From: David A. Wheeler <dwheeler@dwheeler.com>
Date: Sun, 01 May 2005 15:51:44 GMT
Subject: Re: How to get bash to shut up about SIGPIPE?
Message-ID: <4274FB10.6090600@dwheeler.com>
In-Reply-To: <E1DSDER-0000kS-00@gondolin.me.apana.org.au>

Herbert Xu wrote:
> This issue has been around for years.  The discussion that led to
> Debian setting this option may be helpful in understanding it:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=10494

Thanks for the pointer.  That discussion points
to some alternative fixes that may be more useful
(instead of installing a repaired shell).

One approach is to install a trap for SIGPIPE in
non-terminating command in a pipeline where the
later items might not process all the data, e.g.:
   (trap {} SIGPIPE; find .) | head -1

<rant>
THIS IS A REALLY, REALLY BAD DECISION BY THE BASH TEAM.
Why should the default be "create annoying spurious error report?".
This should at least be a run-time settable option,
with the OPPOSITE default.
</rant>

Which is sad, bash is generally reasonably good.
I guess now I have to say "bash, once properly configured
using DONT_REPORT_SIGPIPE, is reasonably good."


--- David A. Wheeler