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From "John Zhuge (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13093) Discuss whether dfs -ls should escape control characters on terminal
Date Wed, 04 May 2016 22:00:14 GMT
John Zhuge created HADOOP-13093:
-----------------------------------

             Summary: Discuss whether dfs -ls should escape control characters on terminal
                 Key: HADOOP-13093
                 URL: https://issues.apache.org/jira/browse/HADOOP-13093
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs
            Reporter: John Zhuge
            Assignee: John Zhuge


HADOOP-13079 adds option {{-q}} to {{dfs -ls}} to print non-printable characters as "?". This
jira will decide whether to make {{-q}} the default for {{dfs -ls}} on a terminal.

This is a split of HADOOP-13079. The split gives us more time to debate the proper default
behavior and enables different target versions.

To test whether STDOUT is connected to a terminal, I will use {{System.console() != null}},
fully aware its limitation. JNI {{isatty(3)}} is possible but too problematic as pointed out
by [~cmccabe].

I will survey FsShell and hdfs commands and their proper expected default behaviors. Thanks
[~andrew.wang] for the suggestion. More jiras may follow.



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