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From "Andy Isaacson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1331) dfs -test should work like /bin/test
Date Mon, 29 Oct 2012 20:38:12 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Andy Isaacson updated HDFS-1331:

    Attachment: hdfs1331.txt

Attaching patch for trunk
* implements {{-test -s}} and {{-test -f}}
* adds tests for them

This patch depends on HADOOP-8994 being applied first -- the patch might apply without HADOOP-8994
but it will fail in TestDFSShell.  I'll upload a second patch with the combined diffs so that
jenkins will test it successfully.
> dfs -test should work like /bin/test
> ------------------------------------
>                 Key: HDFS-1331
>                 URL: https://issues.apache.org/jira/browse/HDFS-1331
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: tools
>    Affects Versions: 0.20.2
>            Reporter: Allen Wittenauer
>            Assignee: Andy Isaacson
>            Priority: Minor
>         Attachments: hdfs1331.txt, hdfs1331-with-hadoop8994.txt
> hadoop dfs -test doesn't act like its shell equivalent, making it difficult to actually
use if you are used to the real test command:
> hadoop:
> $hadoop dfs -test -d /nonexist; echo $?
> test: File does not exist: /nonexist
> 255
> shell:
> $ test -d /nonexist; echo $?
> 1
> a) Why is it spitting out a message? Even so, why is it saying file instead of directory
when I used -d?
> b) Why is the return code 255? I realize this is documented as '0' if true.  But docs
basically say the value is undefined if it isn't.
> c) where is -f?
> d) Why is empty -z instead of -s ?  Was it a misunderstanding of the man page?

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