185 lines
5.2 KiB
C
185 lines
5.2 KiB
C
/*
|
|
* Copyright (c) 1993 Christopher G. Demetriou
|
|
* Copyright (c) 1988, 1990 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char copyright[] =
|
|
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "from: @(#)wall.c 5.14 (Berkeley) 3/2/91";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* This program is not related to David Wall, whose Stanford Ph.D. thesis
|
|
* is entitled "Mechanisms for Broadcast and Selective Broadcast".
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/uio.h>
|
|
#include <err.h>
|
|
#include <paths.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <utmp.h>
|
|
|
|
#include <rpc/rpc.h>
|
|
#include <rpcsvc/rwall.h>
|
|
|
|
int mbufsize;
|
|
char *mbuf;
|
|
|
|
void makemsg __P((char *));
|
|
static void usage __P((void));
|
|
char *ttymsg __P((struct iovec *, int, char *, int));
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
char *wallhost, res;
|
|
CLIENT *cl;
|
|
struct timeval tv;
|
|
|
|
if ((argc < 2) || (argc > 3))
|
|
usage();
|
|
|
|
wallhost = argv[1];
|
|
|
|
makemsg(argv[2]);
|
|
|
|
/*
|
|
* Create client "handle" used for calling MESSAGEPROG on the
|
|
* server designated on the command line. We tell the rpc package
|
|
* to use the "tcp" protocol when contacting the server.
|
|
*/
|
|
cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp");
|
|
if (cl == NULL) {
|
|
/*
|
|
* Couldn't establish connection with server.
|
|
* Print error message and die.
|
|
*/
|
|
errx(1, "%s", clnt_spcreateerror(wallhost));
|
|
}
|
|
|
|
tv.tv_sec = 15; /* XXX ?? */
|
|
tv.tv_usec = 0;
|
|
if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, tv) != RPC_SUCCESS) {
|
|
/*
|
|
* An error occurred while calling the server.
|
|
* Print error message and die.
|
|
*/
|
|
errx(1, "%s", clnt_sperror(cl, wallhost));
|
|
}
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: rwall hostname [file]\n");
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
makemsg(fname)
|
|
char *fname;
|
|
{
|
|
struct tm *lt;
|
|
struct passwd *pw;
|
|
struct stat sbuf;
|
|
time_t now;
|
|
FILE *fp;
|
|
int fd;
|
|
char *tty, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
|
|
const char *whom;
|
|
|
|
(void)snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
|
|
if ((fd = mkstemp(tmpname)) == -1 || !(fp = fdopen(fd, "r+")))
|
|
err(1, "can't open temporary file");
|
|
(void)unlink(tmpname);
|
|
|
|
if (!(whom = getlogin()))
|
|
whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
|
|
(void)gethostname(hostname, sizeof(hostname));
|
|
(void)time(&now);
|
|
lt = localtime(&now);
|
|
|
|
/*
|
|
* all this stuff is to blank out a square for the message;
|
|
* we wrap message lines at column 79, not 80, because some
|
|
* terminals wrap after 79, some do not, and we can't tell.
|
|
* Which means that we may leave a non-blank character
|
|
* in column 80, but that can't be helped.
|
|
*/
|
|
(void)fprintf(fp, "Remote Broadcast Message from %s@%s\n",
|
|
whom, hostname);
|
|
tty = ttyname(STDERR_FILENO);
|
|
if (tty == NULL)
|
|
tty = "no tty";
|
|
(void)fprintf(fp, " (%s) at %d:%02d ...\n", tty,
|
|
lt->tm_hour, lt->tm_min);
|
|
|
|
putc('\n', fp);
|
|
|
|
if (fname && !(freopen(fname, "r", stdin)))
|
|
err(1, "can't read %s", fname);
|
|
while (fgets(lbuf, sizeof(lbuf), stdin))
|
|
fputs(lbuf, fp);
|
|
rewind(fp);
|
|
|
|
if (fstat(fd, &sbuf))
|
|
err(1, "can't stat temporary file");
|
|
mbufsize = sbuf.st_size;
|
|
if (!(mbuf = malloc((u_int)mbufsize)))
|
|
err(1, "out of memory");
|
|
if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
|
|
err(1, "can't read temporary file");
|
|
(void)close(fd);
|
|
}
|