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Add set_consume which always takes ownership
[thirdparty/systemd.git] / src / shared / install.c
CommitLineData
83096483
LP		 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3/***
4 This file is part of systemd.
5
6 Copyright 2011 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
5430f7f2
LP		 9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
83096483
LP		 11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty <of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5430f7f2 16 Lesser General Public License for more details.
83096483 17
5430f7f2 18 You should have received a copy of the GNU Lesser General Public License
83096483
LP		 19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
22#include <errno.h>
23#include <fcntl.h>
24#include <unistd.h>
25#include <string.h>
26#include <fnmatch.h>
27
28#include "util.h"
49e942b2 29#include "mkdir.h"
83096483
LP		 30#include "hashmap.h"
31#include "set.h"
9eb977db 32#include "path-util.h"
83096483
LP		 33#include "path-lookup.h"
34#include "strv.h"
35#include "unit-name.h"
36#include "install.h"
37#include "conf-parser.h"
2c21044f 38#include "conf-files.h"
7584d236
ZJS		 39#include "specifier.h"
40#include "install-printf.h"
83096483
LP		 41
42typedef struct {
43 Hashmap *will_install;
44 Hashmap *have_installed;
45} InstallContext;
46
d9e5e694
ZJS		 47#define _cleanup_lookup_paths_free_ \
48 __attribute__((cleanup(lookup_paths_free)))
49#define _cleanup_install_context_done_ \
50 __attribute__((cleanup(install_context_done)))
51
83096483
LP		 52static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) {
53 assert(paths);
54 assert(scope >= 0);
55 assert(scope < _UNIT_FILE_SCOPE_MAX);
56
57 zero(*paths);
58
59 return lookup_paths_init(paths,
67445f4e 60 scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
07719a21
LP		 61 scope == UNIT_FILE_USER,
62 NULL, NULL, NULL);
83096483
LP		 63}
64
65static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
66 char *p = NULL;
67 int r;
68
69 assert(scope >= 0);
70 assert(scope < _UNIT_FILE_SCOPE_MAX);
71 assert(ret);
72
73 switch (scope) {
74
75 case UNIT_FILE_SYSTEM:
76
77 if (root_dir && runtime)
d380a3bc
BN		 78 asprintf(&p, "%s/run/systemd/system", root_dir);
79 else if (runtime)
83096483
LP		 80 p = strdup("/run/systemd/system");
81 else if (root_dir)
82 asprintf(&p, "%s/%s", root_dir, SYSTEM_CONFIG_UNIT_PATH);
83 else
84 p = strdup(SYSTEM_CONFIG_UNIT_PATH);
85
86 break;
87
88 case UNIT_FILE_GLOBAL:
89
90 if (root_dir)
91 return -EINVAL;
92
93 if (runtime)
94 p = strdup("/run/systemd/user");
95 else
96 p = strdup(USER_CONFIG_UNIT_PATH);
97 break;
98
99 case UNIT_FILE_USER:
100
101 if (root_dir || runtime)
102 return -EINVAL;
103
104 r = user_config_home(&p);
105 if (r <= 0)
106 return r < 0 ? r : -ENOENT;
107
108 break;
109
110 default:
111 assert_not_reached("Bad scope");
112 }
113
114 if (!p)
115 return -ENOMEM;
116
117 *ret = p;
118 return 0;
119}
120
121static int add_file_change(
122 UnitFileChange **changes,
123 unsigned *n_changes,
124 UnitFileChangeType type,
125 const char *path,
126 const char *source) {
127
128 UnitFileChange *c;
129 unsigned i;
130
83096483
LP		 131 assert(path);
132 assert(!changes == !n_changes);
133
134 if (!changes)
135 return 0;
136
137 c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange));
138 if (!c)
139 return -ENOMEM;
140
141 *changes = c;
142 i = *n_changes;
143
144 c[i].type = type;
145 c[i].path = strdup(path);
146 if (!c[i].path)
147 return -ENOMEM;
148
149 if (source) {
150 c[i].source = strdup(source);
151 if (!c[i].source) {
152 free(c[i].path);
153 return -ENOMEM;
154 }
155 } else
156 c[i].source = NULL;
157
158 *n_changes = i+1;
159 return 0;
160}
161
162static int mark_symlink_for_removal(
163 Set **remove_symlinks_to,
164 const char *p) {
165
166 char *n;
167 int r;
168
169 assert(p);
170
171 r = set_ensure_allocated(remove_symlinks_to, string_hash_func, string_compare_func);
172 if (r < 0)
173 return r;
174
175 n = strdup(p);
176 if (!n)
177 return -ENOMEM;
178
179 path_kill_slashes(n);
180
ef42202a
ZJS		 181 r = set_consume(*remove_symlinks_to, n);
182 if (r < 0)
83096483 183 return r == -EEXIST ? 0 : r;
83096483
LP		 184
185 return 0;
186}
187
188static int remove_marked_symlinks_fd(
189 Set *remove_symlinks_to,
190 int fd,
191 const char *path,
192 const char *config_path,
193 bool *deleted,
194 UnitFileChange **changes,
29283ea4
MS		 195 unsigned *n_changes,
196 char** files) {
83096483
LP		 197
198 int r = 0;
7fd1b19b 199 _cleanup_closedir_ DIR *d = NULL;
83096483
LP		 200
201 assert(remove_symlinks_to);
202 assert(fd >= 0);
203 assert(path);
204 assert(config_path);
205 assert(deleted);
206
207 d = fdopendir(fd);
208 if (!d) {
209 close_nointr_nofail(fd);
210 return -errno;
211 }
212
213 rewinddir(d);
214
215 for (;;) {
7d5e9c0f
LP		 216 struct dirent *de;
217 union dirent_storage buf;
83096483
LP		 218 int k;
219
7d5e9c0f 220 k = readdir_r(d, &buf.de, &de);
83096483
LP		 221 if (k != 0) {
222 r = -errno;
223 break;
224 }
225
226 if (!de)
227 break;
228
229 if (ignore_file(de->d_name))
230 continue;
231
232 dirent_ensure_type(d, de);
233
234 if (de->d_type == DT_DIR) {
235 int nfd, q;
7fd1b19b 236 _cleanup_free_ char *p = NULL;
83096483
LP		 237
238 nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
239 if (nfd < 0) {
240 if (errno == ENOENT)
241 continue;
242
243 if (r == 0)
244 r = -errno;
245 continue;
246 }
247
248 p = path_make_absolute(de->d_name, path);
249 if (!p) {
250 close_nointr_nofail(nfd);
d9e5e694 251 return -ENOMEM;
83096483
LP		 252 }
253
254 /* This will close nfd, regardless whether it succeeds or not */
29283ea4 255 q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes, files);
83096483
LP		 256
257 if (r == 0)
258 r = q;
259
260 } else if (de->d_type == DT_LNK) {
7fd1b19b 261 _cleanup_free_ char *p = NULL, *dest = NULL;
83096483
LP		 262 int q;
263 bool found;
264
265 p = path_make_absolute(de->d_name, path);
d9e5e694
ZJS		 266 if (!p)
267 return -ENOMEM;
83096483
LP		 268
269 q = readlink_and_canonicalize(p, &dest);
270 if (q < 0) {
83096483
LP		 271 if (q == -ENOENT)
272 continue;
273
274 if (r == 0)
275 r = q;
276 continue;
277 }
278
279 found =
280 set_get(remove_symlinks_to, dest) ||
9eb977db 281 set_get(remove_symlinks_to, path_get_file_name(dest));
83096483 282
29283ea4
MS		 283 if (unit_name_is_instance(p))
284 found = found && strv_contains(files, path_get_file_name(p));
285
83096483
LP		 286 if (found) {
287
288 if (unlink(p) < 0 && errno != ENOENT) {
289
290 if (r == 0)
291 r = -errno;
292 } else {
293 rmdir_parents(p, config_path);
294 path_kill_slashes(p);
295
296 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, p, NULL);
297
298 if (!set_get(remove_symlinks_to, p)) {
299
300 q = mark_symlink_for_removal(&remove_symlinks_to, p);
301 if (q < 0) {
302 if (r == 0)
303 r = q;
304 } else
305 *deleted = true;
306 }
307 }
308 }
83096483
LP		 309 }
310 }
311
83096483
LP		 312 return r;
313}
314
315static int remove_marked_symlinks(
316 Set *remove_symlinks_to,
317 const char *config_path,
318 UnitFileChange **changes,
29283ea4
MS		 319 unsigned *n_changes,
320 char** files) {
83096483
LP		 321
322 int fd, r = 0;
323 bool deleted;
324
325 assert(config_path);
326
327 if (set_size(remove_symlinks_to) <= 0)
328 return 0;
329
330 fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
331 if (fd < 0)
332 return -errno;
333
334 do {
335 int q, cfd;
336 deleted = false;
337
338 cfd = dup(fd);
339 if (cfd < 0) {
340 r = -errno;
341 break;
342 }
343
344 /* This takes possession of cfd and closes it */
29283ea4 345 q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes, files);
83096483
LP		 346 if (r == 0)
347 r = q;
348 } while (deleted);
349
350 close_nointr_nofail(fd);
351
352 return r;
353}
354
355static int find_symlinks_fd(
356 const char *name,
357 int fd,
358 const char *path,
359 const char *config_path,
360 bool *same_name_link) {
361
362 int r = 0;
7fd1b19b 363 _cleanup_closedir_ DIR *d = NULL;
83096483
LP		 364
365 assert(name);
366 assert(fd >= 0);
367 assert(path);
368 assert(config_path);
369 assert(same_name_link);
370
371 d = fdopendir(fd);
372 if (!d) {
373 close_nointr_nofail(fd);
374 return -errno;
375 }
376
377 for (;;) {
378 int k;
7d5e9c0f
LP		 379 struct dirent *de;
380 union dirent_storage buf;
83096483 381
7d5e9c0f 382 k = readdir_r(d, &buf.de, &de);
ea55addc
ZJS		 383 if (k != 0)
384 return -errno;
83096483
LP		 385
386 if (!de)
ea55addc 387 return r;
83096483
LP		 388
389 if (ignore_file(de->d_name))
390 continue;
391
392 dirent_ensure_type(d, de);
393
394 if (de->d_type == DT_DIR) {
395 int nfd, q;
7fd1b19b 396 _cleanup_free_ char *p = NULL;
83096483
LP		 397
398 nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
399 if (nfd < 0) {
400 if (errno == ENOENT)
401 continue;
402
403 if (r == 0)
404 r = -errno;
405 continue;
406 }
407
408 p = path_make_absolute(de->d_name, path);
409 if (!p) {
410 close_nointr_nofail(nfd);
ea55addc 411 return -ENOMEM;
83096483
LP		 412 }
413
414 /* This will close nfd, regardless whether it succeeds or not */
415 q = find_symlinks_fd(name, nfd, p, config_path, same_name_link);
83096483 416
ea55addc
ZJS		 417 if (q > 0)
418 return 1;
83096483
LP		 419
420 if (r == 0)
421 r = q;
422
423 } else if (de->d_type == DT_LNK) {
7fd1b19b 424 _cleanup_free_ char *p = NULL, *dest = NULL;
83096483
LP		 425 bool found_path, found_dest, b = false;
426 int q;
427
428 /* Acquire symlink name */
429 p = path_make_absolute(de->d_name, path);
ea55addc
ZJS		 430 if (!p)
431 return -ENOMEM;
83096483
LP		 432
433 /* Acquire symlink destination */
434 q = readlink_and_canonicalize(p, &dest);
435 if (q < 0) {
83096483
LP		 436 if (q == -ENOENT)
437 continue;
438
439 if (r == 0)
440 r = q;
441 continue;
442 }
443
444 /* Check if the symlink itself matches what we
445 * are looking for */
446 if (path_is_absolute(name))
447 found_path = path_equal(p, name);
448 else
449 found_path = streq(de->d_name, name);
450
451 /* Check if what the symlink points to
452 * matches what we are looking for */
453 if (path_is_absolute(name))
454 found_dest = path_equal(dest, name);
455 else
9eb977db 456 found_dest = streq(path_get_file_name(dest), name);
83096483 457
83096483 458 if (found_path && found_dest) {
7fd1b19b 459 _cleanup_free_ char *t = NULL;
83096483
LP		 460
461 /* Filter out same name links in the main
462 * config path */
463 t = path_make_absolute(name, config_path);
ea55addc
ZJS		 464 if (!t)
465 return -ENOMEM;
83096483
LP		 466
467 b = path_equal(t, p);
83096483
LP		 468 }
469
83096483
LP		 470 if (b)
471 *same_name_link = true;
ea55addc
ZJS		 472 else if (found_path || found_dest)
473 return 1;
83096483
LP		 474 }
475 }
476
83096483
LP		 477 return r;
478}
479
480static int find_symlinks(
481 const char *name,
482 const char *config_path,
483 bool *same_name_link) {
484
485 int fd;
486
487 assert(name);
488 assert(config_path);
489 assert(same_name_link);
490
491 fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
d5891fda
ZJS		 492 if (fd < 0) {
493 if (errno == ENOENT)
494 return 0;
83096483 495 return -errno;
d5891fda 496 }
83096483
LP		 497
498 /* This takes possession of fd and closes it */
499 return find_symlinks_fd(name, fd, config_path, config_path, same_name_link);
500}
501
502static int find_symlinks_in_scope(
503 UnitFileScope scope,
504 const char *root_dir,
505 const char *name,
506 UnitFileState *state) {
507
508 int r;
7fd1b19b 509 _cleanup_free_ char *path = NULL;
83096483
LP		 510 bool same_name_link_runtime = false, same_name_link = false;
511
512 assert(scope >= 0);
513 assert(scope < _UNIT_FILE_SCOPE_MAX);
514 assert(name);
515
516 if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) {
517
518 /* First look in runtime config path */
519 r = get_config_path(scope, true, root_dir, &path);
520 if (r < 0)
521 return r;
522
523 r = find_symlinks(name, path, &same_name_link_runtime);
83096483
LP		 524 if (r < 0)
525 return r;
526 else if (r > 0) {
527 *state = UNIT_FILE_ENABLED_RUNTIME;
528 return r;
529 }
530 }
531
532 /* Then look in the normal config path */
533 r = get_config_path(scope, false, root_dir, &path);
534 if (r < 0)
535 return r;
536
537 r = find_symlinks(name, path, &same_name_link);
83096483
LP		 538 if (r < 0)
539 return r;
540 else if (r > 0) {
541 *state = UNIT_FILE_ENABLED;
542 return r;
543 }
544
545 /* Hmm, we didn't find it, but maybe we found the same name
546 * link? */
547 if (same_name_link_runtime) {
548 *state = UNIT_FILE_LINKED_RUNTIME;
549 return 1;
550 } else if (same_name_link) {
551 *state = UNIT_FILE_LINKED;
552 return 1;
553 }
554
555 return 0;
556}
557
558int unit_file_mask(
559 UnitFileScope scope,
560 bool runtime,
561 const char *root_dir,
562 char *files[],
563 bool force,
564 UnitFileChange **changes,
565 unsigned *n_changes) {
566
d8831ed5 567 char **i;
7fd1b19b 568 _cleanup_free_ char *prefix;
83096483
LP		 569 int r;
570
571 assert(scope >= 0);
572 assert(scope < _UNIT_FILE_SCOPE_MAX);
573
574 r = get_config_path(scope, runtime, root_dir, &prefix);
575 if (r < 0)
576 return r;
577
578 STRV_FOREACH(i, files) {
7fd1b19b 579 _cleanup_free_ char *path = NULL;
83096483 580
5f739699 581 if (!unit_name_is_valid(*i, true)) {
83096483
LP		 582 if (r == 0)
583 r = -EINVAL;
584 continue;
585 }
586
587 path = path_make_absolute(*i, prefix);
588 if (!path) {
589 r = -ENOMEM;
590 break;
591 }
592
593 if (symlink("/dev/null", path) >= 0) {
594 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
595
83096483
LP		 596 continue;
597 }
598
599 if (errno == EEXIST) {
600
d8831ed5 601 if (null_or_empty_path(path) > 0)
83096483 602 continue;
83096483
LP		 603
604 if (force) {
605 unlink(path);
606
607 if (symlink("/dev/null", path) >= 0) {
608
609 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
610 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
611
83096483
LP		 612 continue;
613 }
614 }
615
616 if (r == 0)
617 r = -EEXIST;
618 } else {
619 if (r == 0)
620 r = -errno;
621 }
83096483
LP		 622 }
623
83096483
LP		 624 return r;
625}
626
627int unit_file_unmask(
628 UnitFileScope scope,
629 bool runtime,
630 const char *root_dir,
631 char *files[],
632 UnitFileChange **changes,
633 unsigned *n_changes) {
634
635 char **i, *config_path = NULL;
636 int r, q;
637 Set *remove_symlinks_to = NULL;
638
639 assert(scope >= 0);
640 assert(scope < _UNIT_FILE_SCOPE_MAX);
641
642 r = get_config_path(scope, runtime, root_dir, &config_path);
643 if (r < 0)
644 goto finish;
645
646 STRV_FOREACH(i, files) {
647 char *path;
648
5f739699 649 if (!unit_name_is_valid(*i, true)) {
83096483
LP		 650 if (r == 0)
651 r = -EINVAL;
652 continue;
653 }
654
655 path = path_make_absolute(*i, config_path);
656 if (!path) {
657 r = -ENOMEM;
658 break;
659 }
660
661 q = null_or_empty_path(path);
662 if (q > 0) {
663 if (unlink(path) >= 0) {
664 mark_symlink_for_removal(&remove_symlinks_to, path);
665 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
666
667 free(path);
668 continue;
669 }
670
671 q = -errno;
672 }
673
674 if (q != -ENOENT && r == 0)
675 r = q;
676
677 free(path);
678 }
679
680
681finish:
29283ea4 682 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
83096483
LP		 683 if (r == 0)
684 r = q;
685
686 set_free_free(remove_symlinks_to);
687 free(config_path);
688
689 return r;
690}
691
692int unit_file_link(
693 UnitFileScope scope,
694 bool runtime,
695 const char *root_dir,
696 char *files[],
697 bool force,
698 UnitFileChange **changes,
699 unsigned *n_changes) {
700
7fd1b19b 701 _cleanup_lookup_paths_free_ LookupPaths paths = {};
d9e5e694 702 char **i;
7fd1b19b 703 _cleanup_free_ char *config_path = NULL;
83096483
LP		 704 int r, q;
705
706 assert(scope >= 0);
707 assert(scope < _UNIT_FILE_SCOPE_MAX);
708
83096483
LP		 709 r = lookup_paths_init_from_scope(&paths, scope);
710 if (r < 0)
711 return r;
712
713 r = get_config_path(scope, runtime, root_dir, &config_path);
714 if (r < 0)
d9e5e694 715 return r;
83096483
LP		 716
717 STRV_FOREACH(i, files) {
7fd1b19b 718 _cleanup_free_ char *path = NULL;
d9e5e694 719 char *fn;
83096483
LP		 720 struct stat st;
721
9eb977db 722 fn = path_get_file_name(*i);
83096483
LP		 723
724 if (!path_is_absolute(*i) ||
5f739699 725 !unit_name_is_valid(fn, true)) {
83096483
LP		 726 if (r == 0)
727 r = -EINVAL;
728 continue;
729 }
730
731 if (lstat(*i, &st) < 0) {
732 if (r == 0)
733 r = -errno;
734 continue;
735 }
736
737 if (!S_ISREG(st.st_mode)) {
738 r = -ENOENT;
739 continue;
740 }
741
742 q = in_search_path(*i, paths.unit_path);
d9e5e694
ZJS		 743 if (q < 0)
744 return q;
83096483
LP		 745
746 if (q > 0)
747 continue;
748
749 path = path_make_absolute(fn, config_path);
d9e5e694
ZJS		 750 if (!path)
751 return -ENOMEM;
83096483
LP		 752
753 if (symlink(*i, path) >= 0) {
754 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
83096483
LP		 755 continue;
756 }
757
758 if (errno == EEXIST) {
7fd1b19b 759 _cleanup_free_ char *dest = NULL;
83096483
LP		 760
761 q = readlink_and_make_absolute(path, &dest);
762
763 if (q < 0 && errno != ENOENT) {
83096483
LP		 764 if (r == 0)
765 r = q;
83096483
LP		 766 continue;
767 }
768
d9e5e694 769 if (q >= 0 && path_equal(dest, *i))
83096483 770 continue;
83096483
LP		 771
772 if (force) {
773 unlink(path);
774
775 if (symlink(*i, path) >= 0) {
776
777 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
778 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
779
83096483
LP		 780 continue;
781 }
782 }
783
784 if (r == 0)
785 r = -EEXIST;
786 } else {
787 if (r == 0)
788 r = -errno;
789 }
83096483
LP		 790 }
791
83096483
LP		 792 return r;
793}
794
795void unit_file_list_free(Hashmap *h) {
796 UnitFileList *i;
797
798 while ((i = hashmap_steal_first(h))) {
799 free(i->path);
800 free(i);
801 }
802
803 hashmap_free(h);
804}
805
806void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) {
807 unsigned i;
808
809 assert(changes || n_changes == 0);
810
811 if (!changes)
812 return;
813
814 for (i = 0; i < n_changes; i++) {
815 free(changes[i].path);
816 free(changes[i].source);
817 }
818
819 free(changes);
820}
821
822static void install_info_free(InstallInfo *i) {
823 assert(i);
824
825 free(i->name);
826 free(i->path);
827 strv_free(i->aliases);
828 strv_free(i->wanted_by);
78d54bd4 829 strv_free(i->required_by);
83096483
LP		 830 free(i);
831}
832
833static void install_info_hashmap_free(Hashmap *m) {
834 InstallInfo *i;
835
836 if (!m)
837 return;
838
839 while ((i = hashmap_steal_first(m)))
840 install_info_free(i);
841
842 hashmap_free(m);
843}
844
845static void install_context_done(InstallContext *c) {
846 assert(c);
847
848 install_info_hashmap_free(c->will_install);
849 install_info_hashmap_free(c->have_installed);
850
851 c->will_install = c->have_installed = NULL;
852}
853
854static int install_info_add(
855 InstallContext *c,
856 const char *name,
857 const char *path) {
858 InstallInfo *i = NULL;
859 int r;
860
861 assert(c);
862 assert(name || path);
863
864 if (!name)
9eb977db 865 name = path_get_file_name(path);
83096483 866
5f739699 867 if (!unit_name_is_valid(name, true))
83096483
LP		 868 return -EINVAL;
869
870 if (hashmap_get(c->have_installed, name) ||
871 hashmap_get(c->will_install, name))
872 return 0;
873
874 r = hashmap_ensure_allocated(&c->will_install, string_hash_func, string_compare_func);
875 if (r < 0)
876 return r;
877
878 i = new0(InstallInfo, 1);
879 if (!i)
880 return -ENOMEM;
881
882 i->name = strdup(name);
883 if (!i->name) {
884 r = -ENOMEM;
885 goto fail;
886 }
887
888 if (path) {
889 i->path = strdup(path);
890 if (!i->path) {
891 r = -ENOMEM;
892 goto fail;
893 }
894 }
895
896 r = hashmap_put(c->will_install, i->name, i);
897 if (r < 0)
898 goto fail;
899
900 return 0;
901
902fail:
903 if (i)
904 install_info_free(i);
905
906 return r;
907}
908
909static int install_info_add_auto(
910 InstallContext *c,
911 const char *name_or_path) {
912
913 assert(c);
914 assert(name_or_path);
915
916 if (path_is_absolute(name_or_path))
917 return install_info_add(c, NULL, name_or_path);
918 else
919 return install_info_add(c, name_or_path, NULL);
920}
921
e8e581bf
ZJS		 922static int config_parse_also(const char *unit,
923 const char *filename,
924 unsigned line,
925 const char *section,
926 const char *lvalue,
927 int ltype,
928 const char *rvalue,
929 void *data,
930 void *userdata) {
83096483
LP		 931
932 char *w;
933 size_t l;
934 char *state;
935 InstallContext *c = data;
936
937 assert(filename);
938 assert(lvalue);
939 assert(rvalue);
940
941 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
7fd1b19b 942 _cleanup_free_ char *n;
83096483
LP		 943 int r;
944
945 n = strndup(w, l);
946 if (!n)
947 return -ENOMEM;
948
949 r = install_info_add(c, n, NULL);
d9e5e694 950 if (r < 0)
83096483 951 return r;
83096483
LP		 952 }
953
954 return 0;
955}
956
e8e581bf
ZJS		 957static int config_parse_user(const char *unit,
958 const char *filename,
959 unsigned line,
960 const char *section,
961 const char *lvalue,
962 int ltype,
963 const char *rvalue,
964 void *data,
965 void *userdata) {
3f0b2f0f
ZJS		 966
967 InstallInfo *i = data;
968 char* printed;
969
970 assert(filename);
971 assert(lvalue);
972 assert(rvalue);
973
974 printed = install_full_printf(i, rvalue);
975 if (!printed)
976 return -ENOMEM;
977
978 free(i->user);
979 i->user = printed;
980
981 return 0;
982}
983
83096483
LP		 984static int unit_file_load(
985 InstallContext *c,
986 InstallInfo *info,
987 const char *path,
988 bool allow_symlink) {
989
f975e971 990 const ConfigTableItem items[] = {
78d54bd4
LP		 991 { "Install", "Alias", config_parse_strv, 0, &info->aliases },
992 { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
993 { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
994 { "Install", "Also", config_parse_also, 0, c },
3f0b2f0f 995 { "Exec", "User", config_parse_user, 0, info },
f975e971 996 { NULL, NULL, NULL, 0, NULL }
83096483
LP		 997 };
998
999 int fd;
7fd1b19b 1000 _cleanup_fclose_ FILE *f = NULL;
83096483
LP		 1001 int r;
1002
1003 assert(c);
1004 assert(info);
1005 assert(path);
1006
1007 fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|(allow_symlink ? 0 : O_NOFOLLOW));
1008 if (fd < 0)
1009 return -errno;
1010
1011 f = fdopen(fd, "re");
1012 if (!f) {
1013 close_nointr_nofail(fd);
1014 return -ENOMEM;
1015 }
1016
e8e581bf
ZJS		 1017 r = config_parse(NULL, path, f, NULL,
1018 config_item_table_lookup, (void*) items, true, info);
83096483
LP		 1019 if (r < 0)
1020 return r;
1021
78d54bd4
LP		 1022 return
1023 strv_length(info->aliases) +
1024 strv_length(info->wanted_by) +
1025 strv_length(info->required_by);
83096483
LP		 1026}
1027
1028static int unit_file_search(
1029 InstallContext *c,
1030 InstallInfo *info,
1031 LookupPaths *paths,
1032 const char *root_dir,
1033 bool allow_symlink) {
1034
1035 char **p;
1036 int r;
1037
1038 assert(c);
1039 assert(info);
1040 assert(paths);
1041
1042 if (info->path)
1043 return unit_file_load(c, info, info->path, allow_symlink);
1044
1045 assert(info->name);
1046
1047 STRV_FOREACH(p, paths->unit_path) {
1048 char *path = NULL;
1049
1050 if (isempty(root_dir))
1051 asprintf(&path, "%s/%s", *p, info->name);
1052 else
1053 asprintf(&path, "%s/%s/%s", root_dir, *p, info->name);
1054
1055 if (!path)
1056 return -ENOMEM;
1057
1058 r = unit_file_load(c, info, path, allow_symlink);
1059
1060 if (r >= 0)
1061 info->path = path;
29283ea4
MS		 1062 else {
1063 if (r == -ENOENT && unit_name_is_instance(info->name)) {
1064 /* unit file doesn't exist, however instance enablement was request */
1065 /* we will check if it is possible to load template unit file */
1066 char *template = NULL,
1067 *template_path = NULL,
1068 *template_dir = NULL;
1069
1070 template = unit_name_template(info->name);
1071 if (!template) {
1072 free(path);
1073 return -ENOMEM;
1074 }
1075
1076 /* we will reuse path variable since we don't need it anymore */
1077 template_dir = path;
1078 *(strrchr(path, '/') + 1) = '\0';
1079
1080 template_path = strjoin(template_dir, template, NULL);
1081 if (!template_path) {
1082 free(path);
1083 free(template);
1084 return -ENOMEM;
1085 }
1086
1087 /* let's try to load template unit */
1088 r = unit_file_load(c, info, template_path, allow_symlink);
1089 if (r >= 0) {
1090 info->path = strdup(template_path);
1091 if (!info->path) {
1092 free(path);
1093 free(template);
1094 free(template_path);
1095 return -ENOMEM;
1096 }
1097 }
1098
1099 free(template);
1100 free(template_path);
1101 }
83096483 1102 free(path);
29283ea4 1103 }
83096483
LP		 1104
1105 if (r != -ENOENT && r != -ELOOP)
1106 return r;
1107 }
1108
1109 return -ENOENT;
1110}
1111
1112static int unit_file_can_install(
1113 LookupPaths *paths,
1114 const char *root_dir,
1115 const char *name,
1116 bool allow_symlink) {
1117
7fd1b19b 1118 _cleanup_install_context_done_ InstallContext c = {};
83096483
LP		 1119 InstallInfo *i;
1120 int r;
1121
1122 assert(paths);
1123 assert(name);
1124
83096483
LP		 1125 r = install_info_add_auto(&c, name);
1126 if (r < 0)
1127 return r;
1128
1129 assert_se(i = hashmap_first(c.will_install));
1130
1131 r = unit_file_search(&c, i, paths, root_dir, allow_symlink);
1132
1133 if (r >= 0)
78d54bd4
LP		 1134 r =
1135 strv_length(i->aliases) +
1136 strv_length(i->wanted_by) +
1137 strv_length(i->required_by);
83096483 1138
83096483
LP		 1139 return r;
1140}
1141
1142static int create_symlink(
1143 const char *old_path,
1144 const char *new_path,
1145 bool force,
1146 UnitFileChange **changes,
1147 unsigned *n_changes) {
1148
7fd1b19b 1149 _cleanup_free_ char *dest = NULL;
83096483
LP		 1150 int r;
1151
1152 assert(old_path);
1153 assert(new_path);
1154
d2e54fae 1155 mkdir_parents_label(new_path, 0755);
83096483
LP		 1156
1157 if (symlink(old_path, new_path) >= 0) {
1158 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
1159 return 0;
1160 }
1161
1162 if (errno != EEXIST)
1163 return -errno;
1164
1165 r = readlink_and_make_absolute(new_path, &dest);
1166 if (r < 0)
1167 return r;
1168
d9e5e694 1169 if (path_equal(dest, old_path))
83096483 1170 return 0;
83096483 1171
ba49b4a1 1172 if (!force)
83096483
LP		 1173 return -EEXIST;
1174
1175 unlink(new_path);
1176
1177 if (symlink(old_path, new_path) >= 0) {
1178 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL);
1179 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
1180 return 0;
1181 }
1182
1183 return -errno;
1184}
1185
1186static int install_info_symlink_alias(
1187 InstallInfo *i,
1188 const char *config_path,
1189 bool force,
1190 UnitFileChange **changes,
1191 unsigned *n_changes) {
1192
1193 char **s;
1194 int r = 0, q;
1195
1196 assert(i);
1197 assert(config_path);
1198
1199 STRV_FOREACH(s, i->aliases) {
7fd1b19b 1200 _cleanup_free_ char *alias_path = NULL, *dst = NULL;
83096483 1201
7584d236
ZJS		 1202 dst = install_full_printf(i, *s);
1203 if (!dst)
1204 return -ENOMEM;
83096483 1205
7584d236 1206 alias_path = path_make_absolute(dst, config_path);
83096483
LP		 1207 if (!alias_path)
1208 return -ENOMEM;
1209
1210 q = create_symlink(i->path, alias_path, force, changes, n_changes);
83096483
LP		 1211 if (r == 0)
1212 r = q;
1213 }
1214
1215 return r;
1216}
1217
1218static int install_info_symlink_wants(
1219 InstallInfo *i,
1220 const char *config_path,
1221 bool force,
1222 UnitFileChange **changes,
1223 unsigned *n_changes) {
1224
1225 char **s;
1226 int r = 0, q;
1227
1228 assert(i);
1229 assert(config_path);
1230
1231 STRV_FOREACH(s, i->wanted_by) {
7fd1b19b 1232 _cleanup_free_ char *path = NULL, *dst = NULL;
83096483 1233
7584d236
ZJS		 1234 dst = install_full_printf(i, *s);
1235 if (!dst)
1236 return -ENOMEM;
1237
1238 if (!unit_name_is_valid(dst, true)) {
83096483
LP		 1239 r = -EINVAL;
1240 continue;
1241 }
1242
7584d236 1243 if (asprintf(&path, "%s/%s.wants/%s", config_path, dst, i->name) < 0)
83096483
LP		 1244 return -ENOMEM;
1245
1246 q = create_symlink(i->path, path, force, changes, n_changes);
83096483
LP		 1247
1248 if (r == 0)
1249 r = q;
1250 }
1251
1252 return r;
1253}
1254
78d54bd4
LP		 1255static int install_info_symlink_requires(
1256 InstallInfo *i,
1257 const char *config_path,
1258 bool force,
1259 UnitFileChange **changes,
1260 unsigned *n_changes) {
1261
1262 char **s;
1263 int r = 0, q;
1264
1265 assert(i);
1266 assert(config_path);
1267
1268 STRV_FOREACH(s, i->required_by) {
7fd1b19b 1269 _cleanup_free_ char *path = NULL, *dst = NULL;
78d54bd4 1270
7584d236
ZJS		 1271 dst = install_full_printf(i, *s);
1272 if (!dst)
1273 return -ENOMEM;
1274
1275 if (!unit_name_is_valid(dst, true)) {
78d54bd4
LP		 1276 r = -EINVAL;
1277 continue;
1278 }
1279
7584d236 1280 if (asprintf(&path, "%s/%s.requires/%s", config_path, dst, i->name) < 0)
78d54bd4
LP		 1281 return -ENOMEM;
1282
1283 q = create_symlink(i->path, path, force, changes, n_changes);
78d54bd4
LP		 1284
1285 if (r == 0)
1286 r = q;
1287 }
1288
1289 return r;
1290}
1291
83096483
LP		 1292static int install_info_symlink_link(
1293 InstallInfo *i,
1294 LookupPaths *paths,
1295 const char *config_path,
1296 bool force,
1297 UnitFileChange **changes,
1298 unsigned *n_changes) {
1299
1300 int r;
7fd1b19b 1301 _cleanup_free_ char *path = NULL;
83096483
LP		 1302
1303 assert(i);
1304 assert(paths);
1305 assert(config_path);
1306 assert(i->path);
1307
1308 r = in_search_path(i->path, paths->unit_path);
1309 if (r != 0)
1310 return r;
1311
1312 if (asprintf(&path, "%s/%s", config_path, i->name) < 0)
1313 return -ENOMEM;
1314
1315 r = create_symlink(i->path, path, force, changes, n_changes);
83096483
LP		 1316 return r;
1317}
1318
1319static int install_info_apply(
1320 InstallInfo *i,
1321 LookupPaths *paths,
1322 const char *config_path,
1323 bool force,
1324 UnitFileChange **changes,
1325 unsigned *n_changes) {
1326
1327 int r, q;
1328
1329 assert(i);
1330 assert(paths);
1331 assert(config_path);
1332
1333 r = install_info_symlink_alias(i, config_path, force, changes, n_changes);
1334
1335 q = install_info_symlink_wants(i, config_path, force, changes, n_changes);
1336 if (r == 0)
1337 r = q;
1338
78d54bd4
LP		 1339 q = install_info_symlink_requires(i, config_path, force, changes, n_changes);
1340 if (r == 0)
1341 r = q;
1342
83096483
LP		 1343 q = install_info_symlink_link(i, paths, config_path, force, changes, n_changes);
1344 if (r == 0)
1345 r = q;
1346
1347 return r;
1348}
1349
1350static int install_context_apply(
1351 InstallContext *c,
1352 LookupPaths *paths,
1353 const char *config_path,
1354 const char *root_dir,
1355 bool force,
1356 UnitFileChange **changes,
1357 unsigned *n_changes) {
1358
1359 InstallInfo *i;
1360 int r = 0, q;
1361
1362 assert(c);
1363 assert(paths);
1364 assert(config_path);
1365
1366 while ((i = hashmap_first(c->will_install))) {
1367
1368 q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
1369 if (q < 0)
1370 return q;
1371
1372 assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
1373
1374 q = unit_file_search(c, i, paths, root_dir, false);
1375 if (q < 0) {
1376 if (r >= 0)
1377 r = q;
1378
1379 return r;
1380 } else if (r >= 0)
1381 r += q;
1382
1383 q = install_info_apply(i, paths, config_path, force, changes, n_changes);
1384 if (r >= 0 && q < 0)
1385 r = q;
1386 }
1387
1388 return r;
1389}
1390
1391static int install_context_mark_for_removal(
1392 InstallContext *c,
1393 LookupPaths *paths,
1394 Set **remove_symlinks_to,
1395 const char *config_path,
1396 const char *root_dir) {
1397
1398 InstallInfo *i;
1399 int r = 0, q;
1400
1401 assert(c);
1402 assert(paths);
1403 assert(config_path);
1404
1405 /* Marks all items for removal */
1406
1407 while ((i = hashmap_first(c->will_install))) {
1408
1409 q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
1410 if (q < 0)
1411 return q;
1412
1413 assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
1414
1415 q = unit_file_search(c, i, paths, root_dir, false);
1416 if (q < 0) {
1417 if (r >= 0)
1418 r = q;
1419
1420 return r;
1421 } else if (r >= 0)
1422 r += q;
1423
29283ea4
MS		 1424 if (unit_name_is_instance(i->name)) {
1425 char *unit_file = NULL;
1426
1427 unit_file = path_get_file_name(i->path);
1428
1429 if (unit_name_is_instance(unit_file))
1430 /* unit file named as instance exists, thus all symlinks pointing to it, will be removed */
1431 q = mark_symlink_for_removal(remove_symlinks_to, i->name);
1432 else
1433 /* does not exist, thus we will mark for removal symlinks to template unit file */
1434 q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
1435 } else
1436 q = mark_symlink_for_removal(remove_symlinks_to, i->name);
1437
83096483
LP		 1438 if (r >= 0 && q < 0)
1439 r = q;
1440 }
1441
1442 return r;
1443}
1444
1445int unit_file_enable(
1446 UnitFileScope scope,
1447 bool runtime,
1448 const char *root_dir,
1449 char *files[],
1450 bool force,
1451 UnitFileChange **changes,
1452 unsigned *n_changes) {
1453
7fd1b19b
HH		 1454 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1455 _cleanup_install_context_done_ InstallContext c = {};
d9e5e694 1456 char **i;
7fd1b19b 1457 _cleanup_free_ char *config_path = NULL;
83096483
LP		 1458 int r;
1459
1460 assert(scope >= 0);
1461 assert(scope < _UNIT_FILE_SCOPE_MAX);
1462
83096483
LP		 1463 r = lookup_paths_init_from_scope(&paths, scope);
1464 if (r < 0)
1465 return r;
1466
1467 r = get_config_path(scope, runtime, root_dir, &config_path);
1468 if (r < 0)
d9e5e694 1469 return r;
83096483
LP		 1470
1471 STRV_FOREACH(i, files) {
1472 r = install_info_add_auto(&c, *i);
1473 if (r < 0)
d9e5e694 1474 return r;
83096483
LP		 1475 }
1476
729e3769
LP		 1477 /* This will return the number of symlink rules that were
1478 supposed to be created, not the ones actually created. This is
20f59e42 1479 useful to determine whether the passed files had any
729e3769 1480 installation data at all. */
83096483 1481 r = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
83096483
LP		 1482 return r;
1483}
1484
1485int unit_file_disable(
1486 UnitFileScope scope,
1487 bool runtime,
1488 const char *root_dir,
1489 char *files[],
1490 UnitFileChange **changes,
1491 unsigned *n_changes) {
1492
7fd1b19b
HH		 1493 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1494 _cleanup_install_context_done_ InstallContext c = {};
d9e5e694 1495 char **i;
7fd1b19b
HH		 1496 _cleanup_free_ char *config_path = NULL;
1497 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
83096483
LP		 1498 int r, q;
1499
1500 assert(scope >= 0);
1501 assert(scope < _UNIT_FILE_SCOPE_MAX);
1502
83096483
LP		 1503 r = lookup_paths_init_from_scope(&paths, scope);
1504 if (r < 0)
1505 return r;
1506
1507 r = get_config_path(scope, runtime, root_dir, &config_path);
1508 if (r < 0)
d9e5e694 1509 return r;
83096483
LP		 1510
1511 STRV_FOREACH(i, files) {
1512 r = install_info_add_auto(&c, *i);
1513 if (r < 0)
d9e5e694 1514 return r;
83096483
LP		 1515 }
1516
1517 r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir);
1518
29283ea4 1519 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
83096483 1520 if (r == 0)
034a2a52 1521 r = q;
83096483 1522
83096483
LP		 1523 return r;
1524}
1525
1526int unit_file_reenable(
1527 UnitFileScope scope,
1528 bool runtime,
1529 const char *root_dir,
1530 char *files[],
1531 bool force,
1532 UnitFileChange **changes,
1533 unsigned *n_changes) {
1534
7fd1b19b
HH		 1535 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1536 _cleanup_install_context_done_ InstallContext c = {};
d9e5e694 1537 char **i;
7fd1b19b
HH		 1538 _cleanup_free_ char *config_path = NULL;
1539 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
83096483
LP		 1540 int r, q;
1541
1542 assert(scope >= 0);
1543 assert(scope < _UNIT_FILE_SCOPE_MAX);
1544
83096483
LP		 1545 r = lookup_paths_init_from_scope(&paths, scope);
1546 if (r < 0)
1547 return r;
1548
1549 r = get_config_path(scope, runtime, root_dir, &config_path);
1550 if (r < 0)
d9e5e694 1551 return r;
83096483
LP		 1552
1553 STRV_FOREACH(i, files) {
1554 r = mark_symlink_for_removal(&remove_symlinks_to, *i);
1555 if (r < 0)
d9e5e694 1556 return r;
83096483
LP		 1557
1558 r = install_info_add_auto(&c, *i);
1559 if (r < 0)
d9e5e694 1560 return r;
83096483
LP		 1561 }
1562
29283ea4 1563 r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
83096483 1564
729e3769 1565 /* Returns number of symlinks that where supposed to be installed. */
83096483
LP		 1566 q = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
1567 if (r == 0)
1568 r = q;
1569
83096483
LP		 1570 return r;
1571}
1572
1573UnitFileState unit_file_get_state(
1574 UnitFileScope scope,
1575 const char *root_dir,
1576 const char *name) {
1577
7fd1b19b 1578 _cleanup_lookup_paths_free_ LookupPaths paths = {};
83096483 1579 UnitFileState state = _UNIT_FILE_STATE_INVALID;
d9e5e694 1580 char **i;
7fd1b19b 1581 _cleanup_free_ char *path = NULL;
83096483
LP		 1582 int r;
1583
1584 assert(scope >= 0);
1585 assert(scope < _UNIT_FILE_SCOPE_MAX);
1586 assert(name);
1587
83096483
LP		 1588 if (root_dir && scope != UNIT_FILE_SYSTEM)
1589 return -EINVAL;
1590
5f739699 1591 if (!unit_name_is_valid(name, true))
83096483
LP		 1592 return -EINVAL;
1593
1594 r = lookup_paths_init_from_scope(&paths, scope);
1595 if (r < 0)
1596 return r;
1597
1598 STRV_FOREACH(i, paths.unit_path) {
1599 struct stat st;
1600
1601 free(path);
1602 path = NULL;
1603
1604 if (root_dir)
1605 asprintf(&path, "%s/%s/%s", root_dir, *i, name);
1606 else
1607 asprintf(&path, "%s/%s", *i, name);
1608
d9e5e694
ZJS		 1609 if (!path)
1610 return -ENOMEM;
83096483
LP		 1611
1612 if (lstat(path, &st) < 0) {
81006b8a 1613 r = -errno;
83096483
LP		 1614 if (errno == ENOENT)
1615 continue;
1616
d9e5e694 1617 return -errno;
83096483
LP		 1618 }
1619
d9e5e694
ZJS		 1620 if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
1621 return -ENOENT;
83096483
LP		 1622
1623 r = null_or_empty_path(path);
1624 if (r < 0 && r != -ENOENT)
d9e5e694 1625 return r;
83096483
LP		 1626 else if (r > 0) {
1627 state = path_startswith(*i, "/run") ?
1628 UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
d9e5e694 1629 return state;
83096483
LP		 1630 }
1631
1632 r = find_symlinks_in_scope(scope, root_dir, name, &state);
d9e5e694
ZJS		 1633 if (r < 0)
1634 return r;
1635 else if (r > 0)
1636 return state;
83096483
LP		 1637
1638 r = unit_file_can_install(&paths, root_dir, path, true);
bcb161b0 1639 if (r < 0 && errno != ENOENT)
d9e5e694
ZJS		 1640 return r;
1641 else if (r > 0)
1642 return UNIT_FILE_DISABLED;
1643 else if (r == 0)
1644 return UNIT_FILE_STATIC;
83096483
LP		 1645 }
1646
83096483
LP		 1647 return r < 0 ? r : state;
1648}
1649
1650int unit_file_query_preset(UnitFileScope scope, const char *name) {
7fd1b19b 1651 _cleanup_strv_free_ char **files = NULL;
d9e5e694 1652 char **i;
83096483
LP		 1653 int r;
1654
1655 assert(scope >= 0);
1656 assert(scope < _UNIT_FILE_SCOPE_MAX);
1657 assert(name);
1658
1659 if (scope == UNIT_FILE_SYSTEM)
7850b3b8 1660 r = conf_files_list(&files, ".preset", NULL,
a7480dba
LP		 1661 "/etc/systemd/system-preset",
1662 "/usr/local/lib/systemd/system-preset",
1663 "/usr/lib/systemd/system-preset",
b4bdfefa 1664#ifdef HAVE_SPLIT_USR
a7480dba 1665 "/lib/systemd/system-preset",
b4bdfefa 1666#endif
83096483
LP		 1667 NULL);
1668 else if (scope == UNIT_FILE_GLOBAL)
7850b3b8 1669 r = conf_files_list(&files, ".preset", NULL,
a7480dba
LP		 1670 "/etc/systemd/user-preset",
1671 "/usr/local/lib/systemd/user-preset",
1672 "/usr/lib/systemd/user-preset",
83096483
LP		 1673 NULL);
1674 else
1675 return 1;
1676
1677 if (r < 0)
1678 return r;
1679
1680 STRV_FOREACH(i, files) {
7fd1b19b 1681 _cleanup_fclose_ FILE *f;
83096483
LP		 1682
1683 f = fopen(*i, "re");
1684 if (!f) {
1685 if (errno == ENOENT)
1686 continue;
1687
d9e5e694 1688 return -errno;
83096483
LP		 1689 }
1690
1691 for (;;) {
1692 char line[LINE_MAX], *l;
1693
1694 if (!fgets(line, sizeof(line), f))
1695 break;
1696
1697 l = strstrip(line);
1698 if (!*l)
1699 continue;
1700
d3b6d0c2 1701 if (strchr(COMMENTS "\n", *l))
83096483
LP		 1702 continue;
1703
1704 if (first_word(l, "enable")) {
1705 l += 6;
1706 l += strspn(l, WHITESPACE);
1707
d9e5e694
ZJS		 1708 if (fnmatch(l, name, FNM_NOESCAPE) == 0)
1709 return 1;
1710
83096483
LP		 1711 } else if (first_word(l, "disable")) {
1712 l += 7;
1713 l += strspn(l, WHITESPACE);
1714
d9e5e694
ZJS		 1715 if (fnmatch(l, name, FNM_NOESCAPE) == 0)
1716 return 0;
1717
83096483
LP		 1718 } else
1719 log_debug("Couldn't parse line '%s'", l);
1720 }
83096483
LP		 1721 }
1722
1723 /* Default is "enable" */
d9e5e694 1724 return 1;
83096483
LP		 1725}
1726
1727int unit_file_preset(
1728 UnitFileScope scope,
1729 bool runtime,
1730 const char *root_dir,
1731 char *files[],
1732 bool force,
1733 UnitFileChange **changes,
1734 unsigned *n_changes) {
1735
7fd1b19b
HH		 1736 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1737 _cleanup_install_context_done_ InstallContext plus = {}, minus = {};
d9e5e694 1738 char **i;
7fd1b19b
HH		 1739 _cleanup_free_ char *config_path = NULL;
1740 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
83096483
LP		 1741 int r, q;
1742
1743 assert(scope >= 0);
1744 assert(scope < _UNIT_FILE_SCOPE_MAX);
1745
83096483
LP		 1746 r = lookup_paths_init_from_scope(&paths, scope);
1747 if (r < 0)
1748 return r;
1749
1750 r = get_config_path(scope, runtime, root_dir, &config_path);
1751 if (r < 0)
d9e5e694 1752 return r;
83096483
LP		 1753
1754 STRV_FOREACH(i, files) {
1755
d9e5e694
ZJS		 1756 if (!unit_name_is_valid(*i, true))
1757 return -EINVAL;
83096483
LP		 1758
1759 r = unit_file_query_preset(scope, *i);
1760 if (r < 0)
d9e5e694 1761 return r;
83096483
LP		 1762
1763 if (r)
1764 r = install_info_add_auto(&plus, *i);
1765 else
1766 r = install_info_add_auto(&minus, *i);
1767
1768 if (r < 0)
d9e5e694 1769 return r;
83096483
LP		 1770 }
1771
d9e5e694
ZJS		 1772 r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to,
1773 config_path, root_dir);
83096483 1774
d9e5e694
ZJS		 1775 q = remove_marked_symlinks(remove_symlinks_to, config_path,
1776 changes, n_changes, files);
83096483
LP		 1777 if (r == 0)
1778 r = q;
1779
729e3769 1780 /* Returns number of symlinks that where supposed to be installed. */
d9e5e694
ZJS		 1781 q = install_context_apply(&plus, &paths, config_path, root_dir, force,
1782 changes, n_changes);
83096483
LP		 1783 if (r == 0)
1784 r = q;
1785
83096483
LP		 1786 return r;
1787}
1788
d9e5e694
ZJS		 1789static void unitfilelist_free(UnitFileList **f) {
1790 if (!*f)
1791 return;
1792
1793 free((*f)->path);
1794 free(*f);
1795}
1796
83096483
LP		 1797int unit_file_get_list(
1798 UnitFileScope scope,
1799 const char *root_dir,
1800 Hashmap *h) {
1801
7fd1b19b 1802 _cleanup_lookup_paths_free_ LookupPaths paths = {};
d9e5e694 1803 char **i;
7fd1b19b
HH		 1804 _cleanup_free_ char *buf = NULL;
1805 _cleanup_closedir_ DIR *d = NULL;
83096483
LP		 1806 int r;
1807
1808 assert(scope >= 0);
1809 assert(scope < _UNIT_FILE_SCOPE_MAX);
1810 assert(h);
1811
83096483
LP		 1812 if (root_dir && scope != UNIT_FILE_SYSTEM)
1813 return -EINVAL;
1814
1815 r = lookup_paths_init_from_scope(&paths, scope);
1816 if (r < 0)
1817 return r;
1818
1819 STRV_FOREACH(i, paths.unit_path) {
83096483
LP		 1820 const char *units_dir;
1821
1822 free(buf);
1823 buf = NULL;
1824
1825 if (root_dir) {
d9e5e694
ZJS		 1826 if (asprintf(&buf, "%s/%s", root_dir, *i) < 0)
1827 return -ENOMEM;
1828
83096483
LP		 1829 units_dir = buf;
1830 } else
1831 units_dir = *i;
1832
1833 if (d)
1834 closedir(d);
1835
1836 d = opendir(units_dir);
1837 if (!d) {
1838 if (errno == ENOENT)
1839 continue;
1840
d9e5e694 1841 return -errno;
83096483
LP		 1842 }
1843
1844 for (;;) {
7d5e9c0f
LP		 1845 struct dirent *de;
1846 union dirent_storage buffer;
d9e5e694
ZJS		 1847 UnitFileList __attribute__((cleanup(unitfilelist_free)))
1848 *f = NULL;
83096483 1849
7d5e9c0f 1850 r = readdir_r(d, &buffer.de, &de);
d9e5e694
ZJS		 1851 if (r != 0)
1852 return -r;
83096483
LP		 1853
1854 if (!de)
1855 break;
1856
1857 if (ignore_file(de->d_name))
1858 continue;
1859
5f739699 1860 if (!unit_name_is_valid(de->d_name, true))
83096483
LP		 1861 continue;
1862
1863 if (hashmap_get(h, de->d_name))
1864 continue;
1865
1866 r = dirent_ensure_type(d, de);
1867 if (r < 0) {
fb5ef067 1868 if (r == -ENOENT)
83096483
LP		 1869 continue;
1870
d9e5e694 1871 return r;
83096483
LP		 1872 }
1873
1874 if (de->d_type != DT_LNK && de->d_type != DT_REG)
1875 continue;
1876
1877 f = new0(UnitFileList, 1);
d9e5e694
ZJS		 1878 if (!f)
1879 return -ENOMEM;
83096483
LP		 1880
1881 f->path = path_make_absolute(de->d_name, units_dir);
d9e5e694
ZJS		 1882 if (!f->path)
1883 return -ENOMEM;
83096483
LP		 1884
1885 r = null_or_empty_path(f->path);
d9e5e694
ZJS		 1886 if (r < 0 && r != -ENOENT)
1887 return r;
1888 else if (r > 0) {
83096483
LP		 1889 f->state =
1890 path_startswith(*i, "/run") ?
1891 UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
1892 goto found;
1893 }
1894
1895 r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state);
d9e5e694
ZJS		 1896 if (r < 0)
1897 return r;
1898 else if (r > 0) {
b5b46d59 1899 f->state = UNIT_FILE_ENABLED;
83096483 1900 goto found;
b5b46d59 1901 }
83096483
LP		 1902
1903 r = unit_file_can_install(&paths, root_dir, f->path, true);
b5b46d59
LP		 1904 if (r == -EINVAL || /* Invalid setting? */
1905 r == -EBADMSG || /* Invalid format? */
1906 r == -ENOENT /* Included file not found? */)
1907 f->state = UNIT_FILE_INVALID;
d9e5e694
ZJS		 1908 else if (r < 0)
1909 return r;
1910 else if (r > 0)
83096483 1911 f->state = UNIT_FILE_DISABLED;
b5b46d59 1912 else
83096483 1913 f->state = UNIT_FILE_STATIC;
83096483
LP		 1914
1915 found:
9eb977db 1916 r = hashmap_put(h, path_get_file_name(f->path), f);
d9e5e694
ZJS		 1917 if (r < 0)
1918 return r;
1919 f = NULL; /* prevent cleanup */
83096483
LP		 1920 }
1921 }
1922
83096483
LP		 1923 return r;
1924}
1925
1926static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
1927 [UNIT_FILE_ENABLED] = "enabled",
771faa9a 1928 [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtime",
83096483
LP		 1929 [UNIT_FILE_LINKED] = "linked",
1930 [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime",
1931 [UNIT_FILE_MASKED] = "masked",
1932 [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
1933 [UNIT_FILE_STATIC] = "static",
b5b46d59
LP		 1934 [UNIT_FILE_DISABLED] = "disabled",
1935 [UNIT_FILE_INVALID] = "invalid",
83096483
LP		 1936};
1937
1938DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);
c0576cd6
LP		 1939
1940static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = {
1941 [UNIT_FILE_SYMLINK] = "symlink",
1942 [UNIT_FILE_UNLINK] = "unlink",
1943};
1944
1945DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType);
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