Re: Get previous command history number from a script

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Article #4009

#4009

From: hanzhengxu
Date: Wed, 03 Jun 2009 09:10

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On Jun 3, 3:44 pm, Ben <bgol...@gmail.com> wrote:
> I've already figured out a way to do this but I suspect there are
> simpler/faster/more elegant solutions that exist.
>
> The objective is to get the command history number of the command that
> was just executed, but do it from a script (which seems to prevent
> access to the $HISTCMD variable, which would've been nice; any
> thoughts on this?). Here's my solution:
>
> history 2| sed -n 1p| sed -e "s/^\s*\([0-9]\+\).*/\1/";
>
> Notice the (command complexity) / (problem complexity) ratio. Can
> anyone improve it?

Any good usages for history number in scripts?
It seems should use 'set -o history' to enable history in a script.

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From: hanzhengxu@gmail.com
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Subject: Re: Get previous command history number from a script
Date: Wed, 3 Jun 2009 02:10:12 -0700 (PDT)
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