From: Roy Marples <roy@marples.name>
Date: Wed, 19 Sep 2018 08:07:58 +0000 (+0100)
Subject: duid: test that we actually have a uuid on Linux
X-Git-Tag: v7.1.0~24
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d76ce7afb341e8cd1879852efc84291e409496d3;p=thirdparty%2Fdhcpcd.git

duid: test that we actually have a uuid on Linux
---

diff --git a/src/duid.c b/src/duid.c
index cc53f9bd..4faab9ab 100644
--- a/src/duid.c
+++ b/src/duid.c
@@ -88,7 +88,7 @@ duid_machineuuid(char *uuid, size_t uuid_len)
 	}
 	len = strlen(uuid) + 1;
 	fclose(fp);
-	r = 0;
+	r = len == 1 ? -1 : 0;
 #else
 	r = -1;
 	errno = ENOSYS;