/* $OpenBSD: mesg.c,v 1.2 1996/06/26 05:37:05 deraadt Exp $ */ /* $NetBSD: mesg.c,v 1.4 1994/12/23 07:16:32 jtc Exp $ */ /* * Copyright (c) 1987, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1987, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)mesg.c 8.2 (Berkeley) 1/21/94"; #endif static char rcsid[] = "$OpenBSD: mesg.c,v 1.2 1996/06/26 05:37:05 deraadt Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include int main(argc, argv) int argc; char *argv[]; { struct stat sb; char *tty; int ch; while ((ch = getopt(argc, argv, "")) != EOF) switch (ch) { case '?': default: goto usage; } argc -= optind; argv += optind; if ((tty = ttyname(STDERR_FILENO)) == NULL) err(1, "ttyname"); if (stat(tty, &sb) < 0) err(1, "%s", tty); if (*argv == NULL) { if (sb.st_mode & S_IWGRP) { (void)fprintf(stderr, "is y\n"); exit(0); } (void)fprintf(stderr, "is n\n"); exit(1); } switch (*argv[0]) { case 'y': if (chmod(tty, sb.st_mode | S_IWGRP) < 0) err(1, "%s", tty); exit(0); case 'n': if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) err(1, "%s", tty); exit(1); } usage: (void)fprintf(stderr, "usage: mesg [y | n]\n"); exit(2); }