1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
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
11 (at your option) any later version.
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
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 #include "path-util.h"
33 #include "path-lookup.h"
35 #include "unit-name.h"
37 #include "conf-parser.h"
38 #include "conf-files.h"
39 #include "specifier.h"
40 #include "install-printf.h"
44 Hashmap *will_install;
45 Hashmap *have_installed;
48 #define _cleanup_install_context_done_ _cleanup_(install_context_done)
50 static int in_search_path(const char *path, char **search) {
51 _cleanup_free_ char *parent = NULL;
56 r = path_get_parent(path, &parent);
60 return strv_contains(search, parent);
63 static int lookup_paths_init_from_scope(LookupPaths *paths,
65 const char *root_dir) {
68 assert(scope < _UNIT_FILE_SCOPE_MAX);
72 return lookup_paths_init(paths,
73 scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
74 scope == UNIT_FILE_USER,
79 static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
84 assert(scope < _UNIT_FILE_SCOPE_MAX);
89 case UNIT_FILE_SYSTEM:
92 p = path_join(root_dir, "/run/systemd/system", NULL);
94 p = path_join(root_dir, SYSTEM_CONFIG_UNIT_PATH, NULL);
97 case UNIT_FILE_GLOBAL:
103 p = strdup("/run/systemd/user");
105 p = strdup(USER_CONFIG_UNIT_PATH);
110 if (root_dir || runtime)
113 r = user_config_home(&p);
115 return r < 0 ? r : -ENOENT;
120 assert_not_reached("Bad scope");
130 static int add_file_change(
131 UnitFileChange **changes,
133 UnitFileChangeType type,
135 const char *source) {
141 assert(!changes == !n_changes);
146 c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange));
154 c[i].path = strdup(path);
158 path_kill_slashes(c[i].path);
161 c[i].source = strdup(source);
167 path_kill_slashes(c[i].path);
175 static int mark_symlink_for_removal(
176 Set **remove_symlinks_to,
184 r = set_ensure_allocated(remove_symlinks_to, string_hash_func, string_compare_func);
192 path_kill_slashes(n);
194 r = set_consume(*remove_symlinks_to, n);
196 return r == -EEXIST ? 0 : r;
201 static int remove_marked_symlinks_fd(
202 Set *remove_symlinks_to,
205 const char *config_path,
207 UnitFileChange **changes,
209 char** instance_whitelist) {
211 _cleanup_closedir_ DIR *d = NULL;
214 assert(remove_symlinks_to);
233 if (!de && errno != 0) {
241 if (ignore_file(de->d_name))
244 dirent_ensure_type(d, de);
246 if (de->d_type == DT_DIR) {
248 _cleanup_free_ char *p = NULL;
250 nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
260 p = path_make_absolute(de->d_name, path);
266 /* This will close nfd, regardless whether it succeeds or not */
267 q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes, instance_whitelist);
271 } else if (de->d_type == DT_LNK) {
272 _cleanup_free_ char *p = NULL, *dest = NULL;
276 if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID))
279 if (unit_name_is_instance(de->d_name) &&
280 instance_whitelist &&
281 !strv_contains(instance_whitelist, de->d_name)) {
283 _cleanup_free_ char *w;
285 /* OK, the file is not listed directly
286 * in the whitelist, so let's check if
287 * the template of it might be
290 w = unit_name_template(de->d_name);
294 if (!strv_contains(instance_whitelist, w))
298 p = path_make_absolute(de->d_name, path);
302 q = readlink_and_canonicalize(p, &dest);
313 set_get(remove_symlinks_to, dest) ||
314 set_get(remove_symlinks_to, basename(dest));
319 if (unlink(p) < 0 && errno != ENOENT) {
325 path_kill_slashes(p);
326 rmdir_parents(p, config_path);
327 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, p, NULL);
329 if (!set_get(remove_symlinks_to, p)) {
331 q = mark_symlink_for_removal(&remove_symlinks_to, p);
344 static int remove_marked_symlinks(
345 Set *remove_symlinks_to,
346 const char *config_path,
347 UnitFileChange **changes,
349 char** instance_whitelist) {
351 _cleanup_close_ int fd = -1;
357 if (set_size(remove_symlinks_to) <= 0)
360 fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
368 cfd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
374 /* This takes possession of cfd and closes it */
375 q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes, instance_whitelist);
383 static int find_symlinks_fd(
387 const char *config_path,
388 bool *same_name_link) {
391 _cleanup_closedir_ DIR *d = NULL;
397 assert(same_name_link);
410 if (!de && errno != 0)
416 if (ignore_file(de->d_name))
419 dirent_ensure_type(d, de);
421 if (de->d_type == DT_DIR) {
423 _cleanup_free_ char *p = NULL;
425 nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
435 p = path_make_absolute(de->d_name, path);
441 /* This will close nfd, regardless whether it succeeds or not */
442 q = find_symlinks_fd(name, nfd, p, config_path, same_name_link);
448 } else if (de->d_type == DT_LNK) {
449 _cleanup_free_ char *p = NULL, *dest = NULL;
450 bool found_path, found_dest, b = false;
453 /* Acquire symlink name */
454 p = path_make_absolute(de->d_name, path);
458 /* Acquire symlink destination */
459 q = readlink_and_canonicalize(p, &dest);
469 /* Check if the symlink itself matches what we
471 if (path_is_absolute(name))
472 found_path = path_equal(p, name);
474 found_path = streq(de->d_name, name);
476 /* Check if what the symlink points to
477 * matches what we are looking for */
478 if (path_is_absolute(name))
479 found_dest = path_equal(dest, name);
481 found_dest = streq(basename(dest), name);
483 if (found_path && found_dest) {
484 _cleanup_free_ char *t = NULL;
486 /* Filter out same name links in the main
488 t = path_make_absolute(name, config_path);
492 b = path_equal(t, p);
496 *same_name_link = true;
497 else if (found_path || found_dest)
503 static int find_symlinks(
505 const char *config_path,
506 bool *same_name_link) {
512 assert(same_name_link);
514 fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
521 /* This takes possession of fd and closes it */
522 return find_symlinks_fd(name, fd, config_path, config_path, same_name_link);
525 static int find_symlinks_in_scope(
527 const char *root_dir,
529 UnitFileState *state) {
532 _cleanup_free_ char *path2 = NULL;
533 bool same_name_link_runtime = false, same_name_link = false;
536 assert(scope < _UNIT_FILE_SCOPE_MAX);
539 if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) {
540 _cleanup_free_ char *path = NULL;
542 /* First look in runtime config path */
543 r = get_config_path(scope, true, root_dir, &path);
547 r = find_symlinks(name, path, &same_name_link_runtime);
551 *state = UNIT_FILE_ENABLED_RUNTIME;
556 /* Then look in the normal config path */
557 r = get_config_path(scope, false, root_dir, &path2);
561 r = find_symlinks(name, path2, &same_name_link);
565 *state = UNIT_FILE_ENABLED;
569 /* Hmm, we didn't find it, but maybe we found the same name
571 if (same_name_link_runtime) {
572 *state = UNIT_FILE_LINKED_RUNTIME;
574 } else if (same_name_link) {
575 *state = UNIT_FILE_LINKED;
585 const char *root_dir,
588 UnitFileChange **changes,
589 unsigned *n_changes) {
592 _cleanup_free_ char *prefix = NULL;
596 assert(scope < _UNIT_FILE_SCOPE_MAX);
598 r = get_config_path(scope, runtime, root_dir, &prefix);
602 STRV_FOREACH(i, files) {
603 _cleanup_free_ char *path = NULL;
605 if (!unit_name_is_valid(*i, TEMPLATE_VALID)) {
611 path = path_make_absolute(*i, prefix);
617 if (symlink("/dev/null", path) >= 0) {
618 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
622 if (errno == EEXIST) {
624 if (null_or_empty_path(path) > 0)
628 if (symlink_atomic("/dev/null", path) >= 0) {
629 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
630 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
646 int unit_file_unmask(
649 const char *root_dir,
651 UnitFileChange **changes,
652 unsigned *n_changes) {
654 char **i, *config_path = NULL;
656 Set *remove_symlinks_to = NULL;
659 assert(scope < _UNIT_FILE_SCOPE_MAX);
661 r = get_config_path(scope, runtime, root_dir, &config_path);
665 STRV_FOREACH(i, files) {
668 if (!unit_name_is_valid(*i, TEMPLATE_VALID)) {
674 path = path_make_absolute(*i, config_path);
680 q = null_or_empty_path(path);
682 if (unlink(path) >= 0) {
683 mark_symlink_for_removal(&remove_symlinks_to, path);
684 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
693 if (q != -ENOENT && r == 0)
701 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
705 set_free_free(remove_symlinks_to);
714 const char *root_dir,
717 UnitFileChange **changes,
718 unsigned *n_changes) {
720 _cleanup_lookup_paths_free_ LookupPaths paths = {};
722 _cleanup_free_ char *config_path = NULL;
726 assert(scope < _UNIT_FILE_SCOPE_MAX);
728 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
732 r = get_config_path(scope, runtime, root_dir, &config_path);
736 STRV_FOREACH(i, files) {
737 _cleanup_free_ char *path = NULL;
743 if (!path_is_absolute(*i) ||
744 !unit_name_is_valid(fn, TEMPLATE_VALID)) {
750 if (lstat(*i, &st) < 0) {
756 if (!S_ISREG(st.st_mode)) {
761 q = in_search_path(*i, paths.unit_path);
768 path = path_make_absolute(fn, config_path);
772 if (symlink(*i, path) >= 0) {
773 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
777 if (errno == EEXIST) {
778 _cleanup_free_ char *dest = NULL;
780 q = readlink_and_make_absolute(path, &dest);
781 if (q < 0 && errno != ENOENT) {
787 if (q >= 0 && path_equal(dest, *i))
791 if (symlink_atomic(*i, path) >= 0) {
792 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
793 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
809 void unit_file_list_free(Hashmap *h) {
812 while ((i = hashmap_steal_first(h))) {
820 void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) {
823 assert(changes || n_changes == 0);
828 for (i = 0; i < n_changes; i++) {
829 free(changes[i].path);
830 free(changes[i].source);
836 static void install_info_free(InstallInfo *i) {
841 strv_free(i->aliases);
842 strv_free(i->wanted_by);
843 strv_free(i->required_by);
844 free(i->default_instance);
848 static void install_info_hashmap_free(Hashmap *m) {
854 while ((i = hashmap_steal_first(m)))
855 install_info_free(i);
860 static void install_context_done(InstallContext *c) {
863 install_info_hashmap_free(c->will_install);
864 install_info_hashmap_free(c->have_installed);
866 c->will_install = c->have_installed = NULL;
869 static int install_info_add(
873 InstallInfo *i = NULL;
877 assert(name || path);
880 name = basename(path);
882 if (!unit_name_is_valid(name, TEMPLATE_VALID))
885 if (hashmap_get(c->have_installed, name) ||
886 hashmap_get(c->will_install, name))
889 r = hashmap_ensure_allocated(&c->will_install, string_hash_func, string_compare_func);
893 i = new0(InstallInfo, 1);
897 i->name = strdup(name);
904 i->path = strdup(path);
911 r = hashmap_put(c->will_install, i->name, i);
919 install_info_free(i);
924 static int install_info_add_auto(
926 const char *name_or_path) {
929 assert(name_or_path);
931 if (path_is_absolute(name_or_path))
932 return install_info_add(c, NULL, name_or_path);
934 return install_info_add(c, name_or_path, NULL);
937 static int config_parse_also(
939 const char *filename,
942 unsigned section_line,
950 const char *word, *state;
951 InstallContext *c = data;
957 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
958 _cleanup_free_ char *n;
961 n = strndup(word, l);
965 r = install_info_add(c, n, NULL);
970 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
971 "Trailing garbage, ignoring.");
976 static int config_parse_user(
978 const char *filename,
981 unsigned section_line,
988 InstallInfo *i = data;
996 r = install_full_printf(i, rvalue, &printed);
1006 static int config_parse_default_instance(
1008 const char *filename,
1010 const char *section,
1011 unsigned section_line,
1018 InstallInfo *i = data;
1026 r = install_full_printf(i, rvalue, &printed);
1030 if (!unit_instance_is_valid(printed))
1033 free(i->default_instance);
1034 i->default_instance = printed;
1039 static int unit_file_load(
1043 const char *root_dir,
1044 bool allow_symlink) {
1046 const ConfigTableItem items[] = {
1047 { "Install", "Alias", config_parse_strv, 0, &info->aliases },
1048 { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
1049 { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
1050 { "Install", "DefaultInstance", config_parse_default_instance, 0, info },
1051 { "Install", "Also", config_parse_also, 0, c },
1052 { "Exec", "User", config_parse_user, 0, info },
1056 _cleanup_fclose_ FILE *f = NULL;
1063 if (!isempty(root_dir))
1064 path = strappenda(root_dir, "/", path);
1066 fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|(allow_symlink ? 0 : O_NOFOLLOW));
1070 f = fdopen(fd, "re");
1076 r = config_parse(NULL, path, f,
1078 config_item_table_lookup, items,
1079 true, true, false, info);
1084 (int) strv_length(info->aliases) +
1085 (int) strv_length(info->wanted_by) +
1086 (int) strv_length(info->required_by);
1089 static int unit_file_search(
1093 const char *root_dir,
1094 bool allow_symlink) {
1104 return unit_file_load(c, info, info->path, root_dir, allow_symlink);
1108 STRV_FOREACH(p, paths->unit_path) {
1109 _cleanup_free_ char *path = NULL;
1111 path = strjoin(*p, "/", info->name, NULL);
1115 r = unit_file_load(c, info, path, root_dir, allow_symlink);
1121 if (r != -ENOENT && r != -ELOOP)
1125 if (unit_name_is_instance(info->name)) {
1127 /* Unit file doesn't exist, however instance
1128 * enablement was requested. We will check if it is
1129 * possible to load template unit file. */
1131 _cleanup_free_ char *template = NULL;
1133 template = unit_name_template(info->name);
1137 STRV_FOREACH(p, paths->unit_path) {
1138 _cleanup_free_ char *path = NULL;
1140 path = strjoin(*p, "/", template, NULL);
1144 r = unit_file_load(c, info, path, root_dir, allow_symlink);
1150 if (r != -ENOENT && r != -ELOOP)
1158 static int unit_file_can_install(
1160 const char *root_dir,
1162 bool allow_symlink) {
1164 _cleanup_install_context_done_ InstallContext c = {};
1171 r = install_info_add_auto(&c, name);
1175 assert_se(i = hashmap_first(c.will_install));
1177 r = unit_file_search(&c, i, paths, root_dir, allow_symlink);
1181 (int) strv_length(i->aliases) +
1182 (int) strv_length(i->wanted_by) +
1183 (int) strv_length(i->required_by);
1188 static int create_symlink(
1189 const char *old_path,
1190 const char *new_path,
1192 UnitFileChange **changes,
1193 unsigned *n_changes) {
1195 _cleanup_free_ char *dest = NULL;
1201 mkdir_parents_label(new_path, 0755);
1203 if (symlink(old_path, new_path) >= 0) {
1204 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
1208 if (errno != EEXIST)
1211 r = readlink_and_make_absolute(new_path, &dest);
1215 if (path_equal(dest, old_path))
1221 r = symlink_atomic(old_path, new_path);
1225 add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL);
1226 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
1231 static int install_info_symlink_alias(
1233 const char *config_path,
1235 UnitFileChange **changes,
1236 unsigned *n_changes) {
1242 assert(config_path);
1244 STRV_FOREACH(s, i->aliases) {
1245 _cleanup_free_ char *alias_path = NULL, *dst = NULL;
1247 q = install_full_printf(i, *s, &dst);
1251 alias_path = path_make_absolute(dst, config_path);
1255 q = create_symlink(i->path, alias_path, force, changes, n_changes);
1263 static int install_info_symlink_wants(
1265 const char *config_path,
1269 UnitFileChange **changes,
1270 unsigned *n_changes) {
1272 _cleanup_free_ char *buf = NULL;
1278 assert(config_path);
1280 if (unit_name_is_template(i->name)) {
1282 /* Don't install any symlink if there's no default
1283 * instance configured */
1285 if (!i->default_instance)
1288 buf = unit_name_replace_instance(i->name, i->default_instance);
1296 STRV_FOREACH(s, list) {
1297 _cleanup_free_ char *path = NULL, *dst = NULL;
1299 q = install_full_printf(i, *s, &dst);
1303 if (!unit_name_is_valid(dst, TEMPLATE_VALID)) {
1308 path = strjoin(config_path, "/", dst, suffix, n, NULL);
1312 q = create_symlink(i->path, path, force, changes, n_changes);
1320 static int install_info_symlink_link(
1323 const char *config_path,
1324 const char *root_dir,
1326 UnitFileChange **changes,
1327 unsigned *n_changes) {
1329 _cleanup_free_ char *path = NULL;
1334 assert(config_path);
1337 r = in_search_path(i->path, paths->unit_path);
1341 path = strjoin(config_path, "/", i->name, NULL);
1345 return create_symlink(i->path, path, force, changes, n_changes);
1348 static int install_info_apply(
1351 const char *config_path,
1352 const char *root_dir,
1354 UnitFileChange **changes,
1355 unsigned *n_changes) {
1361 assert(config_path);
1363 r = install_info_symlink_alias(i, config_path, force, changes, n_changes);
1365 q = install_info_symlink_wants(i, config_path, i->wanted_by, ".wants/", force, changes, n_changes);
1369 q = install_info_symlink_wants(i, config_path, i->required_by, ".requires/", force, changes, n_changes);
1373 q = install_info_symlink_link(i, paths, config_path, root_dir, force, changes, n_changes);
1380 static int install_context_apply(
1383 const char *config_path,
1384 const char *root_dir,
1386 UnitFileChange **changes,
1387 unsigned *n_changes) {
1394 assert(config_path);
1396 while ((i = hashmap_first(c->will_install))) {
1398 q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
1402 assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
1404 q = unit_file_search(c, i, paths, root_dir, false);
1413 q = install_info_apply(i, paths, config_path, root_dir, force, changes, n_changes);
1414 if (r >= 0 && q < 0)
1421 static int install_context_mark_for_removal(
1424 Set **remove_symlinks_to,
1425 const char *config_path,
1426 const char *root_dir) {
1433 assert(config_path);
1435 /* Marks all items for removal */
1437 while ((i = hashmap_first(c->will_install))) {
1439 q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
1443 assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
1445 q = unit_file_search(c, i, paths, root_dir, false);
1456 if (unit_name_is_instance(i->name)) {
1460 unit_file = basename(i->path);
1462 if (unit_name_is_instance(unit_file))
1463 /* unit file named as instance exists, thus all symlinks
1464 * pointing to it will be removed */
1465 q = mark_symlink_for_removal(remove_symlinks_to, i->name);
1467 /* does not exist, thus we will mark for removal symlinks
1468 * to template unit file */
1469 q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
1471 /* If i->path is not set, it means that we didn't actually find
1472 * the unit file. But we can still remove symlinks to the
1473 * nonexistent template. */
1474 unit_file = unit_name_template(i->name);
1478 q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
1482 q = mark_symlink_for_removal(remove_symlinks_to, i->name);
1484 if (r >= 0 && q < 0)
1491 int unit_file_enable(
1492 UnitFileScope scope,
1494 const char *root_dir,
1497 UnitFileChange **changes,
1498 unsigned *n_changes) {
1500 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1501 _cleanup_install_context_done_ InstallContext c = {};
1503 _cleanup_free_ char *config_path = NULL;
1507 assert(scope < _UNIT_FILE_SCOPE_MAX);
1509 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1513 r = get_config_path(scope, runtime, root_dir, &config_path);
1517 STRV_FOREACH(i, files) {
1518 r = install_info_add_auto(&c, *i);
1523 /* This will return the number of symlink rules that were
1524 supposed to be created, not the ones actually created. This is
1525 useful to determine whether the passed files had any
1526 installation data at all. */
1528 return install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
1531 int unit_file_disable(
1532 UnitFileScope scope,
1534 const char *root_dir,
1536 UnitFileChange **changes,
1537 unsigned *n_changes) {
1539 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1540 _cleanup_install_context_done_ InstallContext c = {};
1542 _cleanup_free_ char *config_path = NULL;
1543 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
1547 assert(scope < _UNIT_FILE_SCOPE_MAX);
1549 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1553 r = get_config_path(scope, runtime, root_dir, &config_path);
1557 STRV_FOREACH(i, files) {
1558 r = install_info_add_auto(&c, *i);
1563 r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir);
1565 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
1572 int unit_file_reenable(
1573 UnitFileScope scope,
1575 const char *root_dir,
1578 UnitFileChange **changes,
1579 unsigned *n_changes) {
1582 r = unit_file_disable(scope, runtime, root_dir, files,
1583 changes, n_changes);
1587 return unit_file_enable(scope, runtime, root_dir, files, force,
1588 changes, n_changes);
1591 int unit_file_set_default(
1592 UnitFileScope scope,
1593 const char *root_dir,
1596 UnitFileChange **changes,
1597 unsigned *n_changes) {
1599 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1600 _cleanup_install_context_done_ InstallContext c = {};
1601 _cleanup_free_ char *config_path = NULL;
1604 InstallInfo *i = NULL;
1607 assert(scope < _UNIT_FILE_SCOPE_MAX);
1610 if (unit_name_to_type(file) != UNIT_TARGET)
1613 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1617 r = get_config_path(scope, false, root_dir, &config_path);
1621 r = install_info_add_auto(&c, file);
1625 assert_se(i = hashmap_first(c.will_install));
1627 r = unit_file_search(&c, i, &paths, root_dir, false);
1631 path = strappenda(config_path, "/" SPECIAL_DEFAULT_TARGET);
1633 r = create_symlink(i->path, path, force, changes, n_changes);
1640 int unit_file_get_default(
1641 UnitFileScope scope,
1642 const char *root_dir,
1645 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1650 assert(scope < _UNIT_FILE_SCOPE_MAX);
1653 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1657 STRV_FOREACH(p, paths.unit_path) {
1658 _cleanup_free_ char *path = NULL, *tmp = NULL;
1661 path = path_join(root_dir, *p, SPECIAL_DEFAULT_TARGET);
1665 r = readlink_malloc(path, &tmp);
1668 else if (r == -EINVAL)
1670 n = strdup(SPECIAL_DEFAULT_TARGET);
1674 n = strdup(basename(tmp));
1686 UnitFileState unit_file_get_state(
1687 UnitFileScope scope,
1688 const char *root_dir,
1691 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1692 UnitFileState state = _UNIT_FILE_STATE_INVALID;
1694 _cleanup_free_ char *path = NULL;
1698 assert(scope < _UNIT_FILE_SCOPE_MAX);
1701 if (root_dir && scope != UNIT_FILE_SYSTEM)
1704 if (!unit_name_is_valid(name, TEMPLATE_VALID))
1707 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1711 STRV_FOREACH(i, paths.unit_path) {
1718 path = path_join(root_dir, *i, name);
1723 partial = path + strlen(root_dir);
1728 * Search for a unit file in our default paths, to
1729 * be sure, that there are no broken symlinks.
1731 if (lstat(path, &st) < 0) {
1733 if (errno != ENOENT)
1736 if (!unit_name_is_instance(name))
1739 if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
1742 r = null_or_empty_path(path);
1743 if (r < 0 && r != -ENOENT)
1746 state = path_startswith(*i, "/run") ?
1747 UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
1752 r = find_symlinks_in_scope(scope, root_dir, name, &state);
1758 r = unit_file_can_install(&paths, root_dir, partial, true);
1759 if (r < 0 && errno != ENOENT)
1762 return UNIT_FILE_DISABLED;
1764 return UNIT_FILE_STATIC;
1767 return r < 0 ? r : state;
1770 int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char *name) {
1771 _cleanup_strv_free_ char **files = NULL;
1776 assert(scope < _UNIT_FILE_SCOPE_MAX);
1779 if (scope == UNIT_FILE_SYSTEM)
1780 r = conf_files_list(&files, ".preset", root_dir,
1781 "/etc/systemd/system-preset",
1782 "/usr/local/lib/systemd/system-preset",
1783 "/usr/lib/systemd/system-preset",
1784 #ifdef HAVE_SPLIT_USR
1785 "/lib/systemd/system-preset",
1788 else if (scope == UNIT_FILE_GLOBAL)
1789 r = conf_files_list(&files, ".preset", root_dir,
1790 "/etc/systemd/user-preset",
1791 "/usr/local/lib/systemd/user-preset",
1792 "/usr/lib/systemd/user-preset",
1800 STRV_FOREACH(p, files) {
1801 _cleanup_fclose_ FILE *f;
1803 f = fopen(*p, "re");
1805 if (errno == ENOENT)
1812 char line[LINE_MAX], *l;
1814 if (!fgets(line, sizeof(line), f))
1821 if (strchr(COMMENTS "\n", *l))
1824 if (first_word(l, "enable")) {
1826 l += strspn(l, WHITESPACE);
1828 if (fnmatch(l, name, FNM_NOESCAPE) == 0) {
1829 log_debug("Preset file says enable %s.", name);
1833 } else if (first_word(l, "disable")) {
1835 l += strspn(l, WHITESPACE);
1837 if (fnmatch(l, name, FNM_NOESCAPE) == 0) {
1838 log_debug("Preset file says disable %s.", name);
1843 log_debug("Couldn't parse line '%s'", l);
1847 /* Default is "enable" */
1848 log_debug("Preset file doesn't say anything about %s, enabling.", name);
1852 int unit_file_preset(
1853 UnitFileScope scope,
1855 const char *root_dir,
1857 UnitFilePresetMode mode,
1859 UnitFileChange **changes,
1860 unsigned *n_changes) {
1862 _cleanup_install_context_done_ InstallContext plus = {}, minus = {};
1863 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1864 _cleanup_free_ char *config_path = NULL;
1869 assert(scope < _UNIT_FILE_SCOPE_MAX);
1870 assert(mode < _UNIT_FILE_PRESET_MAX);
1872 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1876 r = get_config_path(scope, runtime, root_dir, &config_path);
1880 STRV_FOREACH(i, files) {
1882 if (!unit_name_is_valid(*i, TEMPLATE_VALID))
1885 r = unit_file_query_preset(scope, root_dir, *i);
1889 if (r && mode != UNIT_FILE_PRESET_DISABLE_ONLY)
1890 r = install_info_add_auto(&plus, *i);
1891 else if (!r && mode != UNIT_FILE_PRESET_ENABLE_ONLY)
1892 r = install_info_add_auto(&minus, *i);
1901 if (mode != UNIT_FILE_PRESET_ENABLE_ONLY) {
1902 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
1904 r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir);
1906 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
1911 if (mode != UNIT_FILE_PRESET_DISABLE_ONLY) {
1912 /* Returns number of symlinks that where supposed to be installed. */
1913 q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes);
1921 int unit_file_preset_all(
1922 UnitFileScope scope,
1924 const char *root_dir,
1925 UnitFilePresetMode mode,
1927 UnitFileChange **changes,
1928 unsigned *n_changes) {
1930 _cleanup_install_context_done_ InstallContext plus = {}, minus = {};
1931 _cleanup_lookup_paths_free_ LookupPaths paths = {};
1932 _cleanup_free_ char *config_path = NULL;
1937 assert(scope < _UNIT_FILE_SCOPE_MAX);
1938 assert(mode < _UNIT_FILE_PRESET_MAX);
1940 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
1944 r = get_config_path(scope, runtime, root_dir, &config_path);
1948 STRV_FOREACH(i, paths.unit_path) {
1949 _cleanup_closedir_ DIR *d = NULL;
1950 _cleanup_free_ char *units_dir;
1952 units_dir = path_join(root_dir, *i, NULL);
1956 d = opendir(units_dir);
1958 if (errno == ENOENT)
1969 if (!de && errno != 0)
1975 if (ignore_file(de->d_name))
1978 if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID))
1981 dirent_ensure_type(d, de);
1983 if (de->d_type != DT_REG)
1986 r = unit_file_query_preset(scope, root_dir, de->d_name);
1990 if (r && mode != UNIT_FILE_PRESET_DISABLE_ONLY)
1991 r = install_info_add_auto(&plus, de->d_name);
1992 else if (!r && mode != UNIT_FILE_PRESET_ENABLE_ONLY)
1993 r = install_info_add_auto(&minus, de->d_name);
2003 if (mode != UNIT_FILE_PRESET_ENABLE_ONLY) {
2004 _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
2006 r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir);
2008 q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, NULL);
2013 if (mode != UNIT_FILE_PRESET_DISABLE_ONLY) {
2014 q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes);
2022 static void unitfilelist_free(UnitFileList **f) {
2029 #define _cleanup_unitfilelist_free_ _cleanup_(unitfilelist_free)
2031 int unit_file_get_list(
2032 UnitFileScope scope,
2033 const char *root_dir,
2036 _cleanup_lookup_paths_free_ LookupPaths paths = {};
2041 assert(scope < _UNIT_FILE_SCOPE_MAX);
2044 if (root_dir && scope != UNIT_FILE_SYSTEM)
2047 r = lookup_paths_init_from_scope(&paths, scope, root_dir);
2051 STRV_FOREACH(i, paths.unit_path) {
2052 _cleanup_closedir_ DIR *d = NULL;
2053 _cleanup_free_ char *units_dir;
2055 units_dir = path_join(root_dir, *i, NULL);
2059 d = opendir(units_dir);
2061 if (errno == ENOENT)
2068 _cleanup_unitfilelist_free_ UnitFileList *f = NULL;
2073 if (!de && errno != 0)
2079 if (ignore_file(de->d_name))
2082 if (!unit_name_is_valid(de->d_name, TEMPLATE_VALID))
2085 if (hashmap_get(h, de->d_name))
2088 dirent_ensure_type(d, de);
2090 if (!IN_SET(de->d_type, DT_LNK, DT_REG))
2093 f = new0(UnitFileList, 1);
2097 f->path = path_make_absolute(de->d_name, units_dir);
2101 r = null_or_empty_path(f->path);
2102 if (r < 0 && r != -ENOENT)
2106 path_startswith(*i, "/run") ?
2107 UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
2111 r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state);
2115 f->state = UNIT_FILE_ENABLED;
2119 r = unit_file_can_install(&paths, root_dir, f->path, true);
2120 if (r == -EINVAL || /* Invalid setting? */
2121 r == -EBADMSG || /* Invalid format? */
2122 r == -ENOENT /* Included file not found? */)
2123 f->state = UNIT_FILE_INVALID;
2127 f->state = UNIT_FILE_DISABLED;
2129 f->state = UNIT_FILE_STATIC;
2132 r = hashmap_put(h, basename(f->path), f);
2135 f = NULL; /* prevent cleanup */
2142 static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
2143 [UNIT_FILE_ENABLED] = "enabled",
2144 [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtime",
2145 [UNIT_FILE_LINKED] = "linked",
2146 [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime",
2147 [UNIT_FILE_MASKED] = "masked",
2148 [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
2149 [UNIT_FILE_STATIC] = "static",
2150 [UNIT_FILE_DISABLED] = "disabled",
2151 [UNIT_FILE_INVALID] = "invalid",
2154 DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);
2156 static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = {
2157 [UNIT_FILE_SYMLINK] = "symlink",
2158 [UNIT_FILE_UNLINK] = "unlink",
2161 DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType);
2163 static const char* const unit_file_preset_mode_table[_UNIT_FILE_PRESET_MAX] = {
2164 [UNIT_FILE_PRESET_FULL] = "full",
2165 [UNIT_FILE_PRESET_ENABLE_ONLY] = "enable-only",
2166 [UNIT_FILE_PRESET_DISABLE_ONLY] = "disable-only",
2169 DEFINE_STRING_TABLE_LOOKUP(unit_file_preset_mode, UnitFilePresetMode);