From help-request at octave dot org Tue Dec 27 10:15:32 2005
Subject: Re: [OctDev] isunix() returns 1 under cygwin
From: Etienne Grossmann <etienne at cs dot uky dot edu>
To: Quentin Spencer <qspencer at ieee dot org>
Cc: William Poetra Yoga Hadisoeseno <williampoetra at gmail dot com>,         Andy Adler <adler@ncf.ca>, etienne@cs.uky.edu,         Octave Help <help@octave.org>, etienne@cs.uky.edu
Date: Tue, 27 Dec 2005 11:06:49 -0500


  Hi All,

thx for the answeres. In my case, checking
octave_config_info("canonical_host_type") for "win" or "linux" seems
to do what I want.

  Cheers,

  Etienne

On Tue, Dec 27, 2005 at 08:10:56AM -0600, Quentin Spencer wrote:
# William Poetra Yoga Hadisoeseno wrote:
# 
# >On 12/27/05, Andy Adler <adler at ncf dot ca> wrote:
# > 
# >
# >>The semantics of 'isunix' depends on what you mean by UNIX.
# >>Strictly speaking, only certain well defined OSes are UNIX. Linux,
# >>for example, is not.
# >>
# >>On the other hand, maybe UNIX means OSes that behave like
# >>UNIX in most ways. cygwin has UNIX process semantics
# >>(ie. fork) and file semantics (symlinks, select on files, etc.)
# >>
# >>So, is cygwin UNIX? Clearly, a mingwin octave is not unix.
# >>
# >>Maybe isunix should make a specific test.
# >>
# >>   
# >>
# >
# >In Octave 2.9.4, isunix() is implemented as
# >
# >function retval = isunix ()
# >
# > if (nargin == 0)
# >   retval = octave_config_info ("unix");
# > else
# >   usage ("isunix ()");
# > endif
# >
# >endfunction
# >
# >AFAIK, it returns 1 on Cygwin (I know this by reading the sources, so
# >I'm not very sure)
# >
# > 
# >
# 
# 
# If you look at the contents of octave_config_info, I think there are 
# other things you could use to extract the system type. On my linux box, 
# I see "unix = 1" and "windows = 0". I'm guessing that under cygwin you 
# get "unix = 1" and "windows = 1", so maybe testing 
# octave_config_info("windows") will always give you the correct answer 
# whether octave was built in cygwin or mingw. If all else fails, you 
# could try parsing octave_config_info("canonical_host_type"), which 
# usually contains "linux" on linux systems and "cygwin" (if I remember 
# correctly) on cygwin.
# 
# -Quentin
# 

-- 
Etienne Grossmann ------ http://www.cs.uky.edu/~etienne



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