Subj : Semaphores.
To   : j b l
From : mark lewis
Date : Fri Mar 10 2017 10:17 am


 On 2017 Mar 09 20:57:50, you wrote to me:

 ML>> x:\foo\semaphore\mail-in.sem... you need another process to watch for
 ML>> that semaphore... when it appears, start your mail tossing routine...
 ML>> remember

 jl> And how would I start this other process?

you could have a looping process that starts at bootup, looks for the 
mail-in.sem semaphore to start processing and sleeps for some period of time 
between looks for the semaphore... this one could start other scripts for the 
actual processing or it could do all the processing itself...

 or

you could have a single shot process that gets fired by cron every so often... 
when it starts it would look for its semaphores before doing any work which 
could be running other scripts for the actual processing or it could do all the 
processing itself...

 ML>> you need this on... if you are working on the linux side of the
 ML>> fence, you might be able to get fancy and just monitor the datetime
 ML>> of the semaphore

 jl> Yes. This is on the linux side.

let's get the basics of this working first before getting too fancy ;)

)\/(ark

Always Mount a Scratch Monkey
Do you manage your own servers? If you are not running an IDS/IPS yer doin' it 
wrong...
.... I'm in here for being crazy, not stupid.
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