summaryrefslogtreecommitdiff
path: root/src/core/load-dropin.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/core/load-dropin.c')
-rw-r--r--src/core/load-dropin.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/src/core/load-dropin.c b/src/core/load-dropin.c
new file mode 100644
index 0000000000..d869ee0c76
--- /dev/null
+++ b/src/core/load-dropin.c
@@ -0,0 +1,150 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 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 <dirent.h>
+#include <errno.h>
+
+#include "unit.h"
+#include "load-dropin.h"
+#include "log.h"
+#include "strv.h"
+#include "unit-name.h"
+
+static int iterate_dir(Unit *u, const char *path, UnitDependency dependency) {
+ DIR *d;
+ struct dirent *de;
+ int r;
+
+ assert(u);
+ assert(path);
+
+ d = opendir(path);
+ if (!d) {
+
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ while ((de = readdir(d))) {
+ char *f;
+
+ if (ignore_file(de->d_name))
+ continue;
+
+ f = join(path, "/", de->d_name, NULL);
+ if (!f) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true);
+ free(f);
+
+ if (r < 0)
+ log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r));
+ }
+
+ r = 0;
+
+finish:
+ closedir(d);
+ return r;
+}
+
+static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency) {
+ int r;
+ char *path;
+
+ assert(u);
+ assert(unit_path);
+ assert(name);
+ assert(suffix);
+
+ path = join(unit_path, "/", name, suffix, NULL);
+ if (!path)
+ return -ENOMEM;
+
+ if (u->manager->unit_path_cache &&
+ !set_get(u->manager->unit_path_cache, path))
+ r = 0;
+ else
+ r = iterate_dir(u, path, dependency);
+ free(path);
+
+ if (r < 0)
+ return r;
+
+ if (u->instance) {
+ char *template;
+ /* Also try the template dir */
+
+ template = unit_name_template(name);
+ if (!template)
+ return -ENOMEM;
+
+ path = join(unit_path, "/", template, suffix, NULL);
+ free(template);
+
+ if (!path)
+ return -ENOMEM;
+
+ if (u->manager->unit_path_cache &&
+ !set_get(u->manager->unit_path_cache, path))
+ r = 0;
+ else
+ r = iterate_dir(u, path, dependency);
+ free(path);
+
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int unit_load_dropin(Unit *u) {
+ Iterator i;
+ char *t;
+
+ assert(u);
+
+ /* Load dependencies from supplementary drop-in directories */
+
+ SET_FOREACH(t, u->names, i) {
+ char **p;
+
+ STRV_FOREACH(p, u->manager->lookup_paths.unit_path) {
+ int r;
+
+ r = process_dir(u, *p, t, ".wants", UNIT_WANTS);
+ if (r < 0)
+ return r;
+
+ r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ return 0;
+}