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Re: [Nmh-workers] Locking In Scripts and nmh Locking

From: Paul Fox
Subject: Re: [Nmh-workers] Locking In Scripts and nmh Locking
Date: Thu, 26 Apr 2012 13:39:43 -0400

lyndon wrote:
 > On 2012-04-26, at 10:07 AM, Paul Fox wrote:
 > > but unless you use the locker from both the commandline and the
 > > cron-driven script, using it in either place won't help, will it?
 > Put the cron stuff in a file, then:
 > 2 4 * * * mhlock /usr/local/libexec/cronmhstuff
 > mhlock grabs the lock, runs whatever command was fed it, then releases the 
 > lock.  It would be the MH equivalent of FreeBSD's lockf(1).
 > As long as the mhlocked cron job is running, interactive commands would 
 > block 
 > waiting to acquire the lock.

but the example paul gave was:
 > i am sometimes surprised when my real time human commands that might
 > be "pick ...  -seq xyz; scan xyz" end up having their folder changed
 > out from under them.

if the cron job runs in between the pick and the scan, the mhlock you've
added won't help.

 paul fox, address@hidden (arlington, ma, where it's 57.7 degrees)

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