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Message-ID: <4D7A43D0.30807@redhat.com>
Date: Fri, 11 Mar 2011 08:46:24 -0700
From: Eric Blake <eblake AT redhat DOT com>
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Subject: Re: 'tr' Bug
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On 03/11/2011 08:44 AM, Tim Daneliuk wrote:
> On 3/11/2011 9:39 AM, Eric Blake said this:
>> On 03/11/2011 08:28 AM, Tim Daneliuk wrote:
>>> echo /opt/IBN/df | tr [A-Z] [a-z]
>>>
>>> produces:
>>>
>>>    /opt/xxx/df
>>
>> Let me guess - you have a file named 'x' in the current directory.
>>
>> Quote your arguments, so that the shell won't glob them:
>>
>> echo /opt/IBN/df | tr '[A-Z]' '[a-z]'
>>
>> This is not cygwin-specific.
>>
>=20
> OK, then why the "correct" behavior on FreeBSD 8.2 and RHEL 5.5,
> both running bash I wonder ...

Because you didn't have a one-letter file in the current directory to
provoke glob expansion, and when a glob doesn't match, it is passed
through unchanged to tr.

To reproduce on FreeBSD or RHEL, simply 'touch x' then try again :)

--=20
Eric Blake   eblake AT redhat DOT com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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