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  * 4. 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
  30 #include <sys/cdefs.h>
  31
  32 __FBSDID("$FreeBSD$");
  33
  34 #ifndef lint
  35 static const char sccsid[] = "@(#)msgs.c        8.1 (Berkeley) 6/6/93";
  36 #endif
  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
  45 #include "talk.h"
  46
  47 #define MSG_INTERVAL 4
  48
  49 const char      *current_state;
  50 int     current_line = 0;
  51
  52 /* ARGSUSED */
  53 void
  54 disp_msg(int signo __unused)
  55 {
  56         message(current_state);
  57 }
  58
  59 void
  60 start_msgs(void)
  61 {
  62         struct itimerval itimer;
  63
  64         message(current_state);
  65         signal(SIGALRM, disp_msg);
  66         itimer.it_value.tv_sec = itimer.it_interval.tv_sec = MSG_INTERVAL;
  67         itimer.it_value.tv_usec = itimer.it_interval.tv_usec = 0;
  68         setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
  69 }
  70
  71 void
  72 end_msgs(void)
  73 {
  74         struct itimerval itimer;
  75
  76         timerclear(&itimer.it_value);
  77         timerclear(&itimer.it_interval);
  78         setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
  79         signal(SIGALRM, SIG_DFL);
  80 }