systemctl: handle correctly template units for edit verb

Previously, if we provided getty@.service to systemctl edit it would
have failed when using the bus because it is an invalid unit name.
But it would have succeeded when searching in the filesystem.

Now, we check if we have a template, if we do we search in the
filesystem, if we don't have a templae and we can use the bus, we do.

Furthermore, if we provided getty@tty1.service it would not have worked
when searching the filesystem, but it would have worked with the bus.
So now, when using the filesystem we use the template name and not the
unit name, and the same when logging errors.

(Also did a refactoring to avoid a long function)

1 files changed, 87 insertions, 86 deletions

diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index a75e9dee17..8400bc8cd4 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -6026,9 +6026,65 @@ static int run_editor(char **paths) {
         return r;
 }
 
+static int unit_find_path(sd_bus *bus, const char *unit_name, const char *template, bool avoid_bus_cache, LookupPaths *lp, char **path) {
+        int r;
+
+        assert(unit_name);
+        assert(path);
+        assert(lp);
+
+        if (!avoid_bus_cache && !unit_name_is_template(unit_name)) {
+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+                _cleanup_free_ char *unit = NULL;
+                _cleanup_free_ char *tmp_path = NULL;
+
+                unit = unit_dbus_path_from_name(unit_name);
+                if (!unit)
+                        return log_oom();
+
+                if (need_daemon_reload(bus, unit_name) > 0) {
+                        log_warning("%s ignored: unit file changed on disk. Run 'systemctl%s daemon-reload'.",
+                                    unit_name, arg_scope == UNIT_FILE_SYSTEM ? "" : " --user");
+                        return 0;
+                }
+
+                r = sd_bus_get_property_string(
+                                bus,
+                                "org.freedesktop.systemd1",
+                                unit,
+                                "org.freedesktop.systemd1.Unit",
+                                "FragmentPath",
+                                &error,
+                                &tmp_path);
+                if (r < 0) {
+                        log_warning("Failed to get FragmentPath: %s", bus_error_message(&error, r));
+                        return 0;
+                }
+
+                if (isempty(tmp_path)) {
+                        log_warning("%s ignored: not found", template);
+                        return 0;
+                }
+
+                *path = tmp_path;
+                tmp_path = NULL;
+
+                return 1;
+        } else {
+                r = unit_file_find_path(lp, template, path);
+                if (r == 0)
+                        log_warning("%s ignored: not found", template);
+                return r;
+        }
+
+        return 0;
+}
+
 static int find_paths_to_edit(sd_bus *bus, char **names, char ***paths) {
         _cleanup_free_ char *user_home = NULL;
         _cleanup_free_ char *user_runtime = NULL;
+        _cleanup_lookup_paths_free_ LookupPaths lp = {};
+        bool avoid_bus_cache;
         char **name;
         int r;
 
@@ -6053,100 +6109,45 @@ static int find_paths_to_edit(sd_bus *bus, char **names, char ***paths) {
                 }
         }
 
-        if (!bus || avoid_bus()) {
-                _cleanup_lookup_paths_free_ LookupPaths lp = {};
-
-                /* If there is no bus, we try to find the units by testing each available directory
-                 * according to the scope.
-                 */
-                r = lookup_paths_init(&lp,
-                                arg_scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
-                                arg_scope == UNIT_FILE_USER,
-                                arg_root,
-                                NULL, NULL, NULL);
-                if (r < 0) {
-                        log_error_errno(r, "Failed get lookup paths: %m");
-                        return r;
-                }
-
-                STRV_FOREACH(name, names) {
-                        _cleanup_free_ char *path = NULL;
-                        char *new_path, *tmp_path;
-
-                        r = unit_file_find_path(&lp, *name, &path);
-                        if (r < 0)
-                                return r;
-                        if (r == 0) {
-                                log_warning("%s ignored: not found", *name);
-                                continue;
-                        }
+        r = lookup_paths_init(&lp,
+                              arg_scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
+                              arg_scope == UNIT_FILE_USER,
+                              arg_root,
+                              NULL, NULL, NULL);
+        if (r < 0) {
+                log_error_errno(r, "Failed get lookup paths: %m");
+                return r;
+        }
 
-                        if (arg_full)
-                                r = unit_file_create_copy(*name, path, user_home, user_runtime, &new_path, &tmp_path);
-                        else
-                                r = unit_file_create_drop_in(*name, user_home, user_runtime, &new_path, &tmp_path);
+        avoid_bus_cache = !bus || avoid_bus();
 
-                        if (r < 0)
-                                continue;
+        STRV_FOREACH(name, names) {
+                _cleanup_free_ char *path = NULL;
+                _cleanup_free_ char *template = NULL;
+                char *new_path, *tmp_path;
 
-                        r = strv_push(paths, new_path);
-                        if (r < 0)
-                                return log_oom();
+                template = unit_name_template(*name);
+                if (!template)
+                        return log_oom();
 
-                        r = strv_push(paths, tmp_path);
-                        if (r < 0)
-                                return log_oom();
+                r = unit_find_path(bus, *name, template, avoid_bus_cache, &lp, &path);
+                if (r < 0)
+                        return r;
+                else if (r == 0) {
+                        continue;
                 }
-        } else {
-                STRV_FOREACH(name, names) {
-                        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-                        _cleanup_free_ char *fragment_path = NULL;
-                        _cleanup_free_ char *unit = NULL;
-                        char *new_path, *tmp_path;
-
-                        unit = unit_dbus_path_from_name(*name);
-                        if (!unit)
-                                return log_oom();
-
-                        if (need_daemon_reload(bus, *name) > 0) {
-                                log_warning("%s ignored: unit file changed on disk. Run 'systemctl%s daemon-reload'.",
-                                        *name, arg_scope == UNIT_FILE_SYSTEM ? "" : " --user");
-                                continue;
-                        }
 
-                        r = sd_bus_get_property_string(
-                                        bus,
-                                        "org.freedesktop.systemd1",
-                                        unit,
-                                        "org.freedesktop.systemd1.Unit",
-                                        "FragmentPath",
-                                        &error,
-                                        &fragment_path);
-                        if (r < 0) {
-                                log_warning("Failed to get FragmentPath: %s", bus_error_message(&error, r));
-                                continue;
-                        }
-
-                        if (isempty(fragment_path)) {
-                                log_warning("%s ignored: not found", *name);
-                                continue;
-                        }
-
-                        if (arg_full)
-                                r = unit_file_create_copy(*name, fragment_path, user_home, user_runtime, &new_path, &tmp_path);
-                        else
-                                r = unit_file_create_drop_in(*name, user_home, user_runtime, &new_path, &tmp_path);
-                        if (r < 0)
-                                continue;
+                if (arg_full)
+                        r = unit_file_create_copy(template, path, user_home, user_runtime, &new_path, &tmp_path);
+                else
+                        r = unit_file_create_drop_in(template, user_home, user_runtime, &new_path, &tmp_path);
 
-                        r = strv_push(paths, new_path);
-                        if (r < 0)
-                                return log_oom();
+                if (r < 0)
+                        continue;
 
-                        r = strv_push(paths, tmp_path);
-                        if (r < 0)
-                                return log_oom();
-                }
+                r = strv_push_pair(paths, new_path, tmp_path);
+                if (r < 0)
+                        return log_oom();
         }
 
         return 0;