usr.bin/talk/msgs.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)msgs.c   8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/usr.bin/talk/msgs.c,v 1.5 1999/08/28 01:06:14 peter Exp $
  31  */
  32
  33 /*
  34  * A package to display what is happening every MSG_INTERVAL seconds
  35  * if we are slow connecting.
  36  */
  37
  38 #include <signal.h>
  39 #include "talk.h"
  40
  41 #define MSG_INTERVAL 4
  42
  43 const char      *current_state;
  44 int     current_line = 0;
  45
  46 /* ARGSUSED */
  47 void
  48 disp_msg(int signo __unused)
  49 {
  50         message(current_state);
  51 }
  52
  53 void
  54 start_msgs(void)
  55 {
  56         struct itimerval itimer;
  57
  58         message(current_state);
  59         signal(SIGALRM, disp_msg);
  60         itimer.it_value.tv_sec = itimer.it_interval.tv_sec = MSG_INTERVAL;
  61         itimer.it_value.tv_usec = itimer.it_interval.tv_usec = 0;
  62         setitimer(ITIMER_REAL, &itimer, NULL);
  63 }
  64
  65 void
  66 end_msgs(void)
  67 {
  68         struct itimerval itimer;
  69
  70         timerclear(&itimer.it_value);
  71         timerclear(&itimer.it_interval);
  72         setitimer(ITIMER_REAL, &itimer, NULL);
  73         signal(SIGALRM, SIG_DFL);
  74 }