rwall from FreeBSD 1.1.5.1
Reviewed by: Geoff Submitted by: Christopher G. Demetriou
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csgr
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9
usr.bin/rwall/Makefile
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9
usr.bin/rwall/Makefile
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# $Id: Makefile,v 1.2 1993/11/10 03:47:37 smace Exp $
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PROG = rwall
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MAN1 = rwall.1
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DPADD= ${LIBRPCSVC}
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LDADD= -lrpcsvc
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.include <bsd.prog.mk>
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79
usr.bin/rwall/rwall.1
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79
usr.bin/rwall/rwall.1
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.\" Copyright (c) 1983, 1990 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)rwall.1 6.7 (Berkeley) 4/23/91
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.\" $Id: rwall.1,v 1.1 1993/09/16 01:11:03 jtc Exp $
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.\"
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.Dd April 23, 1991
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.Dt RWALL 1
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.Os BSD 4.2
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.Sh NAME
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.Nm rwall
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.Nd send a message to users logged on a host
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.Sh SYNOPSIS
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.Nm rwall
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.Ar host
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.Op Ar file
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.Sh DESCRIPTION
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The
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.Nm rwall
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command sends a message to the users logged into the specified host. The
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message to be sent can be typed in and terminated with EOF or it can
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be in a
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.Ar file .
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.Sh DIAGNOSTICS
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.Bl -tag -width indent
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.It rwall: RPC: Program not registered
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The
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.Xr rpc.rwalld 8
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daemon has not been started on the remote host.
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.It rwall: RPC: Timed out
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A communication error occurred. Either the network is
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excessively congested, or the
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.Xr rpc.rwalld 8
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daemon has terminated on the remote host.
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.It rwall: RPC: Port mapper failure - RPC: Timed out
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The remote host is not running the portmapper (see
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.Xr portmap 8 ),
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and cannot accomodate any RPC-based services. The host may be down.
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.El
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.Sh SEE ALSO
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.Xr portmap 8 ,
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.Xr who 1 ,
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.Xr rpc.rwalld 8
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.Sh HISTORY
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The
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.Nm rwall
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command
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appeared in
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.Em Sun-OS .
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.Sh BUGS
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The sorting options are not implemented.
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174
usr.bin/rwall/rwall.c
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174
usr.bin/rwall/rwall.c
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/*
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* Copyright (c) 1993 Christopher G. Demetriou
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* Copyright (c) 1988, 1990 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1988 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)wall.c 5.14 (Berkeley) 3/2/91";*/
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static char rcsid[] = "$Id: rwall.c,v 1.1 1993/09/16 01:11:04 jtc Exp $";
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#endif /* not lint */
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/*
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* This program is not related to David Wall, whose Stanford Ph.D. thesis
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* is entitled "Mechanisms for Broadcast and Selective Broadcast".
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <utmp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <paths.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/rwall.h>
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int mbufsize;
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char *mbuf;
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/* ARGSUSED */
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main(argc, argv)
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int argc;
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char **argv;
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{
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char *wallhost, res;
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CLIENT *cl;
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if ((argc < 2) || (argc > 3)) {
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fprintf(stderr, "usage: %s hostname [file]\n", argv[0]);
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exit(1);
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}
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wallhost = argv[1];
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makemsg(argv[2]);
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/*
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* Create client "handle" used for calling MESSAGEPROG on the
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* server designated on the command line. We tell the rpc package
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* to use the "tcp" protocol when contacting the server.
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*/
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cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp");
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if (cl == NULL) {
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/*
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* Couldn't establish connection with server.
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* Print error message and die.
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*/
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clnt_pcreateerror(wallhost);
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exit(1);
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}
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if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, NULL) != RPC_SUCCESS) {
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/*
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* An error occurred while calling the server.
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* Print error message and die.
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*/
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clnt_perror(cl, wallhost);
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exit(1);
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}
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exit(0);
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}
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makemsg(fname)
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char *fname;
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{
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register int ch, cnt;
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struct tm *lt;
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struct passwd *pw;
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struct stat sbuf;
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time_t now, time();
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FILE *fp;
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int fd;
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char *p, *whom, hostname[MAXHOSTNAMELEN], lbuf[100], tmpname[15];
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char *getlogin(), *strcpy(), *ttyname();
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(void)strcpy(tmpname, _PATH_TMP);
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(void)strcat(tmpname, "/wall.XXXXXX");
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if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+"))) {
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(void)fprintf(stderr, "wall: can't open temporary file.\n");
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exit(1);
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}
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(void)unlink(tmpname);
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if (!(whom = getlogin()))
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whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
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(void)gethostname(hostname, sizeof(hostname));
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(void)time(&now);
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lt = localtime(&now);
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/*
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* all this stuff is to blank out a square for the message;
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* we wrap message lines at column 79, not 80, because some
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* terminals wrap after 79, some do not, and we can't tell.
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* Which means that we may leave a non-blank character
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* in column 80, but that can't be helped.
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*/
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(void)fprintf(fp, "Remote Broadcast Message from %s@%s\n",
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whom, hostname);
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(void)fprintf(fp, " (%s) at %d:%02d ...\n", ttyname(2),
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lt->tm_hour, lt->tm_min);
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putc('\n', fp);
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if (fname && !(freopen(fname, "r", stdin))) {
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(void)fprintf(stderr, "wall: can't read %s.\n", fname);
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exit(1);
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}
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while (fgets(lbuf, sizeof(lbuf), stdin))
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fputs(lbuf, fp);
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rewind(fp);
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if (fstat(fd, &sbuf)) {
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(void)fprintf(stderr, "wall: can't stat temporary file.\n");
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exit(1);
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}
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mbufsize = sbuf.st_size;
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if (!(mbuf = malloc((u_int)mbufsize))) {
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(void)fprintf(stderr, "wall: out of memory.\n");
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exit(1);
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}
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if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize) {
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(void)fprintf(stderr, "wall: can't read temporary file.\n");
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exit(1);
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}
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(void)close(fd);
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}
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