From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 3 Dec 2016 17:32:21 +0000 (-0800)
Subject: hotplug: Check chown return value
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e999ab7e5ab5f8284f2987f7e1e0b9b7a63c4761;p=project%2Fprocd.git

hotplug: Check chown return value

Fixes:

plug/hotplug.c:152:10: error: ignoring return value of 'chown', declared with attribute warn_unused_result [-Werror=unused-result]
     chown(blobmsg_get_string(tb[0]), 0, g->gr_gid);

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---

diff --git a/plug/hotplug.c b/plug/hotplug.c
index 8595915..54a90cc 100644
--- a/plug/hotplug.c
+++ b/plug/hotplug.c
@@ -130,6 +130,7 @@ static void handle_makedev(struct blob_attr *msg, struct blob_attr *data)
 	char *minor = hotplug_msg_find_var(msg, "MINOR");
 	char *major = hotplug_msg_find_var(msg, "MAJOR");
 	char *subsystem = hotplug_msg_find_var(msg, "SUBSYSTEM");
+	int ret;
 
 	blobmsg_parse_array(mkdev_policy, 3, tb, blobmsg_data(data), blobmsg_data_len(data));
 	if (tb[0] && tb[1] && minor && major && subsystem) {
@@ -149,8 +150,9 @@ static void handle_makedev(struct blob_attr *msg, struct blob_attr *data)
 			struct group *g = getgrnam(blobmsg_get_string(tb[2]));
 
 			if (g)
-				chown(blobmsg_get_string(tb[0]), 0, g->gr_gid);
-			else
+				ret = chown(blobmsg_get_string(tb[0]), 0, g->gr_gid);
+
+			if (!g || ret < 0)
 				ERROR("cannot set group %s for %s\n",
 					blobmsg_get_string(tb[2]),
 					blobmsg_get_string(tb[0]));