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- /* rwall spoofing hack... should compile on most sunos 4.1.x, bsd-like, and
- * hpux OSes... have fun.
- *
- * note: works only on hosts which have rwalld in /etc/inetd.conf
- */
-
- /*
- * 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
- char copyright[] =
- "@(#) Copyright (c) 1988 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- /*static char sccsid[] = "from: @(#)wall.c 5.14 (Berkeley) 3/2/91";*/
- static char rcsid[] = "$Id: rwall.c,v 1.5 1993/12/10 19:24:39 jtc Exp $";
- #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 <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <pwd.h>
- #include <unistd.h>
- #ifdef sony_news
- #include <sys/time.h>
- #endif
- #include <rpc/rpc.h>
- #include <rpcsvc/rwall.h>
- #if (defined ultrix) || (defined hpux)
- #define mkstemp mktemp
- #endif
- #define _PATH_TMP "/usr/tmp"
- struct timeval timeout = { 25, 0 };
- int mbufsize;
- char *mbuf;
-
- void makemsg ();
-
- int
- main(argc, argv)
- int argc;
- char **argv;
- {
- char *wallhost, res;
- CLIENT *cl;
-
- if ((argc < 4) || (argc > 5)) {
- fprintf(stderr, "usage: %s hostname fakeuser fakehost [file]\n", argv[0]);
- exit(1);
- }
-
- wallhost = argv[1];
-
- makemsg(argv[4], argv[2], argv[3]);
-
- /*
- * 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.
- */
- clnt_pcreateerror(wallhost);
- exit(1);
- }
-
- if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, timeout) != RPC_SUCCESS) {
- /*
- * An error occurred while calling the server.
- * Print error message and die.
- */
- clnt_perror(cl, wallhost);
- exit(1);
- }
-
- exit(0);
- }
-
- void
- makemsg(fname,uname,hname)
- char *fname, *uname, *hname;
- {
- struct tm *lt;
- struct passwd *pw;
- struct stat sbuf;
- time_t now;
- FILE *fp;
- int fd;
- char *whom, *hostname, lbuf[100], tmpname[32];
-
- (void)strcpy(tmpname, _PATH_TMP);
- (void)strcat(tmpname, "/wall.XXXXXX");
- if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+"))) {
- (void)fprintf(stderr, "wall: can't open temporary file.\n");
- exit(1);
- }
- (void)unlink(tmpname);
- whom = uname;
- hostname = hname;
- (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);
- (void)fprintf(fp, " (%s) at %d:%02d ...\n", ttyname(2),
- lt->tm_hour, lt->tm_min);
-
- putc('\n', fp);
-
- if (fname && !(freopen(fname, "r", stdin))) {
- (void)fprintf(stderr, "wall: can't read %s.\n", fname);
- exit(1);
- }
- while (fgets(lbuf, sizeof(lbuf), stdin))
- fputs(lbuf, fp);
- rewind(fp);
-
- if (fstat(fd, &sbuf)) {
- (void)fprintf(stderr, "wall: can't stat temporary file.\n");
- exit(1);
- }
- mbufsize = sbuf.st_size;
- if (!(mbuf = malloc((u_int)mbufsize))) {
- (void)fprintf(stderr, "wall: out of memory.\n");
- exit(1);
- }
- if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize) {
- (void)fprintf(stderr, "wall: can't read temporary file.\n");
- exit(1);
- }
- (void)close(fd);
- }
-
-
-
-
-