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Date: Mon, 17 Aug 2015 12:20:08 +0200
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Subject: Re: Cygwin version detection at run time
From: =?UTF-8?Q?V=C3=A1clav_Haisman?= <vhaisman AT gmail DOT com>
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On 14 August 2015 at 17:44, Corinna Vinschen wrote:
> On Aug 14 17:08, Václav Haisman wrote:
>> On 14 August 2015 at 16:11, Eliot Moss wrote:
>> > On 8/14/2015 9:56 AM, Václav 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 ...
>>
>> 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.

Thanks. Uname call's utsname structure is much easier to parse.

-- 
VH

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