Signed-off-by: Nathan Hintz <nlhi...@hotmail.com>
---
src/6relayd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/6relayd.c b/src/6relayd.c
index fcfecb7..32ead14 100644
--- a/src/6relayd.c
+++ b/src/6relayd.c
@@ -403,6 +403,9 @@ int relayd_get_interface_mtu(const char *ifname)
snprintf(buf, sizeof(buf), sysctl_pattern, ifname);
int fd = open(buf, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
ssize_t len = read(fd, buf, sizeof(buf) - 1);
close(fd);
--
1.8.3.1
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