From: Tomas Hozza <thozza@redhat.com>
Date: Thu, 27 Jun 2013 11:52:48 +0000 (+0200)
Subject: tools: hv: Check return value of setsockopt call
X-Git-Tag: next-20130731~23^2~6
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d12e14692448e9f256028f53926a9bd3c3091e11;p=karo-tx-linux.git

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>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
index 5febe3542f79..826d499dc354 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.
 	 */