From: Jos Backus <jos@...>
Date: 2011-10-07T01:48:09+09:00
Subject: Re: after gem released v 0.8.1

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Hi,

On Thu, Oct 6, 2011 at 9:21 AM, Roger Pack <rogerpack2005@gmail.com> wrote:

> > % help wait
>


> > wait: wait [n]
> >     Wait for the specified process and report its termination status.
> > If
> >     N is not given, all currently active child processes are waited for,
> >     and the return code is zero.  N may be a process ID or a job
> >     specification; if a job spec is given, all processes in the job's
> >     pipeline are waited for.
>
> Perhaps you can help me understand its use then.  Not to be
> argumentative, I'd be happy to be proven wrong here :)
>
> Background:
>
> If I have a background process in a terminal, of PID 1714, then in that
> same terminal, I run
> $ wait 1714
> it waits for PID 1714 to exit.
>
> However if I go to a different terminal, and run the same, I get the
> following:
> $ wait 1714
> bash: wait: pid 1714 is not a child of this shell
>
> Am I misunderstanding?
>

You are not.

Solaris has a command called pwait that serves a similar purpose:

http://www.solarisinternals.com/wiki/index.php/Processes#Wait_for_Process_Completion:_pwait

Jos


> -roger-
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 
Jos Backus
jos at catnook.com

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