chiark / gitweb /
core: convert PID 1 to libsystemd-bus
[elogind.git] / src / shared / install.c
index d2dd27680309b424f3d89588597f8d8c6beab9c4..16504eef0fe7aee6c4306de9a8dbc7e5c7c80ef8 100644 (file)
 #include "conf-files.h"
 #include "specifier.h"
 #include "install-printf.h"
+#include "special.h"
 
 typedef struct {
         Hashmap *will_install;
         Hashmap *have_installed;
 } InstallContext;
 
-#define _cleanup_lookup_paths_free_ \
-        __attribute__((cleanup(lookup_paths_free)))
-#define _cleanup_install_context_done_ \
-        __attribute__((cleanup(install_context_done)))
+#define _cleanup_install_context_done_ _cleanup_(install_context_done)
 
 static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) {
         assert(paths);
@@ -506,7 +504,7 @@ static int find_symlinks_in_scope(
                 UnitFileState *state) {
 
         int r;
-        _cleanup_free_ char *path = NULL;
+        _cleanup_free_ char *path2 = NULL;
         bool same_name_link_runtime = false, same_name_link = false;
 
         assert(scope >= 0);
@@ -514,6 +512,7 @@ static int find_symlinks_in_scope(
         assert(name);
 
         if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) {
+                _cleanup_free_ char *path = NULL;
 
                 /* First look in runtime config path */
                 r = get_config_path(scope, true, root_dir, &path);
@@ -530,11 +529,11 @@ static int find_symlinks_in_scope(
         }
 
         /* Then look in the normal config path */
-        r = get_config_path(scope, false, root_dir, &path);
+        r = get_config_path(scope, false, root_dir, &path2);
         if (r < 0)
                 return r;
 
-        r = find_symlinks(name, path, &same_name_link);
+        r = find_symlinks(name, path2, &same_name_link);
         if (r < 0)
                 return r;
         else if (r > 0) {
@@ -966,14 +965,15 @@ static int config_parse_user(const char *unit,
 
         InstallInfo *i = data;
         char* printed;
+        int r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
 
-        printed = install_full_printf(i, rvalue);
-        if (!printed)
-                return -ENOMEM;
+        r = install_full_printf(i, rvalue, &printed);
+        if (r < 0)
+                return r;
 
         free(i->user);
         i->user = printed;
@@ -1061,8 +1061,8 @@ static int unit_file_search(
                         info->path = path;
                 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 */
+                                /* Unit file doesn't exist, however instance enablement was requested.
+                                 * We will check if it is possible to load template unit file. */
                                 char *template = NULL,
                                      *template_path = NULL,
                                      *template_dir = NULL;
@@ -1073,7 +1073,7 @@ static int unit_file_search(
                                         return -ENOMEM;
                                 }
 
-                                /* we will reuse path variable since we don't need it anymore */
+                                /* We will reuse path variable since we don't need it anymore. */
                                 template_dir = path;
                                 *(strrchr(path, '/') + 1) = '\0';
 
@@ -1084,7 +1084,7 @@ static int unit_file_search(
                                         return -ENOMEM;
                                 }
 
-                                /* let's try to load template unit */
+                                /* 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);
@@ -1199,9 +1199,9 @@ static int install_info_symlink_alias(
         STRV_FOREACH(s, i->aliases) {
                 _cleanup_free_ char *alias_path = NULL, *dst = NULL;
 
-                dst = install_full_printf(i, *s);
-                if (!dst)
-                        return -ENOMEM;
+                q = install_full_printf(i, *s, &dst);
+                if (q < 0)
+                        return q;
 
                 alias_path = path_make_absolute(dst, config_path);
                 if (!alias_path)
@@ -1231,9 +1231,9 @@ static int install_info_symlink_wants(
         STRV_FOREACH(s, i->wanted_by) {
                 _cleanup_free_ char *path = NULL, *dst = NULL;
 
-                dst = install_full_printf(i, *s);
-                if (!dst)
-                        return -ENOMEM;
+                q = install_full_printf(i, *s, &dst);
+                if (q < 0)
+                        return q;
 
                 if (!unit_name_is_valid(dst, true)) {
                         r = -EINVAL;
@@ -1268,9 +1268,9 @@ static int install_info_symlink_requires(
         STRV_FOREACH(s, i->required_by) {
                 _cleanup_free_ char *path = NULL, *dst = NULL;
 
-                dst = install_full_printf(i, *s);
-                if (!dst)
-                        return -ENOMEM;
+                q = install_full_printf(i, *s, &dst);
+                if (q < 0)
+                        return q;
 
                 if (!unit_name_is_valid(dst, true)) {
                         r = -EINVAL;
@@ -1424,16 +1424,30 @@ static int install_context_mark_for_removal(
                         r += q;
 
                 if (unit_name_is_instance(i->name)) {
-                        char *unit_file = NULL;
+                        char *unit_file;
+
+                        if (i->path) {
+                                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 {
+                                /* If i->path is not set, it means that we didn't actually find
+                                 * the unit file. But we can still remove symlinks to the
+                                 * nonexistent template. */
+                                unit_file = unit_name_template(i->name);
+                                if (!unit_file)
+                                        return log_oom();
 
-                        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);
+                                free(unit_file);
+                        }
                 } else
                         q = mark_symlink_for_removal(remove_symlinks_to, i->name);
 
@@ -1533,49 +1547,22 @@ int unit_file_reenable(
                 bool force,
                 UnitFileChange **changes,
                 unsigned *n_changes) {
+        int r;
 
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_install_context_done_ InstallContext c = {};
-        char **i;
-        _cleanup_free_ char *config_path = NULL;
-        _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
-        int r, q;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-
-        r = lookup_paths_init_from_scope(&paths, scope);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
+        r = unit_file_disable(scope, runtime, root_dir, files,
+                              changes, n_changes);
         if (r < 0)
                 return r;
 
-        STRV_FOREACH(i, files) {
-                r = mark_symlink_for_removal(&remove_symlinks_to, *i);
-                if (r < 0)
-                        return r;
-
-                r = install_info_add_auto(&c, *i);
-                if (r < 0)
-                        return r;
-        }
-
-        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);
-        if (r == 0)
-                r = q;
-
-        return r;
+        return unit_file_enable(scope, runtime, root_dir, files, force,
+                                changes, n_changes);
 }
 
 int unit_file_set_default(
                 UnitFileScope scope,
                 const char *root_dir,
-                char *file,
+                const char *file,
+                bool force,
                 UnitFileChange **changes,
                 unsigned *n_changes) {
 
@@ -1588,6 +1575,7 @@ int unit_file_set_default(
 
         assert(scope >= 0);
         assert(scope < _UNIT_FILE_SCOPE_MAX);
+        assert(file);
 
         if (unit_name_to_type(file) != UNIT_TARGET)
                 return -EINVAL;
@@ -1604,14 +1592,15 @@ int unit_file_set_default(
         if (r < 0)
                 return r;
 
-        i = (InstallInfo*)hashmap_first(c.will_install);
+        assert_se(i = 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);
+        path = strappenda(config_path, "/" SPECIAL_DEFAULT_TARGET);
+
+        r = create_symlink(i->path, path, force, changes, n_changes);
         if (r < 0)
                 return r;
 
@@ -1627,17 +1616,22 @@ int unit_file_get_default(
         char **p;
         int r;
 
+        assert(scope >= 0);
+        assert(scope < _UNIT_FILE_SCOPE_MAX);
+        assert(name);
+
         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;
+                char *n;
 
                 if (isempty(root_dir))
-                        path = strappend(*p, "/default.target");
+                        path = strappend(*p, "/" SPECIAL_DEFAULT_TARGET);
                 else
-                        path = strjoin(root_dir, "/", *p, "/default.target", NULL);
+                        path = strjoin(root_dir, "/", *p, "/" SPECIAL_DEFAULT_TARGET, NULL);
 
                 if (!path)
                         return -ENOMEM;
@@ -1645,13 +1639,18 @@ int unit_file_get_default(
                 r = readlink_malloc(path, &tmp);
                 if (r == -ENOENT)
                         continue;
+                else if (r == -EINVAL)
+                        /* not a symlink */
+                        n = strdup(SPECIAL_DEFAULT_TARGET);
                 else if (r < 0)
                         return r;
+                else
+                        n = strdup(path_get_file_name(tmp));
 
-                *name = strdup(path_get_file_name(tmp));
-                if (!*name)
+                if (!n)
                         return -ENOMEM;
 
+                *name = n;
                 return 0;
         }
 
@@ -1886,6 +1885,7 @@ static void unitfilelist_free(UnitFileList **f) {
         free((*f)->path);
         free(*f);
 }
+#define _cleanup_unitfilelist_free_ _cleanup_(unitfilelist_free)
 
 int unit_file_get_list(
                 UnitFileScope scope,
@@ -1937,8 +1937,7 @@ int unit_file_get_list(
                 for (;;) {
                         struct dirent *de;
                         union dirent_storage buffer;
-                        UnitFileList __attribute__((cleanup(unitfilelist_free)))
-                                *f = NULL;
+                        _cleanup_unitfilelist_free_ UnitFileList *f = NULL;
 
                         r = readdir_r(d, &buffer.de, &de);
                         if (r != 0)