systemctl: don't show cgroup field for a unit if cgroup is empty

[elogind.git] / src / shared / cgroup-util.c

diff --git a/src/shared/cgroup-util.c b/src/shared/cgroup-util.c
index 6740d3b8856c2c1f0d616e1a8e0e124a3f2bac3b..18cbf0412ab823ec5d9045c1b0ef2f8238857e71 100644 (file)
--- a/src/shared/cgroup-util.c
+++ b/src/shared/cgroup-util.c
@@ -522,16 +522,16 @@ static int join_path(const char *controller, const char *path, const char *suffi
 
         if (controller) {
                 if (path && suffix)
-                        t = join("/sys/fs/cgroup/", controller, "/", path, "/", suffix, NULL);
+                        t = strjoin("/sys/fs/cgroup/", controller, "/", path, "/", suffix, NULL);
                 else if (path)
-                        t = join("/sys/fs/cgroup/", controller, "/", path, NULL);
+                        t = strjoin("/sys/fs/cgroup/", controller, "/", path, NULL);
                 else if (suffix)
-                        t = join("/sys/fs/cgroup/", controller, "/", suffix, NULL);
+                        t = strjoin("/sys/fs/cgroup/", controller, "/", suffix, NULL);
                 else
-                        t = join("/sys/fs/cgroup/", controller, NULL);
+                        t = strjoin("/sys/fs/cgroup/", controller, NULL);
         } else {
                 if (path && suffix)
-                        t = join(path, "/", suffix, NULL);
+                        t = strjoin(path, "/", suffix, NULL);
                 else if (path)
                         t = strdup(path);
         }
@@ -934,6 +934,20 @@ int cg_is_empty(const char *controller, const char *path, bool ignore_self) {
         return !found;
 }
 
+int cg_is_empty_by_spec(const char *spec, bool ignore_self) {
+        int r;
+        _cleanup_free_ char *controller = NULL, *path = NULL;
+
+        assert(spec);
+
+        r = cg_split_spec(spec, &controller, &path);
+        if (r < 0)
+                return r;
+
+        return cg_is_empty(controller, path, ignore_self);
+}
+
+
 int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_self) {
         int r;
         DIR *d = NULL;