varlink: apparently on old kernels SO_PEERPIDFD returns EINVAL

diff --git a/src/libsystemd/sd-varlink/varlink-util.c b/src/libsystemd/sd-varlink/varlink-util.c
index 971be643e82f62c4a840956d4c4d78a5056f01d4..b16d4bddb6c917f9bbd83de1f128ae3ad5e22726 100644 (file)
--- a/src/libsystemd/sd-varlink/varlink-util.c
+++ b/src/libsystemd/sd-varlink/varlink-util.c
@@ -16,7 +16,7 @@ int varlink_get_peer_pidref(sd_varlink *v, PidRef *ret) {
 
         int pidfd = sd_varlink_get_peer_pidfd(v);
         if (pidfd < 0) {
-                if (!ERRNO_IS_NEG_NOT_SUPPORTED(pidfd))
+                if (!ERRNO_IS_NEG_NOT_SUPPORTED(pidfd) && pidfd != -EINVAL)
                         return pidfd;
 
                 pid_t pid;