From: naddy <naddy@openbsd.org>
Date: Tue, 9 Feb 2021 21:42:04 +0000 (+0000)
Subject: rc: ensure that vfs.mounts.nfs check works without NFS
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=0049eb19c27a711bf1a21907c9638be7c5234993;p=openbsd

rc: ensure that vfs.mounts.nfs check works without NFS

If NFS isn't compiled into the kernel, sysctl -n vfs.mounts.nfs
will produce no numerical output.  Make sure that we always have
a valid arithmetic expression.

Reported by and ok patrick@
---

diff --git a/etc/rc b/etc/rc
index 94465add54f..cd1d02677a2 100644
--- a/etc/rc
+++ b/etc/rc
@@ -1,4 +1,4 @@
-#	$OpenBSD: rc,v 1.544 2020/11/29 20:14:06 deraadt Exp $
+#	$OpenBSD: rc,v 1.545 2021/02/09 21:42:04 naddy Exp $
 
 # System startup script run by init on autoboot or after single-user.
 # Output and error are redirected to console by init, and the console is the
@@ -424,7 +424,7 @@ if [[ $pf != NO ]]; then
 	pass in proto carp keep state (no-sync)
 	pass out proto carp !received-on any keep state (no-sync)"
 
-	if (($(sysctl -n vfs.mounts.nfs 2>/dev/null) > 0)); then
+	if (($(sysctl -n vfs.mounts.nfs 2>/dev/null)+0 > 0)); then
 		# Don't kill NFS.
 		RULES="set reassemble yes no-df
 		$RULES