); | |
679 | if (r < 0) | |
680 | return r; | |
681 | if (r > 0) { | |
682 | *state = UNIT_FILE_ENABLED_RUNTIME; | |
683 | return r; | |
684 | } | |
685 | ||
686 | /* Hmm, we didn't find it, but maybe we found the same name | |
687 | * link? */ | |
688 | if (same_name_link) { | |
689 | *state = UNIT_FILE_LINKED; | |
690 | return 1; | |
691 | } | |
692 | if (same_name_link_runtime) { | |
693 | *state = UNIT_FILE_LINKED_RUNTIME; | |
694 | return 1; | |
695 | } | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static void install_info_free(UnitFileInstallInfo *i) { | |
701 | ||
702 | if (!i) | |
703 | return; | |
704 | ||
705 | free(i->name); | |
706 | free(i->path); | |
707 | strv_free(i->aliases); | |
708 | strv_free(i->wanted_by); | |
709 | strv_free(i->required_by); | |
710 | strv_free(i->also); | |
711 | free(i->default_instance); | |
712 | free(i->symlink_target); | |
713 | free(i); | |
714 | } | |
715 | ||
716 | static OrderedHashmap* install_info_hashmap_free(OrderedHashmap *m) { | |
717 | UnitFileInstallInfo *i; | |
718 | ||
719 | if (!m) | |
720 | return NULL; | |
721 | ||
722 | while ((i = ordered_hashmap_steal_first(m))) | |
723 | install_info_free(i); | |
724 | ||
725 | return ordered_hashmap_free(m); | |
726 | } | |
727 | ||
728 | static void install_context_done(InstallContext *c) { | |
729 | assert(c); | |
730 | ||
731 | c->will_process = install_info_hashmap_free(c->will_process); | |
732 | c->have_processed = install_info_hashmap_free(c->have_processed); | |
733 | } | |
734 | ||
735 | static UnitFileInstallInfo *install_info_find(InstallContext *c, const char *name) { | |
736 | UnitFileInstallInfo *i; | |
737 | ||
738 | i = ordered_hashmap_get(c->have_processed, name); | |
739 | if (i) | |
740 | return i; | |
741 | ||
742 | return ordered_hashmap_get(c->will_process, name); | |
743 | } | |
744 | ||
745 | static int install_info_add( | |
746 | InstallContext *c, | |
747 | const char *name, | |
748 | const char *path, | |
749 | UnitFileInstallInfo **ret) { | |
750 | ||
751 | UnitFileInstallInfo *i = NULL; | |
752 | int r; | |
753 | ||
754 | assert(c); | |
755 | assert(name || path); | |
756 | ||
757 | if (!name) | |
758 | name = basename(path); | |
759 | ||
760 | if (!unit_name_is_valid(name, UNIT_NAME_ANY)) | |
761 | return -EINVAL; | |
762 | ||
763 | i = install_info_find(c, name); | |
764 | if (i) { | |
765 | if (ret) | |
766 | *ret = i; | |
767 | return 0; | |
768 | } | |
769 | ||
770 | r = ordered_hashmap_ensure_allocated(&c->will_process, &string_hash_ops); | |
771 | if (r < 0) | |
772 | return r; | |
773 | ||
774 | i = new0(UnitFileInstallInfo, 1); | |
775 | if (!i) | |
776 | return -ENOMEM; | |
777 | i->type = _UNIT_FILE_TYPE_INVALID; | |
778 | ||
779 | i->name = strdup(name); | |
780 | if (!i->name) { | |
781 | r = -ENOMEM; | |
782 | goto fail; | |
783 | } | |
784 | ||
785 | if (path) { | |
786 | i->path = strdup(path); | |
787 | if (!i->path) { | |
788 | r = -ENOMEM; | |
789 | goto fail; | |
790 | } | |
791 | } | |
792 | ||
793 | r = ordered_hashmap_put(c->will_process, i->name, i); | |
794 | if (r < 0) | |
795 | goto fail; | |
796 | ||
797 | if (ret) | |
798 | *ret = i; | |
799 | ||
800 | return 0; | |
801 | ||
802 | fail: | |
803 | install_info_free(i); | |
804 | return r; | |
805 | } | |
806 | ||
807 | static int install_info_add_auto( | |
808 | InstallContext *c, | |
809 | const char *name_or_path, | |
810 | UnitFileInstallInfo **ret) { | |
811 | ||
812 | assert(c); | |
813 | assert(name_or_path); | |
814 | ||
815 | if (path_is_absolute(name_or_path)) | |
816 | return install_info_add(c, NULL, name_or_path, ret); | |
817 | else | |
818 | return install_info_add(c, name_or_path, NULL, ret); | |
819 | } | |
820 | ||
821 | static int config_parse_also( | |
822 | const char *unit, | |
823 | const char *filename, | |
824 | unsigned line, | |
825 | const char *section, | |
826 | unsigned section_line, | |
827 | const char *lvalue, | |
828 | int ltype, | |
829 | const char *rvalue, | |
830 | void *data, | |
831 | void *userdata) { | |
832 | ||
833 | UnitFileInstallInfo *i = userdata; | |
834 | InstallContext *c = data; | |
835 | int r; | |
836 | ||
837 | assert(filename); | |
838 | assert(lvalue); | |
839 | assert(rvalue); | |
840 | ||
841 | for (;;) { | |
842 | _cleanup_free_ char *word = NULL; | |
843 | ||
844 | r = extract_first_word(&rvalue, &word, NULL, 0); | |
845 | if (r < 0) | |
846 | return r; | |
847 | if (r == 0) | |
848 | break; | |
849 | ||
850 | r = install_info_add(c, word, NULL, NULL); | |
851 | if (r < 0) | |
852 | return r; | |
853 | ||
854 | r = strv_push(&i->also, word); | |
855 | if (r < 0) | |
856 | return r; | |
857 | ||
858 | word = NULL; | |
859 | } | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | static int config_parse_default_instance( | |
865 | const char *unit, | |
866 | const char *filename, | |
867 | unsigned line, | |
868 | const char *section, | |
869 | unsigned section_line, | |
870 | const char *lvalue, | |
871 | int ltype, | |
872 | const char *rvalue, | |
873 | void *data, | |
874 | void *userdata) { | |
875 | ||
876 | UnitFileInstallInfo *i = data; | |
877 | char *printed; | |
878 | int r; | |
879 | ||
880 | assert(filename); | |
881 | assert(lvalue); | |
882 | assert(rvalue); | |
883 | ||
884 | r = install_full_printf(i, rvalue, &printed); | |
885 | if (r < 0) | |
886 | return r; | |
887 | ||
888 | if (!unit_instance_is_valid(printed)) { | |
889 | free(printed); | |
890 | return -EINVAL; | |
891 | } | |
892 | ||
893 | free(i->default_instance); | |
894 | i->default_instance = printed; | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static int unit_file_load( | |
900 | InstallContext *c, | |
901 | UnitFileInstallInfo *info, | |
902 | const char *path, | |
903 | const char *root_dir, | |
904 | SearchFlags flags) { | |
905 | ||
906 | const ConfigTableItem items[] = { | |
907 | { "Install", "Alias", config_parse_strv, 0, &info->aliases }, | |
908 | { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by }, | |
909 | { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by }, | |
910 | { "Install", "DefaultInstance", config_parse_default_instance, 0, info }, | |
911 | { "Install", "Also", config_parse_also, 0, c }, | |
912 | {} | |
913 | }; | |
914 | ||
915 | _cleanup_fclose_ FILE *f = NULL; | |
916 | _cleanup_close_ int fd = -1; | |
917 | struct stat st; | |
918 | int r; | |
919 | ||
920 | assert(c); | |
921 | assert(info); | |
922 | assert(path); | |
923 | ||
924 | path = prefix_roota(root_dir, path); | |
925 | ||
926 | if (!(flags & SEARCH_LOAD)) { | |
927 | r = lstat(path, &st); | |
928 | if (r < 0) | |
929 | return -errno; | |
930 | ||
931 | if (null_or_empty(&st)) | |
932 | info->type = UNIT_FILE_TYPE_MASKED; | |
933 | else if (S_ISREG(st.st_mode)) | |
934 | info->type = UNIT_FILE_TYPE_REGULAR; | |
935 | else if (S_ISLNK(st.st_mode)) | |
936 | return -ELOOP; | |
937 | else if (S_ISDIR(st.st_mode)) | |
938 | return -EISDIR; | |
939 | else | |
940 | return -ENOTTY; | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
945 | fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); | |
946 | if (fd < 0) | |
947 | return -errno; | |
948 | if (fstat(fd, &st) < 0) | |
949 | return -errno; | |
950 | if (null_or_empty(&st)) { | |
951 | info->type = UNIT_FILE_TYPE_MASKED; | |
952 | return 0; | |
953 | } | |
954 | if (S_ISDIR(st.st_mode)) | |
955 | return -EISDIR; | |
956 | if (!S_ISREG(st.st_mode)) | |
957 | return -ENOTTY; | |
958 | ||
959 | f = fdopen(fd, "re"); | |
960 | if (!f) | |
961 | return -errno; | |
962 | fd = -1; | |
963 | ||
964 | r = config_parse(NULL, path, f, | |
965 | NULL, | |
966 | config_item_table_lookup, items, | |
967 | true, true, false, info); | |
968 | if (r < 0) | |
969 | return r; | |
970 | ||
971 | info->type = UNIT_FILE_TYPE_REGULAR; | |
972 | ||
973 | return | |
974 | (int) strv_length(info->aliases) + | |
975 | (int) strv_length(info->wanted_by) + | |
976 | (int) strv_length(info->required_by); | |
977 | } | |
978 | ||
979 | static int unit_file_load_or_readlink( | |
980 | InstallContext *c, | |
981 | UnitFileInstallInfo *info, | |
982 | const char *path, | |
983 | const char *root_dir, | |
984 | SearchFlags flags) { | |
985 | ||
986 | _cleanup_free_ char *np = NULL; | |
987 | int r; | |
988 | ||
989 | r = unit_file_load(c, info, path, root_dir, flags); | |
990 | if (r != -ELOOP) | |
991 | return r; | |
992 | ||
993 | /* This is a symlink, let's read it. */ | |
994 | ||
995 | r = readlink_and_make_absolute_root(root_dir, path, &np); | |
996 | if (r < 0) | |
997 | return r; | |
998 | ||
999 | if (path_equal(np, "/dev/null")) | |
1000 | info->type = UNIT_FILE_TYPE_MASKED; | |
1001 | else { | |
1002 | const char *bn; | |
1003 | UnitType a, b; | |
1004 | ||
1005 | bn = basename(np); | |
1006 | ||
1007 | if (unit_name_is_valid(info->name, UNIT_NAME_PLAIN)) { | |
1008 | ||
1009 | if (!unit_name_is_valid(bn, UNIT_NAME_PLAIN)) | |
1010 | return -EINVAL; | |
1011 | ||
1012 | } else if (unit_name_is_valid(info->name, UNIT_NAME_INSTANCE)) { | |
1013 | ||
1014 | if (!unit_name_is_valid(bn, UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE)) | |
1015 | return -EINVAL; | |
1016 | ||
1017 | } else if (unit_name_is_valid(info->name, UNIT_NAME_TEMPLATE)) { | |
1018 | ||
1019 | if (!unit_name_is_valid(bn, UNIT_NAME_TEMPLATE)) | |
1020 | return -EINVAL; | |
1021 | } else | |
1022 | return -EINVAL; | |
1023 | ||
1024 | /* Enforce that the symlink destination does not | |
1025 | * change the unit file type. */ | |
1026 | ||
1027 | a = unit_name_to_type(info->name); | |
1028 | b = unit_name_to_type(bn); | |
1029 | if (a < 0 || b < 0 || a != b) | |
1030 | return -EINVAL; | |
1031 | ||
1032 | info->type = UNIT_FILE_TYPE_SYMLINK; | |
1033 | info->symlink_target = np; | |
1034 | np = NULL; | |
1035 | } | |
1036 | ||
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | static int unit_file_search( | |
1041 | InstallContext *c, | |
1042 | UnitFileInstallInfo *info, | |
1043 | const LookupPaths *paths, | |
1044 | const char *root_dir, | |
1045 | SearchFlags flags) { | |
1046 | ||
1047 | char **p; | |
1048 | int r; | |
1049 | ||
1050 | assert(c); | |
1051 | assert(info); | |
1052 | assert(paths); | |
1053 | ||
1054 | /* Was this unit already loaded? */ | |
1055 | if (info->type != _UNIT_FILE_TYPE_INVALID) | |
1056 | return 0; | |
1057 | ||
1058 | if (info->path) | |
1059 | return unit_file_load_or_readlink(c, info, info->path, root_dir, flags); | |
1060 | ||
1061 | assert(info->name); | |
1062 | ||
1063 | STRV_FOREACH(p, paths->unit_path) { | |
1064 | _cleanup_free_ char *path = NULL; | |
1065 | ||
1066 | path = strjoin(*p, "/", info->name, NULL); | |
1067 | if (!path) | |
1068 | return -ENOMEM; | |
1069 | ||
1070 | r = unit_file_load_or_readlink(c, info, path, root_dir, flags); | |
1071 | if (r < 0) { | |
1072 | if (r != -ENOENT) | |
1073 | return r; | |
1074 | } else { | |
1075 | info->path = path; | |
1076 | path = NULL; | |
1077 | return r; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | if (unit_name_is_valid(info->name, UNIT_NAME_INSTANCE)) { | |
1082 | ||
1083 | /* Unit file doesn't exist, however instance | |
1084 | * enablement was requested. We will check if it is | |
1085 | * possible to load template unit file. */ | |
1086 | ||
1087 | _cleanup_free_ char *template = NULL; | |
1088 | ||
1089 | r = unit_name_template(info->name, &template); | |
1090 | if (r < 0) | |
1091 | return r; | |
1092 | ||
1093 | STRV_FOREACH(p, paths->unit_path) { | |
1094 | _cleanup_free_ char *path = NULL; | |
1095 | ||
1096 | path = strjoin(*p, "/", template, NULL); | |
1097 | if (!path) | |
1098 | return -ENOMEM; | |
1099 | ||
1100 | r = unit_file_load_or_readlink(c, info, path, root_dir, flags); | |
1101 | if (r < 0) { | |
1102 | if (r != -ENOENT) | |
1103 | return r; | |
1104 | } else { | |
1105 | info->path = path; | |
1106 | path = NULL; | |
1107 | return r; | |
1108 | } | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | return -ENOENT; | |
1113 | } | |
1114 | ||
1115 | static int install_info_follow( | |
1116 | InstallContext *c, | |
1117 | UnitFileInstallInfo *i, | |
1118 | const char *root_dir, | |
1119 | SearchFlags flags) { | |
1120 | ||
1121 | assert(c); | |
1122 | assert(i); | |
1123 | ||
1124 | if (i->type != UNIT_FILE_TYPE_SYMLINK) | |
1125 | return -EINVAL; | |
1126 | if (!i->symlink_target) | |
1127 | return -EINVAL; | |
1128 | ||
1129 | /* If the basename doesn't match, the caller should add a | |
1130 | * complete new entry for this. */ | |
1131 | ||
1132 | if (!streq(basename(i->symlink_target), i->name)) | |
1133 | return -EXDEV; | |
1134 | ||
1135 | free(i->path); | |
1136 | i->path = i->symlink_target; | |
1137 | i->symlink_target = NULL; | |
1138 | i->type = _UNIT_FILE_TYPE_INVALID; | |
1139 | ||
1140 | return unit_file_load_or_readlink(c, i, i->path, root_dir, flags); | |
1141 | } | |
1142 | ||
1143 | static int install_info_traverse( | |
1144 | UnitFileScope scope, | |
1145 | InstallContext *c, | |
1146 | const char *root_dir, | |
1147 | const LookupPaths *paths, | |
1148 | UnitFileInstallInfo *start, | |
1149 | SearchFlags flags, | |
1150 | UnitFileInstallInfo **ret) { | |
1151 | ||
1152 | UnitFileInstallInfo *i; | |
1153 | unsigned k = 0; | |
1154 | int r; | |
1155 | ||
1156 | assert(paths); | |
1157 | assert(start); | |
1158 | assert(c); | |
1159 | ||
1160 | r = unit_file_search(c, start, paths, root_dir, flags); | |
1161 | if (r < 0) | |
1162 | return r; | |
1163 | ||
1164 | i = start; | |
1165 | while (i->type == UNIT_FILE_TYPE_SYMLINK) { | |
1166 | /* Follow the symlink */ | |
1167 | ||
1168 | if (++k > UNIT_FILE_FOLLOW_SYMLINK_MAX) | |
1169 | return -ELOOP; | |
1170 | ||
1171 | if (!(flags & SEARCH_FOLLOW_CONFIG_SYMLINKS) && is_config_path(scope, i->path)) | |
1172 | return -ELOOP; | |
1173 | ||
1174 | r = install_info_follow(c, i, root_dir, flags); | |
1175 | if (r < 0) { | |
1176 | _cleanup_free_ char *buffer = NULL; | |
1177 | const char *bn; | |
1178 | ||
1179 | if (r != -EXDEV) | |
1180 | return r; | |
1181 | ||
1182 | /* Target has a different name, create a new | |
1183 | * install info object for that, and continue | |
1184 | * with that. */ | |
1185 | ||
1186 | bn = basename(i->symlink_target); | |
1187 | ||
1188 | if (unit_name_is_valid(i->name, UNIT_NAME_INSTANCE) && | |
1189 | unit_name_is_valid(bn, UNIT_NAME_TEMPLATE)) { | |
1190 | ||
1191 | _cleanup_free_ char *instance = NULL; | |
1192 | ||
1193 | r = unit_name_to_instance(i->name, &instance); | |
1194 | if (r < 0) | |
1195 | return r; | |
1196 | ||
1197 | r = unit_name_replace_instance(bn, instance, &buffer); | |
1198 | if (r < 0) | |
1199 | return r; | |
1200 | ||
1201 | bn = buffer; | |
1202 | } | |
1203 | ||
1204 | r = install_info_add(c, bn, NULL, &i); | |
1205 | if (r < 0) | |
1206 | return r; | |
1207 | ||
1208 | r = unit_file_search(c, i, paths, root_dir, flags); | |
1209 | if (r < 0) | |
1210 | return r; | |
1211 | } | |
1212 | ||
1213 | /* Try again, with the new target we found. */ | |
1214 | } | |
1215 | ||
1216 | if (ret) | |
1217 | *ret = i; | |
1218 | ||
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | static int install_info_discover( | |
1223 | UnitFileScope scope, | |
1224 | InstallContext *c, | |
1225 | const char *root_dir, | |
1226 | const LookupPaths *paths, | |
1227 | const char *name, | |
1228 | SearchFlags flags, | |
1229 | UnitFileInstallInfo **ret) { | |
1230 | ||
1231 | UnitFileInstallInfo *i; | |
1232 | int r; | |
1233 | ||
1234 | assert(c); | |
1235 | assert(paths); | |
1236 | assert(name); | |
1237 | ||
1238 | r = install_info_add_auto(c, name, &i); | |
1239 | if (r < 0) | |
1240 | return r; | |
1241 | ||
1242 | return install_info_traverse(scope, c, root_dir, paths, i, flags, ret); | |
1243 | } | |
1244 | ||
1245 | static int install_info_symlink_alias( | |
1246 | UnitFileInstallInfo *i, | |
1247 | const char *config_path, | |
1248 | bool force, | |
1249 | UnitFileChange **changes, | |
1250 | unsigned *n_changes) { | |
1251 | ||
1252 | char **s; | |
1253 | int r = 0, q; | |
1254 | ||
1255 | assert(i); | |
1256 | assert(config_path); | |
1257 | ||
1258 | STRV_FOREACH(s, i->aliases) { | |
1259 | _cleanup_free_ char *alias_path = NULL, *dst = NULL; | |
1260 | ||
1261 | q = install_full_printf(i, *s, &dst); | |
1262 | if (q < 0) | |
1263 | return q; | |
1264 | ||
1265 | alias_path = path_make_absolute(dst, config_path); | |
1266 | if (!alias_path) | |
1267 | return -ENOMEM; | |
1268 | ||
1269 | q = create_symlink(i->path, alias_path, force, changes, n_changes); | |
1270 | if (r == 0) | |
1271 | r = q; | |
1272 | } | |
1273 | ||
1274 | return r; | |
1275 | } | |
1276 | ||
1277 | static int install_info_symlink_wants( | |
1278 | UnitFileInstallInfo *i, | |
1279 | const char *config_path, | |
1280 | char **list, | |
1281 | const char *suffix, | |
1282 | bool force, | |
1283 | UnitFileChange **changes, | |
1284 | unsigned *n_changes) { | |
1285 | ||
1286 | _cleanup_free_ char *buf = NULL; | |
1287 | const char *n; | |
1288 | char **s; | |
1289 | int r = 0, q; | |
1290 | ||
1291 | assert(i); | |
1292 | assert(config_path); | |
1293 | ||
1294 | if (unit_name_is_valid(i->name, UNIT_NAME_TEMPLATE)) { | |
1295 | ||
1296 | /* Don't install any symlink if there's no default | |
1297 | * instance configured */ | |
1298 | ||
1299 | if (!i->default_instance) | |
1300 | return 0; | |
1301 | ||
1302 | r = unit_name_replace_instance(i->name, i->default_instance, &buf); | |
1303 | if (r < 0) | |
1304 | return r; | |
1305 | ||
1306 | n = buf; | |
1307 | } else | |
1308 | n = i->name; | |
1309 | ||
1310 | STRV_FOREACH(s, list) { | |
1311 | _cleanup_free_ char *path = NULL, *dst = NULL; | |
1312 | ||
1313 | q = install_full_printf(i, *s, &dst); | |
1314 | if (q < 0) | |
1315 | return q; | |
1316 | ||
1317 | if (!unit_name_is_valid(dst, UNIT_NAME_ANY)) { | |
1318 | r = -EINVAL; | |
1319 | continue; | |
1320 | } | |
1321 | ||
1322 | path = strjoin(config_path, "/", dst, suffix, n, NULL); | |
1323 | if (!path) | |
1324 | return -ENOMEM; | |
1325 | ||
1326 | q = create_symlink(i->path, path, force, changes, n_changes); | |
1327 | if (r == 0) | |
1328 | r = q; | |
1329 | } | |
1330 | ||
1331 | return r; | |
1332 | } | |
1333 | ||
1334 | static int install_info_symlink_link( | |
1335 | UnitFileInstallInfo *i, | |
1336 | const LookupPaths *paths, | |
1337 | const char *config_path, | |
1338 | const char *root_dir, | |
1339 | bool force, | |
1340 | UnitFileChange **changes, | |
1341 | unsigned *n_changes) { | |
1342 | ||
1343 | _cleanup_free_ char *path = NULL; | |
1344 | int r; | |
1345 | ||
1346 | assert(i); | |
1347 | assert(paths); | |
1348 | assert(config_path); | |
1349 | assert(i->path); | |
1350 | ||
1351 | r = in_search_path(i->path, paths->unit_path); | |
1352 | if (r != 0) | |
1353 | return r; | |
1354 | ||
1355 | path = strjoin(config_path, "/", i->name, NULL); | |
1356 | if (!path) | |
1357 | return -ENOMEM; | |
1358 | ||
1359 | return create_symlink(i->path, path, force, changes, n_changes); | |
1360 | } | |
1361 | ||
1362 | static int install_info_apply( | |
1363 | UnitFileInstallInfo *i, | |
1364 | const LookupPaths *paths, | |
1365 | const char *config_path, | |
1366 | const char *root_dir, | |
1367 | bool force, | |
1368 | UnitFileChange **changes, | |
1369 | unsigned *n_changes) { | |
1370 | ||
1371 | int r, q; | |
1372 | ||
1373 | assert(i); | |
1374 | assert(paths); | |
1375 | assert(config_path); | |
1376 | ||
1377 | if (i->type != UNIT_FILE_TYPE_REGULAR) | |
1378 | return 0; | |
1379 | ||
1380 | r = install_info_symlink_alias(i, config_path, force, changes, n_changes); | |
1381 | ||
1382 | q = install_info_symlink_wants(i, config_path, i->wanted_by, ".wants/", force, changes, n_changes); | |
1383 | if (r == 0) | |
1384 | r = q; | |
1385 | ||
1386 | q = install_info_symlink_wants(i, config_path, i->required_by, ".requires/", force, changes, n_changes); | |
1387 | if (r == 0) | |
1388 | r = q; | |
1389 | ||
1390 | q = install_info_symlink_link(i, paths, config_path, root_dir, force, changes, n_changes); | |
1391 | if (r == 0) | |
1392 | r = q; | |
1393 | ||
1394 | return r; | |
1395 | } | |
1396 | ||
1397 | static int install_context_apply( | |
1398 | UnitFileScope scope, | |
1399 | InstallContext *c, | |
1400 | const LookupPaths *paths, | |
1401 | const char *config_path, | |
1402 | const char *root_dir, | |
1403 | bool force, | |
1404 | SearchFlags flags, | |
1405 | UnitFileChange **changes, | |
1406 | unsigned *n_changes) { | |
1407 | ||
1408 | UnitFileInstallInfo *i; | |
1409 | int r; | |
1410 | ||
1411 | assert(c); | |
1412 | assert(paths); | |
1413 | assert(config_path); | |
1414 | ||
1415 | if (ordered_hashmap_isempty(c->will_process)) | |
1416 | return 0; | |
1417 | ||
1418 | r = ordered_hashmap_ensure_allocated(&c->have_processed, &string_hash_ops); | |
1419 | if (r < 0) | |
1420 | return r; | |
1421 | ||
1422 | r = 0; | |
1423 | while ((i = ordered_hashmap_first(c->will_process))) { | |
1424 | int q; | |
1425 | ||
1426 | q = ordered_hashmap_move_one(c->have_processed, c->will_process, i->name); | |
1427 | if (q < 0) | |
1428 | return q; | |
1429 | ||
1430 | r = install_info_traverse(scope, c, root_dir, paths, i, flags, NULL); | |
1431 | if (r < 0) | |
1432 | return r; | |
1433 | ||
1434 | if (i->type != UNIT_FILE_TYPE_REGULAR) | |
1435 | continue; | |
1436 | ||
1437 | q = install_info_apply(i, paths, config_path, root_dir, force, changes, n_changes); | |
1438 | if (r >= 0) { | |
1439 | if (q < 0) | |
1440 | r = q; | |
1441 | else | |
1442 | r+= q; | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | return r; | |
1447 | } | |
1448 | ||
1449 | static int install_context_mark_for_removal( | |
1450 | UnitFileScope scope, | |
1451 | InstallContext *c, | |
1452 | const LookupPaths *paths, | |
1453 | Set **remove_symlinks_to, | |
1454 | const char *config_path, | |
1455 | const char *root_dir) { | |
1456 | ||
1457 | UnitFileInstallInfo *i; | |
1458 | int r; | |
1459 | ||
1460 | assert(c); | |
1461 | assert(paths); | |
1462 | assert(config_path); | |
1463 | ||
1464 | /* Marks all items for removal */ | |
1465 | ||
1466 | if (ordered_hashmap_isempty(c->will_process)) | |
1467 | return 0; | |
1468 | ||
1469 | r = ordered_hashmap_ensure_allocated(&c->have_processed, &string_hash_ops); | |
1470 | if (r < 0) | |
1471 | return r; | |
1472 | ||
1473 | while ((i = ordered_hashmap_first(c->will_process))) { | |
1474 | ||
1475 | r = ordered_hashmap_move_one(c->have_processed, c->will_process, i->name); | |
1476 | if (r < 0) | |
1477 | return r; | |
1478 | ||
1479 | r = install_info_traverse(scope, c, root_dir, paths, i, SEARCH_LOAD|SEARCH_FOLLOW_CONFIG_SYMLINKS, NULL); | |
1480 | if (r < 0) | |
1481 | return r; | |
1482 | ||
1483 | if (i->type != UNIT_FILE_TYPE_REGULAR) | |
1484 | continue; | |
1485 | ||
1486 | r = mark_symlink_for_removal(remove_symlinks_to, i->name); | |
1487 | if (r < 0) | |
1488 | return r; | |
1489 | } | |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | ||
1494 | int unit_file_mask( | |
1495 | UnitFileScope scope, | |
1496 | bool runtime, | |
1497 | const char *root_dir, | |
1498 | char **files, | |
1499 | bool force, | |
1500 | UnitFileChange **changes, | |
1501 | unsigned *n_changes) { | |
1502 | ||
1503 | _cleanup_free_ char *prefix = NULL; | |
1504 | char **i; | |
1505 | int r; | |
1506 | ||
1507 | assert(scope >= 0); | |
1508 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1509 | ||
1510 | r = verify_root_dir(scope, &root_dir); | |
1511 | if (r < 0) | |
1512 | return r; | |
1513 | ||
1514 | r = get_config_path(scope, runtime, root_dir, &prefix); | |
1515 | if (r < 0) | |
1516 | return r; | |
1517 | ||
1518 | STRV_FOREACH(i, files) { | |
1519 | _cleanup_free_ char *path = NULL; | |
1520 | int q; | |
1521 | ||
1522 | if (!unit_name_is_valid(*i, UNIT_NAME_ANY)) { | |
1523 | if (r == 0) | |
1524 | r = -EINVAL; | |
1525 | continue; | |
1526 | } | |
1527 | ||
1528 | path = path_make_absolute(*i, prefix); | |
1529 | if (!path) | |
1530 | return -ENOMEM; | |
1531 | ||
1532 | q = create_symlink("/dev/null", path, force, changes, n_changes); | |
1533 | if (q < 0 && r >= 0) | |
1534 | r = q; | |
1535 | } | |
1536 | ||
1537 | return r; | |
1538 | } | |
1539 | ||
1540 | int unit_file_unmask( | |
1541 | UnitFileScope scope, | |
1542 | bool runtime, | |
1543 | const char *root_dir, | |
1544 | char **files, | |
1545 | UnitFileChange **changes, | |
1546 | unsigned *n_changes) { | |
1547 | ||
1548 | _cleanup_set_free_free_ Set *remove_symlinks_to = NULL; | |
1549 | _cleanup_free_ char *config_path = NULL; | |
1550 | _cleanup_free_ char **todo = NULL; | |
1551 | size_t n_todo = 0, n_allocated = 0; | |
1552 | char **i; | |
1553 | int r, q; | |
1554 | ||
1555 | assert(scope >= 0); | |
1556 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1557 | ||
1558 | r = verify_root_dir(scope, &root_dir); | |
1559 | if (r < 0) | |
1560 | return r; | |
1561 | ||
1562 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
1563 | if (r < 0) | |
1564 | return r; | |
1565 | ||
1566 | STRV_FOREACH(i, files) { | |
1567 | _cleanup_free_ char *path = NULL; | |
1568 | ||
1569 | if (!unit_name_is_valid(*i, UNIT_NAME_ANY)) | |
1570 | return -EINVAL; | |
1571 | ||
1572 | path = path_make_absolute(*i, config_path); | |
1573 | if (!path) | |
1574 | return -ENOMEM; | |
1575 | ||
1576 | r = null_or_empty_path(path); | |
1577 | if (r == -ENOENT) | |
1578 | continue; | |
1579 | if (r < 0) | |
1580 | return r; | |
1581 | if (r == 0) | |
1582 | continue; | |
1583 | ||
1584 | if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2)) | |
1585 | return -ENOMEM; | |
1586 | ||
1587 | todo[n_todo++] = *i; | |
1588 | } | |
1589 | ||
1590 | strv_uniq(todo); | |
1591 | ||
1592 | r = 0; | |
1593 | STRV_FOREACH(i, todo) { | |
1594 | _cleanup_free_ char *path = NULL; | |
1595 | ||
1596 | path = path_make_absolute(*i, config_path); | |
1597 | if (!path) | |
1598 | return -ENOMEM; | |
1599 | ||
1600 | if (unlink(path) < 0) { | |
1601 | if (errno != -ENOENT && r >= 0) | |
1602 | r = -errno; | |
1603 | } else { | |
1604 | q = mark_symlink_for_removal(&remove_symlinks_to, path); | |
1605 | if (q < 0) | |
1606 | return q; | |
1607 | ||
1608 | unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, path, NULL); | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); | |
1613 | if (r >= 0) | |
1614 | r = q; | |
1615 | ||
1616 | return r; | |
1617 | } | |
1618 | ||
1619 | int unit_file_link( | |
1620 | UnitFileScope scope, | |
1621 | bool runtime, | |
1622 | const char *root_dir, | |
1623 | char **files, | |
1624 | bool force, | |
1625 | UnitFileChange **changes, | |
1626 | unsigned *n_changes) { | |
1627 | ||
1628 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
1629 | _cleanup_free_ char *config_path = NULL; | |
1630 | _cleanup_free_ char **todo = NULL; | |
1631 | size_t n_todo = 0, n_allocated = 0; | |
1632 | char **i; | |
1633 | int r, q; | |
1634 | ||
1635 | assert(scope >= 0); | |
1636 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1637 | ||
1638 | r = verify_root_dir(scope, &root_dir); | |
1639 | if (r < 0) | |
1640 | return r; | |
1641 | ||
1642 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
1643 | if (r < 0) | |
1644 | return r; | |
1645 | ||
1646 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
1647 | if (r < 0) | |
1648 | return r; | |
1649 | ||
1650 | STRV_FOREACH(i, files) { | |
1651 | _cleanup_free_ char *full = NULL; | |
1652 | struct stat st; | |
1653 | char *fn; | |
1654 | ||
1655 | if (!path_is_absolute(*i)) | |
1656 | return -EINVAL; | |
1657 | ||
1658 | fn = basename(*i); | |
1659 | if (!unit_name_is_valid(fn, UNIT_NAME_ANY)) | |
1660 | return -EINVAL; | |
1661 | ||
1662 | full = prefix_root(root_dir, *i); | |
1663 | if (!full) | |
1664 | return -ENOMEM; | |
1665 | ||
1666 | if (lstat(full, &st) < 0) | |
1667 | return -errno; | |
1668 | if (S_ISLNK(st.st_mode)) | |
1669 | return -ELOOP; | |
1670 | if (S_ISDIR(st.st_mode)) | |
1671 | return -EISDIR; | |
1672 | if (!S_ISREG(st.st_mode)) | |
1673 | return -ENOTTY; | |
1674 | ||
1675 | q = in_search_path(*i, paths.unit_path); | |
1676 | if (q < 0) | |
1677 | return q; | |
1678 | if (q > 0) | |
1679 | continue; | |
1680 | ||
1681 | if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2)) | |
1682 | return -ENOMEM; | |
1683 | ||
1684 | todo[n_todo++] = *i; | |
1685 | } | |
1686 | ||
1687 | strv_uniq(todo); | |
1688 | ||
1689 | r = 0; | |
1690 | STRV_FOREACH(i, todo) { | |
1691 | _cleanup_free_ char *path = NULL; | |
1692 | ||
1693 | path = path_make_absolute(basename(*i), config_path); | |
1694 | if (!path) | |
1695 | return -ENOMEM; | |
1696 | ||
1697 | q = create_symlink(*i, path, force, changes, n_changes); | |
1698 | if (q < 0 && r >= 0) | |
1699 | r = q; | |
1700 | } | |
1701 | ||
1702 | return r; | |
1703 | } | |
1704 | ||
1705 | int unit_file_add_dependency( | |
1706 | UnitFileScope scope, | |
1707 | bool runtime, | |
1708 | const char *root_dir, | |
1709 | char **files, | |
1710 | const char *target, | |
1711 | UnitDependency dep, | |
1712 | bool force, | |
1713 | UnitFileChange **changes, | |
1714 | unsigned *n_changes) { | |
1715 | ||
1716 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
1717 | _cleanup_(install_context_done) InstallContext c = {}; | |
1718 | _cleanup_free_ char *config_path = NULL; | |
1719 | UnitFileInstallInfo *i, *target_info; | |
1720 | char **f; | |
1721 | int r; | |
1722 | ||
1723 | assert(scope >= 0); | |
1724 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1725 | assert(target); | |
1726 | ||
1727 | if (!IN_SET(dep, UNIT_WANTS, UNIT_REQUIRES)) | |
1728 | return -EINVAL; | |
1729 | ||
1730 | if (!unit_name_is_valid(target, UNIT_NAME_ANY)) | |
1731 | return -EINVAL; | |
1732 | ||
1733 | r = verify_root_dir(scope, &root_dir); | |
1734 | if (r < 0) | |
1735 | return r; | |
1736 | ||
1737 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
1738 | if (r < 0) | |
1739 | return r; | |
1740 | ||
1741 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
1742 | if (r < 0) | |
1743 | return r; | |
1744 | ||
1745 | r = install_info_discover(scope, &c, root_dir, &paths, target, SEARCH_FOLLOW_CONFIG_SYMLINKS, &target_info); | |
1746 | if (r < 0) | |
1747 | return r; | |
1748 | if (target_info->type == UNIT_FILE_TYPE_MASKED) | |
1749 | return -ESHUTDOWN; | |
1750 | ||
1751 | assert(target_info->type == UNIT_FILE_TYPE_REGULAR); | |
1752 | ||
1753 | STRV_FOREACH(f, files) { | |
1754 | char ***l; | |
1755 | ||
1756 | r = install_info_discover(scope, &c, root_dir, &paths, *f, SEARCH_FOLLOW_CONFIG_SYMLINKS, &i); | |
1757 | if (r < 0) | |
1758 | return r; | |
1759 | if (i->type == UNIT_FILE_TYPE_MASKED) | |
1760 | return -ESHUTDOWN; | |
1761 | ||
1762 | assert(i->type == UNIT_FILE_TYPE_REGULAR); | |
1763 | ||
1764 | /* We didn't actually load anything from the unit | |
1765 | * file, but instead just add in our new symlink to | |
1766 | * create. */ | |
1767 | ||
1768 | if (dep == UNIT_WANTS) | |
1769 | l = &i->wanted_by; | |
1770 | else | |
1771 | l = &i->required_by; | |
1772 | ||
1773 | strv_free(*l); | |
1774 | *l = strv_new(target_info->name, NULL); | |
1775 | if (!*l) | |
1776 | return -ENOMEM; | |
1777 | } | |
1778 | ||
1779 | return install_context_apply(scope, &c, &paths, config_path, root_dir, force, SEARCH_FOLLOW_CONFIG_SYMLINKS, changes, n_changes); | |
1780 | } | |
1781 | ||
1782 | int unit_file_enable( | |
1783 | UnitFileScope scope, | |
1784 | bool runtime, | |
1785 | const char *root_dir, | |
1786 | char **files, | |
1787 | bool force, | |
1788 | UnitFileChange **changes, | |
1789 | unsigned *n_changes) { | |
1790 | ||
1791 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
1792 | _cleanup_(install_context_done) InstallContext c = {}; | |
1793 | _cleanup_free_ char *config_path = NULL; | |
1794 | UnitFileInstallInfo *i; | |
1795 | char **f; | |
1796 | int r; | |
1797 | ||
1798 | assert(scope >= 0); | |
1799 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1800 | ||
1801 | r = verify_root_dir(scope, &root_dir); | |
1802 | if (r < 0) | |
1803 | return r; | |
1804 | ||
1805 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
1806 | if (r < 0) | |
1807 | return r; | |
1808 | ||
1809 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
1810 | if (r < 0) | |
1811 | return r; | |
1812 | ||
1813 | STRV_FOREACH(f, files) { | |
1814 | r = install_info_discover(scope, &c, root_dir, &paths, *f, SEARCH_LOAD, &i); | |
1815 | if (r < 0) | |
1816 | return r; | |
1817 | if (i->type == UNIT_FILE_TYPE_MASKED) | |
1818 | return -ESHUTDOWN; | |
1819 | ||
1820 | assert(i->type == UNIT_FILE_TYPE_REGULAR); | |
1821 | } | |
1822 | ||
1823 | /* This will return the number of symlink rules that were | |
1824 | supposed to be created, not the ones actually created. This | |
1825 | is useful to determine whether the passed files had any | |
1826 | installation data at all. */ | |
1827 | ||
1828 | return install_context_apply(scope, &c, &paths, config_path, root_dir, force, SEARCH_LOAD, changes, n_changes); | |
1829 | } | |
1830 | ||
1831 | int unit_file_disable( | |
1832 | UnitFileScope scope, | |
1833 | bool runtime, | |
1834 | const char *root_dir, | |
1835 | char **files, | |
1836 | UnitFileChange **changes, | |
1837 | unsigned *n_changes) { | |
1838 | ||
1839 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
1840 | _cleanup_(install_context_done) InstallContext c = {}; | |
1841 | _cleanup_free_ char *config_path = NULL; | |
1842 | _cleanup_set_free_free_ Set *remove_symlinks_to = NULL; | |
1843 | char **i; | |
1844 | int r; | |
1845 | ||
1846 | assert(scope >= 0); | |
1847 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1848 | ||
1849 | r = verify_root_dir(scope, &root_dir); | |
1850 | if (r < 0) | |
1851 | return r; | |
1852 | ||
1853 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
1854 | if (r < 0) | |
1855 | return r; | |
1856 | ||
1857 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
1858 | if (r < 0) | |
1859 | return r; | |
1860 | ||
1861 | STRV_FOREACH(i, files) { | |
1862 | if (!unit_name_is_valid(*i, UNIT_NAME_ANY)) | |
1863 | return -EINVAL; | |
1864 | ||
1865 | r = install_info_add(&c, *i, NULL, NULL); | |
1866 | if (r < 0) | |
1867 | return r; | |
1868 | } | |
1869 | ||
1870 | r = install_context_mark_for_removal(scope, &c, &paths, &remove_symlinks_to, config_path, root_dir); | |
1871 | if (r < 0) | |
1872 | return r; | |
1873 | ||
1874 | return remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); | |
1875 | } | |
1876 | ||
1877 | int unit_file_reenable( | |
1878 | UnitFileScope scope, | |
1879 | bool runtime, | |
1880 | const char *root_dir, | |
1881 | char **files, | |
1882 | bool force, | |
1883 | UnitFileChange **changes, | |
1884 | unsigned *n_changes) { | |
1885 | ||
1886 | char **n; | |
1887 | int r; | |
1888 | size_t l, i; | |
1889 | ||
1890 | /* First, we invoke the disable command with only the basename... */ | |
1891 | l = strv_length(files); | |
1892 | n = newa(char*, l+1); | |
1893 | for (i = 0; i < l; i++) | |
1894 | n[i] = basename(files[i]); | |
1895 | n[i] = NULL; | |
1896 | ||
1897 | r = unit_file_disable(scope, runtime, root_dir, n, changes, n_changes); | |
1898 | if (r < 0) | |
1899 | return r; | |
1900 | ||
1901 | /* But the enable command with the full name */ | |
1902 | return unit_file_enable(scope, runtime, root_dir, files, force, changes, n_changes); | |
1903 | } | |
1904 | ||
1905 | int unit_file_set_default( | |
1906 | UnitFileScope scope, | |
1907 | const char *root_dir, | |
1908 | const char *name, | |
1909 | bool force, | |
1910 | UnitFileChange **changes, | |
1911 | unsigned *n_changes) { | |
1912 | ||
1913 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
1914 | _cleanup_(install_context_done) InstallContext c = {}; | |
1915 | _cleanup_free_ char *config_path = NULL; | |
1916 | UnitFileInstallInfo *i; | |
1917 | const char *path; | |
1918 | int r; | |
1919 | ||
1920 | assert(scope >= 0); | |
1921 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1922 | assert(name); | |
1923 | ||
1924 | if (unit_name_to_type(name) != UNIT_TARGET) | |
1925 | return -EINVAL; | |
1926 | if (streq(name, SPECIAL_DEFAULT_TARGET)) | |
1927 | return -EINVAL; | |
1928 | ||
1929 | r = verify_root_dir(scope, &root_dir); | |
1930 | if (r < 0) | |
1931 | return r; | |
1932 | ||
1933 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
1934 | if (r < 0) | |
1935 | return r; | |
1936 | ||
1937 | r = get_config_path(scope, false, root_dir, &config_path); | |
1938 | if (r < 0) | |
1939 | return r; | |
1940 | ||
1941 | r = install_info_discover(scope, &c, root_dir, &paths, name, 0, &i); | |
1942 | if (r < 0) | |
1943 | return r; | |
1944 | if (i->type == UNIT_FILE_TYPE_MASKED) | |
1945 | return -ESHUTDOWN; | |
1946 | ||
1947 | path = strjoina(config_path, "/" SPECIAL_DEFAULT_TARGET); | |
1948 | ||
1949 | return create_symlink(i->path, path, force, changes, n_changes); | |
1950 | } | |
1951 | ||
1952 | int unit_file_get_default( | |
1953 | UnitFileScope scope, | |
1954 | const char *root_dir, | |
1955 | char **name) { | |
1956 | ||
1957 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
1958 | _cleanup_(install_context_done) InstallContext c = {}; | |
1959 | UnitFileInstallInfo *i; | |
1960 | char *n; | |
1961 | int r; | |
1962 | ||
1963 | assert(scope >= 0); | |
1964 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
1965 | assert(name); | |
1966 | ||
1967 | r = verify_root_dir(scope, &root_dir); | |
1968 | if (r < 0) | |
1969 | return r; | |
1970 | ||
1971 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
1972 | if (r < 0) | |
1973 | return r; | |
1974 | ||
1975 | r = install_info_discover(scope, &c, root_dir, &paths, SPECIAL_DEFAULT_TARGET, SEARCH_FOLLOW_CONFIG_SYMLINKS, &i); | |
1976 | if (r < 0) | |
1977 | return r; | |
1978 | if (i->type == UNIT_FILE_TYPE_MASKED) | |
1979 | return -ESHUTDOWN; | |
1980 | ||
1981 | n = strdup(i->name); | |
1982 | if (!n) | |
1983 | return -ENOMEM; | |
1984 | ||
1985 | *name = n; | |
1986 | return 0; | |
1987 | } | |
1988 | ||
1989 | int unit_file_lookup_state( | |
1990 | UnitFileScope scope, | |
1991 | const char *root_dir, | |
1992 | const LookupPaths *paths, | |
1993 | const char *name, | |
1994 | UnitFileState *ret) { | |
1995 | ||
1996 | _cleanup_(install_context_done) InstallContext c = {}; | |
1997 | UnitFileInstallInfo *i; | |
1998 | UnitFileState state; | |
1999 | int r; | |
2000 | ||
2001 | assert(paths); | |
2002 | assert(name); | |
2003 | ||
2004 | if (!unit_name_is_valid(name, UNIT_NAME_ANY)) | |
2005 | return -EINVAL; | |
2006 | ||
2007 | r = verify_root_dir(scope, &root_dir); | |
2008 | if (r < 0) | |
2009 | return r; | |
2010 | ||
2011 | r = install_info_discover(scope, &c, root_dir, paths, name, SEARCH_LOAD|SEARCH_FOLLOW_CONFIG_SYMLINKS, &i); | |
2012 | if (r < 0) | |
2013 | return r; | |
2014 | ||
2015 | /* Shortcut things, if the caller just wants to know if this unit exists. */ | |
2016 | if (!ret) | |
2017 | return 0; | |
2018 | ||
2019 | switch (i->type) { | |
2020 | ||
2021 | case UNIT_FILE_TYPE_MASKED: | |
2022 | state = path_startswith(i->path, "/run") ? UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED; | |
2023 | break; | |
2024 | ||
2025 | case UNIT_FILE_TYPE_REGULAR: | |
2026 | r = find_symlinks_in_scope(scope, root_dir, i->name, &state); | |
2027 | if (r < 0) | |
2028 | return r; | |
2029 | if (r == 0) { | |
2030 | if (UNIT_FILE_INSTALL_INFO_HAS_RULES(i)) | |
2031 | state = UNIT_FILE_DISABLED; | |
2032 | else if (UNIT_FILE_INSTALL_INFO_HAS_ALSO(i)) | |
2033 | state = UNIT_FILE_INDIRECT; | |
2034 | else | |
2035 | state = UNIT_FILE_STATIC; | |
2036 | } | |
2037 | ||
2038 | break; | |
2039 | ||
2040 | default: | |
2041 | assert_not_reached("Unexpect unit file type."); | |
2042 | } | |
2043 | ||
2044 | *ret = state; | |
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | int unit_file_get_state( | |
2049 | UnitFileScope scope, | |
2050 | const char *root_dir, | |
2051 | const char *name, | |
2052 | UnitFileState *ret) { | |
2053 | ||
2054 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
2055 | int r; | |
2056 | ||
2057 | assert(scope >= 0); | |
2058 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
2059 | assert(name); | |
2060 | ||
2061 | r = verify_root_dir(scope, &root_dir); | |
2062 | if (r < 0) | |
2063 | return r; | |
2064 | ||
2065 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
2066 | if (r < 0) | |
2067 | return r; | |
2068 | ||
2069 | return unit_file_lookup_state(scope, root_dir, &paths, name, ret); | |
2070 | } | |
2071 | ||
2072 | int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char *name) { | |
2073 | _cleanup_strv_free_ char **files = NULL; | |
2074 | char **p; | |
2075 | int r; | |
2076 | ||
2077 | assert(scope >= 0); | |
2078 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
2079 | assert(name); | |
2080 | ||
2081 | r = verify_root_dir(scope, &root_dir); | |
2082 | if (r < 0) | |
2083 | return r; | |
2084 | ||
2085 | if (!unit_name_is_valid(name, UNIT_NAME_ANY)) | |
2086 | return -EINVAL; | |
2087 | ||
2088 | if (scope == UNIT_FILE_SYSTEM) | |
2089 | r = conf_files_list(&files, ".preset", root_dir, | |
2090 | "/etc/systemd/system-preset", | |
2091 | "/usr/local/lib/systemd/system-preset", | |
2092 | "/usr/lib/systemd/system-preset", | |
2093 | #ifdef HAVE_SPLIT_USR | |
2094 | "/lib/systemd/system-preset", | |
2095 | #endif | |
2096 | NULL); | |
2097 | else if (scope == UNIT_FILE_GLOBAL) | |
2098 | r = conf_files_list(&files, ".preset", root_dir, | |
2099 | "/etc/systemd/user-preset", | |
2100 | "/usr/local/lib/systemd/user-preset", | |
2101 | "/usr/lib/systemd/user-preset", | |
2102 | NULL); | |
2103 | else | |
2104 | return 1; /* Default is "enable" */ | |
2105 | ||
2106 | if (r < 0) | |
2107 | return r; | |
2108 | ||
2109 | STRV_FOREACH(p, files) { | |
2110 | _cleanup_fclose_ FILE *f; | |
2111 | char line[LINE_MAX]; | |
2112 | ||
2113 | f = fopen(*p, "re"); | |
2114 | if (!f) { | |
2115 | if (errno == ENOENT) | |
2116 | continue; | |
2117 | ||
2118 | return -errno; | |
2119 | } | |
2120 | ||
2121 | FOREACH_LINE(line, f, return -errno) { | |
2122 | const char *parameter; | |
2123 | char *l; | |
2124 | ||
2125 | l = strstrip(line); | |
2126 | ||
2127 | if (isempty(l)) | |
2128 | continue; | |
2129 | if (strchr(COMMENTS, *l)) | |
2130 | continue; | |
2131 | ||
2132 | parameter = first_word(l, "enable"); | |
2133 | if (parameter) { | |
2134 | if (fnmatch(parameter, name, FNM_NOESCAPE) == 0) { | |
2135 | log_debug("Preset file says enable %s.", name); | |
2136 | return 1; | |
2137 | } | |
2138 | ||
2139 | continue; | |
2140 | } | |
2141 | ||
2142 | parameter = first_word(l, "disable"); | |
2143 | if (parameter) { | |
2144 | if (fnmatch(parameter, name, FNM_NOESCAPE) == 0) { | |
2145 | log_debug("Preset file says disable %s.", name); | |
2146 | return 0; | |
2147 | } | |
2148 | ||
2149 | continue; | |
2150 | } | |
2151 | ||
2152 | log_debug("Couldn't parse line '%s'", l); | |
2153 | } | |
2154 | } | |
2155 | ||
2156 | /* Default is "enable" */ | |
2157 | log_debug("Preset file doesn't say anything about %s, enabling.", name); | |
2158 | return 1; | |
2159 | } | |
2160 | ||
2161 | static int execute_preset( | |
2162 | UnitFileScope scope, | |
2163 | InstallContext *plus, | |
2164 | InstallContext *minus, | |
2165 | const LookupPaths *paths, | |
2166 | const char *config_path, | |
2167 | const char *root_dir, | |
2168 | char **files, | |
2169 | UnitFilePresetMode mode, | |
2170 | bool force, | |
2171 | UnitFileChange **changes, | |
2172 | unsigned *n_changes) { | |
2173 | ||
2174 | int r; | |
2175 | ||
2176 | assert(plus); | |
2177 | assert(minus); | |
2178 | assert(paths); | |
2179 | assert(config_path); | |
2180 | ||
2181 | if (mode != UNIT_FILE_PRESET_ENABLE_ONLY) { | |
2182 | _cleanup_set_free_free_ Set *remove_symlinks_to = NULL; | |
2183 | ||
2184 | r = install_context_mark_for_removal(scope, minus, paths, &remove_symlinks_to, config_path, root_dir); | |
2185 | if (r < 0) | |
2186 | return r; | |
2187 | ||
2188 | r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); | |
2189 | } else | |
2190 | r = 0; | |
2191 | ||
2192 | if (mode != UNIT_FILE_PRESET_DISABLE_ONLY) { | |
2193 | int q; | |
2194 | ||
2195 | /* Returns number of symlinks that where supposed to be installed. */ | |
2196 | q = install_context_apply(scope, plus, paths, config_path, root_dir, force, SEARCH_LOAD, changes, n_changes); | |
2197 | if (r >= 0) { | |
2198 | if (q < 0) | |
2199 | r = q; | |
2200 | else | |
2201 | r+= q; | |
2202 | } | |
2203 | } | |
2204 | ||
2205 | return r; | |
2206 | } | |
2207 | ||
2208 | static int preset_prepare_one( | |
2209 | UnitFileScope scope, | |
2210 | InstallContext *plus, | |
2211 | InstallContext *minus, | |
2212 | LookupPaths *paths, | |
2213 | const char *root_dir, | |
2214 | UnitFilePresetMode mode, | |
2215 | const char *name) { | |
2216 | ||
2217 | UnitFileInstallInfo *i; | |
2218 | int r; | |
2219 | ||
2220 | if (install_info_find(plus, name) || | |
2221 | install_info_find(minus, name)) | |
2222 | return 0; | |
2223 | ||
2224 | r = unit_file_query_preset(scope, root_dir, name); | |
2225 | if (r < 0) | |
2226 | return r; | |
2227 | ||
2228 | if (r > 0) { | |
2229 | r = install_info_discover(scope, plus, root_dir, paths, name, SEARCH_LOAD|SEARCH_FOLLOW_CONFIG_SYMLINKS, &i); | |
2230 | if (r < 0) | |
2231 | return r; | |
2232 | ||
2233 | if (i->type == UNIT_FILE_TYPE_MASKED) | |
2234 | return -ESHUTDOWN; | |
2235 | } else | |
2236 | r = install_info_discover(scope, minus, root_dir, paths, name, SEARCH_FOLLOW_CONFIG_SYMLINKS, &i); | |
2237 | ||
2238 | return r; | |
2239 | } | |
2240 | ||
2241 | int unit_file_preset( | |
2242 | UnitFileScope scope, | |
2243 | bool runtime, | |
2244 | const char *root_dir, | |
2245 | char **files, | |
2246 | UnitFilePresetMode mode, | |
2247 | bool force, | |
2248 | UnitFileChange **changes, | |
2249 | unsigned *n_changes) { | |
2250 | ||
2251 | _cleanup_(install_context_done) InstallContext plus = {}, minus = {}; | |
2252 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
2253 | _cleanup_free_ char *config_path = NULL; | |
2254 | char **i; | |
2255 | int r; | |
2256 | ||
2257 | assert(scope >= 0); | |
2258 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
2259 | assert(mode < _UNIT_FILE_PRESET_MAX); | |
2260 | ||
2261 | r = verify_root_dir(scope, &root_dir); | |
2262 | if (r < 0) | |
2263 | return r; | |
2264 | ||
2265 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
2266 | if (r < 0) | |
2267 | return r; | |
2268 | ||
2269 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
2270 | if (r < 0) | |
2271 | return r; | |
2272 | ||
2273 | STRV_FOREACH(i, files) { | |
2274 | if (!unit_name_is_valid(*i, UNIT_NAME_ANY)) | |
2275 | return -EINVAL; | |
2276 | ||
2277 | r = preset_prepare_one(scope, &plus, &minus, &paths, root_dir, mode, *i); | |
2278 | if (r < 0) | |
2279 | return r; | |
2280 | } | |
2281 | ||
2282 | return execute_preset(scope, &plus, &minus, &paths, config_path, root_dir, files, mode, force, changes, n_changes); | |
2283 | } | |
2284 | ||
2285 | int unit_file_preset_all( | |
2286 | UnitFileScope scope, | |
2287 | bool runtime, | |
2288 | const char *root_dir, | |
2289 | UnitFilePresetMode mode, | |
2290 | bool force, | |
2291 | UnitFileChange **changes, | |
2292 | unsigned *n_changes) { | |
2293 | ||
2294 | _cleanup_(install_context_done) InstallContext plus = {}, minus = {}; | |
2295 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
2296 | _cleanup_free_ char *config_path = NULL; | |
2297 | char **i; | |
2298 | int r; | |
2299 | ||
2300 | assert(scope >= 0); | |
2301 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
2302 | assert(mode < _UNIT_FILE_PRESET_MAX); | |
2303 | ||
2304 | r = verify_root_dir(scope, &root_dir); | |
2305 | if (r < 0) | |
2306 | return r; | |
2307 | ||
2308 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
2309 | if (r < 0) | |
2310 | return r; | |
2311 | ||
2312 | r = get_config_path(scope, runtime, root_dir, &config_path); | |
2313 | if (r < 0) | |
2314 | return r; | |
2315 | ||
2316 | STRV_FOREACH(i, paths.unit_path) { | |
2317 | _cleanup_closedir_ DIR *d = NULL; | |
2318 | _cleanup_free_ char *units_dir; | |
2319 | struct dirent *de; | |
2320 | ||
2321 | units_dir = path_join(root_dir, *i, NULL); | |
2322 | if (!units_dir) | |
2323 | return -ENOMEM; | |
2324 | ||
2325 | d = opendir(units_dir); | |
2326 | if (!d) { | |
2327 | if (errno == ENOENT) | |
2328 | continue; | |
2329 | ||
2330 | return -errno; | |
2331 | } | |
2332 | ||
2333 | FOREACH_DIRENT(de, d, return -errno) { | |
2334 | ||
2335 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
2336 | continue; | |
2337 | ||
2338 | dirent_ensure_type(d, de); | |
2339 | ||
2340 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
2341 | continue; | |
2342 | ||
2343 | r = preset_prepare_one(scope, &plus, &minus, &paths, root_dir, mode, de->d_name); | |
2344 | if (r < 0) | |
2345 | return r; | |
2346 | } | |
2347 | } | |
2348 | ||
2349 | return execute_preset(scope, &plus, &minus, &paths, config_path, root_dir, NULL, mode, force, changes, n_changes); | |
2350 | } | |
2351 | ||
2352 | static void unit_file_list_free_one(UnitFileList *f) { | |
2353 | if (!f) | |
2354 | return; | |
2355 | ||
2356 | free(f->path); | |
2357 | free(f); | |
2358 | } | |
2359 | ||
2360 | Hashmap* unit_file_list_free(Hashmap *h) { | |
2361 | UnitFileList *i; | |
2362 | ||
2363 | while ((i = hashmap_steal_first(h))) | |
2364 | unit_file_list_free_one(i); | |
2365 | ||
2366 | return hashmap_free(h); | |
2367 | } | |
2368 | ||
2369 | DEFINE_TRIVIAL_CLEANUP_FUNC(UnitFileList*, unit_file_list_free_one); | |
2370 | ||
2371 | int unit_file_get_list( | |
2372 | UnitFileScope scope, | |
2373 | const char *root_dir, | |
2374 | Hashmap *h) { | |
2375 | ||
2376 | _cleanup_lookup_paths_free_ LookupPaths paths = {}; | |
2377 | char **i; | |
2378 | int r; | |
2379 | ||
2380 | assert(scope >= 0); | |
2381 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
2382 | assert(h); | |
2383 | ||
2384 | r = verify_root_dir(scope, &root_dir); | |
2385 | if (r < 0) | |
2386 | return r; | |
2387 | ||
2388 | r = lookup_paths_init_from_scope(&paths, scope, root_dir); | |
2389 | if (r < 0) | |
2390 | return r; | |
2391 | ||
2392 | STRV_FOREACH(i, paths.unit_path) { | |
2393 | _cleanup_closedir_ DIR *d = NULL; | |
2394 | _cleanup_free_ char *units_dir; | |
2395 | struct dirent *de; | |
2396 | ||
2397 | units_dir = path_join(root_dir, *i, NULL); | |
2398 | if (!units_dir) | |
2399 | return -ENOMEM; | |
2400 | ||
2401 | d = opendir(units_dir); | |
2402 | if (!d) { | |
2403 | if (errno == ENOENT) | |
2404 | continue; | |
2405 | ||
2406 | return -errno; | |
2407 | } | |
2408 | ||
2409 | FOREACH_DIRENT(de, d, return -errno) { | |
2410 | _cleanup_(unit_file_list_free_onep) UnitFileList *f = NULL; | |
2411 | ||
2412 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
2413 | continue; | |
2414 | ||
2415 | if (hashmap_get(h, de->d_name)) | |
2416 | continue; | |
2417 | ||
2418 | dirent_ensure_type(d, de); | |
2419 | ||
2420 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
2421 | continue; | |
2422 | ||
2423 | f = new0(UnitFileList, 1); | |
2424 | if (!f) | |
2425 | return -ENOMEM; | |
2426 | ||
2427 | f->path = path_make_absolute(de->d_name, units_dir); | |
2428 | if (!f->path) | |
2429 | return -ENOMEM; | |
2430 | ||
2431 | r = unit_file_lookup_state(scope, root_dir, &paths, basename(f->path), &f->state); | |
2432 | if (r < 0) | |
2433 | f->state = UNIT_FILE_BAD; | |
2434 | ||
2435 | r = hashmap_put(h, basename(f->path), f); | |
2436 | if (r < 0) | |
2437 | return r; | |
2438 | ||
2439 | f = NULL; /* prevent cleanup */ | |
2440 | } | |
2441 | } | |
2442 | ||
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = { | |
2447 | [UNIT_FILE_ENABLED] = "enabled", | |
2448 | [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtime", | |
2449 | [UNIT_FILE_LINKED] = "linked", | |
2450 | [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime", | |
2451 | [UNIT_FILE_MASKED] = "masked", | |
2452 | [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime", | |
2453 | [UNIT_FILE_STATIC] = "static", | |
2454 | [UNIT_FILE_DISABLED] = "disabled", | |
2455 | [UNIT_FILE_INDIRECT] = "indirect", | |
2456 | [UNIT_FILE_BAD] = "bad", | |
2457 | }; | |
2458 | ||
2459 | DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState); | |
2460 | ||
2461 | static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = { | |
2462 | [UNIT_FILE_SYMLINK] = "symlink", | |
2463 | [UNIT_FILE_UNLINK] = "unlink", | |
2464 | }; | |
2465 | ||
2466 | DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType); | |
2467 | ||
2468 | static const char* const unit_file_preset_mode_table[_UNIT_FILE_PRESET_MAX] = { | |
2469 | [UNIT_FILE_PRESET_FULL] = "full", | |
2470 | [UNIT_FILE_PRESET_ENABLE_ONLY] = "enable-only", | |
2471 | [UNIT_FILE_PRESET_DISABLE_ONLY] = "disable-only", | |
2472 | }; | |
2473 | ||
2474 | DEFINE_STRING_TABLE_LOOKUP(unit_file_preset_mode, UnitFilePresetMode); |