xref: /freebsd/usr.bin/biff/biff.c (revision adf721d1cb2c49e20e79d43e8d1339d8348661df)
19b50d902SRodney W. Grimes /*
29b50d902SRodney W. Grimes  * Copyright (c) 1980, 1993
39b50d902SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
49b50d902SRodney W. Grimes  *
59b50d902SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
69b50d902SRodney W. Grimes  * modification, are permitted provided that the following conditions
79b50d902SRodney W. Grimes  * are met:
89b50d902SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
99b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
109b50d902SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
119b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
129b50d902SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
139b50d902SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
149b50d902SRodney W. Grimes  *    must display the following acknowledgement:
159b50d902SRodney W. Grimes  *	This product includes software developed by the University of
169b50d902SRodney W. Grimes  *	California, Berkeley and its contributors.
179b50d902SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
189b50d902SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
199b50d902SRodney W. Grimes  *    without specific prior written permission.
209b50d902SRodney W. Grimes  *
219b50d902SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
229b50d902SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
239b50d902SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
249b50d902SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
259b50d902SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
269b50d902SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
279b50d902SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
289b50d902SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
299b50d902SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
309b50d902SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
319b50d902SRodney W. Grimes  * SUCH DAMAGE.
329b50d902SRodney W. Grimes  */
339b50d902SRodney W. Grimes 
349b50d902SRodney W. Grimes #ifndef lint
35fa146c53SArchie Cobbs static const char copyright[] =
369b50d902SRodney W. Grimes "@(#) Copyright (c) 1980, 1993\n\
379b50d902SRodney W. Grimes 	The Regents of the University of California.  All rights reserved.\n";
38151aa6c3SMark Murray #endif
399b50d902SRodney W. Grimes 
409f5b04e9SDavid Malone #if 0
419b50d902SRodney W. Grimes #ifndef lint
429f5b04e9SDavid Malone static char sccsid[] = "@(#)biff.c	8.1 (Berkeley) 6/6/93";
43151aa6c3SMark Murray #endif
449f5b04e9SDavid Malone #endif
459f5b04e9SDavid Malone 
469f5b04e9SDavid Malone #include <sys/cdefs.h>
479f5b04e9SDavid Malone __FBSDID("$FreeBSD$");
489b50d902SRodney W. Grimes 
499b50d902SRodney W. Grimes #include <sys/stat.h>
501a7fa91eSMike Barcroft 
510676cb89SPhilippe Charnier #include <err.h>
52b0a2f60dSPhilippe Charnier #include <stdio.h>
531a7fa91eSMike Barcroft #include <stdlib.h>
54b0a2f60dSPhilippe Charnier #include <unistd.h>
559b50d902SRodney W. Grimes 
56f1bb2cd2SWarner Losh static void usage(void);
579b50d902SRodney W. Grimes 
58d7d10053SAlexander Langer int
599b50d902SRodney W. Grimes main(argc, argv)
609b50d902SRodney W. Grimes 	int argc;
619b50d902SRodney W. Grimes 	char *argv[];
629b50d902SRodney W. Grimes {
639b50d902SRodney W. Grimes 	struct stat sb;
649b50d902SRodney W. Grimes 	int ch;
659b50d902SRodney W. Grimes 	char *name;
669b50d902SRodney W. Grimes 
679b50d902SRodney W. Grimes 
681c8af878SWarner Losh 	while ((ch = getopt(argc, argv, "")) != -1)
699b50d902SRodney W. Grimes 		switch(ch) {
709b50d902SRodney W. Grimes 		case '?':
719b50d902SRodney W. Grimes 		default:
729b50d902SRodney W. Grimes 			usage();
739b50d902SRodney W. Grimes 		}
749b50d902SRodney W. Grimes 	argc -= optind;
759b50d902SRodney W. Grimes 	argv += optind;
769b50d902SRodney W. Grimes 
77adf721d1SRobert Drehmel 	if ((name = ttyname(STDIN_FILENO)) == NULL &&
78adf721d1SRobert Drehmel 	    (name = ttyname(STDOUT_FILENO)) == NULL &&
79adf721d1SRobert Drehmel 	    (name = ttyname(STDERR_FILENO)) == NULL)
800676cb89SPhilippe Charnier 		err(2, "unknown tty");
819b50d902SRodney W. Grimes 
829b50d902SRodney W. Grimes 	if (stat(name, &sb))
830676cb89SPhilippe Charnier 		err(2, "stat");
849b50d902SRodney W. Grimes 
859b50d902SRodney W. Grimes 	if (*argv == NULL) {
86da2dc5ccSJohan Karlsson 		(void)printf("is %s\n",
877da9dccbSJohan Karlsson 		    sb.st_mode & S_IXUSR ? "y" :
887da9dccbSJohan Karlsson 		    sb.st_mode & S_IXGRP ? "b" : "n");
897da9dccbSJohan Karlsson 		return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1);
907da9dccbSJohan Karlsson 
919b50d902SRodney W. Grimes 	}
929b50d902SRodney W. Grimes 
939b50d902SRodney W. Grimes 	switch(argv[0][0]) {
949b50d902SRodney W. Grimes 	case 'n':
957da9dccbSJohan Karlsson 		if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0)
96cf6e06f2SKris Kennaway 			err(2, "%s", name);
979b50d902SRodney W. Grimes 		break;
989b50d902SRodney W. Grimes 	case 'y':
997da9dccbSJohan Karlsson 		if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) < 0)
1007da9dccbSJohan Karlsson 			err(2, "%s", name);
1017da9dccbSJohan Karlsson 		break;
1027da9dccbSJohan Karlsson 	case 'b':
1037da9dccbSJohan Karlsson 		if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) < 0)
104cf6e06f2SKris Kennaway 			err(2, "%s", name);
1059b50d902SRodney W. Grimes 		break;
1069b50d902SRodney W. Grimes 	default:
1079b50d902SRodney W. Grimes 		usage();
1089b50d902SRodney W. Grimes 	}
1097da9dccbSJohan Karlsson 	return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1);
1109b50d902SRodney W. Grimes }
1119b50d902SRodney W. Grimes 
1129b50d902SRodney W. Grimes static void
1139b50d902SRodney W. Grimes usage()
1149b50d902SRodney W. Grimes {
1157da9dccbSJohan Karlsson 	(void)fprintf(stderr, "usage: biff [n | y | b]\n");
1169b50d902SRodney W. Grimes 	exit(2);
1179b50d902SRodney W. Grimes }
118