tools: hv: Check return value of setsockopt call
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@redhat.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index 5a1f648..ae9aa1c 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -1457,7 +1457,13 @@
exit(EXIT_FAILURE);
}
nl_group = CN_KVP_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.
*/