1 files changed, 15 insertions, 4 deletions
diff --git a/shared/systemd/src/basic/random-util.c b/shared/systemd/src/basic/random-util.c
index 9551e762..4f67d9af 100644
--- a/shared/systemd/src/basic/random-util.c
+++ b/shared/systemd/src/basic/random-util.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include "nm-sd-adapt-shared.h"
 
@@ -462,10 +462,21 @@ size_t random_pool_size(void) {
 }
 
 int random_write_entropy(int fd, const void *seed, size_t size, bool credit) {
+        _cleanup_close_ int opened_fd = -1;
         int r;
 
-        assert(fd >= 0);
-        assert(seed && size > 0);
+        assert(seed || size == 0);
+
+        if (size == 0)
+                return 0;
+
+        if (fd < 0) {
+                opened_fd = open("/dev/urandom", O_WRONLY|O_CLOEXEC|O_NOCTTY);
+                if (opened_fd < 0)
+                        return -errno;
+
+                fd = opened_fd;
+        }
 
         if (credit) {
                 _cleanup_free_ struct rand_pool_info *info = NULL;
@@ -491,6 +502,6 @@ int random_write_entropy(int fd, const void *seed, size_t size, bool credit) {
                         return r;
         }
 
-        return 0;
+        return 1;
 }
 #endif /* NM_IGNORED */