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List:       busybox
Subject:    Re: Q: applet flock fails with 'invalid number $filename'
From:       Johannes Stezenbach <js () sig21 ! net>
Date:       2016-01-07 9:42:18
Message-ID: 20160107094218.GA7910 () sig21 ! net
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On Wed, Jan 06, 2016 at 11:37:33PM -0800, Isaac Dunham wrote:
> 
> If you want to run it to lock a critical section of a script, use
> exec FD>> FILE
> flock FD
> ...
> flock -u FD

FWIW, I think canonical use is:

   {
	flock 9
	...

   } 9>$lockfile


Johannes
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