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Re: bash bug with root account

From: Chet Ramey
Subject: Re: bash bug with root account
Date: Wed, 10 Jul 2019 09:15:14 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.7.2

On 7/10/19 4:01 AM, westlake wrote:
> System: linux 64-bit (debian stable, latest release buster)
> Bash version: GNU bash, version 5.0.3(1)-release (x86_64-pc-linux-gnu)
> This bug occurs with the root account,
> If a normal user types "su -l<enter>" and issues this "ls" statement,
> ls -ld .!(?(.))
> the output is without error. (the output lists all dot items with the
> exception of the annoying literals "." and "..")

This account has the `extglob' shell option enabled.

> If "su<enter>" (without the -l),  is given instead, then "!" is taken to be
> something else as though I am attempting to fire up a bash history command
> (eg: "!100" to run the 100th command from bash's history list)
> The error with ls -ld .!(?(.)) after doing "su<enter>"
> "bash: !: event not found"

This account does not.

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

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