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  1. Hadoop Common
  2. HADOOP-13079

Add -q option to Ls to print ? instead of non-printable characters

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.6.0
    • 2.8.0, 3.0.0-alpha1
    • None
    • None

    Description

      Add option -q to "hdfs dfs -ls" to print non-printable characters as "?". Non-printable characters are defined by isprint(3) 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.

      Attachments

        1. HADOOP-13079.001.patch
          12 kB
          John Zhuge
        2. HADOOP-13079.002.patch
          17 kB
          John Zhuge
        3. HADOOP-13079.003.patch
          18 kB
          John Zhuge
        4. HADOOP-13079.004.patch
          18 kB
          John Zhuge

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            jzhuge John Zhuge
            jzhuge John Zhuge
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              Updated:
              Resolved:

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