add an error message if more than one monitor

the change introduced by commit 31c53c2e1afc6c81ce4aad5ef4cb982cd2fea365
do not allow anymore to have more than one monitor.

The purpose of this patch is to add an error message
when such a condition is identified, eg:
===
lxc-monitor: bind : Address already in use
===

Signed-off-by: Michel Normand <normand@fr.ibm.com>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

diff --git a/src/lxc/monitor.c b/src/lxc/monitor.c
index 24e85e7adcb391f7ead61ea4ad0b4757c92906db..17d0a8e5e400b5e8b3764ab0222b70236c4a1bf2 100644 (file)
--- a/src/lxc/monitor.c
+++ b/src/lxc/monitor.c
@@ -142,10 +142,13 @@ int lxc_monitor_open(void)
        strcpy(offset, "lxc-monitor");
 
        fd = socket(PF_UNIX, SOCK_DGRAM, 0);
-       if (fd < 0)
+       if (fd < 0) {
+               ERROR("socket : %s", strerror(errno));
                return -1;
+       }
 
        if (bind(fd, (struct sockaddr *)&addr, sizeof(addr))) {
+               ERROR("bind : %s", strerror(errno));
                close(fd);
                return -1;
        }