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Re: pipefail bug
From: |
Chet Ramey |
Subject: |
Re: pipefail bug |
Date: |
Mon, 04 Dec 2006 11:53:03 -0500 |
User-agent: |
Thunderbird 1.5.0.8 (Macintosh/20061025) |
John Kelly wrote:
> #!/bin/bash
>
> # With -e -o pipefail, this script should exit immediately upon returning
> # from the pipeline, since grep does not match its string, and returns 1.
This is not true, strictly speaking. The `-e' option applies to only
simple commands. Bash does make `-e' apply to pipelines whose last
element is a simple command, but only for compatibility with historical
shell implementations. That accounts for the apparent anomaly.
Posix is not exactly clear on this topic, but I believe bash's
interpretation is conformant.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
Live Strong. No day but today.
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
- pipefail bug, John Kelly, 2006/12/02
- Re: pipefail bug,
Chet Ramey <=