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Re: trap problem

X-seq: zsh-workers 5656
From: Peter Stephenson <pws@xxxxxxxxxxxxxxxxx>
To: Thomas Ziehmer <ziehmer@xxxxxxxxxxxxxx>, zsh-workers@xxxxxxxxxxxxxx (Zsh hackers list)
Subject: Re: trap problem
Date: Fri, 05 Mar 1999 12:24:09 +0100
In-reply-to: "Thomas Ziehmer"'s message of "Fri, 05 Mar 1999 12:32:12 NFT." <19990305123212.A24019@xxxxxxxxxxxxxxxxxxxxx>
Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm

Thomas Ziehmer wrote:
> Hallo, 
> with zsh 3.1.5 (the only tested version) on SGI and HP, but not on Linux, AIX
>  
> and Solaris (there it works correct), the following script produces a wrong
> output:
>
> [script omitted]
>
> The output of the second ps-command is not shown.
> Why?

Yes, I get this too on IRIX 6.2.  However, changing the arguments to the
second ps (adding e.g -u $USER or -e) does produce output.  So I think the
problem is that ps is getting confused somehow by the process group, and
simply not finding any processes to report.  Whether this is a bug due to
zsh setting up the process wrong, or simply ps's own confusion, is rather
hard to tell.

-- 
Peter Stephenson <pws@xxxxxxxxxxxxxxxxx>       Tel: +39 050 844536
WWW:  http://www.ifh.de/~pws/
Dipartimento di Fisica, Via Buonarroti 2, 56127 Pisa, Italy

References:
- trap problem
  - From: Thomas Ziehmer

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