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https://issues.apache.org/jira/browse/HDFS-711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Colin Patrick McCabe updated HDFS-711:
--------------------------------------

    Description: 
in HADOOP/src/c++/libhdfs/hdfs.h

The following function document is incorrect:
/*   @param mtime new modification time or 0 for only set access time in seconds
      @param atime new access time or 0 for only set modification time in 
seconds
*/
    int hdfsUtime(hdfsFS fs, const char* path, tTime mtime, tTime atime);

Currently, setting mtime or atime to 0 has no special meaning. That is, file 
last modified time will change to 0 if the mtime argument is 0.

libhdfs should translate mtime = 0 or atime = 0 to the special value -1, which 
in HDFS means "don't change this time."

  was:
in HADOOP/src/c++/libhdfs/hdfs.h

The following function document is incorrect:
/*   @param mtime new modification time or 0 for only set access time in seconds
      @param atime new access time or 0 for only set modification time in 
seconds
*/
    int hdfsUtime(hdfsFS fs, const char* path, tTime mtime, tTime atime);

Setting mtime or atime to 0 has no special meaning. That is, file last modified 
time will change to 0 if the mtime argument is 0.


        Summary: hdfsUtime does not handle atime = 0 or mtime = 0 correctly  
(was: incorrect document in libhdfs api (hdfs.h))
    
> hdfsUtime does not handle atime = 0 or mtime = 0 correctly
> ----------------------------------------------------------
>
>                 Key: HDFS-711
>                 URL: https://issues.apache.org/jira/browse/HDFS-711
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: documentation
>    Affects Versions: 0.20.1
>            Reporter: freestyler
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-711.001.patch
>
>
> in HADOOP/src/c++/libhdfs/hdfs.h
> The following function document is incorrect:
> /*   @param mtime new modification time or 0 for only set access time in 
> seconds
>       @param atime new access time or 0 for only set modification time in 
> seconds
> */
>     int hdfsUtime(hdfsFS fs, const char* path, tTime mtime, tTime atime);
> Currently, setting mtime or atime to 0 has no special meaning. That is, file 
> last modified time will change to 0 if the mtime argument is 0.
> libhdfs should translate mtime = 0 or atime = 0 to the special value -1, 
> which in HDFS means "don't change this time."

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