chiark / gitweb /
systemctl: add commands set-default and get-default
[elogind.git] / src / shared / install.c
index 24905e1af637b3fef03b5f68b8df25e49e9f22f8..954dcb1e714357eeb3bd1fccbf3dc69a7f277296 100644 (file)
 #include "install.h"
 #include "conf-parser.h"
 #include "conf-files.h"
-
-typedef struct {
-        char *name;
-        char *path;
-
-        char **aliases;
-        char **wanted_by;
-        char **required_by;
-} InstallInfo;
+#include "specifier.h"
+#include "install-printf.h"
 
 typedef struct {
         Hashmap *will_install;
@@ -185,11 +178,9 @@ static int mark_symlink_for_removal(
 
         path_kill_slashes(n);
 
-        r = set_put(*remove_symlinks_to, n);
-        if (r < 0) {
-                free(n);
+        r = set_consume(*remove_symlinks_to, n);
+        if (r < 0)
                 return r == -EEXIST ? 0 : r;
-        }
 
         return 0;
 }
@@ -205,7 +196,7 @@ static int remove_marked_symlinks_fd(
                 char** files) {
 
         int r = 0;
-        DIR _cleanup_closedir_ *d = NULL;
+        _cleanup_closedir_ DIR *d = NULL;
 
         assert(remove_symlinks_to);
         assert(fd >= 0);
@@ -242,7 +233,7 @@ static int remove_marked_symlinks_fd(
 
                 if (de->d_type == DT_DIR) {
                         int nfd, q;
-                        char _cleanup_free_ *p = NULL;
+                        _cleanup_free_ char *p = NULL;
 
                         nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
                         if (nfd < 0) {
@@ -267,7 +258,7 @@ static int remove_marked_symlinks_fd(
                                 r = q;
 
                 } else if (de->d_type == DT_LNK) {
-                        char _cleanup_free_ *p = NULL, *dest = NULL;
+                        _cleanup_free_ char *p = NULL, *dest = NULL;
                         int q;
                         bool found;
 
@@ -369,7 +360,7 @@ static int find_symlinks_fd(
                 bool *same_name_link) {
 
         int r = 0;
-        DIR _cleanup_closedir_ *d = NULL;
+        _cleanup_closedir_ DIR *d = NULL;
 
         assert(name);
         assert(fd >= 0);
@@ -402,7 +393,7 @@ static int find_symlinks_fd(
 
                 if (de->d_type == DT_DIR) {
                         int nfd, q;
-                        char _cleanup_free_ *p = NULL;
+                        _cleanup_free_ char *p = NULL;
 
                         nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
                         if (nfd < 0) {
@@ -430,7 +421,7 @@ static int find_symlinks_fd(
                                 r = q;
 
                 } else if (de->d_type == DT_LNK) {
-                        char _cleanup_free_ *p = NULL, *dest = NULL;
+                        _cleanup_free_ char *p = NULL, *dest = NULL;
                         bool found_path, found_dest, b = false;
                         int q;
 
@@ -465,7 +456,7 @@ static int find_symlinks_fd(
                                 found_dest = streq(path_get_file_name(dest), name);
 
                         if (found_path && found_dest) {
-                                char _cleanup_free_ *t = NULL;
+                                _cleanup_free_ char *t = NULL;
 
                                 /* Filter out same name links in the main
                                  * config path */
@@ -515,7 +506,7 @@ static int find_symlinks_in_scope(
                 UnitFileState *state) {
 
         int r;
-        char _cleanup_free_ *path = NULL;
+        _cleanup_free_ char *path = NULL;
         bool same_name_link_runtime = false, same_name_link = false;
 
         assert(scope >= 0);
@@ -574,7 +565,7 @@ int unit_file_mask(
                 unsigned *n_changes) {
 
         char **i;
-        char _cleanup_free_ *prefix;
+        _cleanup_free_ char *prefix;
         int r;
 
         assert(scope >= 0);
@@ -585,7 +576,7 @@ int unit_file_mask(
                 return r;
 
         STRV_FOREACH(i, files) {
-                char _cleanup_free_ *path = NULL;
+                _cleanup_free_ char *path = NULL;
 
                 if (!unit_name_is_valid(*i, true)) {
                         if (r == 0)
@@ -707,9 +698,9 @@ int unit_file_link(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
         char **i;
-        char _cleanup_free_ *config_path = NULL;
+        _cleanup_free_ char *config_path = NULL;
         int r, q;
 
         assert(scope >= 0);
@@ -724,7 +715,7 @@ int unit_file_link(
                 return r;
 
         STRV_FOREACH(i, files) {
-                char _cleanup_free_ *path = NULL;
+                _cleanup_free_ char *path = NULL;
                 char *fn;
                 struct stat st;
 
@@ -765,7 +756,7 @@ int unit_file_link(
                 }
 
                 if (errno == EEXIST) {
-                        char _cleanup_free_ *dest = NULL;
+                        _cleanup_free_ char *dest = NULL;
 
                         q = readlink_and_make_absolute(path, &dest);
 
@@ -928,15 +919,15 @@ static int install_info_add_auto(
                 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) {
+static int config_parse_also(const char *unit,
+                             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;
@@ -948,7 +939,7 @@ static int config_parse_also(
         assert(rvalue);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char _cleanup_free_ *n;
+                _cleanup_free_ char *n;
                 int r;
 
                 n = strndup(w, l);
@@ -963,6 +954,33 @@ static int config_parse_also(
         return 0;
 }
 
+static int config_parse_user(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
+
+        InstallInfo *i = data;
+        char* printed;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        printed = install_full_printf(i, rvalue);
+        if (!printed)
+                return -ENOMEM;
+
+        free(i->user);
+        i->user = printed;
+
+        return 0;
+}
+
 static int unit_file_load(
                 InstallContext *c,
                 InstallInfo *info,
@@ -974,11 +992,12 @@ static int unit_file_load(
                 { "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                  },
+                { "Exec",    "User",       config_parse_user, 0, info               },
                 { NULL, NULL, NULL, 0, NULL }
         };
 
         int fd;
-        FILE _cleanup_fclose_ *f = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
         int r;
 
         assert(c);
@@ -995,7 +1014,8 @@ static int unit_file_load(
                 return -ENOMEM;
         }
 
-        r = config_parse(path, f, NULL, config_item_table_lookup, (void*) items, true, info);
+        r = config_parse(NULL, path, f, NULL,
+                         config_item_table_lookup, (void*) items, true, true, info);
         if (r < 0)
                 return r;
 
@@ -1095,7 +1115,7 @@ static int unit_file_can_install(
                 const char *name,
                 bool allow_symlink) {
 
-        InstallContext _cleanup_install_context_done_ c = {NULL};
+        _cleanup_install_context_done_ InstallContext c = {};
         InstallInfo *i;
         int r;
 
@@ -1126,7 +1146,7 @@ static int create_symlink(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        char _cleanup_free_ *dest = NULL;
+        _cleanup_free_ char *dest = NULL;
         int r;
 
         assert(old_path);
@@ -1177,16 +1197,17 @@ static int install_info_symlink_alias(
         assert(config_path);
 
         STRV_FOREACH(s, i->aliases) {
-                char *alias_path;
+                _cleanup_free_ char *alias_path = NULL, *dst = NULL;
 
-                alias_path = path_make_absolute(*s, config_path);
+                dst = install_full_printf(i, *s);
+                if (!dst)
+                        return -ENOMEM;
 
+                alias_path = path_make_absolute(dst, 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;
         }
@@ -1208,18 +1229,21 @@ static int install_info_symlink_wants(
         assert(config_path);
 
         STRV_FOREACH(s, i->wanted_by) {
-                char *path;
+                _cleanup_free_ char *path = NULL, *dst = NULL;
 
-                if (!unit_name_is_valid(*s, true)) {
+                dst = install_full_printf(i, *s);
+                if (!dst)
+                        return -ENOMEM;
+
+                if (!unit_name_is_valid(dst, true)) {
                         r = -EINVAL;
                         continue;
                 }
 
-                if (asprintf(&path, "%s/%s.wants/%s", config_path, *s, i->name) < 0)
+                if (asprintf(&path, "%s/%s.wants/%s", config_path, dst, i->name) < 0)
                         return -ENOMEM;
 
                 q = create_symlink(i->path, path, force, changes, n_changes);
-                free(path);
 
                 if (r == 0)
                         r = q;
@@ -1242,18 +1266,21 @@ static int install_info_symlink_requires(
         assert(config_path);
 
         STRV_FOREACH(s, i->required_by) {
-                char *path;
+                _cleanup_free_ char *path = NULL, *dst = NULL;
+
+                dst = install_full_printf(i, *s);
+                if (!dst)
+                        return -ENOMEM;
 
-                if (!unit_name_is_valid(*s, true)) {
+                if (!unit_name_is_valid(dst, true)) {
                         r = -EINVAL;
                         continue;
                 }
 
-                if (asprintf(&path, "%s/%s.requires/%s", config_path, *s, i->name) < 0)
+                if (asprintf(&path, "%s/%s.requires/%s", config_path, dst, i->name) < 0)
                         return -ENOMEM;
 
                 q = create_symlink(i->path, path, force, changes, n_changes);
-                free(path);
 
                 if (r == 0)
                         r = q;
@@ -1271,7 +1298,7 @@ static int install_info_symlink_link(
                 unsigned *n_changes) {
 
         int r;
-        char _cleanup_free_ *path = NULL;
+        _cleanup_free_ char *path = NULL;
 
         assert(i);
         assert(paths);
@@ -1424,10 +1451,10 @@ int unit_file_enable(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
-        InstallContext _cleanup_install_context_done_ c = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
+        _cleanup_install_context_done_ InstallContext c = {};
         char **i;
-        char _cleanup_free_ *config_path = NULL;
+        _cleanup_free_ char *config_path = NULL;
         int r;
 
         assert(scope >= 0);
@@ -1463,11 +1490,11 @@ int unit_file_disable(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
-        InstallContext _cleanup_install_context_done_ c = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
+        _cleanup_install_context_done_ InstallContext c = {};
         char **i;
-        char _cleanup_free_ *config_path = NULL;
-        Set _cleanup_set_free_free_ *remove_symlinks_to = NULL;
+        _cleanup_free_ char *config_path = NULL;
+        _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
         int r, q;
 
         assert(scope >= 0);
@@ -1505,11 +1532,11 @@ int unit_file_reenable(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
-        InstallContext _cleanup_install_context_done_ c = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
+        _cleanup_install_context_done_ InstallContext c = {};
         char **i;
-        char _cleanup_free_ *config_path = NULL;
-        Set _cleanup_set_free_free_ *remove_symlinks_to = NULL;
+        _cleanup_free_ char *config_path = NULL;
+        _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
         int r, q;
 
         assert(scope >= 0);
@@ -1543,15 +1570,101 @@ int unit_file_reenable(
         return r;
 }
 
+int unit_file_set_default(
+                UnitFileScope scope,
+                const char *root_dir,
+                char *file,
+                UnitFileChange **changes,
+                unsigned *n_changes) {
+
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
+        _cleanup_install_context_done_ InstallContext c = {};
+        _cleanup_free_ char *config_path = NULL;
+        char *path;
+        int r;
+        InstallInfo *i = NULL;
+
+        assert(scope >= 0);
+        assert(scope < _UNIT_FILE_SCOPE_MAX);
+
+        if (unit_name_to_type(file) != UNIT_TARGET)
+                return -EINVAL;
+
+        r = lookup_paths_init_from_scope(&paths, scope);
+        if (r < 0)
+                return r;
+
+        r = get_config_path(scope, false, root_dir, &config_path);
+        if (r < 0)
+                return r;
+
+        r = install_info_add_auto(&c, file);
+        if (r < 0)
+                return r;
+
+        i = (InstallInfo*)hashmap_first(c.will_install);
+
+        r = unit_file_search(&c, i, &paths, root_dir, false);
+        if (r < 0)
+                return r;
+
+        path = strappenda(config_path, "/default.target");
+        r = create_symlink(i->path, path, true, changes, n_changes);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int unit_file_get_default(
+                UnitFileScope scope,
+                const char *root_dir,
+                char **name) {
+
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
+        char **p;
+        int r;
+
+        r = lookup_paths_init_from_scope(&paths, scope);
+        if (r < 0)
+                return r;
+
+        STRV_FOREACH(p, paths.unit_path) {
+                _cleanup_free_ char *path = NULL, *tmp = NULL;
+
+                if (isempty(root_dir))
+                        path = strappend(*p, "/default.target");
+                else
+                        path = strjoin(root_dir, "/", *p, "/default.target", NULL);
+
+                if (!path)
+                        return -ENOMEM;
+
+                r = readlink_malloc(path, &tmp);
+                if (r == -ENOENT)
+                        continue;
+                else if (r < 0)
+                        return r;
+
+                *name = strdup(path_get_file_name(tmp));
+                if (!*name)
+                        return -ENOMEM;
+
+                return 0;
+        }
+
+        return -ENOENT;
+}
+
 UnitFileState unit_file_get_state(
                 UnitFileScope scope,
                 const char *root_dir,
                 const char *name) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
         UnitFileState state = _UNIT_FILE_STATE_INVALID;
         char **i;
-        char _cleanup_free_ *path = NULL;
+        _cleanup_free_ char *path = NULL;
         int r;
 
         assert(scope >= 0);
@@ -1582,24 +1695,29 @@ UnitFileState unit_file_get_state(
                 if (!path)
                         return -ENOMEM;
 
+                /*
+                 * Search for a unit file in our default paths, to
+                 * be sure, that there are no broken symlinks.
+                 */
                 if (lstat(path, &st) < 0) {
                         r = -errno;
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
+                        if (errno != ENOENT)
+                                return r;
 
-                if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
-                        return -ENOENT;
+                        if (!unit_name_is_instance(name))
+                                continue;
+                } else {
+                        if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
+                                return -ENOENT;
 
-                r = null_or_empty_path(path);
-                if (r < 0 && r != -ENOENT)
-                        return r;
-                else if (r > 0) {
-                        state = path_startswith(*i, "/run") ?
-                                UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
-                        return state;
+                        r = null_or_empty_path(path);
+                        if (r < 0 && r != -ENOENT)
+                                return r;
+                        else if (r > 0) {
+                                state = path_startswith(*i, "/run") ?
+                                        UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
+                                return state;
+                        }
                 }
 
                 r = find_symlinks_in_scope(scope, root_dir, name, &state);
@@ -1609,7 +1727,7 @@ UnitFileState unit_file_get_state(
                         return state;
 
                 r = unit_file_can_install(&paths, root_dir, path, true);
-                if (r < 0 && errno != -ENOENT)
+                if (r < 0 && errno != ENOENT)
                         return r;
                 else if (r > 0)
                         return UNIT_FILE_DISABLED;
@@ -1621,7 +1739,7 @@ UnitFileState unit_file_get_state(
 }
 
 int unit_file_query_preset(UnitFileScope scope, const char *name) {
-        char _cleanup_strv_free_ **files = NULL;
+        _cleanup_strv_free_ char **files = NULL;
         char **i;
         int r;
 
@@ -1630,7 +1748,7 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) {
         assert(name);
 
         if (scope == UNIT_FILE_SYSTEM)
-                r = conf_files_list(&files, ".preset",
+                r = conf_files_list(&files, ".preset", NULL,
                                     "/etc/systemd/system-preset",
                                     "/usr/local/lib/systemd/system-preset",
                                     "/usr/lib/systemd/system-preset",
@@ -1639,7 +1757,7 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) {
 #endif
                                     NULL);
         else if (scope == UNIT_FILE_GLOBAL)
-                r = conf_files_list(&files, ".preset",
+                r = conf_files_list(&files, ".preset", NULL,
                                     "/etc/systemd/user-preset",
                                     "/usr/local/lib/systemd/user-preset",
                                     "/usr/lib/systemd/user-preset",
@@ -1651,7 +1769,7 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) {
                 return r;
 
         STRV_FOREACH(i, files) {
-                FILE _cleanup_fclose_ *f;
+                _cleanup_fclose_ FILE *f;
 
                 f = fopen(*i, "re");
                 if (!f) {
@@ -1671,7 +1789,7 @@ int unit_file_query_preset(UnitFileScope scope, const char *name) {
                         if (!*l)
                                 continue;
 
-                        if (strchr(COMMENTS, *l))
+                        if (strchr(COMMENTS "\n", *l))
                                 continue;
 
                         if (first_word(l, "enable")) {
@@ -1706,11 +1824,11 @@ int unit_file_preset(
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
-        InstallContext _cleanup_install_context_done_ plus = {NULL}, minus = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
+        _cleanup_install_context_done_ InstallContext plus = {}, minus = {};
         char **i;
-        char _cleanup_free_ *config_path = NULL;
-        Set _cleanup_set_free_free_ *remove_symlinks_to = NULL;
+        _cleanup_free_ char *config_path = NULL;
+        _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
         int r, q;
 
         assert(scope >= 0);
@@ -1772,10 +1890,10 @@ int unit_file_get_list(
                 const char *root_dir,
                 Hashmap *h) {
 
-        LookupPaths _cleanup_lookup_paths_free_ paths = {NULL};
+        _cleanup_lookup_paths_free_ LookupPaths paths = {};
         char **i;
-        char _cleanup_free_ *buf = NULL;
-        DIR _cleanup_closedir_ *d = NULL;
+        _cleanup_free_ char *buf = NULL;
+        _cleanup_closedir_ DIR *d = NULL;
         int r;
 
         assert(scope >= 0);