Re: [Help-bash] get pid of exited process

[Stas Sergeev]

04.01.2016 16:19, Greg Wooledge пишет:
> On Sun, Jan 03, 2016 at 08:10:38PM +0300, Stas Sergeev wrote:
> > Please note that the pids are not re-used, at least not so quickly.
> > OS will not assign the once-used pid to the new process, until all the
> > other possible pids are used too.
> This is not true for all operating systems.  Some of them use random
> numbers for PIDs.
Ah, who cares about non-linux OSes... :)
OK, kidding.

>    The only time you can be sure a PID is what you think
> it is, is when both of the following are true:
>
> a) The PID is that of your direct child.
> b) You have not yet called wait() for that PID to release it.
>
> As suggested previously, if you want the PID of your child for some
> logging purpose, you need to get it BEFORE the child exits.  Not after.
Not for logging.
As I explained in the same mail, I need it for cleanups:
if the program crashes, the script should remove the
stalled sockets/fifos that usually embed the pid in their
names. So in fact i need it after the process already died.
What other cleanup scheme would you suggest, that is
as simple as that?