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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9296) ShellBasedUnixGroupMapping should support group names with space
Date Fri, 23 Oct 2015 16:11:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14971252#comment-14971252
] 

Allen Wittenauer commented on HDFS-9296:
----------------------------------------

bq. AD permits group names with space (e.g. "Domain Users").

Yes, but that doesn't mean they are POSIX compliant, which much match this regex: [_a-z][-0-9_a-z]*\$?
.

So a definite -1 on this.

> ShellBasedUnixGroupMapping should support group names with space
> ----------------------------------------------------------------
>
>                 Key: HDFS-9296
>                 URL: https://issues.apache.org/jira/browse/HDFS-9296
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>
> In a typical configuration, group name is obtained from AD through SSSD/LDAP. AD permits
group names with space (e.g. "Domain Users").
> Unfortunately, the present implementation of ShellBasedUnixGroupMapping parses the output
of shell command "id -Gn", and assumes group names are separated by space. 
> This could be achieved by using a combination of shell scripts, for example, 
> bash -c 'id -G weichiu | tr " " "\n" | xargs -I % getent group "%" | cut -d":" -f1'
> But I am still looking for a more compact form, and potentially more efficient one.



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