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Date: Wed, 12 Apr 2006 12:05:04 -0400 (EDT)
From: Igor Peshansky <pechtcha AT cs DOT nyu DOT edu>
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Subject: Re: XP embedded
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On Wed, 12 Apr 2006, Christopher Faylor wrote:

> On Wed, Apr 12, 2006 at 07:43:33AM -0400, Jeff Lange wrote:
> >/dev/zero does work properly.  I changed line 68 in /etc/profile to
> >use /dev/zero instead of /dev/null and I no longer get the bash error
> >on start up.

FWIW, /dev/zero is not always the proper substitution for /dev/null (i.e.,
on input redirection, it will work differently).

> >Perhaps the cygwin libraries should be modified so that if the windows
> >NUL device doesn't exist, it should use a different method.
>
> Sorry, no.  We already have enough special cases in the code.  We're not
> going to start adding more for XP Embedded.

What I'm wondering is whether we need the Windows NUL device at all for
implementing /dev/null...  It's rather trivial[*] to implement one without
resorting to a Windows device.  Would there be any way of distinguishing
an emulation from the real NUL device?
	Igor
[*] The implementation would be substantially the same as that for
/dev/zero, except for removing the test for FH_FULL and always setting len
to 0 in read().
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha AT cs DOT nyu DOT edu | igor AT watson DOT ibm DOT com
ZZZzz /,`.-'`'    -.  ;-;;,_		Igor Peshansky, Ph.D. (name changed!)
     |,4-  ) )-,_. ,\ (  `'-'		old name: Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

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