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

[Mike Miller <EMAIL:PROTECTED>]

On Thu, 3 Mar 2005, Mark Rages 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?


Maybe I'm not understanding this.  If you are gzipping from stdin, don't 
you need to do it this way:

     | gzip -c - >

Maybe that isn't your intention.  I'm not sure how gzip is used in a path 
when it isn't reading stdin and writing to stdout.

I don't quite understand 'false'.  Where is the exit code detected?  It 
doesn't go to stderr or to stdout.

Mike
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