init: check permissions on rc.d files

We try to unconditionally execute /etc/rc.d/* files, even if they're
not executable - an easy way of temproarily disabling a service. When
this happens, we get a permission denied error on boot.

This change only tries to run execulable startup scripts.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

SVN-Revision: 9607

package/base-files/files/etc/init.d/rcS

@@ -3,6 +3,6 @@
 
 {
 	for i in /etc/rc.d/$1*; do
-		$i $2 2>&1
+		[ -x $i ] && $i $2 2>&1
 	done 
 } | logger -s -p 6 -t '' &