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View Code? Open in Web Editor NEWHaskell HDFS binding
Haskell HDFS binding
ls (FileSystem fs) p =
withCString p $ \path ->
alloca $ \numptr -> do
cinfo <- throwErrnoIfNull "ls" $ ...
But Null is a valid return value for empty directories:
/**
* hdfsListDirectory - Get list of files/directories for a given
* directory-path. hdfsFreeFileInfo should be called to deallocate memory.
* @param fs The configured filesystem handle.
* @param path The path of the directory.
* @param numEntries Set to the number of files/directories in path.
* @return Returns a dynamically-allocated array of hdfsFileInfo
* objects; NULL on error or empty directory.
* errno is set to non-zero on error or zero on success.
*/
LIBHDFS_EXTERNAL
hdfsFileInfo *hdfsListDirectory(hdfsFS fs, const char* path,
int *numEntries);
Please note that older releases of libhdfs C++ API documentation are incorrect about that.
See also: https://issues.apache.org/jira/browse/HDFS-8407
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