Re: [MLUG] basic Unix pipe/exit code problem

[Scott Hussey <EMAIL:PROTECTED>]

On Thu, 3 Mar 2005 12:24:49 -0600, Mark Rages <EMAIL:PROTECTED> wrote: 
> I have reduced my problem to this:
> 
> ( /bin/false | gzip > /dev/null ) || echo fail
> 
> I want it to echo "fail" because /bin/false gives a nonzero exit code.
>  But it doesn't.  What am I missing?

Google "PIPESTATUS" or search for it in the bash man page. 

       PIPESTATUS
              An  array  variable (see Arrays below) containing a list of exit
              status values from the processes in  the  most-recently-executed
              foreground pipeline (which may contain only a single command).


Scott-Husseys-Computer:~/dev/html scott$ false | gzip > /dev/null
Scott-Husseys-Computer:~/dev/html scott$ echo ${PIPESTATUS[*]}
1 0

-- 
Scott Hussey
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