Re: pipefail bug

[Chet Ramey]

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
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Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/