LinuxSA Mailing list archives

  From: <michaeld@senet.com.au>
  To  : Horst Poehlmann <Horst.Poehlmann@pobox.com>
        <linuxsa@linuxsa.org.au>
  Date: Fri, 29 Jun 2001 05:46:09 GMT

Re: ps and processes

Horst wrote:
> I run a program that monitors if a process is still running. It works
> for a while and then tells me that the process has died even though it's
> still running. I know why, but I would like to solve it. Basically what
> happens is that I grep for a line to match a certain pattern. eg.
> 
> root     29437  0.0  0.3  4356 3224 ?        S    Jun24   0:00 perl 
/usr/bin/swatch -c
/root/.swatchrc some other params here...
> root     29438  0.0  0.3  4344 3212 ?        S    Jun24   0:00 perl 
/usr/bin/swatch -c
/root/.swatchrc.page some other params here...
> 
> I'm basically grepping for .swatchrc and .swatchrc.page (I'm monitoring
> them seperately).
> 
> After a few days however, those processes get swapped out to memory and
> I get the following:
> 
> root     29437  0.0  0.0  4356    0 ?        SW   Jun24   0:00 [perl]
> root     29438  0.0  0.0  4344    0 ?        SW   Jun24   0:00 [perl]

[snip]

Grab the PID when you can see the parms (ie when you first run) and monitor the 
existance or not of that PID.  You could even check the PPID as well to ensure 
that it didn't die and another process started up in it's place (unlikely 
anyhow).

Cheers,

Michael...
-- 
michaeld@senet.com.au
Now you owe me one Horst - now about ssh... :-)


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