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FXPREAD

FXPREAD

Name


  FXPREAD

Author


  Craig B. Markwardt, NASA/GSFC Code 662, Greenbelt, MD 20770
  craigm@lheamail.gsfc.nasa.gov
  UPDATED VERSIONs can be found on my WEB PAGE:
      http://cow.physics.wisc.edu/~craigm/idl/idl.html

Purpose


  Internal routine to read from a Unix pipe.

Description



  See the following procedures for appropriate documentation.
    FXGOPEN - open resource
    FXGCLOSE - close resource
    FXGREAD - read from resource
    FXGWRITE - write to resource
    FXGSEEK - seek on resource (i.e., perform POINT_LUN)
    FXGFILTERED - determine if resource is a normal file.

Parameters



  unit - LUN of the pipe command, *not* the cache file.
  buffer - the buffer to accept the data. Data is read in
            *unformatted*.

Side Effects


 
  The pipe is read as needed and the cache is populated.
  The file pointer advances.
  MODIFICATIONS
  Corrected error message, 21 Sep 2000, CM
  Changed copyright notice, 21 Sep 2000, CM
  $Id: fxpread.pro,v 1.2 2001/03/25 18:10:46 craigm Exp $



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