[ale] bash pid

[Don Lachlan]

On Wed, Mar 24, 2010 at 12:25 PM, Jim Kinney <jim.kinney at gmail.com> wrote:
> I have a bash script that performs a sequence of tasks. I would like to be
> able to get the pid of the individual tasks for probable kill needs.

Jim,

Looking at your script and description, I don't understand what you're
trying to do, except that you're not using background processes. So...

In cases where you're launching a daemon, you can use your system's
method for launching daemons.

In Debian and Ubuntu, use start-stop-daemon
In OpenSuSE and SLES, use startproc
In CentOS and RHEL, use the functions in /etc/init.d/functions

If you're looking for the PID of a foreground process, you cannot do
that from the parent process. From a separate process, you do want
'ps' and 'awk':

$ procpid=`ps -eo 'pid,args' | awk '/uniquestringofprocess/ && !/awk/
{print $1}'`

-Lachlan


>
> For example:
>
> #!/bin/bash
>
> my_pid=$$  # get's the pid of the main script
>
> function do_sleep {
>  # sleeps in certain conditions
>  if [ <condition> ]; then sleep 2m; fi
> }
>
> for poo in $( <generated list of crap>); do
>  psql -c "vacuum freeze poo;"
>  do_sleep
> done
>
> So I need to be able to get the pid of the sleep and the psql. $! will give
> the pid of a backgrounded shell process but that's not making sense in the
> psql call case. Could run a ps |grep <cmd> and strip out the extra or even
> pidof <cmd> but all require putting things in a background state.
>
> --
> --
> James P. Kinney III
> Actively in pursuit of Life, Liberty and Happiness
>
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
>