Re: PIPESTATUS inconsistent behavior in 3.0

[Chet Ramey]

Frank Wang wrote:

> Machine Type: i386-redhat-linux-gnu
> 
> Bash Version: 3.0
> Patch Level: 16
> Release Status: release
> 
> Description:
>         Here is what I got from my fc4 box.
> [frank@twinhead ~]$ echo $BASH_VERSION
> 3.00.16(1)-release
> [frank@twinhead ~]$ ls | bogus_command | wc
>       0       0       0
> [frank@twinhead ~]$ echo ${PIPESTATUS[@]}
> 141 127 0

This is not a bug.  The exit status of `ls' can vary, depending on
whether or not it's killed by SIGPIPE or manages to write all of its
output before exiting.  When it's killed by SIGPIPE -- writing to a
pipe with no reader -- the exit status is 141.  When it completes
writing its output, the exit status will be 0.  The same goes for
`tr'.

Chet
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet )
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Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/