You are viewing a plain text version of this content. The canonical link for it is here.
Posted to common-issues@hadoop.apache.org by "John Zhuge (JIRA)" <ji...@apache.org> on 2016/05/02 17:23:12 UTC
[jira] [Created] (HADOOP-13079) Add -q to fs -ls to print
non-printable characters
John Zhuge created HADOOP-13079:
-----------------------------------
Summary: Add -q to fs -ls to print non-printable characters
Key: HADOOP-13079
URL: https://issues.apache.org/jira/browse/HADOOP-13079
Project: Hadoop Common
Issue Type: Bug
Reporter: John Zhuge
Assignee: John Zhuge
Add option {{-q}} to "hdfs dfs -ls" to print non-printable characters as "?". Non-printable characters are defined by [isprint(3)|http://linux.die.net/man/3/isprint] according to the current locale.
Default to {{-q}} behavior on terminal; otherwise, print raw characters. See the difference in these 2 command lines:
* {{hadoop fs -ls /dir}}
* {{hadoop fs -ls /dir | od -c}}
In C, {{isatty(STDOUT_FILENO)}} is used to find out whether the output is a terminal. Since Java doesn't have {{isatty}}, I will use JNI to call C {{isatty()}} because the closest test {{System.console() == null}} does not work in some cases.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org