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install: make "reenable" work with templated units
[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;
d7b478b4 509 _cleanup_free_ char *path2 = 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) {
d7b478b4 517 _cleanup_free_ char *path = NULL;
83096483
LP		 518
519 /* First look in runtime config path */
520 r = get_config_path(scope, true, root_dir, &path);
521 if (r < 0)
522 return r;
523
524 r = find_symlinks(name, path, &same_name_link_runtime);
83096483
LP		 525 if (r < 0)
526 return r;
527 else if (r > 0) {
528 *state = UNIT_FILE_ENABLED_RUNTIME;
529 return r;
530 }
531 }
532
533 /* Then look in the normal config path */
d7b478b4 534 r = get_config_path(scope, false, root_dir, &path2);
83096483
LP		 535 if (r < 0)
536 return r;
537
d7b478b4 538 r = find_symlinks(name, path2, &same_name_link);
83096483
LP		 539 if (r < 0)
540 return r;
541 else if (r > 0) {
542 *state = UNIT_FILE_ENABLED;
543 return r;
544 }
545
546 /* Hmm, we didn't find it, but maybe we found the same name
547 * link? */
548 if (same_name_link_runtime) {
549 *state = UNIT_FILE_LINKED_RUNTIME;
550 return 1;
551 } else if (same_name_link) {
552 *state = UNIT_FILE_LINKED;
553 return 1;
554 }
555
556 return 0;
557}
558
559int unit_file_mask(
560 UnitFileScope scope,
561 bool runtime,
562 const char *root_dir,
563 char *files[],
564 bool force,
565 UnitFileChange **changes,
566 unsigned *n_changes) {
567
d8831ed5 568 char **i;
7fd1b19b 569 _cleanup_free_ char *prefix;
83096483
LP		 570 int r;
571
572 assert(scope >= 0);
573 assert(scope < _UNIT_FILE_SCOPE_MAX);
574
575 r = get_config_path(scope, runtime, root_dir, &prefix);
576 if (r < 0)
577 return r;
578
579 STRV_FOREACH(i, files) {
7fd1b19b 580 _cleanup_free_ char *path = NULL;
83096483 581
5f739699 582 if (!unit_name_is_valid(*i, true)) {
83096483
LP		 583 if (r == 0)
584 r = -EINVAL;
585 continue;
586 }
587
588 path = path_make_absolute(*i, prefix);
589 if (!path) {
590 r = -ENOMEM;
591 break;
592 }
593
594 if (symlink("/dev/null", path) >= 0) {
595 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
596
83096483
LP		 597 continue;
598 }
599
600 if (errno == EEXIST) {
601
d8831ed5 602 if (null_or_empty_path(path) > 0)
83096483 603 continue;
83096483
LP		 604
605 if (force) {
606 unlink(path);
607
608 if (symlink("/dev/null", path) >= 0) {
609
610 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
611 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
612
83096483
LP		 613 continue;
614 }
615 }
616
617 if (r == 0)
618 r = -EEXIST;
619 } else {
620 if (r == 0)
621 r = -errno;
622 }
83096483
LP		 623 }
624
83096483
LP		 625 return r;
626}
627
628int unit_file_unmask(
629 UnitFileScope scope,
630 bool runtime,
631 const char *root_dir,
632 char *files[],
633 UnitFileChange **changes,
634 unsigned *n_changes) {
635
636 char **i, *config_path = NULL;
637 int r, q;
638 Set *remove_symlinks_to = NULL;
639
640 assert(scope >= 0);
641 assert(scope < _UNIT_FILE_SCOPE_MAX);
642
643 r = get_config_path(scope, runtime, root_dir, &config_path);
644 if (r < 0)
645 goto finish;
646
647 STRV_FOREACH(i, files) {
648 char *path;
649
5f739699 650 if (!unit_name_is_valid(*i, true)) {
83096483
LP		 651 if (r == 0)
652 r = -EINVAL;
653 continue;
654 }
655
656 path = path_make_absolute(*i, config_path);
657 if (!path) {
658 r = -ENOMEM;
659 break;
660 }
661
662 q = null_or_empty_path(path);
663 if (q > 0) {
664 if (unlink(path) >= 0) {
665 mark_symlink_for_removal(&remove_symlinks_to, path);
666 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
667
668 free(path);
669 continue;
670 }
671
672 q = -errno;
673 }
674
675 if (q != -ENOENT && r == 0)
676 r = q;
677
678 free(path);
679 }
680
681
682finish:
29283ea4 683 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
83096483
LP		 684 if (r == 0)
685 r = q;
686
687 set_free_free(remove_symlinks_to);
688 free(config_path);
689
690 return r;
691}
692
693int unit_file_link(
694 UnitFileScope scope,
695 bool runtime,
696 const char *root_dir,
697 char *files[],
698 bool force,
699 UnitFileChange **changes,
700 unsigned *n_changes) {
701
7fd1b19b 702 _cleanup_lookup_paths_free_ LookupPaths paths = {};
d9e5e694 703 char **i;
7fd1b19b 704 _cleanup_free_ char *config_path = NULL;
83096483
LP		 705 int r, q;
706
707 assert(scope >= 0);
708 assert(scope < _UNIT_FILE_SCOPE_MAX);
709
83096483
LP		 710 r = lookup_paths_init_from_scope(&paths, scope);
711 if (r < 0)
712 return r;
713
714 r = get_config_path(scope, runtime, root_dir, &config_path);
715 if (r < 0)
d9e5e694 716 return r;
83096483
LP		 717
718 STRV_FOREACH(i, files) {
7fd1b19b 719 _cleanup_free_ char *path = NULL;
d9e5e694 720 char *fn;
83096483
LP		 721 struct stat st;
722
9eb977db 723 fn = path_get_file_name(*i);
83096483
LP		 724
725 if (!path_is_absolute(*i) ||
5f739699 726 !unit_name_is_valid(fn, true)) {
83096483
LP		 727 if (r == 0)
728 r = -EINVAL;
729 continue;
730 }
731
732 if (lstat(*i, &st) < 0) {
733 if (r == 0)
734 r = -errno;
735 continue;
736 }
737
738 if (!S_ISREG(st.st_mode)) {
739 r = -ENOENT;
740 continue;
741 }
742
743 q = in_search_path(*i, paths.unit_path);
d9e5e694
ZJS		 744 if (q < 0)
745 return q;
83096483
LP		 746
747 if (q > 0)
748 continue;
749
750 path = path_make_absolute(fn, config_path);
d9e5e694
ZJS		 751 if (!path)
752 return -ENOMEM;
83096483
LP		 753
754 if (symlink(*i, path) >= 0) {
755 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
83096483
LP		 756 continue;
757 }
758
759 if (errno == EEXIST) {
7fd1b19b 760 _cleanup_free_ char *dest = NULL;
83096483
LP		 761
762 q = readlink_and_make_absolute(path, &dest);
763
764 if (q < 0 && errno != ENOENT) {
83096483
LP		 765 if (r == 0)
766 r = q;
83096483
LP		 767 continue;
768 }
769
d9e5e694 770 if (q >= 0 && path_equal(dest, *i))
83096483 771 continue;
83096483
LP		 772
773 if (force) {
774 unlink(path);
775
776 if (symlink(*i, path) >= 0) {
777
778 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
779 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
780
83096483
LP		 781 continue;
782 }
783 }
784
785 if (r == 0)
786 r = -EEXIST;
787 } else {
788 if (r == 0)
789 r = -errno;
790 }
83096483
LP		 791 }
792
83096483
LP		 793 return r;
794}
795
796void unit_file_list_free(Hashmap *h) {
797 UnitFileList *i;
798
799 while ((i = hashmap_steal_first(h))) {
800 free(i->path);
801 free(i);
802 }
803
804 hashmap_free(h);
805}
806
807void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) {
808 unsigned i;
809
810 assert(changes || n_changes == 0);
811
812 if (!changes)
813 return;
814
815 for (i = 0; i < n_changes; i++) {
816 free(changes[i].path);
817 free(changes[i].source);
818 }
819
820 free(changes);
821}
822
823static void install_info_free(InstallInfo *i) {
824 assert(i);
825
826 free(i->name);
827 free(i->path);
828 strv_free(i->aliases);
829 strv_free(i->wanted_by);
78d54bd4 830 strv_free(i->required_by);
83096483
LP		 831 free(i);
832}
833
834static void install_info_hashmap_free(Hashmap *m) {
835 InstallInfo *i;
836
837 if (!m)
838 return;
839
840 while ((i = hashmap_steal_first(m)))
841 install_info_free(i);
842
843 hashmap_free(m);
844}
845
846static void install_context_done(InstallContext *c) {
847 assert(c);
848
849 install_info_hashmap_free(c->will_install);
850 install_info_hashmap_free(c->have_installed);
851
852 c->will_install = c->have_installed = NULL;
853}
854
855static int install_info_add(
856 InstallContext *c,
857 const char *name,
858 const char *path) {
859 InstallInfo *i = NULL;
860 int r;
861
862 assert(c);
863 assert(name || path);
864
865 if (!name)
9eb977db 866 name = path_get_file_name(path);
83096483 867
5f739699 868 if (!unit_name_is_valid(name, true))
83096483
LP		 869 return -EINVAL;
870
871 if (hashmap_get(c->have_installed, name) ||
872 hashmap_get(c->will_install, name))
873 return 0;
874
875 r = hashmap_ensure_allocated(&c->will_install, string_hash_func, string_compare_func);
876 if (r < 0)
877 return r;
878
879 i = new0(InstallInfo, 1);
880 if (!i)
881 return -ENOMEM;
882
883 i->name = strdup(name);
884 if (!i->name) {
885 r = -ENOMEM;
886 goto fail;
887 }
888
889 if (path) {
890 i->path = strdup(path);
891 if (!i->path) {
892 r = -ENOMEM;
893 goto fail;
894 }
895 }
896
897 r = hashmap_put(c->will_install, i->name, i);
898 if (r < 0)
899 goto fail;
900
901 return 0;
902
903fail:
904 if (i)
905 install_info_free(i);
906
907 return r;
908}
909
910static int install_info_add_auto(
911 InstallContext *c,
912 const char *name_or_path) {
913
914 assert(c);
915 assert(name_or_path);
916
917 if (path_is_absolute(name_or_path))
918 return install_info_add(c, NULL, name_or_path);
919 else
920 return install_info_add(c, name_or_path, NULL);
921}
922
e8e581bf
ZJS		 923static int config_parse_also(const char *unit,
924 const char *filename,
925 unsigned line,
926 const char *section,
927 const char *lvalue,
928 int ltype,
929 const char *rvalue,
930 void *data,
931 void *userdata) {
83096483
LP		 932
933 char *w;
934 size_t l;
935 char *state;
936 InstallContext *c = data;
937
938 assert(filename);
939 assert(lvalue);
940 assert(rvalue);
941
942 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
7fd1b19b 943 _cleanup_free_ char *n;
83096483
LP		 944 int r;
945
946 n = strndup(w, l);
947 if (!n)
948 return -ENOMEM;
949
950 r = install_info_add(c, n, NULL);
d9e5e694 951 if (r < 0)
83096483 952 return r;
83096483
LP		 953 }
954
955 return 0;
956}
957
e8e581bf
ZJS		 958static int config_parse_user(const char *unit,
959 const char *filename,
960 unsigned line,
961 const char *section,
962 const char *lvalue,
963 int ltype,
964 const char *rvalue,
965 void *data,
966 void *userdata) {
3f0b2f0f
ZJS		 967
968 InstallInfo *i = data;
969 char* printed;
970
971 assert(filename);
972 assert(lvalue);
973 assert(rvalue);
974
975 printed = install_full_printf(i, rvalue);
976 if (!printed)
977 return -ENOMEM;
978
979 free(i->user);
980 i->user = printed;
981
982 return 0;
983}
984
83096483
LP		 985static int unit_file_load(
986 InstallContext *c,
987 InstallInfo *info,
988 const char *path,
989 bool allow_symlink) {
990
f975e971 991 const ConfigTableItem items[] = {
78d54bd4
LP		 992 { "Install", "Alias", config_parse_strv, 0, &info->aliases },
993 { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
994 { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
995 { "Install", "Also", config_parse_also, 0, c },
3f0b2f0f 996 { "Exec", "User", config_parse_user, 0, info },
f975e971 997 { NULL, NULL, NULL, 0, NULL }
83096483
LP		 998 };
999
1000 int fd;
7fd1b19b 1001 _cleanup_fclose_ FILE *f = NULL;
83096483
LP		 1002 int r;
1003
1004 assert(c);
1005 assert(info);
1006 assert(path);
1007
1008 fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|(allow_symlink ? 0 : O_NOFOLLOW));
1009 if (fd < 0)
1010 return -errno;
1011
1012 f = fdopen(fd, "re");
1013 if (!f) {
1014 close_nointr_nofail(fd);
1015 return -ENOMEM;
1016 }
1017
e8e581bf 1018 r = config_parse(NULL, path, f, NULL,
db5c0122 1019 config_item_table_lookup, (void*) items, true, true, info);
83096483
LP		 1020 if (r < 0)
1021 return r;
1022
78d54bd4
LP		 1023 return
1024 strv_length(info->aliases) +
1025 strv_length(info->wanted_by) +
1026 strv_length(info->required_by);
83096483
LP		 1027}
1028
1029static int unit_file_search(
1030 InstallContext *c,
1031 InstallInfo *info,
1032 LookupPaths *paths,
1033 const char *root_dir,
1034 bool allow_symlink) {
1035
1036 char **p;
1037 int r;
1038
1039 assert(c);
1040 assert(info);
1041 assert(paths);
1042
1043 if (info->path)
1044 return unit_file_load(c, info, info->path, allow_symlink);
1045
1046 assert(info->name);
1047
1048 STRV_FOREACH(p, paths->unit_path) {
1049 char *path = NULL;
1050
1051 if (isempty(root_dir))
1052 asprintf(&path, "%s/%s", *p, info->name);
1053 else
1054 asprintf(&path, "%s/%s/%s", root_dir, *p, info->name);
1055
1056 if (!path)
1057 return -ENOMEM;
1058
1059 r = unit_file_load(c, info, path, allow_symlink);
1060
1061 if (r >= 0)
1062 info->path = path;
29283ea4
MS		 1063 else {
1064 if (r == -ENOENT && unit_name_is_instance(info->name)) {
1065 /* unit file doesn't exist, however instance enablement was request */
1066 /* we will check if it is possible to load template unit file */
1067 char *template = NULL,
1068 *template_path = NULL,
1069 *template_dir = NULL;
1070
1071 template = unit_name_template(info->name);
1072 if (!template) {
1073 free(path);
1074 return -ENOMEM;
1075 }
1076
1077 /* we will reuse path variable since we don't need it anymore */
1078 template_dir = path;
1079 *(strrchr(path, '/') + 1) = '\0';
1080
1081 template_path = strjoin(template_dir, template, NULL);
1082 if (!template_path) {
1083 free(path);
1084 free(template);
1085 return -ENOMEM;
1086 }
1087
1088 /* let's try to load template unit */
1089 r = unit_file_load(c, info, template_path, allow_symlink);
1090 if (r >= 0) {
1091 info->path = strdup(template_path);
1092 if (!info->path) {
1093 free(path);
1094 free(template);
1095 free(template_path);
1096 return -ENOMEM;
1097 }
1098 }
1099
1100 free(template);
1101 free(template_path);
1102 }
83096483 1103 free(path);
29283ea4 1104 }
83096483
LP		 1105
1106 if (r != -ENOENT && r != -ELOOP)
1107 return r;
1108 }
1109
1110 return -ENOENT;
1111}
1112
1113static int unit_file_can_install(
1114 LookupPaths *paths,
1115 const char *root_dir,
1116 const char *name,
1117 bool allow_symlink) {
1118
7fd1b19b 1119 _cleanup_install_context_done_ InstallContext c = {};
83096483
LP		 1120 InstallInfo *i;
1121 int r;
1122
1123 assert(paths);
1124 assert(name);
1125
83096483
LP		 1126 r = install_info_add_auto(&c, name);
1127 if (r < 0)
1128 return r;
1129
1130 assert_se(i = hashmap_first(c.will_install));
1131
1132 r = unit_file_search(&c, i, paths, root_dir, allow_symlink);
1133
1134 if (r >= 0)
78d54bd4
LP		 1135 r =
1136 strv_length(i->aliases) +
1137 strv_length(i->wanted_by) +
1138 strv_length(i->required_by);
83096483 1139
83096483
LP		 1140 return r;
1141}
1142
1143static int create_symlink(
1144 const char *old_path,
1145 const char *new_path,
1146 bool force,
1147 UnitFileChange **changes,
1148 unsigned *n_changes) {
1149
7fd1b19b 1150 _cleanup_free_ char *dest = NULL;
83096483
LP		 1151 int r;
1152
1153 assert(old_path);
1154 assert(new_path);
1155
d2e54fae 1156 mkdir_parents_label(new_path, 0755);
83096483
LP		 1157
1158 if (symlink(old_path, new_path) >= 0) {
1159 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
1160 return 0;
1161 }
1162
1163 if (errno != EEXIST)
1164 return -errno;
1165
1166 r = readlink_and_make_absolute(new_path, &dest);
1167 if (r < 0)
1168 return r;
1169
d9e5e694 1170 if (path_equal(dest, old_path))
83096483 1171 return 0;
83096483 1172
ba49b4a1 1173 if (!force)
83096483
LP		 1174 return -EEXIST;
1175
1176 unlink(new_path);
1177
1178 if (symlink(old_path, new_path) >= 0) {
1179 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL);
1180 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
1181 return 0;
1182 }
1183
1184 return -errno;
1185}
1186
1187static int install_info_symlink_alias(
1188 InstallInfo *i,
1189 const char *config_path,
1190 bool force,
1191 UnitFileChange **changes,
1192 unsigned *n_changes) {
1193
1194 char **s;
1195 int r = 0, q;
1196
1197 assert(i);
1198 assert(config_path);
1199
1200 STRV_FOREACH(s, i->aliases) {
7fd1b19b 1201 _cleanup_free_ char *alias_path = NULL, *dst = NULL;
83096483 1202
7584d236
ZJS		 1203 dst = install_full_printf(i, *s);
1204 if (!dst)
1205 return -ENOMEM;
83096483 1206
7584d236 1207 alias_path = path_make_absolute(dst, config_path);
83096483
LP		 1208 if (!alias_path)
1209 return -ENOMEM;
1210
1211 q = create_symlink(i->path, alias_path, force, changes, n_changes);
83096483
LP		 1212 if (r == 0)
1213 r = q;
1214 }
1215
1216 return r;
1217}
1218
1219static int install_info_symlink_wants(
1220 InstallInfo *i,
1221 const char *config_path,
1222 bool force,
1223 UnitFileChange **changes,
1224 unsigned *n_changes) {
1225
1226 char **s;
1227 int r = 0, q;
1228
1229 assert(i);
1230 assert(config_path);
1231
1232 STRV_FOREACH(s, i->wanted_by) {
7fd1b19b 1233 _cleanup_free_ char *path = NULL, *dst = NULL;
83096483 1234
7584d236
ZJS		 1235 dst = install_full_printf(i, *s);
1236 if (!dst)
1237 return -ENOMEM;
1238
1239 if (!unit_name_is_valid(dst, true)) {
83096483
LP		 1240 r = -EINVAL;
1241 continue;
1242 }
1243
7584d236 1244 if (asprintf(&path, "%s/%s.wants/%s", config_path, dst, i->name) < 0)
83096483
LP		 1245 return -ENOMEM;
1246
1247 q = create_symlink(i->path, path, force, changes, n_changes);
83096483
LP		 1248
1249 if (r == 0)
1250 r = q;
1251 }
1252
1253 return r;
1254}
1255
78d54bd4
LP		 1256static int install_info_symlink_requires(
1257 InstallInfo *i,
1258 const char *config_path,
1259 bool force,
1260 UnitFileChange **changes,
1261 unsigned *n_changes) {
1262
1263 char **s;
1264 int r = 0, q;
1265
1266 assert(i);
1267 assert(config_path);
1268
1269 STRV_FOREACH(s, i->required_by) {
7fd1b19b 1270 _cleanup_free_ char *path = NULL, *dst = NULL;
78d54bd4 1271
7584d236
ZJS		 1272 dst = install_full_printf(i, *s);
1273 if (!dst)
1274 return -ENOMEM;
1275
1276 if (!unit_name_is_valid(dst, true)) {
78d54bd4
LP		 1277 r = -EINVAL;
1278 continue;
1279 }
1280
7584d236 1281 if (asprintf(&path, "%s/%s.requires/%s", config_path, dst, i->name) < 0)
78d54bd4
LP		 1282 return -ENOMEM;
1283
1284 q = create_symlink(i->path, path, force, changes, n_changes);
78d54bd4
LP		 1285
1286 if (r == 0)
1287 r = q;
1288 }
1289
1290 return r;
1291}
1292
83096483
LP		 1293static int install_info_symlink_link(
1294 InstallInfo *i,
1295 LookupPaths *paths,
1296 const char *config_path,
1297 bool force,
1298 UnitFileChange **changes,
1299 unsigned *n_changes) {
1300
1301 int r;
7fd1b19b 1302 _cleanup_free_ char *path = NULL;
83096483
LP		 1303
1304 assert(i);
1305 assert(paths);
1306 assert(config_path);
1307 assert(i->path);
1308
1309 r = in_search_path(i->path, paths->unit_path);
1310 if (r != 0)
1311 return r;
1312
1313 if (asprintf(&path, "%s/%s", config_path, i->name) < 0)
1314 return -ENOMEM;
1315
1316 r = create_symlink(i->path, path, force, changes, n_changes);
83096483
LP		 1317 return r;
1318}
1319
1320static int install_info_apply(
1321 InstallInfo *i,
1322 LookupPaths *paths,
1323 const char *config_path,
1324 bool force,
1325 UnitFileChange **changes,
1326 unsigned *n_changes) {
1327
1328 int r, q;
1329
1330 assert(i);
1331 assert(paths);
1332 assert(config_path);
1333
1334 r = install_info_symlink_alias(i, config_path, force, changes, n_changes);
1335
1336 q = install_info_symlink_wants(i, config_path, force, changes, n_changes);
1337 if (r == 0)
1338 r = q;
1339
78d54bd4
LP		 1340 q = install_info_symlink_requires(i, config_path, force, changes, n_changes);
1341 if (r == 0)
1342 r = q;
1343
83096483
LP		 1344 q = install_info_symlink_link(i, paths, config_path, force, changes, n_changes);
1345 if (r == 0)
1346 r = q;
1347
1348 return r;
1349}
1350
1351static int install_context_apply(
1352 InstallContext *c,
1353 LookupPaths *paths,
1354 const char *config_path,
1355 const char *root_dir,
1356 bool force,
1357 UnitFileChange **changes,
1358 unsigned *n_changes) {
1359
1360 InstallInfo *i;
1361 int r = 0, q;
1362
1363 assert(c);
1364 assert(paths);
1365 assert(config_path);
1366
1367 while ((i = hashmap_first(c->will_install))) {
1368
1369 q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
1370 if (q < 0)
1371 return q;
1372
1373 assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
1374
1375 q = unit_file_search(c, i, paths, root_dir, false);
1376 if (q < 0) {
1377 if (r >= 0)
1378 r = q;
1379
1380 return r;
1381 } else if (r >= 0)
1382 r += q;
1383
1384 q = install_info_apply(i, paths, config_path, force, changes, n_changes);
1385 if (r >= 0 && q < 0)
1386 r = q;
1387 }
1388
1389 return r;
1390}
1391
1392static int install_context_mark_for_removal(
1393 InstallContext *c,
1394 LookupPaths *paths,
1395 Set **remove_symlinks_to,
1396 const char *config_path,
1397 const char *root_dir) {
1398
1399 InstallInfo *i;
1400 int r = 0, q;
1401
1402 assert(c);
1403 assert(paths);
1404 assert(config_path);
1405
1406 /* Marks all items for removal */
1407
1408 while ((i = hashmap_first(c->will_install))) {
1409
1410 q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
1411 if (q < 0)
1412 return q;
1413
1414 assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
1415
1416 q = unit_file_search(c, i, paths, root_dir, false);
02b9e969
ZJS		 1417 if (q == -ENOENT) {
1418 /* do nothing */
1419 } else if (q < 0) {
83096483
LP		 1420 if (r >= 0)
1421 r = q;
1422
1423 return r;
1424 } else if (r >= 0)
1425 r += q;
1426
29283ea4
MS		 1427 if (unit_name_is_instance(i->name)) {
1428 char *unit_file = NULL;
1429
1430 unit_file = path_get_file_name(i->path);
1431
1432 if (unit_name_is_instance(unit_file))
1433 /* unit file named as instance exists, thus all symlinks pointing to it, will be removed */
1434 q = mark_symlink_for_removal(remove_symlinks_to, i->name);
1435 else
1436 /* does not exist, thus we will mark for removal symlinks to template unit file */
1437 q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
1438 } else
1439 q = mark_symlink_for_removal(remove_symlinks_to, i->name);
1440
83096483
LP		 1441 if (r >= 0 && q < 0)
1442 r = q;
1443 }
1444
1445 return r;
1446}
1447
1448int unit_file_enable(
1449 UnitFileScope scope,
1450 bool runtime,
1451 const char *root_dir,
1452 char *files[],
1453 bool force,
1454 UnitFileChange **changes,
1455 unsigned *n_changes) {
1456
7fd1b19b
HH		 1457 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1458 _cleanup_install_context_done_ InstallContext c = {};
d9e5e694 1459 char **i;
7fd1b19b 1460 _cleanup_free_ char *config_path = NULL;
83096483
LP		 1461 int r;
1462
1463 assert(scope >= 0);
1464 assert(scope < _UNIT_FILE_SCOPE_MAX);
1465
83096483
LP		 1466 r = lookup_paths_init_from_scope(&paths, scope);
1467 if (r < 0)
1468 return r;
1469
1470 r = get_config_path(scope, runtime, root_dir, &config_path);
1471 if (r < 0)
d9e5e694 1472 return r;
83096483
LP		 1473
1474 STRV_FOREACH(i, files) {
1475 r = install_info_add_auto(&c, *i);
1476 if (r < 0)
d9e5e694 1477 return r;
83096483
LP		 1478 }
1479
729e3769
LP		 1480 /* This will return the number of symlink rules that were
1481 supposed to be created, not the ones actually created. This is
20f59e42 1482 useful to determine whether the passed files had any
729e3769 1483 installation data at all. */
83096483 1484 r = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
83096483
LP		 1485 return r;
1486}
1487
1488int unit_file_disable(
1489 UnitFileScope scope,
1490 bool runtime,
1491 const char *root_dir,
1492 char *files[],
1493 UnitFileChange **changes,
1494 unsigned *n_changes) {
1495
7fd1b19b
HH		 1496 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1497 _cleanup_install_context_done_ InstallContext c = {};
d9e5e694 1498 char **i;
7fd1b19b
HH		 1499 _cleanup_free_ char *config_path = NULL;
1500 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
83096483
LP		 1501 int r, q;
1502
1503 assert(scope >= 0);
1504 assert(scope < _UNIT_FILE_SCOPE_MAX);
1505
83096483
LP		 1506 r = lookup_paths_init_from_scope(&paths, scope);
1507 if (r < 0)
1508 return r;
1509
1510 r = get_config_path(scope, runtime, root_dir, &config_path);
1511 if (r < 0)
d9e5e694 1512 return r;
83096483
LP		 1513
1514 STRV_FOREACH(i, files) {
1515 r = install_info_add_auto(&c, *i);
1516 if (r < 0)
d9e5e694 1517 return r;
83096483
LP		 1518 }
1519
1520 r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir);
1521
29283ea4 1522 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
83096483 1523 if (r == 0)
034a2a52 1524 r = q;
83096483 1525
83096483
LP		 1526 return r;
1527}
1528
1529int unit_file_reenable(
1530 UnitFileScope scope,
1531 bool runtime,
1532 const char *root_dir,
1533 char *files[],
1534 bool force,
1535 UnitFileChange **changes,
1536 unsigned *n_changes) {
92d430a9 1537 int r;
83096483 1538
92d430a9
RL		 1539 r = unit_file_disable(scope, runtime, root_dir, files,
1540 changes, n_changes);
83096483 1541 if (r < 0)
d9e5e694 1542 return r;
83096483 1543
92d430a9
RL		 1544 return unit_file_enable(scope, runtime, root_dir, files, force,
1545 changes, n_changes);
83096483
LP		 1546}
1547
99504dd4
VP		 1548int unit_file_set_default(
1549 UnitFileScope scope,
1550 const char *root_dir,
1551 char *file,
1552 UnitFileChange **changes,
1553 unsigned *n_changes) {
1554
1555 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1556 _cleanup_install_context_done_ InstallContext c = {};
1557 _cleanup_free_ char *config_path = NULL;
1558 char *path;
1559 int r;
1560 InstallInfo *i = NULL;
1561
1562 assert(scope >= 0);
1563 assert(scope < _UNIT_FILE_SCOPE_MAX);
1564
1565 if (unit_name_to_type(file) != UNIT_TARGET)
1566 return -EINVAL;
1567
1568 r = lookup_paths_init_from_scope(&paths, scope);
1569 if (r < 0)
1570 return r;
1571
1572 r = get_config_path(scope, false, root_dir, &config_path);
1573 if (r < 0)
1574 return r;
1575
1576 r = install_info_add_auto(&c, file);
1577 if (r < 0)
1578 return r;
1579
1580 i = (InstallInfo*)hashmap_first(c.will_install);
1581
1582 r = unit_file_search(&c, i, &paths, root_dir, false);
1583 if (r < 0)
1584 return r;
1585
1586 path = strappenda(config_path, "/default.target");
1587 r = create_symlink(i->path, path, true, changes, n_changes);
1588 if (r < 0)
1589 return r;
1590
1591 return 0;
1592}
1593
1594int unit_file_get_default(
1595 UnitFileScope scope,
1596 const char *root_dir,
1597 char **name) {
1598
1599 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1600 char **p;
1601 int r;
1602
1603 r = lookup_paths_init_from_scope(&paths, scope);
1604 if (r < 0)
1605 return r;
1606
1607 STRV_FOREACH(p, paths.unit_path) {
1608 _cleanup_free_ char *path = NULL, *tmp = NULL;
1609
1610 if (isempty(root_dir))
1611 path = strappend(*p, "/default.target");
1612 else
1613 path = strjoin(root_dir, "/", *p, "/default.target", NULL);
1614
1615 if (!path)
1616 return -ENOMEM;
1617
1618 r = readlink_malloc(path, &tmp);
1619 if (r == -ENOENT)
1620 continue;
1621 else if (r < 0)
1622 return r;
1623
1624 *name = strdup(path_get_file_name(tmp));
1625 if (!*name)
1626 return -ENOMEM;
1627
1628 return 0;
1629 }
1630
1631 return -ENOENT;
1632}
1633
83096483
LP		 1634UnitFileState unit_file_get_state(
1635 UnitFileScope scope,
1636 const char *root_dir,
1637 const char *name) {
1638
7fd1b19b 1639 _cleanup_lookup_paths_free_ LookupPaths paths = {};
83096483 1640 UnitFileState state = _UNIT_FILE_STATE_INVALID;
d9e5e694 1641 char **i;
7fd1b19b 1642 _cleanup_free_ char *path = NULL;
83096483
LP		 1643 int r;
1644
1645 assert(scope >= 0);
1646 assert(scope < _UNIT_FILE_SCOPE_MAX);
1647 assert(name);
1648
83096483
LP		 1649 if (root_dir && scope != UNIT_FILE_SYSTEM)
1650 return -EINVAL;
1651
5f739699 1652 if (!unit_name_is_valid(name, true))
83096483
LP		 1653 return -EINVAL;
1654
1655 r = lookup_paths_init_from_scope(&paths, scope);
1656 if (r < 0)
1657 return r;
1658
1659 STRV_FOREACH(i, paths.unit_path) {
1660 struct stat st;
1661
1662 free(path);
1663 path = NULL;
1664
1665 if (root_dir)
1666 asprintf(&path, "%s/%s/%s", root_dir, *i, name);
1667 else
1668 asprintf(&path, "%s/%s", *i, name);
1669
d9e5e694
ZJS		 1670 if (!path)
1671 return -ENOMEM;
83096483 1672
67820a0c
MT		 1673 /*
1674 * Search for a unit file in our default paths, to
1675 * be sure, that there are no broken symlinks.
1676 */
83096483 1677 if (lstat(path, &st) < 0) {
81006b8a 1678 r = -errno;
67820a0c
MT		 1679 if (errno != ENOENT)
1680 return r;
83096483 1681
67820a0c
MT		 1682 if (!unit_name_is_instance(name))
1683 continue;
1684 } else {
1685 if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
1686 return -ENOENT;
1687
1688 r = null_or_empty_path(path);
1689 if (r < 0 && r != -ENOENT)
1690 return r;
1691 else if (r > 0) {
1692 state = path_startswith(*i, "/run") ?
1693 UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
1694 return state;
1695 }
83096483
LP		 1696 }
1697
1698 r = find_symlinks_in_scope(scope, root_dir, name, &state);
d9e5e694
ZJS		 1699 if (r < 0)
1700 return r;
1701 else if (r > 0)
1702 return state;
83096483
LP		 1703
1704 r = unit_file_can_install(&paths, root_dir, path, true);
bcb161b0 1705 if (r < 0 && errno != ENOENT)
d9e5e694
ZJS		 1706 return r;
1707 else if (r > 0)
1708 return UNIT_FILE_DISABLED;
1709 else if (r == 0)
1710 return UNIT_FILE_STATIC;
83096483
LP		 1711 }
1712
83096483
LP		 1713 return r < 0 ? r : state;
1714}
1715
1716int unit_file_query_preset(UnitFileScope scope, const char *name) {
7fd1b19b 1717 _cleanup_strv_free_ char **files = NULL;
d9e5e694 1718 char **i;
83096483
LP		 1719 int r;
1720
1721 assert(scope >= 0);
1722 assert(scope < _UNIT_FILE_SCOPE_MAX);
1723 assert(name);
1724
1725 if (scope == UNIT_FILE_SYSTEM)
7850b3b8 1726 r = conf_files_list(&files, ".preset", NULL,
a7480dba
LP		 1727 "/etc/systemd/system-preset",
1728 "/usr/local/lib/systemd/system-preset",
1729 "/usr/lib/systemd/system-preset",
b4bdfefa 1730#ifdef HAVE_SPLIT_USR
a7480dba 1731 "/lib/systemd/system-preset",
b4bdfefa 1732#endif
83096483
LP		 1733 NULL);
1734 else if (scope == UNIT_FILE_GLOBAL)
7850b3b8 1735 r = conf_files_list(&files, ".preset", NULL,
a7480dba
LP		 1736 "/etc/systemd/user-preset",
1737 "/usr/local/lib/systemd/user-preset",
1738 "/usr/lib/systemd/user-preset",
83096483
LP		 1739 NULL);
1740 else
1741 return 1;
1742
1743 if (r < 0)
1744 return r;
1745
1746 STRV_FOREACH(i, files) {
7fd1b19b 1747 _cleanup_fclose_ FILE *f;
83096483
LP		 1748
1749 f = fopen(*i, "re");
1750 if (!f) {
1751 if (errno == ENOENT)
1752 continue;
1753
d9e5e694 1754 return -errno;
83096483
LP		 1755 }
1756
1757 for (;;) {
1758 char line[LINE_MAX], *l;
1759
1760 if (!fgets(line, sizeof(line), f))
1761 break;
1762
1763 l = strstrip(line);
1764 if (!*l)
1765 continue;
1766
d3b6d0c2 1767 if (strchr(COMMENTS "\n", *l))
83096483
LP		 1768 continue;
1769
1770 if (first_word(l, "enable")) {
1771 l += 6;
1772 l += strspn(l, WHITESPACE);
1773
d9e5e694
ZJS		 1774 if (fnmatch(l, name, FNM_NOESCAPE) == 0)
1775 return 1;
1776
83096483
LP		 1777 } else if (first_word(l, "disable")) {
1778 l += 7;
1779 l += strspn(l, WHITESPACE);
1780
d9e5e694
ZJS		 1781 if (fnmatch(l, name, FNM_NOESCAPE) == 0)
1782 return 0;
1783
83096483
LP		 1784 } else
1785 log_debug("Couldn't parse line '%s'", l);
1786 }
83096483
LP		 1787 }
1788
1789 /* Default is "enable" */
d9e5e694 1790 return 1;
83096483
LP		 1791}
1792
1793int unit_file_preset(
1794 UnitFileScope scope,
1795 bool runtime,
1796 const char *root_dir,
1797 char *files[],
1798 bool force,
1799 UnitFileChange **changes,
1800 unsigned *n_changes) {
1801
7fd1b19b
HH		 1802 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1803 _cleanup_install_context_done_ InstallContext plus = {}, minus = {};
d9e5e694 1804 char **i;
7fd1b19b
HH		 1805 _cleanup_free_ char *config_path = NULL;
1806 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
83096483
LP		 1807 int r, q;
1808
1809 assert(scope >= 0);
1810 assert(scope < _UNIT_FILE_SCOPE_MAX);
1811
83096483
LP		 1812 r = lookup_paths_init_from_scope(&paths, scope);
1813 if (r < 0)
1814 return r;
1815
1816 r = get_config_path(scope, runtime, root_dir, &config_path);
1817 if (r < 0)
d9e5e694 1818 return r;
83096483
LP		 1819
1820 STRV_FOREACH(i, files) {
1821
d9e5e694
ZJS		 1822 if (!unit_name_is_valid(*i, true))
1823 return -EINVAL;
83096483
LP		 1824
1825 r = unit_file_query_preset(scope, *i);
1826 if (r < 0)
d9e5e694 1827 return r;
83096483
LP		 1828
1829 if (r)
1830 r = install_info_add_auto(&plus, *i);
1831 else
1832 r = install_info_add_auto(&minus, *i);
1833
1834 if (r < 0)
d9e5e694 1835 return r;
83096483
LP		 1836 }
1837
d9e5e694
ZJS		 1838 r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to,
1839 config_path, root_dir);
83096483 1840
d9e5e694
ZJS		 1841 q = remove_marked_symlinks(remove_symlinks_to, config_path,
1842 changes, n_changes, files);
83096483
LP		 1843 if (r == 0)
1844 r = q;
1845
729e3769 1846 /* Returns number of symlinks that where supposed to be installed. */
d9e5e694
ZJS		 1847 q = install_context_apply(&plus, &paths, config_path, root_dir, force,
1848 changes, n_changes);
83096483
LP		 1849 if (r == 0)
1850 r = q;
1851
83096483
LP		 1852 return r;
1853}
1854
d9e5e694
ZJS		 1855static void unitfilelist_free(UnitFileList **f) {
1856 if (!*f)
1857 return;
1858
1859 free((*f)->path);
1860 free(*f);
1861}
1862
83096483
LP		 1863int unit_file_get_list(
1864 UnitFileScope scope,
1865 const char *root_dir,
1866 Hashmap *h) {
1867
7fd1b19b 1868 _cleanup_lookup_paths_free_ LookupPaths paths = {};
d9e5e694 1869 char **i;
7fd1b19b
HH		 1870 _cleanup_free_ char *buf = NULL;
1871 _cleanup_closedir_ DIR *d = NULL;
83096483
LP		 1872 int r;
1873
1874 assert(scope >= 0);
1875 assert(scope < _UNIT_FILE_SCOPE_MAX);
1876 assert(h);
1877
83096483
LP		 1878 if (root_dir && scope != UNIT_FILE_SYSTEM)
1879 return -EINVAL;
1880
1881 r = lookup_paths_init_from_scope(&paths, scope);
1882 if (r < 0)
1883 return r;
1884
1885 STRV_FOREACH(i, paths.unit_path) {
83096483
LP		 1886 const char *units_dir;
1887
1888 free(buf);
1889 buf = NULL;
1890
1891 if (root_dir) {
d9e5e694
ZJS		 1892 if (asprintf(&buf, "%s/%s", root_dir, *i) < 0)
1893 return -ENOMEM;
1894
83096483
LP		 1895 units_dir = buf;
1896 } else
1897 units_dir = *i;
1898
1899 if (d)
1900 closedir(d);
1901
1902 d = opendir(units_dir);
1903 if (!d) {
1904 if (errno == ENOENT)
1905 continue;
1906
d9e5e694 1907 return -errno;
83096483
LP		 1908 }
1909
1910 for (;;) {
7d5e9c0f
LP		 1911 struct dirent *de;
1912 union dirent_storage buffer;
d9e5e694
ZJS		 1913 UnitFileList __attribute__((cleanup(unitfilelist_free)))
1914 *f = NULL;
83096483 1915
7d5e9c0f 1916 r = readdir_r(d, &buffer.de, &de);
d9e5e694
ZJS		 1917 if (r != 0)
1918 return -r;
83096483
LP		 1919
1920 if (!de)
1921 break;
1922
1923 if (ignore_file(de->d_name))
1924 continue;
1925
5f739699 1926 if (!unit_name_is_valid(de->d_name, true))
83096483
LP		 1927 continue;
1928
1929 if (hashmap_get(h, de->d_name))
1930 continue;
1931
1932 r = dirent_ensure_type(d, de);
1933 if (r < 0) {
fb5ef067 1934 if (r == -ENOENT)
83096483
LP		 1935 continue;
1936
d9e5e694 1937 return r;
83096483
LP		 1938 }
1939
1940 if (de->d_type != DT_LNK && de->d_type != DT_REG)
1941 continue;
1942
1943 f = new0(UnitFileList, 1);
d9e5e694
ZJS		 1944 if (!f)
1945 return -ENOMEM;
83096483
LP		 1946
1947 f->path = path_make_absolute(de->d_name, units_dir);
d9e5e694
ZJS		 1948 if (!f->path)
1949 return -ENOMEM;
83096483
LP		 1950
1951 r = null_or_empty_path(f->path);
d9e5e694
ZJS		 1952 if (r < 0 && r != -ENOENT)
1953 return r;
1954 else if (r > 0) {
83096483
LP		 1955 f->state =
1956 path_startswith(*i, "/run") ?
1957 UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
1958 goto found;
1959 }
1960
1961 r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state);
d9e5e694
ZJS		 1962 if (r < 0)
1963 return r;
1964 else if (r > 0) {
b5b46d59 1965 f->state = UNIT_FILE_ENABLED;
83096483 1966 goto found;
b5b46d59 1967 }
83096483
LP		 1968
1969 r = unit_file_can_install(&paths, root_dir, f->path, true);
b5b46d59
LP		 1970 if (r == -EINVAL || /* Invalid setting? */
1971 r == -EBADMSG || /* Invalid format? */
1972 r == -ENOENT /* Included file not found? */)
1973 f->state = UNIT_FILE_INVALID;
d9e5e694
ZJS		 1974 else if (r < 0)
1975 return r;
1976 else if (r > 0)
83096483 1977 f->state = UNIT_FILE_DISABLED;
b5b46d59 1978 else
83096483 1979 f->state = UNIT_FILE_STATIC;
83096483
LP		 1980
1981 found:
9eb977db 1982 r = hashmap_put(h, path_get_file_name(f->path), f);
d9e5e694
ZJS		 1983 if (r < 0)
1984 return r;
1985 f = NULL; /* prevent cleanup */
83096483
LP		 1986 }
1987 }
1988
83096483
LP		 1989 return r;
1990}
1991
1992static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
1993 [UNIT_FILE_ENABLED] = "enabled",
771faa9a 1994 [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtime",
83096483
LP		 1995 [UNIT_FILE_LINKED] = "linked",
1996 [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime",
1997 [UNIT_FILE_MASKED] = "masked",
1998 [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
1999 [UNIT_FILE_STATIC] = "static",
b5b46d59
LP		 2000 [UNIT_FILE_DISABLED] = "disabled",
2001 [UNIT_FILE_INVALID] = "invalid",
83096483
LP		 2002};
2003
2004DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);
c0576cd6
LP		 2005
2006static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = {
2007 [UNIT_FILE_SYMLINK] = "symlink",
2008 [UNIT_FILE_UNLINK] = "unlink",
2009};
2010
2011DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType);
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