Merge pull request #29454 from poettering/cg-pidref-get-path

[thirdparty/systemd.git] / src / basic / cgroup-util.c

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index fdbb749b4eedfd92e5cc14ab3668b944d7c0d23f..db803084aef037b0a8bf369f4429bf3c874647f4 100644 (file)
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -809,6 +809,28 @@ int cg_pid_get_path(const char *controller, pid_t pid, char **ret_path) {
         }
 }
 
+int cg_pidref_get_path(const char *controller, PidRef *pidref, char **ret_path) {
+        _cleanup_free_ char *path = NULL;
+        int r;
+
+        assert(ret_path);
+
+        if (!pidref_is_set(pidref))
+                return -ESRCH;
+
+        r = cg_pid_get_path(controller, pidref->pid, &path);
+        if (r < 0)
+                return r;
+
+        /* Before we return the path, make sure the procfs entry for this pid still matches the pidref */
+        r = pidref_verify(pidref);
+        if (r < 0)
+                return r;
+
+        *ret_path = TAKE_PTR(path);
+        return 0;
+}
+
 int cg_install_release_agent(const char *controller, const char *agent) {
         _cleanup_free_ char *fs = NULL, *contents = NULL;
         const char *sc;