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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)msgs.c   8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/talk/msgs.c,v 1.5 1999/08/28 01:06:14 peter Exp $
  35  * $DragonFly: src/usr.bin/talk/msgs.c,v 1.3 2003/10/04 20:36:52 hmp Exp $
  36  */
  37
  38 /*
  39  * A package to display what is happening every MSG_INTERVAL seconds
  40  * if we are slow connecting.
  41  */
  42
  43 #include <signal.h>
  44 #include "talk.h"
  45
  46 #define MSG_INTERVAL 4
  47
  48 char    *current_state;
  49 int     current_line = 0;
  50
  51 /* ARGSUSED */
  52 void
  53 disp_msg(int signo)
  54 {
  55         message(current_state);
  56 }
  57
  58 void
  59 start_msgs(void)
  60 {
  61         struct itimerval itimer;
  62
  63         message(current_state);
  64         signal(SIGALRM, disp_msg);
  65         itimer.it_value.tv_sec = itimer.it_interval.tv_sec = MSG_INTERVAL;
  66         itimer.it_value.tv_usec = itimer.it_interval.tv_usec = 0;
  67         setitimer(ITIMER_REAL, &itimer, NULL);
  68 }
  69
  70 void
  71 end_msgs(void)
  72 {
  73         struct itimerval itimer;
  74
  75         timerclear(&itimer.it_value);
  76         timerclear(&itimer.it_interval);
  77         setitimer(ITIMER_REAL, &itimer, NULL);
  78         signal(SIGALRM, SIG_DFL);
  79 }