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From dfd0017561730f675d65cc826815ce7c932892aa Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Wed, 11 Mar 2015 22:23:38 +0100
Subject: [PATCH] libudev: monitor - fix error path in send_device
Return -errno rather than -1 in case sendmsg() fails.
(cherry picked from commit a4445e88cece0444c66d70876b03065158dd4685)
---
src/libudev/libudev-monitor.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/src/libudev/libudev-monitor.c b/src/libudev/libudev-monitor.c
index 3f1fee7f7..d0486e3d1 100644
--- a/src/libudev/libudev-monitor.c
+++ b/src/libudev/libudev-monitor.c
@@ -749,12 +749,20 @@ int udev_monitor_send_device(struct udev_monitor *udev_monitor,
* If we send to a multicast group, we will get
* ECONNREFUSED, which is expected.
*/
- if (destination != NULL)
+ if (destination)
smsg.msg_name = &destination->snl;
else
smsg.msg_name = &udev_monitor->snl_destination;
smsg.msg_namelen = sizeof(struct sockaddr_nl);
count = sendmsg(udev_monitor->sock, &smsg, 0);
+ if (count < 0) {
+ if (!destination && errno == ECONNREFUSED) {
+ log_debug("passed unknown number of bytes to netlink monitor %p", udev_monitor);
+ return 0;
+ } else
+ return -errno;
+ }
+
log_debug("passed %zi bytes to netlink monitor %p", count, udev_monitor);
return count;
}