[lug] checking bg processes' exit status

[Jeffrey Haemer]

Nick,

And here's one more, sometimes-useful, cheap trick:

http://seejeffrun.blogspot.com/2008/03/color-coding-my-prompt.html

On Mon, Mar 10, 2008 at 11:03 AM, Nick Golder <nrg at nirgo.net> wrote:

> On 2008-03-04 11:29 -0700, Jeffrey Haemer wrote:
> > Nick,
> >
> > The biggest problem is saving $? for each command, especially when
> you're
> > throwing some or all of them into the background, so they run in
> parallel.
> >
> > An easy solution, if practical, is to wrap each process in a shell
> script
> > that saves its exit status.
> > Thus
> >
>
> Thanks for the example!  I was trying to do something very similar sans
> the extra script.  I was trying to use a function that gets background'd
> and uses variable to return an exit code.  It's ends up not being all
> that elegant since bash doesn't have a garbage collector - all I end up
> doing is polluting the variable space.  I could just go through and
> unset all of the variables -or- I could just use your example.  When I
> have time I am going to try get this going.  One of the targets is a
> read-only filesystem that have nothing that is easily writeable (not my
> design)...
>
> >
> > *$ cat foo*
> > > #!/bin/bash
> > > source ./logging.sh
> > > ls $*       # your command goes here
> > > *$ cat logging.sh*
> > > # save a log, with the error status
> > >
> > > rm -f $0.[0-9]* $0.out
> > > LOG=$0.out
> > > exec &>$LOG
> > > trap 'mv $LOG ${LOG/out/$?}' EXIT
> > > *$ foo; ls*
> > > foo
> > > foo.0
> > > *$ foo bogusfile; ls*
> > > foo
> > > foo.2
> >
> >
> > Hope this helps.
> >
> > On Tue, Mar 4, 2008 at 10:26 AM, Nick Golder <nrg at nirgo.net> wrote:
> >
> > > I have a bash script that is setting a series of processes in the
> > > background and I want to see what their exit codes are.  I have played
> > > around trying to find a way to do it and I haven't found a reliable
> way,
> > > yet.  Any suggestions?
> > >
> > >
> > > --
> > > Nick Golder
> > > _______________________________________________
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> > >
> >
> >
> >
> > --
> > Jeffrey Haemer <jeffrey.haemer at gmail.com>
> > 720-837-8908 [cell]
> > http://goyishekop.blogspot.com
>
> > _______________________________________________
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>
>
>
> --
> Nick Golder
> _______________________________________________
> Web Page:  http://lug.boulder.co.us
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> Join us on IRC: lug.boulder.co.us port=6667 channel=#colug
>



-- 
Jeffrey Haemer <jeffrey.haemer at gmail.com>
720-837-8908 [cell]
http://goyishekop.blogspot.com
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