usr.bin/talk/init_disp.c

   1 /*      $NetBSD: init_disp.c,v 1.10 2001/12/07 12:10:09 blymn Exp $     */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94";
  36 #endif
  37 __RCSID("$NetBSD: init_disp.c,v 1.10 2001/12/07 12:10:09 blymn Exp $");
  38 #endif /* not lint */
  39
  40 /*
  41  * Initialization code for the display package,
  42  * as well as the signal handling routines.
  43  */
  44
  45 #include "talk.h"
  46 #include <sys/ioctl.h>
  47 #include <sys/ioctl_compat.h>
  48 #include <err.h>
  49 #include <signal.h>
  50 #include <termios.h>
  51 #include <stdlib.h>
  52 #include <unistd.h>
  53
  54 /*
  55  * Set up curses, catch the appropriate signals,
  56  * and build the various windows.
  57  */
  58 void
  59 init_display()
  60 {
  61         struct sigaction sa;
  62
  63         if (initscr() == NULL)
  64                 errx(1, "Terminal type unset or lacking necessary features.");
  65         (void)sigaction(SIGTSTP, NULL, &sa);
  66         sigaddset(&sa.sa_mask, SIGALRM);
  67         (void)sigaction(SIGTSTP, &sa, NULL);
  68         curses_initialized = 1;
  69         clear();
  70         refresh();
  71         noecho();
  72         cbreak();
  73         signal(SIGINT, sig_sent);
  74         signal(SIGPIPE, sig_sent);
  75         /* curses takes care of ^Z */
  76         my_win.x_nlines = LINES / 2;
  77         my_win.x_ncols = COLS;
  78         my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
  79         scrollok(my_win.x_win, FALSE);
  80         wclear(my_win.x_win);
  81
  82         his_win.x_nlines = LINES / 2 - 1;
  83         his_win.x_ncols = COLS;
  84         his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
  85             my_win.x_nlines+1, 0);
  86         scrollok(his_win.x_win, FALSE);
  87         wclear(his_win.x_win);
  88
  89         line_win = newwin(1, COLS, my_win.x_nlines, 0);
  90         box(line_win, '-', '-');
  91         wrefresh(line_win);
  92         /* let them know we are working on it */
  93         current_state = "No connection yet";
  94 }
  95
  96 /*
  97  * Trade edit characters with the other talk. By agreement
  98  * the first three characters each talk transmits after
  99  * connection are the three edit characters.
 100  */
 101 void
 102 set_edit_chars()
 103 {
 104         char buf[3];
 105         int cc;
 106         struct termios tty;
 107
 108         tcgetattr(0, &tty);
 109         my_win.cerase = tty.c_cc[VERASE];
 110         my_win.kill = tty.c_cc[VKILL];
 111         if (tty.c_cc[VWERASE] == (unsigned char) -1)
 112                 my_win.werase = '\027';  /* control W */
 113         else
 114                 my_win.werase = tty.c_cc[VWERASE];
 115         buf[0] = my_win.cerase;
 116         buf[1] = my_win.kill;
 117         buf[2] = my_win.werase;
 118         cc = write(sockt, buf, sizeof(buf));
 119         if (cc != sizeof(buf) )
 120                 p_error("Lost the connection");
 121         cc = read(sockt, buf, sizeof(buf));
 122         if (cc != sizeof(buf) )
 123                 p_error("Lost the connection");
 124         his_win.cerase = buf[0];
 125         his_win.kill = buf[1];
 126         his_win.werase = buf[2];
 127 }
 128
 129 void
 130 sig_sent(dummy)
 131         int dummy;
 132 {
 133
 134         message("Connection closing. Exiting");
 135         quit();
 136 }
 137
 138 /*
 139  * All done talking...hang up the phone and reset terminal thingy's
 140  */
 141 void
 142 quit()
 143 {
 144
 145         if (curses_initialized) {
 146                 wmove(his_win.x_win, his_win.x_nlines-1, 0);
 147                 wclrtoeol(his_win.x_win);
 148                 wrefresh(his_win.x_win);
 149                 endwin();
 150         }
 151         if (invitation_waiting)
 152                 send_delete();
 153         exit(0);
 154 }