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ttyslot.c revision 1.11 
      1 /*	$NetBSD: ttyslot.c,v 1.11 2003/08/07 16:42:58 agc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 #if 0
     35 static char sccsid[] = "@(#)ttyslot.c	8.1 (Berkeley) 6/4/93";
     36 #else
     37 __RCSID("$NetBSD: ttyslot.c,v 1.11 2003/08/07 16:42:58 agc Exp $");
     38 #endif
     39 #endif /* LIBC_SCCS and not lint */
     40 
     41 #include "namespace.h"
     42 #include <ttyent.h>
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 #include <unistd.h>
     47 
     48 #ifdef __weak_alias
     49 __weak_alias(ttyslot,_ttyslot)
     50 #endif
     51 
     52 int
     53 ttyslot()
     54 {
     55 	struct ttyent *ttyp;
     56 	int slot;
     57 	char *p;
     58 	int cnt;
     59 	char *name;
     60 
     61 	setttyent();
     62 	for (cnt = 0; cnt < 3; ++cnt)
     63 		if ((name = ttyname(cnt)) != NULL) {
     64 			if ((p = strrchr(name, '/')) != NULL)
     65 				++p;
     66 			else
     67 				p = name;
     68 			for (slot = 1; (ttyp = getttyent()) != NULL; ++slot)
     69 				if (!strcmp(ttyp->ty_name, p)) {
     70 					endttyent();
     71 					return(slot);
     72 				}
     73 			break;
     74 		}
     75 	endttyent();
     76 	return(0);
     77 }
     78