D19847.id55955.diff
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D19847.id55955.diff
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	Index: head/sbin/mount/mount.c
	===================================================================
	--- head/sbin/mount/mount.c
	+++ head/sbin/mount/mount.c
	@@ -227,6 +227,7 @@
	struct pidfh *pfh;
	pid_t mountdpid;

	+ mountdpid = 0;
	pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
	if (pfh != NULL) {
	/* Mountd is not running. */
	@@ -237,6 +238,16 @@
	/* Cannot open pidfile for some reason. */
	return;
	}
	+
	+ /*
	+ * Refuse to send broadcast or group signals, this has
	+ * happened due to the bugs in pidfile(3).
	+ */
	+ if (mountdpid <= 0) {
	+ warnx("mountd pid %d, refusing to send SIGHUP", mountdpid);
	+ return;
	+ }
	+
	/* We have mountd(8) PID in mountdpid varible, let's signal it. */
	if (kill(mountdpid, SIGHUP) == -1)
	err(1, "signal mountd");