Streaming command should be able to take its input from a "file", rather then 
from stdin
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                 Key: HADOOP-2235
                 URL: https://issues.apache.org/jira/browse/HADOOP-2235
             Project: Hadoop
          Issue Type: Improvement
          Components: contrib/streaming
            Reporter: arkady borkovsky


In some cases, especially when a streaming command is a 3rd party or legacy 
application, 
it is impossible of inconvenient to make it take its input from stdin.
The command may require that the input file name is specified as a command line 
option, or the input file name is hard coded.

The streaming infrastructure should allow to specify a name that can be used in 
open() to create an input stream equivalent to what would be fed to a streaming 
command as stdin by default.

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