ctl: create control socket with close-on-exec semantic

Otherwise, when we spawn lldpcli, it inherits the file descriptor and
doesn't detect if the daemon dies just after because it is listening
itself to the Unix socket.

diff --git a/src/ctl.c b/src/ctl.c
index fd6d50d5772c3275ede081c0f2321cf6e3da2006..5799f1d6325d62fedb0a5066fb859f7a6b441025 100644 (file)
--- a/src/ctl.c
+++ b/src/ctl.c
@@ -46,6 +46,10 @@ ctl_create(const char *name)
 
        if ((s = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
                return -1;
+       if (fcntl(s, F_SETFD, FD_CLOEXEC) == -1) {
+               close(s);
+               return -1;
+       }
        su.sun_family = AF_UNIX;
        strlcpy(su.sun_path, name, sizeof(su.sun_path));
        if (bind(s, (struct sockaddr *)&su, sizeof(struct sockaddr_un)) == -1) {