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From "Mariappan Asokan (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2461) Support HDFS file name globbing in libhdfs
Date Mon, 17 Oct 2011 21:31:12 GMT
Support HDFS file name globbing in libhdfs
------------------------------------------

                 Key: HDFS-2461
                 URL: https://issues.apache.org/jira/browse/HDFS-2461
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: libhdfs
            Reporter: Mariappan Asokan
            Priority: Minor


This is to enhance the C API in libhdfs to support HDFS file name globbing.  The proposal
is to keep the new API simple and return a list of matched HDFS path names.  Callers can use
existing hdfsGetPathInfo() to get additional information on each of the matched path.  Following
code snippet shows the proposed API enhancements:
{code:title=hdfs.h}
/**
 * hdfsGlob - Get all the HDFS file names that match a glob pattern.  The
 * returned result will be sorted by the file names.  The last element in the
 * array is NULL.  The function hdfsFreeGlob() should be called to free this
 * array and its contents.
 * @param fs The configured filesystem handle.
 * @param globPattern The glob pattern to match file names against.  Note that
 * this is not a POSIX regular expression but rather a POSIX glob pattern.
 * @return Returns a dynamically-allocated array of strings; if there is no
 * match, an array with one entry that has a NULL value will be returned.  If
 * there is an error, NULL will be returned.
 */
char ** hdfsGlob(hdfsFS fs, const char *globPattern);

/**
 * hdfsFreeGlob - Free up the array returned by hdfsGlob().
 * @param globResult The array of dynamically-allocated strings returned by
 * hdfsGlob().
 */
void hdfsFreeGlob(char **globResult);
{code}

Please comment on the above proposed API.  I will start the implementation and testing.  However,
I need a committer to work with.

Thanks.

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