chiark / gitweb /
core: move ManagerRunningAs to shared
[elogind.git] / src / shared / install.c
index 560bb24a93762f3a866d6abfa531fbcffa68e174..f30bf8317b802cb171193ec5f0ae6f862d48cf6c 100644 (file)
@@ -43,6 +43,7 @@ typedef struct {
 
         char **aliases;
         char **wanted_by;
+        char **required_by;
 } InstallInfo;
 
 typedef struct {
@@ -58,8 +59,9 @@ static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope)
         zero(*paths);
 
         return lookup_paths_init(paths,
-                                 scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER,
-                                 scope == UNIT_FILE_USER);
+                                 scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
+                                 scope == UNIT_FILE_USER,
+                                 NULL, NULL, NULL);
 }
 
 static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
@@ -194,7 +196,8 @@ static int remove_marked_symlinks_fd(
                 const char *config_path,
                 bool *deleted,
                 UnitFileChange **changes,
-                unsigned *n_changes) {
+                unsigned *n_changes,
+                char** files) {
 
         int r = 0;
         DIR *d;
@@ -253,7 +256,7 @@ static int remove_marked_symlinks_fd(
                         }
 
                         /* 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);
+                        q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes, files);
                         free(p);
 
                         if (r == 0)
@@ -286,6 +289,9 @@ static int remove_marked_symlinks_fd(
                                 set_get(remove_symlinks_to, dest) ||
                                 set_get(remove_symlinks_to, path_get_file_name(dest));
 
+                        if (unit_name_is_instance(p))
+                                found = found && strv_contains(files, path_get_file_name(p));
+
                         if (found) {
 
                                 if (unlink(p) < 0 && errno != ENOENT) {
@@ -324,7 +330,8 @@ static int remove_marked_symlinks(
                 Set *remove_symlinks_to,
                 const char *config_path,
                 UnitFileChange **changes,
-                unsigned *n_changes) {
+                unsigned *n_changes,
+                char** files) {
 
         int fd, r = 0;
         bool deleted;
@@ -349,7 +356,7 @@ static int remove_marked_symlinks(
                 }
 
                 /* 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);
+                q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes, files);
                 if (r == 0)
                         r = q;
         } while (deleted);
@@ -517,8 +524,11 @@ static int find_symlinks(
         assert(same_name_link);
 
         fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
-        if (fd < 0)
+        if (fd < 0) {
+                if (errno == ENOENT)
+                        return 0;
                 return -errno;
+        }
 
         /* This takes possession of fd and closes it */
         return find_symlinks_fd(name, fd, config_path, config_path, same_name_link);
@@ -531,7 +541,7 @@ static int find_symlinks_in_scope(
                 UnitFileState *state) {
 
         int r;
-        char *path;
+        char _cleanup_free_ *path = NULL;
         bool same_name_link_runtime = false, same_name_link = false;
 
         assert(scope >= 0);
@@ -546,8 +556,6 @@ static int find_symlinks_in_scope(
                         return r;
 
                 r = find_symlinks(name, path, &same_name_link_runtime);
-                free(path);
-
                 if (r < 0)
                         return r;
                 else if (r > 0) {
@@ -562,8 +570,6 @@ static int find_symlinks_in_scope(
                 return r;
 
         r = find_symlinks(name, path, &same_name_link);
-        free(path);
-
         if (r < 0)
                 return r;
         else if (r > 0) {
@@ -593,7 +599,8 @@ int unit_file_mask(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        char **i, *prefix;
+        char **i;
+        char _cleanup_free_ *prefix;
         int r;
 
         assert(scope >= 0);
@@ -604,9 +611,9 @@ int unit_file_mask(
                 return r;
 
         STRV_FOREACH(i, files) {
-                char *path;
+                char _cleanup_free_ *path = NULL;
 
-                if (!unit_name_is_valid_no_type(*i, true)) {
+                if (!unit_name_is_valid(*i, true)) {
                         if (r == 0)
                                 r = -EINVAL;
                         continue;
@@ -621,16 +628,13 @@ int unit_file_mask(
                 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);
+                        if (null_or_empty_path(path) > 0)
                                 continue;
-                        }
 
                         if (force) {
                                 unlink(path);
@@ -640,7 +644,6 @@ int unit_file_mask(
                                         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;
                                 }
                         }
@@ -651,12 +654,8 @@ int unit_file_mask(
                         if (r == 0)
                                 r = -errno;
                 }
-
-                free(path);
         }
 
-        free(prefix);
-
         return r;
 }
 
@@ -682,7 +681,7 @@ int unit_file_unmask(
         STRV_FOREACH(i, files) {
                 char *path;
 
-                if (!unit_name_is_valid_no_type(*i, true)) {
+                if (!unit_name_is_valid(*i, true)) {
                         if (r == 0)
                                 r = -EINVAL;
                         continue;
@@ -715,7 +714,7 @@ int unit_file_unmask(
 
 
 finish:
-        q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
+        q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
         if (r == 0)
                 r = q;
 
@@ -758,7 +757,7 @@ int unit_file_link(
                 fn = path_get_file_name(*i);
 
                 if (!path_is_absolute(*i) ||
-                    !unit_name_is_valid_no_type(fn, true)) {
+                    !unit_name_is_valid(fn, true)) {
                         if (r == 0)
                                 r = -EINVAL;
                         continue;
@@ -883,6 +882,7 @@ static void install_info_free(InstallInfo *i) {
         free(i->path);
         strv_free(i->aliases);
         strv_free(i->wanted_by);
+        strv_free(i->required_by);
         free(i);
 }
 
@@ -920,7 +920,7 @@ static int install_info_add(
         if (!name)
                 name = path_get_file_name(path);
 
-        if (!unit_name_is_valid_no_type(name, true))
+        if (!unit_name_is_valid(name, true))
                 return -EINVAL;
 
         if (hashmap_get(c->have_installed, name) ||
@@ -1021,9 +1021,10 @@ static int unit_file_load(
                 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                },
+                { "Install", "Alias",      config_parse_strv, 0, &info->aliases     },
+                { "Install", "WantedBy",   config_parse_strv, 0, &info->wanted_by   },
+                { "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
+                { "Install", "Also",       config_parse_also, 0, c                  },
                 { NULL, NULL, NULL, 0, NULL }
         };
 
@@ -1050,7 +1051,10 @@ static int unit_file_load(
         if (r < 0)
                 return r;
 
-        return strv_length(info->aliases) + strv_length(info->wanted_by);
+        return
+                strv_length(info->aliases) +
+                strv_length(info->wanted_by) +
+                strv_length(info->required_by);
 }
 
 static int unit_file_search(
@@ -1087,8 +1091,48 @@ static int unit_file_search(
 
                 if (r >= 0)
                         info->path = path;
-                else
+                else {
+                        if (r == -ENOENT && unit_name_is_instance(info->name)) {
+                                /* unit file doesn't exist, however instance enablement was request */
+                                /* we will check if it is possible to load template unit file */
+                                char *template = NULL,
+                                     *template_path = NULL,
+                                     *template_dir = NULL;
+
+                                template = unit_name_template(info->name);
+                                if (!template) {
+                                        free(path);
+                                        return -ENOMEM;
+                                }
+
+                                /* we will reuse path variable since we don't need it anymore */
+                                template_dir = path;
+                                *(strrchr(path, '/') + 1) = '\0';
+
+                                template_path = strjoin(template_dir, template, NULL);
+                                if (!template_path) {
+                                        free(path);
+                                        free(template);
+                                        return -ENOMEM;
+                                }
+
+                                /* let's try to load template unit */
+                                r = unit_file_load(c, info, template_path, allow_symlink);
+                                if (r >= 0) {
+                                        info->path = strdup(template_path);
+                                        if (!info->path) {
+                                                free(path);
+                                                free(template);
+                                                free(template_path);
+                                                return -ENOMEM;
+                                        }
+                                }
+
+                                free(template);
+                                free(template_path);
+                        }
                         free(path);
+                }
 
                 if (r != -ENOENT && r != -ELOOP)
                         return r;
@@ -1121,7 +1165,10 @@ static int unit_file_can_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);
+                r =
+                        strv_length(i->aliases) +
+                        strv_length(i->wanted_by) +
+                        strv_length(i->required_by);
 
         install_context_done(&c);
 
@@ -1141,7 +1188,7 @@ static int create_symlink(
         assert(old_path);
         assert(new_path);
 
-        mkdir_parents(new_path, 0755);
+        mkdir_parents_label(new_path, 0755);
 
         if (symlink(old_path, new_path) >= 0) {
                 add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
@@ -1223,7 +1270,7 @@ static int install_info_symlink_wants(
         STRV_FOREACH(s, i->wanted_by) {
                 char *path;
 
-                if (!unit_name_is_valid_no_type(*s, true)) {
+                if (!unit_name_is_valid(*s, true)) {
                         r = -EINVAL;
                         continue;
                 }
@@ -1241,6 +1288,40 @@ static int install_info_symlink_wants(
         return r;
 }
 
+static int install_info_symlink_requires(
+                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->required_by) {
+                char *path;
+
+                if (!unit_name_is_valid(*s, true)) {
+                        r = -EINVAL;
+                        continue;
+                }
+
+                if (asprintf(&path, "%s/%s.requires/%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,
@@ -1290,6 +1371,10 @@ static int install_info_apply(
         if (r == 0)
                 r = q;
 
+        q = install_info_symlink_requires(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;
@@ -1371,7 +1456,20 @@ static int install_context_mark_for_removal(
                 } else if (r >= 0)
                         r += q;
 
-                q = mark_symlink_for_removal(remove_symlinks_to, i->name);
+                if (unit_name_is_instance(i->name)) {
+                        char *unit_file = NULL;
+
+                        unit_file = path_get_file_name(i->path);
+
+                        if (unit_name_is_instance(unit_file))
+                                /* unit file named as instance exists, thus all symlinks pointing to it, will be removed */
+                                q = mark_symlink_for_removal(remove_symlinks_to, i->name);
+                        else
+                                /* does not exist, thus we will mark for removal symlinks to template unit file */
+                                q = mark_symlink_for_removal(remove_symlinks_to, unit_file);
+                } else
+                        q = mark_symlink_for_removal(remove_symlinks_to, i->name);
+
                 if (r >= 0 && q < 0)
                         r = q;
         }
@@ -1463,7 +1561,7 @@ int unit_file_disable(
 
         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);
+        q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
         if (r == 0)
                 r = q;
 
@@ -1515,7 +1613,7 @@ int unit_file_reenable(
                         goto finish;
         }
 
-        r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
+        r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
 
         /* Returns number of symlinks that where supposed to be installed. */
         q = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
@@ -1550,7 +1648,7 @@ UnitFileState unit_file_get_state(
         if (root_dir && scope != UNIT_FILE_SYSTEM)
                 return -EINVAL;
 
-        if (!unit_name_is_valid_no_type(name, true))
+        if (!unit_name_is_valid(name, true))
                 return -EINVAL;
 
         r = lookup_paths_init_from_scope(&paths, scope);
@@ -1635,16 +1733,18 @@ int unit_file_query_preset(UnitFileScope scope, const char *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",
+                                    "/etc/systemd/system-preset",
+                                    "/usr/local/lib/systemd/system-preset",
+                                    "/usr/lib/systemd/system-preset",
+#ifdef HAVE_SPLIT_USR
+                                    "/lib/systemd/system-preset",
+#endif
                                     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",
+                                    "/etc/systemd/user-preset",
+                                    "/usr/local/lib/systemd/user-preset",
+                                    "/usr/lib/systemd/user-preset",
                                     NULL);
         else
                 return 1;
@@ -1743,7 +1843,7 @@ int unit_file_preset(
 
         STRV_FOREACH(i, files) {
 
-                if (!unit_name_is_valid_no_type(*i, true)) {
+                if (!unit_name_is_valid(*i, true)) {
                         r = -EINVAL;
                         goto finish;
                 }
@@ -1763,7 +1863,7 @@ int unit_file_preset(
 
         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);
+        q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes, files);
         if (r == 0)
                 r = q;
 
@@ -1848,7 +1948,7 @@ int unit_file_get_list(
                         if (ignore_file(de->d_name))
                                 continue;
 
-                        if (!unit_name_is_valid_no_type(de->d_name, true))
+                        if (!unit_name_is_valid(de->d_name, true))
                                 continue;
 
                         if (hashmap_get(h, de->d_name))
@@ -1895,25 +1995,24 @@ int unit_file_get_list(
                                 free(f->path);
                                 free(f);
                                 goto finish;
-                        } else if (r > 0)
+                        } else if (r > 0) {
+                                f->state = UNIT_FILE_ENABLED;
                                 goto found;
+                        }
 
                         r = unit_file_can_install(&paths, root_dir, f->path, true);
-                        if (r < 0) {
+                        if (r == -EINVAL ||  /* Invalid setting? */
+                            r == -EBADMSG || /* Invalid format? */
+                            r == -ENOENT     /* Included file not found? */)
+                                f->state = UNIT_FILE_INVALID;
+                        else if (r < 0) {
                                 free(f->path);
                                 free(f);
                                 goto finish;
-                        } else if (r > 0) {
+                        } else if (r > 0)
                                 f->state = UNIT_FILE_DISABLED;
-                                goto found;
-                        } else {
+                        else
                                 f->state = UNIT_FILE_STATIC;
-                                goto found;
-                        }
-
-                        free(f->path);
-                        free(f);
-                        continue;
 
                 found:
                         r = hashmap_put(h, path_get_file_name(f->path), f);
@@ -1943,7 +2042,8 @@ static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
         [UNIT_FILE_MASKED] = "masked",
         [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
         [UNIT_FILE_STATIC] = "static",
-        [UNIT_FILE_DISABLED] = "disabled"
+        [UNIT_FILE_DISABLED] = "disabled",
+        [UNIT_FILE_INVALID] = "invalid",
 };
 
 DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);