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Date:	Fri, 14 Aug 2015 17:44:08 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Cygwin version detection at run time
Message-ID:	<20150814154408.GJ28349@calimero.vinschen.de>
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On Aug 14 17:08, V=C3=A1clav Haisman wrote:
> On 14 August 2015 at 16:11, Eliot Moss <moss AT cs DOT umass DOT edu> wrote:
> > On 8/14/2015 9:56 AM, V=C3=A1clav Haisman wrote:
> >>
> >> Hi.
> >>
> >> I am trying to find out Cygwin version at run time.
> >>
> >> I have noticed that there is `cygwin_internal (CW_GETVERSIONINFO)` API
> >> for this. However, it seems that the `cygwin_version_info` structure
> >> this call is supposed to fill in is not publicly available and is only
> >> declared internally in `winsup/cygwin/cygwin_version.h`.
> >>
> >> Am I right that my only option is either to copy the internal
> >> declaration of the structure or to use `/proc/version` and parse the
> >> version string out of that?
> >
> >
> > There's uname, whose options allow getting various parts of what
> > /proc/version gives you.  uname is also somewhat portable across
> > different flavors of linux ...
>=20
> Never mind, I have figured it out. The  `cygwin_internal
> (CW_GETVERSIONINFO)`  actually returns a pointer to string which can
> be parsed reliably. I have used it.

cygwin_internal(CW_GETVERSIONINFO) is an API for non-Cygwin tools like
cygcheck, not for general consumption.  For a Cygwin executable, better
use uname(2) instead.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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