Bug 8040 - chown will not work on some account names
Summary: chown will not work on some account names
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: fileutils
Version: 6.1
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Bernhard Rosenkraenzer
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 1999-12-29 07:05 UTC by Richard Fairthorne
Modified: 2008-05-01 15:37 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2000-01-17 13:54:37 UTC

Attachments (Terms of Use)

Description Richard Fairthorne 1999-12-29 07:05:22 UTC
chown incorrectly identifies account names containing periods as being
invalid. You may only chown files to such users by using numeric user-id's.

I discovered this problem while writing a script on the SPARC platform,
but I'm hazarding a wild guess that it's not a SPARC specific problem.

Here's how to duplicate it.

useradd toecheese.com
mkdir any_dir
chown toecheese.com any_dir

The chown will fail.

Comment 1 Bernhard Rosenkraenzer 2000-01-17 13:54:59 UTC
It's not a bug, it's POSIX compliance.
You're not supposed to use a . in usernames.

chown toecheese.com blah

is equivalent to

chown toecheese file
chgrp com file

If you absolutely need to use a . in usernames, you can work around this by
using the User ID instead of the name, for example
chown `id toecheese.com` file

Comment 2 Bernhard Rosenkraenzer 2000-01-17 13:57:59 UTC
Sorry, `id -u toecheese.com` of course.

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