| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2011 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty <of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <fnmatch.h> |
| |
| #include "util.h" |
| #include "hashmap.h" |
| #include "set.h" |
| #include "path-lookup.h" |
| #include "strv.h" |
| #include "unit-name.h" |
| #include "install.h" |
| #include "conf-parser.h" |
| |
| typedef struct { |
| char *name; |
| char *path; |
| |
| char **aliases; |
| char **wanted_by; |
| } InstallInfo; |
| |
| typedef struct { |
| Hashmap *will_install; |
| Hashmap *have_installed; |
| } InstallContext; |
| |
| static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) { |
| assert(paths); |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| zero(*paths); |
| |
| return lookup_paths_init(paths, |
| scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER, |
| scope == UNIT_FILE_USER); |
| } |
| |
| static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) { |
| char *p = NULL; |
| int r; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| assert(ret); |
| |
| switch (scope) { |
| |
| case UNIT_FILE_SYSTEM: |
| |
| if (root_dir && runtime) |
| return -EINVAL; |
| |
| if (runtime) |
| p = strdup("/run/systemd/system"); |
| else if (root_dir) |
| asprintf(&p, "%s/%s", root_dir, SYSTEM_CONFIG_UNIT_PATH); |
| else |
| p = strdup(SYSTEM_CONFIG_UNIT_PATH); |
| |
| break; |
| |
| case UNIT_FILE_GLOBAL: |
| |
| if (root_dir) |
| return -EINVAL; |
| |
| if (runtime) |
| p = strdup("/run/systemd/user"); |
| else |
| p = strdup(USER_CONFIG_UNIT_PATH); |
| break; |
| |
| case UNIT_FILE_USER: |
| |
| if (root_dir || runtime) |
| return -EINVAL; |
| |
| r = user_config_home(&p); |
| if (r <= 0) |
| return r < 0 ? r : -ENOENT; |
| |
| break; |
| |
| default: |
| assert_not_reached("Bad scope"); |
| } |
| |
| if (!p) |
| return -ENOMEM; |
| |
| *ret = p; |
| return 0; |
| } |
| |
| static int add_file_change( |
| UnitFileChange **changes, |
| unsigned *n_changes, |
| UnitFileChangeType type, |
| const char *path, |
| const char *source) { |
| |
| UnitFileChange *c; |
| unsigned i; |
| |
| assert(path); |
| assert(!changes == !n_changes); |
| |
| if (!changes) |
| return 0; |
| |
| c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange)); |
| if (!c) |
| return -ENOMEM; |
| |
| *changes = c; |
| i = *n_changes; |
| |
| c[i].type = type; |
| c[i].path = strdup(path); |
| if (!c[i].path) |
| return -ENOMEM; |
| |
| if (source) { |
| c[i].source = strdup(source); |
| if (!c[i].source) { |
| free(c[i].path); |
| return -ENOMEM; |
| } |
| } else |
| c[i].source = NULL; |
| |
| *n_changes = i+1; |
| return 0; |
| } |
| |
| static int mark_symlink_for_removal( |
| Set **remove_symlinks_to, |
| const char *p) { |
| |
| char *n; |
| int r; |
| |
| assert(p); |
| |
| r = set_ensure_allocated(remove_symlinks_to, string_hash_func, string_compare_func); |
| if (r < 0) |
| return r; |
| |
| n = strdup(p); |
| if (!n) |
| return -ENOMEM; |
| |
| path_kill_slashes(n); |
| |
| r = set_put(*remove_symlinks_to, n); |
| if (r < 0) { |
| free(n); |
| return r == -EEXIST ? 0 : r; |
| } |
| |
| return 0; |
| } |
| |
| static int remove_marked_symlinks_fd( |
| Set *remove_symlinks_to, |
| int fd, |
| const char *path, |
| const char *config_path, |
| bool *deleted, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| int r = 0; |
| DIR *d; |
| struct dirent buffer, *de; |
| |
| assert(remove_symlinks_to); |
| assert(fd >= 0); |
| assert(path); |
| assert(config_path); |
| assert(deleted); |
| |
| d = fdopendir(fd); |
| if (!d) { |
| close_nointr_nofail(fd); |
| return -errno; |
| } |
| |
| rewinddir(d); |
| |
| for (;;) { |
| int k; |
| |
| k = readdir_r(d, &buffer, &de); |
| if (k != 0) { |
| r = -errno; |
| break; |
| } |
| |
| if (!de) |
| break; |
| |
| if (ignore_file(de->d_name)) |
| continue; |
| |
| dirent_ensure_type(d, de); |
| |
| if (de->d_type == DT_DIR) { |
| int nfd, q; |
| char *p; |
| |
| nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); |
| if (nfd < 0) { |
| if (errno == ENOENT) |
| continue; |
| |
| if (r == 0) |
| r = -errno; |
| continue; |
| } |
| |
| p = path_make_absolute(de->d_name, path); |
| if (!p) { |
| close_nointr_nofail(nfd); |
| r = -ENOMEM; |
| break; |
| } |
| |
| /* This will close nfd, regardless whether it succeeds or not */ |
| q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes); |
| free(p); |
| |
| if (r == 0) |
| r = q; |
| |
| } else if (de->d_type == DT_LNK) { |
| char *p, *dest; |
| int q; |
| bool found; |
| |
| p = path_make_absolute(de->d_name, path); |
| if (!p) { |
| r = -ENOMEM; |
| break; |
| } |
| |
| q = readlink_and_canonicalize(p, &dest); |
| if (q < 0) { |
| free(p); |
| |
| if (q == -ENOENT) |
| continue; |
| |
| if (r == 0) |
| r = q; |
| continue; |
| } |
| |
| found = |
| set_get(remove_symlinks_to, dest) || |
| set_get(remove_symlinks_to, file_name_from_path(dest)); |
| |
| if (found) { |
| |
| if (unlink(p) < 0 && errno != ENOENT) { |
| |
| if (r == 0) |
| r = -errno; |
| } else { |
| rmdir_parents(p, config_path); |
| path_kill_slashes(p); |
| |
| add_file_change(changes, n_changes, UNIT_FILE_UNLINK, p, NULL); |
| |
| if (!set_get(remove_symlinks_to, p)) { |
| |
| q = mark_symlink_for_removal(&remove_symlinks_to, p); |
| if (q < 0) { |
| if (r == 0) |
| r = q; |
| } else |
| *deleted = true; |
| } |
| } |
| } |
| |
| free(p); |
| free(dest); |
| } |
| } |
| |
| closedir(d); |
| |
| return r; |
| } |
| |
| static int remove_marked_symlinks( |
| Set *remove_symlinks_to, |
| const char *config_path, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| int fd, r = 0; |
| bool deleted; |
| |
| assert(config_path); |
| |
| if (set_size(remove_symlinks_to) <= 0) |
| return 0; |
| |
| fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); |
| if (fd < 0) |
| return -errno; |
| |
| do { |
| int q, cfd; |
| deleted = false; |
| |
| cfd = dup(fd); |
| if (cfd < 0) { |
| r = -errno; |
| break; |
| } |
| |
| /* This takes possession of cfd and closes it */ |
| q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes); |
| if (r == 0) |
| r = q; |
| } while (deleted); |
| |
| close_nointr_nofail(fd); |
| |
| return r; |
| } |
| |
| static int find_symlinks_fd( |
| const char *name, |
| int fd, |
| const char *path, |
| const char *config_path, |
| bool *same_name_link) { |
| |
| int r = 0; |
| DIR *d; |
| struct dirent buffer, *de; |
| |
| assert(name); |
| assert(fd >= 0); |
| assert(path); |
| assert(config_path); |
| assert(same_name_link); |
| |
| d = fdopendir(fd); |
| if (!d) { |
| close_nointr_nofail(fd); |
| return -errno; |
| } |
| |
| for (;;) { |
| int k; |
| |
| k = readdir_r(d, &buffer, &de); |
| if (k != 0) { |
| r = -errno; |
| break; |
| } |
| |
| if (!de) |
| break; |
| |
| if (ignore_file(de->d_name)) |
| continue; |
| |
| dirent_ensure_type(d, de); |
| |
| if (de->d_type == DT_DIR) { |
| int nfd, q; |
| char *p; |
| |
| nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); |
| if (nfd < 0) { |
| if (errno == ENOENT) |
| continue; |
| |
| if (r == 0) |
| r = -errno; |
| continue; |
| } |
| |
| p = path_make_absolute(de->d_name, path); |
| if (!p) { |
| close_nointr_nofail(nfd); |
| r = -ENOMEM; |
| break; |
| } |
| |
| /* This will close nfd, regardless whether it succeeds or not */ |
| q = find_symlinks_fd(name, nfd, p, config_path, same_name_link); |
| free(p); |
| |
| if (q > 0) { |
| r = 1; |
| break; |
| } |
| |
| if (r == 0) |
| r = q; |
| |
| } else if (de->d_type == DT_LNK) { |
| char *p, *dest; |
| bool found_path, found_dest, b = false; |
| int q; |
| |
| /* Acquire symlink name */ |
| p = path_make_absolute(de->d_name, path); |
| if (!p) { |
| r = -ENOMEM; |
| break; |
| } |
| |
| /* Acquire symlink destination */ |
| q = readlink_and_canonicalize(p, &dest); |
| if (q < 0) { |
| free(p); |
| |
| if (q == -ENOENT) |
| continue; |
| |
| if (r == 0) |
| r = q; |
| continue; |
| } |
| |
| /* Check if the symlink itself matches what we |
| * are looking for */ |
| if (path_is_absolute(name)) |
| found_path = path_equal(p, name); |
| else |
| found_path = streq(de->d_name, name); |
| |
| /* Check if what the symlink points to |
| * matches what we are looking for */ |
| if (path_is_absolute(name)) |
| found_dest = path_equal(dest, name); |
| else |
| found_dest = streq(file_name_from_path(dest), name); |
| |
| free(dest); |
| |
| if (found_path && found_dest) { |
| char *t; |
| |
| /* Filter out same name links in the main |
| * config path */ |
| t = path_make_absolute(name, config_path); |
| if (!t) { |
| free(p); |
| free(dest); |
| r = -ENOMEM; |
| break; |
| } |
| |
| b = path_equal(t, p); |
| free(t); |
| } |
| |
| free(p); |
| |
| if (b) |
| *same_name_link = true; |
| else if (found_path || found_dest) { |
| r = 1; |
| break; |
| } |
| } |
| } |
| |
| closedir(d); |
| |
| return r; |
| } |
| |
| static int find_symlinks( |
| const char *name, |
| const char *config_path, |
| bool *same_name_link) { |
| |
| int fd; |
| |
| assert(name); |
| assert(config_path); |
| assert(same_name_link); |
| |
| fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); |
| if (fd < 0) |
| return -errno; |
| |
| /* This takes possession of fd and closes it */ |
| return find_symlinks_fd(name, fd, config_path, config_path, same_name_link); |
| } |
| |
| static int find_symlinks_in_scope( |
| UnitFileScope scope, |
| const char *root_dir, |
| const char *name, |
| UnitFileState *state) { |
| |
| int r; |
| char *path; |
| bool same_name_link_runtime = false, same_name_link = false; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| assert(name); |
| |
| if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) { |
| |
| /* First look in runtime config path */ |
| r = get_config_path(scope, true, root_dir, &path); |
| if (r < 0) |
| return r; |
| |
| r = find_symlinks(name, path, &same_name_link_runtime); |
| free(path); |
| |
| if (r < 0) |
| return r; |
| else if (r > 0) { |
| *state = UNIT_FILE_ENABLED_RUNTIME; |
| return r; |
| } |
| } |
| |
| /* Then look in the normal config path */ |
| r = get_config_path(scope, false, root_dir, &path); |
| if (r < 0) |
| return r; |
| |
| r = find_symlinks(name, path, &same_name_link); |
| free(path); |
| |
| if (r < 0) |
| return r; |
| else if (r > 0) { |
| *state = UNIT_FILE_ENABLED; |
| return r; |
| } |
| |
| /* Hmm, we didn't find it, but maybe we found the same name |
| * link? */ |
| if (same_name_link_runtime) { |
| *state = UNIT_FILE_LINKED_RUNTIME; |
| return 1; |
| } else if (same_name_link) { |
| *state = UNIT_FILE_LINKED; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| int unit_file_mask( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| char **i, *prefix; |
| int r; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| r = get_config_path(scope, runtime, root_dir, &prefix); |
| if (r < 0) |
| return r; |
| |
| STRV_FOREACH(i, files) { |
| char *path; |
| |
| if (!unit_name_is_valid_no_type(*i, true)) { |
| if (r == 0) |
| r = -EINVAL; |
| continue; |
| } |
| |
| path = path_make_absolute(*i, prefix); |
| if (!path) { |
| r = -ENOMEM; |
| break; |
| } |
| |
| if (symlink("/dev/null", path) >= 0) { |
| add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null"); |
| |
| free(path); |
| continue; |
| } |
| |
| if (errno == EEXIST) { |
| |
| if (null_or_empty_path(path) > 0) { |
| free(path); |
| continue; |
| } |
| |
| if (force) { |
| unlink(path); |
| |
| if (symlink("/dev/null", path) >= 0) { |
| |
| add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL); |
| add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null"); |
| |
| free(path); |
| continue; |
| } |
| } |
| |
| if (r == 0) |
| r = -EEXIST; |
| } else { |
| if (r == 0) |
| r = -errno; |
| } |
| |
| free(path); |
| } |
| |
| free(prefix); |
| |
| return r; |
| } |
| |
| int unit_file_unmask( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| char **i, *config_path = NULL; |
| int r, q; |
| Set *remove_symlinks_to = NULL; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| r = get_config_path(scope, runtime, root_dir, &config_path); |
| if (r < 0) |
| goto finish; |
| |
| STRV_FOREACH(i, files) { |
| char *path; |
| |
| if (!unit_name_is_valid_no_type(*i, true)) { |
| if (r == 0) |
| r = -EINVAL; |
| continue; |
| } |
| |
| path = path_make_absolute(*i, config_path); |
| if (!path) { |
| r = -ENOMEM; |
| break; |
| } |
| |
| q = null_or_empty_path(path); |
| if (q > 0) { |
| if (unlink(path) >= 0) { |
| mark_symlink_for_removal(&remove_symlinks_to, path); |
| add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL); |
| |
| free(path); |
| continue; |
| } |
| |
| q = -errno; |
| } |
| |
| if (q != -ENOENT && r == 0) |
| r = q; |
| |
| free(path); |
| } |
| |
| |
| finish: |
| q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| set_free_free(remove_symlinks_to); |
| free(config_path); |
| |
| return r; |
| } |
| |
| int unit_file_link( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| LookupPaths paths; |
| char **i, *config_path = NULL; |
| int r, q; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| zero(paths); |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| r = get_config_path(scope, runtime, root_dir, &config_path); |
| if (r < 0) |
| goto finish; |
| |
| STRV_FOREACH(i, files) { |
| char *path, *fn; |
| struct stat st; |
| |
| fn = file_name_from_path(*i); |
| |
| if (!path_is_absolute(*i) || |
| !unit_name_is_valid_no_type(fn, true)) { |
| if (r == 0) |
| r = -EINVAL; |
| continue; |
| } |
| |
| if (lstat(*i, &st) < 0) { |
| if (r == 0) |
| r = -errno; |
| continue; |
| } |
| |
| if (!S_ISREG(st.st_mode)) { |
| r = -ENOENT; |
| continue; |
| } |
| |
| q = in_search_path(*i, paths.unit_path); |
| if (q < 0) { |
| r = q; |
| break; |
| } |
| |
| if (q > 0) |
| continue; |
| |
| path = path_make_absolute(fn, config_path); |
| if (!path) { |
| r = -ENOMEM; |
| break; |
| } |
| |
| if (symlink(*i, path) >= 0) { |
| add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i); |
| |
| free(path); |
| continue; |
| } |
| |
| if (errno == EEXIST) { |
| char *dest = NULL; |
| |
| q = readlink_and_make_absolute(path, &dest); |
| |
| if (q < 0 && errno != ENOENT) { |
| free(path); |
| |
| if (r == 0) |
| r = q; |
| |
| continue; |
| } |
| |
| if (q >= 0 && path_equal(dest, *i)) { |
| free(dest); |
| free(path); |
| continue; |
| } |
| |
| free(dest); |
| |
| if (force) { |
| unlink(path); |
| |
| if (symlink(*i, path) >= 0) { |
| |
| add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL); |
| add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i); |
| |
| free(path); |
| continue; |
| } |
| } |
| |
| if (r == 0) |
| r = -EEXIST; |
| } else { |
| if (r == 0) |
| r = -errno; |
| } |
| |
| free(path); |
| } |
| |
| finish: |
| lookup_paths_free(&paths); |
| free(config_path); |
| |
| return r; |
| } |
| |
| void unit_file_list_free(Hashmap *h) { |
| UnitFileList *i; |
| |
| while ((i = hashmap_steal_first(h))) { |
| free(i->path); |
| free(i); |
| } |
| |
| hashmap_free(h); |
| } |
| |
| void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) { |
| unsigned i; |
| |
| assert(changes || n_changes == 0); |
| |
| if (!changes) |
| return; |
| |
| for (i = 0; i < n_changes; i++) { |
| free(changes[i].path); |
| free(changes[i].source); |
| } |
| |
| free(changes); |
| } |
| |
| static void install_info_free(InstallInfo *i) { |
| assert(i); |
| |
| free(i->name); |
| free(i->path); |
| strv_free(i->aliases); |
| strv_free(i->wanted_by); |
| free(i); |
| } |
| |
| static void install_info_hashmap_free(Hashmap *m) { |
| InstallInfo *i; |
| |
| if (!m) |
| return; |
| |
| while ((i = hashmap_steal_first(m))) |
| install_info_free(i); |
| |
| hashmap_free(m); |
| } |
| |
| static void install_context_done(InstallContext *c) { |
| assert(c); |
| |
| install_info_hashmap_free(c->will_install); |
| install_info_hashmap_free(c->have_installed); |
| |
| c->will_install = c->have_installed = NULL; |
| } |
| |
| static int install_info_add( |
| InstallContext *c, |
| const char *name, |
| const char *path) { |
| InstallInfo *i = NULL; |
| int r; |
| |
| assert(c); |
| assert(name || path); |
| |
| if (!name) |
| name = file_name_from_path(path); |
| |
| if (!unit_name_is_valid_no_type(name, true)) |
| return -EINVAL; |
| |
| if (hashmap_get(c->have_installed, name) || |
| hashmap_get(c->will_install, name)) |
| return 0; |
| |
| r = hashmap_ensure_allocated(&c->will_install, string_hash_func, string_compare_func); |
| if (r < 0) |
| return r; |
| |
| i = new0(InstallInfo, 1); |
| if (!i) |
| return -ENOMEM; |
| |
| i->name = strdup(name); |
| if (!i->name) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| |
| if (path) { |
| i->path = strdup(path); |
| if (!i->path) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| } |
| |
| r = hashmap_put(c->will_install, i->name, i); |
| if (r < 0) |
| goto fail; |
| |
| return 0; |
| |
| fail: |
| if (i) |
| install_info_free(i); |
| |
| return r; |
| } |
| |
| static int install_info_add_auto( |
| InstallContext *c, |
| const char *name_or_path) { |
| |
| assert(c); |
| assert(name_or_path); |
| |
| if (path_is_absolute(name_or_path)) |
| return install_info_add(c, NULL, name_or_path); |
| else |
| return install_info_add(c, name_or_path, NULL); |
| } |
| |
| static int config_parse_also( |
| const char *filename, |
| unsigned line, |
| const char *section, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| char *w; |
| size_t l; |
| char *state; |
| InstallContext *c = data; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| FOREACH_WORD_QUOTED(w, l, rvalue, state) { |
| char *n; |
| int r; |
| |
| n = strndup(w, l); |
| if (!n) |
| return -ENOMEM; |
| |
| r = install_info_add(c, n, NULL); |
| if (r < 0) { |
| free(n); |
| return r; |
| } |
| |
| free(n); |
| } |
| |
| return 0; |
| } |
| |
| static int unit_file_load( |
| InstallContext *c, |
| InstallInfo *info, |
| const char *path, |
| bool allow_symlink) { |
| |
| const ConfigTableItem items[] = { |
| { "Install", "Alias", config_parse_strv, 0, &info->aliases }, |
| { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by }, |
| { "Install", "Also", config_parse_also, 0, c }, |
| { NULL, NULL, NULL, 0, NULL } |
| }; |
| |
| int fd; |
| FILE *f; |
| int r; |
| |
| assert(c); |
| assert(info); |
| assert(path); |
| |
| fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|(allow_symlink ? 0 : O_NOFOLLOW)); |
| if (fd < 0) |
| return -errno; |
| |
| f = fdopen(fd, "re"); |
| if (!f) { |
| close_nointr_nofail(fd); |
| return -ENOMEM; |
| } |
| |
| r = config_parse(path, f, NULL, config_item_table_lookup, (void*) items, true, info); |
| fclose(f); |
| if (r < 0) |
| return r; |
| |
| return strv_length(info->aliases) + strv_length(info->wanted_by); |
| } |
| |
| static int unit_file_search( |
| InstallContext *c, |
| InstallInfo *info, |
| LookupPaths *paths, |
| const char *root_dir, |
| bool allow_symlink) { |
| |
| char **p; |
| int r; |
| |
| assert(c); |
| assert(info); |
| assert(paths); |
| |
| if (info->path) |
| return unit_file_load(c, info, info->path, allow_symlink); |
| |
| assert(info->name); |
| |
| STRV_FOREACH(p, paths->unit_path) { |
| char *path = NULL; |
| |
| if (isempty(root_dir)) |
| asprintf(&path, "%s/%s", *p, info->name); |
| else |
| asprintf(&path, "%s/%s/%s", root_dir, *p, info->name); |
| |
| if (!path) |
| return -ENOMEM; |
| |
| r = unit_file_load(c, info, path, allow_symlink); |
| |
| if (r >= 0) |
| info->path = path; |
| else |
| free(path); |
| |
| if (r != -ENOENT && r != -ELOOP) |
| return r; |
| } |
| |
| return -ENOENT; |
| } |
| |
| static int unit_file_can_install( |
| LookupPaths *paths, |
| const char *root_dir, |
| const char *name, |
| bool allow_symlink) { |
| |
| InstallContext c; |
| InstallInfo *i; |
| int r; |
| |
| assert(paths); |
| assert(name); |
| |
| zero(c); |
| |
| r = install_info_add_auto(&c, name); |
| if (r < 0) |
| return r; |
| |
| assert_se(i = hashmap_first(c.will_install)); |
| |
| r = unit_file_search(&c, i, paths, root_dir, allow_symlink); |
| |
| if (r >= 0) |
| r = strv_length(i->aliases) + strv_length(i->wanted_by); |
| |
| install_context_done(&c); |
| |
| return r; |
| } |
| |
| static int create_symlink( |
| const char *old_path, |
| const char *new_path, |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| char *dest; |
| int r; |
| |
| assert(old_path); |
| assert(new_path); |
| |
| mkdir_parents(new_path, 0755); |
| |
| if (symlink(old_path, new_path) >= 0) { |
| add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path); |
| return 0; |
| } |
| |
| if (errno != EEXIST) |
| return -errno; |
| |
| r = readlink_and_make_absolute(new_path, &dest); |
| if (r < 0) |
| return r; |
| |
| if (path_equal(dest, old_path)) { |
| free(dest); |
| return 0; |
| } |
| |
| free(dest); |
| |
| if (force) |
| return -EEXIST; |
| |
| unlink(new_path); |
| |
| if (symlink(old_path, new_path) >= 0) { |
| add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL); |
| add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path); |
| return 0; |
| } |
| |
| return -errno; |
| } |
| |
| static int install_info_symlink_alias( |
| InstallInfo *i, |
| const char *config_path, |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| char **s; |
| int r = 0, q; |
| |
| assert(i); |
| assert(config_path); |
| |
| STRV_FOREACH(s, i->aliases) { |
| char *alias_path; |
| |
| alias_path = path_make_absolute(*s, config_path); |
| |
| if (!alias_path) |
| return -ENOMEM; |
| |
| q = create_symlink(i->path, alias_path, force, changes, n_changes); |
| free(alias_path); |
| |
| if (r == 0) |
| r = q; |
| } |
| |
| return r; |
| } |
| |
| static int install_info_symlink_wants( |
| InstallInfo *i, |
| const char *config_path, |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| char **s; |
| int r = 0, q; |
| |
| assert(i); |
| assert(config_path); |
| |
| STRV_FOREACH(s, i->wanted_by) { |
| char *path; |
| |
| if (!unit_name_is_valid_no_type(*s, true)) { |
| r = -EINVAL; |
| continue; |
| } |
| |
| if (asprintf(&path, "%s/%s.wants/%s", config_path, *s, i->name) < 0) |
| return -ENOMEM; |
| |
| q = create_symlink(i->path, path, force, changes, n_changes); |
| free(path); |
| |
| if (r == 0) |
| r = q; |
| } |
| |
| return r; |
| } |
| |
| static int install_info_symlink_link( |
| InstallInfo *i, |
| LookupPaths *paths, |
| const char *config_path, |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| int r; |
| char *path; |
| |
| assert(i); |
| assert(paths); |
| assert(config_path); |
| assert(i->path); |
| |
| r = in_search_path(i->path, paths->unit_path); |
| if (r != 0) |
| return r; |
| |
| if (asprintf(&path, "%s/%s", config_path, i->name) < 0) |
| return -ENOMEM; |
| |
| r = create_symlink(i->path, path, force, changes, n_changes); |
| free(path); |
| |
| return r; |
| } |
| |
| static int install_info_apply( |
| InstallInfo *i, |
| LookupPaths *paths, |
| const char *config_path, |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| int r, q; |
| |
| assert(i); |
| assert(paths); |
| assert(config_path); |
| |
| r = install_info_symlink_alias(i, config_path, force, changes, n_changes); |
| |
| q = install_info_symlink_wants(i, config_path, force, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| q = install_info_symlink_link(i, paths, config_path, force, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| return r; |
| } |
| |
| static int install_context_apply( |
| InstallContext *c, |
| LookupPaths *paths, |
| const char *config_path, |
| const char *root_dir, |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| InstallInfo *i; |
| int r = 0, q; |
| |
| assert(c); |
| assert(paths); |
| assert(config_path); |
| |
| while ((i = hashmap_first(c->will_install))) { |
| |
| q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func); |
| if (q < 0) |
| return q; |
| |
| assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0); |
| |
| q = unit_file_search(c, i, paths, root_dir, false); |
| if (q < 0) { |
| if (r >= 0) |
| r = q; |
| |
| return r; |
| } else if (r >= 0) |
| r += q; |
| |
| q = install_info_apply(i, paths, config_path, force, changes, n_changes); |
| if (r >= 0 && q < 0) |
| r = q; |
| } |
| |
| return r; |
| } |
| |
| static int install_context_mark_for_removal( |
| InstallContext *c, |
| LookupPaths *paths, |
| Set **remove_symlinks_to, |
| const char *config_path, |
| const char *root_dir) { |
| |
| InstallInfo *i; |
| int r = 0, q; |
| |
| assert(c); |
| assert(paths); |
| assert(config_path); |
| |
| /* Marks all items for removal */ |
| |
| while ((i = hashmap_first(c->will_install))) { |
| |
| q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func); |
| if (q < 0) |
| return q; |
| |
| assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0); |
| |
| q = unit_file_search(c, i, paths, root_dir, false); |
| if (q < 0) { |
| if (r >= 0) |
| r = q; |
| |
| return r; |
| } else if (r >= 0) |
| r += q; |
| |
| q = mark_symlink_for_removal(remove_symlinks_to, i->name); |
| if (r >= 0 && q < 0) |
| r = q; |
| } |
| |
| return r; |
| } |
| |
| int unit_file_enable( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| LookupPaths paths; |
| InstallContext c; |
| char **i, *config_path = NULL; |
| int r; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| zero(paths); |
| zero(c); |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| r = get_config_path(scope, runtime, root_dir, &config_path); |
| if (r < 0) |
| goto finish; |
| |
| STRV_FOREACH(i, files) { |
| r = install_info_add_auto(&c, *i); |
| if (r < 0) |
| goto finish; |
| } |
| |
| /* This will return the number of symlink rules that were |
| supposed to be created, not the ones actually created. This is |
| useful to determine whether the passed files hat any |
| installation data at all. */ |
| r = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes); |
| |
| finish: |
| install_context_done(&c); |
| lookup_paths_free(&paths); |
| free(config_path); |
| |
| return r; |
| } |
| |
| int unit_file_disable( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| LookupPaths paths; |
| InstallContext c; |
| char **i, *config_path = NULL; |
| Set *remove_symlinks_to = NULL; |
| int r, q; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| zero(paths); |
| zero(c); |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| r = get_config_path(scope, runtime, root_dir, &config_path); |
| if (r < 0) |
| goto finish; |
| |
| STRV_FOREACH(i, files) { |
| r = install_info_add_auto(&c, *i); |
| if (r < 0) |
| goto finish; |
| } |
| |
| r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir); |
| |
| q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| finish: |
| install_context_done(&c); |
| lookup_paths_free(&paths); |
| set_free_free(remove_symlinks_to); |
| free(config_path); |
| |
| return r; |
| } |
| |
| int unit_file_reenable( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| LookupPaths paths; |
| InstallContext c; |
| char **i, *config_path = NULL; |
| Set *remove_symlinks_to = NULL; |
| int r, q; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| zero(paths); |
| zero(c); |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| r = get_config_path(scope, runtime, root_dir, &config_path); |
| if (r < 0) |
| goto finish; |
| |
| STRV_FOREACH(i, files) { |
| r = mark_symlink_for_removal(&remove_symlinks_to, *i); |
| if (r < 0) |
| goto finish; |
| |
| r = install_info_add_auto(&c, *i); |
| if (r < 0) |
| goto finish; |
| } |
| |
| r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); |
| |
| /* Returns number of symlinks that where supposed to be installed. */ |
| q = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| finish: |
| lookup_paths_free(&paths); |
| install_context_done(&c); |
| set_free_free(remove_symlinks_to); |
| free(config_path); |
| |
| return r; |
| } |
| |
| UnitFileState unit_file_get_state( |
| UnitFileScope scope, |
| const char *root_dir, |
| const char *name) { |
| |
| LookupPaths paths; |
| UnitFileState state = _UNIT_FILE_STATE_INVALID; |
| char **i, *path = NULL; |
| int r; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| assert(name); |
| |
| zero(paths); |
| |
| if (root_dir && scope != UNIT_FILE_SYSTEM) |
| return -EINVAL; |
| |
| if (!unit_name_is_valid_no_type(name, true)) |
| return -EINVAL; |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| STRV_FOREACH(i, paths.unit_path) { |
| struct stat st; |
| |
| free(path); |
| path = NULL; |
| |
| if (root_dir) |
| asprintf(&path, "%s/%s/%s", root_dir, *i, name); |
| else |
| asprintf(&path, "%s/%s", *i, name); |
| |
| if (!path) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| if (lstat(path, &st) < 0) { |
| if (errno == ENOENT) |
| continue; |
| |
| r = -errno; |
| goto finish; |
| } |
| |
| if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode)) { |
| r = -ENOENT; |
| goto finish; |
| } |
| |
| r = null_or_empty_path(path); |
| if (r < 0 && r != -ENOENT) |
| goto finish; |
| else if (r > 0) { |
| state = path_startswith(*i, "/run") ? |
| UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED; |
| r = 0; |
| goto finish; |
| } |
| |
| r = find_symlinks_in_scope(scope, root_dir, name, &state); |
| if (r < 0) { |
| goto finish; |
| } else if (r > 0) { |
| r = 0; |
| goto finish; |
| } |
| |
| r = unit_file_can_install(&paths, root_dir, path, true); |
| if (r < 0 && errno != -ENOENT) |
| goto finish; |
| else if (r > 0) { |
| state = UNIT_FILE_DISABLED; |
| r = 0; |
| goto finish; |
| } else if (r == 0) { |
| state = UNIT_FILE_STATIC; |
| r = 0; |
| goto finish; |
| } |
| } |
| |
| finish: |
| lookup_paths_free(&paths); |
| free(path); |
| |
| return r < 0 ? r : state; |
| } |
| |
| int unit_file_query_preset(UnitFileScope scope, const char *name) { |
| char **files, **i; |
| int r; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| assert(name); |
| |
| if (scope == UNIT_FILE_SYSTEM) |
| r = conf_files_list(&files, ".preset", |
| "/etc/systemd/system.preset", |
| "/usr/local/lib/systemd/system.preset", |
| "/usr/lib/systemd/system.preset", |
| "/lib/systemd/system.preset", |
| NULL); |
| else if (scope == UNIT_FILE_GLOBAL) |
| r = conf_files_list(&files, ".preset", |
| "/etc/systemd/user.preset", |
| "/usr/local/lib/systemd/user.preset", |
| "/usr/lib/systemd/user.preset", |
| NULL); |
| else |
| return 1; |
| |
| if (r < 0) |
| return r; |
| |
| STRV_FOREACH(i, files) { |
| FILE *f; |
| |
| f = fopen(*i, "re"); |
| if (!f) { |
| if (errno == ENOENT) |
| continue; |
| |
| r = -errno; |
| goto finish; |
| } |
| |
| for (;;) { |
| char line[LINE_MAX], *l; |
| |
| if (!fgets(line, sizeof(line), f)) |
| break; |
| |
| l = strstrip(line); |
| if (!*l) |
| continue; |
| |
| if (strchr(COMMENTS, *l)) |
| continue; |
| |
| if (first_word(l, "enable")) { |
| l += 6; |
| l += strspn(l, WHITESPACE); |
| |
| if (fnmatch(l, name, FNM_NOESCAPE) == 0) { |
| r = 1; |
| fclose(f); |
| goto finish; |
| } |
| } else if (first_word(l, "disable")) { |
| l += 7; |
| l += strspn(l, WHITESPACE); |
| |
| if (fnmatch(l, name, FNM_NOESCAPE) == 0) { |
| r = 0; |
| fclose(f); |
| goto finish; |
| } |
| } else |
| log_debug("Couldn't parse line '%s'", l); |
| } |
| |
| fclose(f); |
| } |
| |
| /* Default is "enable" */ |
| r = 1; |
| |
| finish: |
| strv_free(files); |
| |
| return r; |
| } |
| |
| int unit_file_preset( |
| UnitFileScope scope, |
| bool runtime, |
| const char *root_dir, |
| char *files[], |
| bool force, |
| UnitFileChange **changes, |
| unsigned *n_changes) { |
| |
| LookupPaths paths; |
| InstallContext plus, minus; |
| char **i, *config_path = NULL; |
| Set *remove_symlinks_to = NULL; |
| int r, q; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| |
| zero(paths); |
| zero(plus); |
| zero(minus); |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| r = get_config_path(scope, runtime, root_dir, &config_path); |
| if (r < 0) |
| goto finish; |
| |
| STRV_FOREACH(i, files) { |
| |
| if (!unit_name_is_valid_no_type(*i, true)) { |
| r = -EINVAL; |
| goto finish; |
| } |
| |
| r = unit_file_query_preset(scope, *i); |
| if (r < 0) |
| goto finish; |
| |
| if (r) |
| r = install_info_add_auto(&plus, *i); |
| else |
| r = install_info_add_auto(&minus, *i); |
| |
| if (r < 0) |
| goto finish; |
| } |
| |
| r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir); |
| |
| q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| /* Returns number of symlinks that where supposed to be installed. */ |
| q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes); |
| if (r == 0) |
| r = q; |
| |
| finish: |
| lookup_paths_free(&paths); |
| install_context_done(&plus); |
| install_context_done(&minus); |
| set_free_free(remove_symlinks_to); |
| free(config_path); |
| |
| return r; |
| } |
| |
| int unit_file_get_list( |
| UnitFileScope scope, |
| const char *root_dir, |
| Hashmap *h) { |
| |
| LookupPaths paths; |
| char **i, *buf = NULL; |
| DIR *d = NULL; |
| int r; |
| |
| assert(scope >= 0); |
| assert(scope < _UNIT_FILE_SCOPE_MAX); |
| assert(h); |
| |
| zero(paths); |
| |
| if (root_dir && scope != UNIT_FILE_SYSTEM) |
| return -EINVAL; |
| |
| r = lookup_paths_init_from_scope(&paths, scope); |
| if (r < 0) |
| return r; |
| |
| STRV_FOREACH(i, paths.unit_path) { |
| struct dirent buffer, *de; |
| const char *units_dir; |
| |
| free(buf); |
| buf = NULL; |
| |
| if (root_dir) { |
| if (asprintf(&buf, "%s/%s", root_dir, *i) < 0) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| units_dir = buf; |
| } else |
| units_dir = *i; |
| |
| if (d) |
| closedir(d); |
| |
| d = opendir(units_dir); |
| if (!d) { |
| if (errno == ENOENT) |
| continue; |
| |
| r = -errno; |
| goto finish; |
| } |
| |
| for (;;) { |
| UnitFileList *f; |
| |
| r = readdir_r(d, &buffer, &de); |
| if (r != 0) { |
| r = -r; |
| goto finish; |
| } |
| |
| if (!de) |
| break; |
| |
| if (ignore_file(de->d_name)) |
| continue; |
| |
| if (!unit_name_is_valid_no_type(de->d_name, true)) |
| continue; |
| |
| if (hashmap_get(h, de->d_name)) |
| continue; |
| |
| r = dirent_ensure_type(d, de); |
| if (r < 0) { |
| if (errno == ENOENT) |
| continue; |
| |
| goto finish; |
| } |
| |
| if (de->d_type != DT_LNK && de->d_type != DT_REG) |
| continue; |
| |
| f = new0(UnitFileList, 1); |
| if (!f) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| f->path = path_make_absolute(de->d_name, units_dir); |
| if (!f->path) { |
| free(f); |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| r = null_or_empty_path(f->path); |
| if (r < 0 && r != -ENOENT) { |
| free(f->path); |
| free(f); |
| goto finish; |
| } else if (r > 0) { |
| f->state = |
| path_startswith(*i, "/run") ? |
| UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED; |
| goto found; |
| } |
| |
| r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state); |
| if (r < 0) { |
| free(f->path); |
| free(f); |
| goto finish; |
| } else if (r > 0) |
| goto found; |
| |
| r = unit_file_can_install(&paths, root_dir, f->path, true); |
| if (r < 0) { |
| free(f->path); |
| free(f); |
| goto finish; |
| } else if (r > 0) { |
| f->state = UNIT_FILE_DISABLED; |
| goto found; |
| } else if (r == 0) { |
| f->state = UNIT_FILE_STATIC; |
| goto found; |
| } |
| |
| free(f->path); |
| free(f); |
| continue; |
| |
| found: |
| r = hashmap_put(h, file_name_from_path(f->path), f); |
| if (r < 0) { |
| free(f->path); |
| free(f); |
| goto finish; |
| } |
| } |
| } |
| |
| finish: |
| lookup_paths_free(&paths); |
| free(buf); |
| |
| if (d) |
| closedir(d); |
| |
| return r; |
| } |
| |
| static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = { |
| [UNIT_FILE_ENABLED] = "enabled", |
| [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtie", |
| [UNIT_FILE_LINKED] = "linked", |
| [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime", |
| [UNIT_FILE_MASKED] = "masked", |
| [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime", |
| [UNIT_FILE_STATIC] = "static", |
| [UNIT_FILE_DISABLED] = "disabled" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState); |
| |
| static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = { |
| [UNIT_FILE_SYMLINK] = "symlink", |
| [UNIT_FILE_UNLINK] = "unlink", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType); |