Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!ncar!bierstadt.scd.ucar.edu!morreale
From: morreale@bierstadt.scd.ucar.edu (Peter W. Morreale)
Newsgroups: comp.lang.fortran
Subject: Re: meshing UNIX file descriptors and FORTRAN logical units
Message-ID: <11985@ncar.ucar.edu>
Date: 30 Jun 91 15:28:15 GMT
References: <51446@ut-emx.uucp>
Sender: news@ncar.ucar.edu
Distribution: usa
Organization: Scientific Computing Division/NCAR, Boulder, CO
Lines: 24

In article <51446@ut-emx.uucp> pefv700@perv.pe.utexas.edu writes:
>
>Does anyone know how to determine the file descriptor (useful for system
>calls) that matches a FORTRAN logical unit under UNIX?
>

  I think you will find that this is a vendor specific problem.
  I needed to do this with UNICOS 5.1.11, semi-quoting from a Crayon:

     "It's d*mm near impossible."


  The reason being (at least on UNICOS) that the file descriptor is an
  array index pointing to a structure within the kernal.  (ie: There is isn't
  a straight-forward mapping between Fortran Unit numbers and system
  file descriptrors.....)

-PWM

--
------------------------------------------------------------------
Peter W. Morreale                  email:  morreale@ncar.ucar.edu
Nat'l Center for Atmos Research    voice:  (303) 497-1293
Scientific Computing Division