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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3098) dfs -chown does not like "_" underscore in user name
Date Thu, 27 Mar 2008 03:05:25 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582506#action_12582506
] 

Raghu Angadi commented on HADOOP-3098:
--------------------------------------

Here is the proposal:

Period (.) no longer separates user name and group (so raghu.user just specifies a user name).
Linux allows it but it Solaris and others does not seem to. We will explicitly mention it
in help message. We could escape it as Nicholas suggested but it might be confusing to the
user any way... 

Owen, should we include @ and '/' now? We could always add these later.

With these patch is going to be pretty simple.



> dfs -chown does not like "_" underscore in user name
> ----------------------------------------------------
>
>                 Key: HADOOP-3098
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3098
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.16.0, 0.16.1
>            Reporter: Koji Noguchi
>            Assignee: Raghu Angadi
>            Priority: Blocker
>             Fix For: 0.16.2
>
>
> :~$ hadoop dfs -chown aaa_bbb  /user/knoguchi/test.txt
> chown: 'aaa_bbb' does not match expected pattern for [owner][:group].
> in 0.16.1, only alphabets and numbers are allowed.  Shouldn't '_' be allowed?
> I couldn't find any standard, but in Solaris10, it's defined as 
> http://docs.sun.com/app/docs/doc/816-5174/6mbb98uhg?a=view
> bq. The login (login) and role (role) fields accept a string of no more than eight bytes
consisting of characters from the set of alphabetic characters, numeric characters, period
(.), underscore (_), and hyphen (-). The first character should be alphabetic and the field
should contain at least one lower case alphabetic character. A warning message is displayed
if these restrictions are not met.

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