From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- basic_cmds/mesg/mesg.1 | 112 +++++++++++++++++++++++++++++++++++++++++++++++ basic_cmds/mesg/mesg.c | 116 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 228 insertions(+) create mode 100644 basic_cmds/mesg/mesg.1 create mode 100644 basic_cmds/mesg/mesg.c (limited to 'basic_cmds/mesg') diff --git a/basic_cmds/mesg/mesg.1 b/basic_cmds/mesg/mesg.1 new file mode 100644 index 0000000..de2f7a4 --- /dev/null +++ b/basic_cmds/mesg/mesg.1 @@ -0,0 +1,112 @@ +.\" Copyright (c) 1987, 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" 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. +.\" +.\" @(#)mesg.1 8.1 (Berkeley) 6/6/93 +.\" $FreeBSD: src/usr.bin/mesg/mesg.1,v 1.10 2002/07/25 05:16:49 tjr Exp $ +.\" +.Dd May 5, 2002 +.Dt MESG 1 +.Os +.Sh NAME +.Nm mesg +.Nd display (do not display) messages from other users +.Sh SYNOPSIS +.Nm +.Op Cm n | Cm y +.Sh DESCRIPTION +The +.Nm +utility is invoked by a user to control write access others +have to a terminal device. +Write access is allowed by default, and programs such as +.Xr talk 1 +and +.Xr write 1 +may display messages on the terminal. +.Pp +The first terminal device in the sequence of devices associated with standard +input, standard output and standard error is affected. +.Pp +Options available: +.Bl -tag -width flag +.It Cm n +Disallows messages. +.It Cm y +Permits messages to be displayed. +.El +.Pp +If no arguments are given, +.Nm +displays the present message status to the standard output. +.Sh EXAMPLES +Disallow messages from other users to the current terminal: +.Pp +.Dl "mesg n" +.Pp +Allow messages from other users to +.Pa ttyp1 +(assuming you are also logged in on that terminal): +.Pp +.Dl "mesg y 1" +An error has occurred. +.El +.Sh COMPATIBILITY +Previous versions of the +.Nm +utility wrote the message status to the standard error output and +affected the terminal attached to standard error without first trying the +standard input or output devices. +.Sh SEE ALSO +.Xr biff 1 , +.Xr talk 1 , +.Xr wall 1 , +.Xr write 1 +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.1-2001 . +.Sh HISTORY +A +.Nm +command appeared in +.At v1 . diff --git a/basic_cmds/mesg/mesg.c b/basic_cmds/mesg/mesg.c new file mode 100644 index 0000000..b66980b --- /dev/null +++ b/basic_cmds/mesg/mesg.c @@ -0,0 +1,116 @@ +/* + * 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 const 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 +#endif /* not lint */ +#include +__RCSID("$FreeBSD: src/usr.bin/mesg/mesg.c,v 1.8 2002/09/04 23:29:04 dwmalone Exp $"); + +#include +#include + +#include +#include +#include +#include +#include + +static void usage(void); + +int +main(int argc, char *argv[]) +{ + struct stat sb; + char *tty; + int ch; + + while ((ch = getopt(argc, argv, "")) != -1) + switch (ch) { + case '?': + default: + usage(); + } +// argc -= optind; + argv += optind; + + if ((tty = ttyname(STDIN_FILENO)) == NULL && + (tty = ttyname(STDOUT_FILENO)) == NULL && + (tty = ttyname(STDERR_FILENO)) == NULL) + err(2, "ttyname"); + if (stat(tty, &sb) < 0) + err(2, "%s", tty); + + if (*argv == NULL) { + if (sb.st_mode & S_IWGRP) { + (void)puts("is y"); + exit(0); + } + (void)puts("is n"); + exit(1); + } + + switch (*argv[0]) { + case 'y': + if (chmod(tty, sb.st_mode | S_IWGRP) < 0) + err(2, "%s", tty); + exit(0); + case 'n': + if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) + err(2, "%s", tty); + exit(1); + } + + usage(); + return(0); +} + +static void +usage(void) +{ + (void)fprintf(stderr, "usage: mesg [y | n]\n"); + exit(2); +} -- cgit v1.2.3-56-ge451