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bug#21065: Small bug in touch
From: |
Eric Blake |
Subject: |
bug#21065: Small bug in touch |
Date: |
Wed, 15 Jul 2015 09:31:05 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
tag 21065 notabug
thanks
On 07/15/2015 07:25 AM, Rickard Norlander wrote:
> touch version 8.23
>
> Command:
> $ touch -- '-'
> Happens:
> Returns successfully, but no file is created (if file exists, timestamp is
> not updated)
Like many other tools, '-' is special-cased in touch to mean operation
on stdin:
$ touch --help | grep -A1 ' - '
A FILE argument string of - is handled specially and causes touch to
change the times of the file associated with standard output.
So you successfully touched stdin (in your case, /dev/tty). If you want
to create a file named '-', use 'touch ./-'.
See also this FAQ:
https://www.gnu.org/software/coreutils/faq/coreutils-faq.html#How-do-I-remove-files-that-start-with-a-dash_003f
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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