ttyname_r.c
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ttyname_r.c
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	/* ttyname_r.c - A ttyname_r() replacement.
	Copyright (C) 2003, 2004 g10 Code GmbH

	This file is part of GPGME.

	GPGME is free software; you can redistribute it and/or modify it
	under the terms of the GNU Lesser General Public License as
	published by the Free Software Foundation; either version 2.1 of
	the License, or (at your option) any later version.

	GPGME is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	02111-1307, USA. */

	#if HAVE_CONFIG_H
	#include <config.h>
	#endif
	#include <stdlib.h>
	#include <errno.h>
	#include <string.h>
	#include <unistd.h>


	#warning ttyname is not thread-safe, and ttyname_r is missing

	int
	ttyname_r (int fd, char *buf, size_t buflen)
	{
	#if HAVE_W32_SYSTEM
	errno = ENOTTY; /* The best error code I have under mingw. */
	#else
	char *tty;

	tty = ttyname (fd);
	if (!tty)
	return errno;

	strncpy (buf, tty, buflen);
	buf[buflen - 1] = '\0';
	return (strlen (tty) >= buflen) ? ERANGE : 0;
	#endif
	}