/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License, Version 1.0 only

 * (the "License").  You may not use this file except in compliance

 * with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*	Copyright (c) 1988 AT&T	*/

/*	  All Rights Reserved  	*/

/*

 * Return the number of the slot in the utmp file

 * corresponding to the current user: try for file 0, 1, 2.

 * Returns -1 if slot not found.

 */

#pragma weak ttyslot = _ttyslot

#include "synonyms.h"

#include <string.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <utmpx.h>

#include <stdlib.h>

#ifndef TRUE

#define	TRUE 1

#define	FALSE 0

#endif

int

ttyslot(void)

{

	struct futmpx ubuf;

	char *tp, *p;

	int s;

	int ret = -1, console = FALSE;

	char ttynm[128];

	FILE	*fp;

	if ((tp = ttyname_r(0, ttynm, 128)) == NULL &&

	    (tp = ttyname_r(1, ttynm, 128)) == NULL &&

	    (tp = ttyname_r(2, ttynm, 128)) == NULL)

		return (-1);

	p = tp;

	if (strncmp(tp, "/dev/", 5) == 0)

		p += 5;

	if (strcmp(p, "console") == 0)

		console = TRUE;

	s = 0;

	if ((fp = fopen(UTMPX_FILE, "r")) == NULL)

		return (-1);

	while ((fread(&ubuf, sizeof (ubuf), 1, fp)) == 1) {

		if ((ubuf.ut_type == INIT_PROCESS ||

		    ubuf.ut_type == LOGIN_PROCESS ||

		    ubuf.ut_type == USER_PROCESS) &&

		    strncmp(p, ubuf.ut_line, sizeof (ubuf.ut_line)) == 0) {

			ret = s;

			if (!console || strncmp(ubuf.ut_host, ":0", 2) == 0)

				break;

		}

		s++;

	}

	(void) fclose(fp);

	return (ret);

}