cgroup: make sure cg_is_empty_recursive() returns 1 for non-existing cgroups

Previously, on the legacy hierarchy a non-existing cgroup was considered
identical to an empty one, but the unified hierarchy the check for a
non-existing one returned ENOENT.

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index 3ef96b238e6fe45e3e6bf112e8fe8fb50f14f87e..bf897c9b2dc4d78757111d832b615e41ff3a6ab4 100644 (file)
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -1002,6 +1002,8 @@ int cg_is_empty_recursive(const char *controller, const char *path) {
                         return r;
 
                 r = read_one_line_file(populated, &t);
+                if (r == -ENOENT)
+                        return 1;
                 if (r < 0)
                         return r;