biff.c revision 1.1 
11.1Scgd/*
21.1Scgd * Copyright (c) 1980 The Regents of the University of California.
31.1Scgd * All rights reserved.
41.1Scgd *
51.1Scgd * Redistribution and use in source and binary forms, with or without
61.1Scgd * modification, are permitted provided that the following conditions
71.1Scgd * are met:
81.1Scgd * 1. Redistributions of source code must retain the above copyright
91.1Scgd *    notice, this list of conditions and the following disclaimer.
101.1Scgd * 2. Redistributions in binary form must reproduce the above copyright
111.1Scgd *    notice, this list of conditions and the following disclaimer in the
121.1Scgd *    documentation and/or other materials provided with the distribution.
131.1Scgd * 3. All advertising materials mentioning features or use of this software
141.1Scgd *    must display the following acknowledgement:
151.1Scgd *	This product includes software developed by the University of
161.1Scgd *	California, Berkeley and its contributors.
171.1Scgd * 4. Neither the name of the University nor the names of its contributors
181.1Scgd *    may be used to endorse or promote products derived from this software
191.1Scgd *    without specific prior written permission.
201.1Scgd *
211.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
221.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
231.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
241.1Scgd * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
251.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
261.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
271.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
281.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
291.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
301.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
311.1Scgd * SUCH DAMAGE.
321.1Scgd */
331.1Scgd
341.1Scgd#ifndef lint
351.1Scgdchar copyright[] =
361.1Scgd"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
371.1Scgd All rights reserved.\n";
381.1Scgd#endif /* not lint */
391.1Scgd
401.1Scgd#ifndef lint
411.1Scgdstatic char sccsid[] = "@(#)biff.c	5.3 (Berkeley) 6/1/90";
421.1Scgd#endif /* not lint */
431.1Scgd
441.1Scgd/*
451.1Scgd * biff
461.1Scgd */
471.1Scgd#include <sys/types.h>
481.1Scgd#include <sys/stat.h>
491.1Scgd#include <stdio.h>
501.1Scgd
511.1Scgdchar	*ttyname();
521.1Scgd
531.1Scgdmain(argc, argv)
541.1Scgd	int argc;
551.1Scgd	char **argv;
561.1Scgd{
571.1Scgd	char *cp = ttyname(2);
581.1Scgd	struct stat stb;
591.1Scgd
601.1Scgd	argc--, argv++;
611.1Scgd	if (cp == 0)
621.1Scgd		fprintf(stderr, "Where are you?\n"), exit(1);
631.1Scgd	if (stat(cp, &stb) < 0)
641.1Scgd		perror(cp), exit(1);
651.1Scgd	if (argc == 0) {
661.1Scgd		printf("is %s\n", stb.st_mode&0100 ? "y" : "n");
671.1Scgd		exit((stb.st_mode&0100) ? 0 : 1);
681.1Scgd	}
691.1Scgd	switch (argv[0][0]) {
701.1Scgd
711.1Scgd	case 'y':
721.1Scgd		if (chmod(cp, stb.st_mode|0100) < 0)
731.1Scgd			perror(cp);
741.1Scgd		break;
751.1Scgd
761.1Scgd	case 'n':
771.1Scgd		if (chmod(cp, stb.st_mode&~0100) < 0)
781.1Scgd			perror(cp);
791.1Scgd		break;
801.1Scgd
811.1Scgd	default:
821.1Scgd		fprintf(stderr, "usage: biff [y] [n]\n");
831.1Scgd	}
841.1Scgd	exit((stb.st_mode&0100) ? 0 : 1);
851.1Scgd}
86