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Re: chown 5.0.91 bug, regarding "." and ":"
From: |
Jim Meyering |
Subject: |
Re: chown 5.0.91 bug, regarding "." and ":" |
Date: |
Sat, 06 Dec 2003 14:30:53 +0100 |
Dylan Shell <address@hidden> wrote:
> program reports its version as 5.0.91.
> it seems to no longer accept a user followed by a group with a separator
> as a full-stop (the colon works fine).
Right. Note that `.' is a valid part of a user name or group name
while `:' is not. See below for how to enable the old `.'-accepting
behavior on your system.
> this means I get:
> # chown root. *
> chown: `root.': invalid user
> # chown root.audio *
> chown: `root.': invalid user
>
> but:
> # chown root *
> succeeds, as does
> # chown root:audio *
> etc...
That's not a bug.
The NEWS file (and announcement) says this:
- chown: `.' is no longer recognized as a separator in the OWNER:GROUP
specifier on POSIX 1003.1-2001 systems. If chown *was not* compiled
on such a system, then it still accepts `.', by default. If chown
was compiled on a POSIX 1003.1-2001 system, then you may enable the
old behavior by setting _POSIX2_VERSION=199209 in your environment.
Or look at the authoritative documentation by running `info chown':
Some older scripts may still use `.' in place of the `:' separator.
POSIX 1003.1-2001 (*note Standards conformance::) does not allow that,
but you may be able to work around the compatibility problems by setting
`_POSIX2_VERSION=199209' in your environment. New scripts should avoid
the use of `.' because GNU `chown' may fail if OWNER contains `.'
characters.
> Note, that this is the exact opposite effect that was intended by
> deprecating the ":" option. The wrong one got cancelled.
`wrong' according to whom?
> Can someone explain the reason for doing so.
POSIX compliance.