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Date: Mon, 11 Feb 2019 18:32:12 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: Jeffrey Walton <noloader AT gmail DOT com>
Cc: cygwin AT cygwin DOT com
Subject: Re: Is Cygwin supposed to know _get_pgmptr?
Message-ID: <20190211173212.GF3718@calimero.vinschen.de>
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Mail-Followup-To: Jeffrey Walton <noloader AT gmail DOT com>, cygwin AT cygwin DOT com
References: <CAH8yC8ntX=ceRWXAHo_pw2zjzy9-kUWdMEL98vUCGoyBy5vNGQ AT mail DOT gmail DOT com>
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On Feb 11 12:08, Jeffrey Walton wrote:
> Hi Everyone,
>=20
> I have some code that looks like so:
>=20
> #if defined(_WINDOWS)
>     char* pgmptr =3D NULLPTR;
>     errno_t err =3D _get_pgmptr(&pgmptr);
>     if (err =3D=3D 0 && pgmptr !=3D NULLPTR)
>         exePath =3D pgmptr;
> #endif
>=20
> The code gets the full path of the executable. It sidsteps some
> problems with finding the full path of an executable. Posix realpath
> is a little messier and has some inherent problem with path lengths.
>=20
> The code fails to compile with Cygwin.
>=20
> I am wondering if the failure is expected.

Yes.  This is a Windowism which is not supported.

Use http://man7.org/linux/man-pages/man3/program_invocation_name.3.html
instead.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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