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Re: history -c doesn't reset command counter properly


From: Chet Ramey
Subject: Re: history -c doesn't reset command counter properly
Date: Sat, 10 Mar 2018 14:56:28 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

On 3/10/18 8:27 AM, Janek Warchoł wrote:
> Hello,
> 
> I have noticed a strange behavior when working with bash "history" command.
> Every command in history has its index, and I expected that clearing
> history should reset this index to zero. However, running history -c
> actually decrements this index by HISTSIZE, so that following commands will
> not be numbered from 1.
> 
> This can happen e.g. when you set HISTFILESIZE to a bigger value than
> HISTSIZE. In that case running "history -c; history -r" repeatedly will
> keep incrementing command indices, while I think it should not.

That was changed back in December, 2016, and the change is in the devel
branch.  Look at lib/readline/history.c:clear_history().

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/



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