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Re: [Help-bash] Glob star pattern does not match files beginning with a

From: Stephane Chazelas
Subject: Re: [Help-bash] Glob star pattern does not match files beginning with a period
Date: Tue, 21 Jul 2015 06:35:12 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

2015-07-15 14:19:49 -0600, Eric Blake:
> Both of these three-glob approaches can be used to obtain all file names
> that are not '.' or '..':
> ls -d * .[!.]* ..?*
> or:
> ls -d * .??* .[!.]
> but you still have to deal with the fact that unless nullglob  is
> enabled to eliminate a glob that has no matches, you are then passing
> unexpanded globs to ls that may result in listing a valid file name
> twice

That should be:

ls -d -- * .[!.]* ..?*

Note that that one will not list files twice since those
patterns don't match each other.

> There is no two-glob pattern that can cover all file names except for .
> and .., unless you resort to bash's extended globs (at which point, you
> might as well do it in a single glob that uses alternation).

For completeness, note that setting GLOBIGNORE do a non-empty
string turns dotglob on, so:

ls -d -- *

would work. With GNU ls, you can then (with dotblog) also do:

ls -dU -- *

to avoid the double sorting.

For ls of course, you only need "ls -A" here.

Note that zsh globs have a syntax to turn on those various
options on a per glob basis, which IMO is a much better
approach. I wish bash had something similar:

ls -d -- *(D)

(for dotglob, *(N) for nullglob...)


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