sd-login: fix return value of sd_pid_get_user_unit

E.g. "/user.slice/user-1000.slice/session-15.scope" would cause -ENXIO to be
returned.

diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c
index 030131e..cd844b3 100644 (file)
--- a/src/libsystemd/sd-login/sd-login.c
+++ b/src/libsystemd/sd-login/sd-login.c
@@ -74,11 +74,13 @@ _public_ int sd_pid_get_unit(pid_t pid, char **unit) {
 }
 
 _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) {
+        int r;
 
         assert_return(pid >= 0, -EINVAL);
         assert_return(unit, -EINVAL);
 
-        return cg_pid_get_user_unit(pid, unit);
+        r = cg_pid_get_user_unit(pid, unit);
+        return r == -ENXIO ? -ENODATA : r;
 }
 
 _public_ int sd_pid_get_machine_name(pid_t pid, char **name) {