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Re: anomalous behaviour of ls command

From: Ilkka Virta
Subject: Re: anomalous behaviour of ls command
Date: Tue, 30 Jan 2018 15:48:34 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

On 30.1. 20:54, ken young wrote:
        I have a directory with four files A Z a z only.
        "ls [A-Z]" displays only 3 files A Z   z       ;a is missing
        "ls [a-z]" displays only 3 files A   a z       ;Z is missing

Basically, your locale orders the letters as aAbBcC...yYzZ, so Z comes after z and [a-z] misses it. Similarly for a and [A-Z]. You can see the ordering if you do 'echo *' or such.

'shopt -s globasciiranges' should make [a-z] only match the 26 ASCII lowercase letters, and 'shopt -s nocaseglob' should make the globs match regardless of lettercase (it would also make a* match A).

Ilkka Virta / address@hidden

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