[ale] Re: [ALE] file system trigger

[Greg Sabino Mullane]

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> What they want is for a job to sleep and then wakeup every so often.
> Is there to signal a job to run whenever a file appears in a directory.

Too bad they have such strange requirements (no cron). A cronjob would be 
the best thing: what happens when the process that is watching the 
directory gets killed? what happens when you reboot the box? There is 
nothing "builtin", you will have to write a script to monitor the 
directory yourself and do the sleeping. The good news is that such a 
script is fairly simple. The bad news is that without a cronjob to start 
the script up again as needed, you have no assurance that it will keep 
running if it crashes, or is killed, or the box is rebooted, etc.

Worse case scenario, you could make another script to monitor the 
first one, on the theory that it may survive what kills the first; or 
you could just sneak your watchdog script into an existing cronjob somehow.
Heck, you could even have the script issue periodic "at" commands... :)

Greg Sabino Mullane  greg at turnstep.com
PGP Key: 0x14964AC8 200202221228

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