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ttyslot.c revision 1.1
      1  1.1  cgd /*
      2  1.1  cgd  * Copyright (c) 1988 The Regents of the University of California.
      3  1.1  cgd  * All rights reserved.
      4  1.1  cgd  *
      5  1.1  cgd  * Redistribution and use in source and binary forms, with or without
      6  1.1  cgd  * modification, are permitted provided that the following conditions
      7  1.1  cgd  * are met:
      8  1.1  cgd  * 1. Redistributions of source code must retain the above copyright
      9  1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     10  1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     12  1.1  cgd  *    documentation and/or other materials provided with the distribution.
     13  1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     14  1.1  cgd  *    must display the following acknowledgement:
     15  1.1  cgd  *	This product includes software developed by the University of
     16  1.1  cgd  *	California, Berkeley and its contributors.
     17  1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
     18  1.1  cgd  *    may be used to endorse or promote products derived from this software
     19  1.1  cgd  *    without specific prior written permission.
     20  1.1  cgd  *
     21  1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  1.1  cgd  * SUCH DAMAGE.
     32  1.1  cgd  */
     33  1.1  cgd 
     34  1.1  cgd #if defined(LIBC_SCCS) && !defined(lint)
     35  1.1  cgd static char sccsid[] = "@(#)ttyslot.c	5.6 (Berkeley) 2/23/91";
     36  1.1  cgd #endif /* LIBC_SCCS and not lint */
     37  1.1  cgd 
     38  1.1  cgd #include <ttyent.h>
     39  1.1  cgd #include <stdio.h>
     40  1.1  cgd #include <string.h>
     41  1.1  cgd #include <unistd.h>
     42  1.1  cgd 
     43  1.1  cgd int
     44  1.1  cgd ttyslot()
     45  1.1  cgd {
     46  1.1  cgd 	register struct ttyent *ttyp;
     47  1.1  cgd 	register int slot;
     48  1.1  cgd 	register char *p;
     49  1.1  cgd 	int cnt;
     50  1.1  cgd 	char *name;
     51  1.1  cgd 
     52  1.1  cgd 	setttyent();
     53  1.1  cgd 	for (cnt = 0; cnt < 3; ++cnt)
     54  1.1  cgd 		if (name = ttyname(cnt)) {
     55  1.1  cgd 			if (p = rindex(name, '/'))
     56  1.1  cgd 				++p;
     57  1.1  cgd 			else
     58  1.1  cgd 				p = name;
     59  1.1  cgd 			for (slot = 1; ttyp = getttyent(); ++slot)
     60  1.1  cgd 				if (!strcmp(ttyp->ty_name, p)) {
     61  1.1  cgd 					endttyent();
     62  1.1  cgd 					return(slot);
     63  1.1  cgd 				}
     64  1.1  cgd 			break;
     65  1.1  cgd 		}
     66  1.1  cgd 	endttyent();
     67  1.1  cgd 	return(0);
     68  1.1  cgd }
     69