[jira] [Commented] (HADOOP-10246) define FS permissions model with tests

["Colin Patrick McCabe (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-10246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13881474#comment-13881474 ] 

Colin Patrick McCabe commented on HADOOP-10246:
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I agree that we should have more tests for this.  However, the current behavior seems correct to me.  It's modelled closely on the traditional POSIX behavior, where {{mkdir}} honors {{umask}}, but {{chmod}} does not.  Anything else would be surprising for users coming from traditional filesystems.

Another reason for the current behavior is that if  {{chmod}} consulted {{umask}}, there would be no way for users to set less restrictive permissions than specified in {{umask}}.  This is contrary to the purpose of {{umask}}, which is just to be a helpful default, not a hard constraint.

> define FS permissions model with tests
> --------------------------------------
>
>                 Key: HADOOP-10246
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10246
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs
>            Reporter: Steve Loughran
>            Priority: Minor
>
> It's interesting that HDFS mkdirs(dir, permission) uses the umask, but setPermissions() does not
> The permissions model, including umask logic should be defined and have tests implemented by those filesystems that support permissions-based security



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