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Re: [Help-bash] xtrace output order
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From: |
Greg Wooledge |
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Subject: |
Re: [Help-bash] xtrace output order |
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Date: |
Fri, 27 Sep 2013 10:04:53 -0400 |
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User-agent: |
Mutt/1.4.2.3i |
On Fri, Sep 27, 2013 at 01:48:13PM +0200, Bob Hope wrote:
> Should the output of set -x in a bash script be the same as the order it is
> executed in?
>
> # cat b.sh
> #!/bin/bash
> /usr/bin/tail -n 100 messages | /bin/grep blah | md5sum
>
> # bash -x b.sh
> + md5sum
> + /bin/grep blah
> + /usr/bin/tail -n 100 messages
> d41d8cd98f00b204e9800998ecf8427e -
They're all executed simultaneously. Which one you happen to see first
in the trace output is the result of a race condition, and therefore not
predictable.