[PATCH 2/3] tools: hv: Check return value of setsockopt call

[Tomas Hozza]

Check return value of setsockopt call and if it fails print error to the
system log and exit with non-zero value.

Signed-off-by: Tomas Hozza <thozza at redhat.com>
---
 tools/hv/hv_vss_daemon.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
index 64112e1..6c4d2f1 100644
--- a/tools/hv/hv_vss_daemon.c
+++ b/tools/hv/hv_vss_daemon.c
@@ -173,7 +173,11 @@ int main(void)
 		exit(EXIT_FAILURE);
 	}
 	nl_group = CN_VSS_IDX;
-	setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group));
+	if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) {
+		syslog(LOG_ERR, "setsockopt failed; error:%d %s", errno, strerror(errno));
+		close(fd);
+		exit(EXIT_FAILURE);
+	}
 	/*
 	 * Register ourselves with the kernel.
 	 */
-- 
1.8.1.4