+int open_serialization_fd(const char *ident) {
+ int fd = -1;
+
+ fd = memfd_create(ident, MFD_CLOEXEC);
+ if (fd < 0) {
+ const char *path;
+
+ path = getpid() == 1 ? "/run/systemd" : "/tmp";
+ fd = open_tmpfile_unlinkable(path, O_RDWR|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ log_debug("Serializing %s to %s.", ident, path);
+ } else
+ log_debug("Serializing %s to memfd.", ident);
+
+ return fd;
+}
+