On Fri, Jan 03, 2003 at 12:22:14AM -0800, Bill Moseley wrote: > In a shell script does: > > MODPROBE=: > > do anything special besides set $MODPROBE to ":"?
No. > MODPROBE=: [...] > debug_mesg Looking for module $MODULE with modprobe=$MODPROBE > if $MODPROBE -n $MODULE >/dev/null 2>&1 && > ! $MODPROBE $MODULE >/dev/null 2>&1 ; then ':' is another name for 'true', which ignores all its arguments and returns true. It's often used as a substitute for a program that wasn't found on the build system or as a way to temporarily disable something. Since 'true && ! true' is false, that's why you're seeing this behaviour. It's possible that it's intentional; I don't know. If you have a problem, it's probably best to file a bug. -- Colin Watson [[EMAIL PROTECTED]] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
