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Date: Mon, 30 Jan 2006 00:29:13 -0800
From: Yitzchak Scott-Thoennes <sthoenna AT efn DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: /proc/<pid>/exe points to void
Message-ID: <20060130082913.GA3528@efn.org>
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On Tue, Jan 24, 2006 at 06:45:28PM +0100, Corinna Vinschen wrote:
> On Jan 20 13:50, Sam Steingold wrote:
> > >> > On Mar 10 16:00, Sam Steingold wrote:
> > >> >> /proc/<pid>/exe points to "foo", not to "foo.exe", so it cannot be
> > >> >> opened &c.
> > >> >         ^^^^
> > >> > 	????
> > >> 
> > >> how do I find out which file is running if /proc/<pid>/exe cannot be
> > >> opened?
> > >
> > > access(2) or stat(2)
> > 
> > http://www.opengroup.org/onlinepubs/009695399/functions/access.html
> > the above spec of access appears to indicate that if access() succeeds
> > then open() must succeed too.
> > this is not the case in cygwin: /proc/self/exe cannot be open()ed.
> 
> I've just checked in a patch which tacks on the .exe suffix to
> /proc/$PID/exe, as well as a patch to realpath which returns the
> pathname with .exe suffix, even if the original name has no suffix
> given.  We will give this a try.  Please test the next snapshot.

Mostly for the archives, I note that this makes perl's $^X variable
include the ".exe" suffix.  This is probably a good thing, but at the
moment triggers a test failure.

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