Annotation of src/usr.bin/talk/init_disp.c, Revision 1.23
1.23 ! deraadt 1: /* $OpenBSD: init_disp.c,v 1.22 2016/02/01 07:29:25 mestre Exp $ */
1.1 deraadt 2: /* $NetBSD: init_disp.c,v 1.6 1994/12/09 02:14:17 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.16 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Initialization code for the display package,
35: * as well as the signal handling routines.
36: */
37:
38: #include <sys/ioctl.h>
1.22 mestre 39:
1.4 pjanzen 40: #include <err.h>
1.18 david 41: #include <stdlib.h>
1.1 deraadt 42: #include <termios.h>
1.4 pjanzen 43: #include <unistd.h>
1.22 mestre 44:
45: #include "talk.h"
1.1 deraadt 46:
1.5 millert 47: /*
1.1 deraadt 48: * Set up curses, catch the appropriate signals,
49: * and build the various windows.
50: */
1.4 pjanzen 51: void
1.17 deraadt 52: init_display(void)
1.1 deraadt 53: {
1.5 millert 54: struct sigaction sa;
1.1 deraadt 55:
56: if (initscr() == NULL)
57: errx(1, "Terminal type unset or lacking necessary features.");
1.5 millert 58: (void) sigaction(SIGTSTP, NULL, &sa);
59: sigaddset(&sa.sa_mask, SIGALRM);
60: (void) sigaction(SIGTSTP, &sa, NULL);
1.1 deraadt 61: curses_initialized = 1;
62: clear();
63: refresh();
64: noecho();
1.9 millert 65: cbreak();
1.1 deraadt 66: signal(SIGINT, sig_sent);
67: signal(SIGPIPE, sig_sent);
1.15 millert 68: signal(SIGWINCH, sig_winch);
1.1 deraadt 69: /* curses takes care of ^Z */
70: my_win.x_nlines = LINES / 2;
71: my_win.x_ncols = COLS;
72: my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
1.14 millert 73: scrollok(my_win.x_win, smooth_scroll);
1.1 deraadt 74: wclear(my_win.x_win);
75:
76: his_win.x_nlines = LINES / 2 - 1;
77: his_win.x_ncols = COLS;
78: his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
79: my_win.x_nlines+1, 0);
1.14 millert 80: scrollok(his_win.x_win, smooth_scroll);
1.1 deraadt 81: wclear(his_win.x_win);
82:
83: line_win = newwin(1, COLS, my_win.x_nlines, 0);
1.5 millert 84: #if defined(NCURSES_VERSION) || defined(whline)
1.2 tholo 85: whline(line_win, '-', COLS);
86: #else
1.1 deraadt 87: box(line_win, '-', '-');
1.2 tholo 88: #endif
1.1 deraadt 89: wrefresh(line_win);
90: /* let them know we are working on it */
91: current_state = "No connection yet";
92: }
93:
94: /*
95: * Trade edit characters with the other talk. By agreement
96: * the first three characters each talk transmits after
97: * connection are the three edit characters.
98: */
1.4 pjanzen 99: void
1.17 deraadt 100: set_edit_chars(void)
1.1 deraadt 101: {
1.6 deraadt 102: u_char buf[3];
1.1 deraadt 103: int cc;
104: struct termios tty;
105:
1.15 millert 106: tcgetattr(STDIN_FILENO, &tty);
1.7 millert 107: buf[0] = my_win.cerase = (tty.c_cc[VERASE] == (u_char)_POSIX_VDISABLE)
1.5 millert 108: ? CERASE : tty.c_cc[VERASE];
1.7 millert 109: buf[1] = my_win.kill = (tty.c_cc[VKILL] == (u_char)_POSIX_VDISABLE)
1.6 deraadt 110: ? CKILL : tty.c_cc[VKILL];
1.7 millert 111: buf[2] = my_win.werase = (tty.c_cc[VWERASE] == (u_char)_POSIX_VDISABLE)
1.5 millert 112: ? CWERASE : tty.c_cc[VWERASE];
1.1 deraadt 113: cc = write(sockt, buf, sizeof(buf));
114: if (cc != sizeof(buf) )
1.8 millert 115: quit("Lost the connection", 1);
1.1 deraadt 116: cc = read(sockt, buf, sizeof(buf));
117: if (cc != sizeof(buf) )
1.8 millert 118: quit("Lost the connection", 1);
1.1 deraadt 119: his_win.cerase = buf[0];
120: his_win.kill = buf[1];
121: his_win.werase = buf[2];
122: }
123:
124: void
1.17 deraadt 125: sig_sent(int dummy)
1.1 deraadt 126: {
127:
1.8 millert 128: quit("Connection closing. Exiting", 0);
1.1 deraadt 129: }
130:
1.15 millert 131: void
1.17 deraadt 132: sig_winch(int dummy)
1.15 millert 133: {
134:
135: gotwinch = 1;
136: }
137:
1.1 deraadt 138: /*
139: * All done talking...hang up the phone and reset terminal thingy's
140: */
1.4 pjanzen 141: void
1.17 deraadt 142: quit(char *warning, int do_perror)
1.1 deraadt 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();
1.8 millert 153: if (warning) {
154: if (do_perror)
1.11 millert 155: warn("%s", warning);
1.8 millert 156: else
1.11 millert 157: warnx("%s", warning);
1.8 millert 158: }
1.1 deraadt 159: exit(0);
1.15 millert 160: }
161:
162: /*
163: * If we get SIGWINCH, recompute both window sizes and refresh things.
164: */
165: void
1.17 deraadt 166: resize_display(void)
1.15 millert 167: {
168: struct winsize ws;
169:
1.23 ! deraadt 170: if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1 ||
1.15 millert 171: (ws.ws_row == LINES && ws.ws_col == COLS))
172: return;
173:
174: /* Update curses' internal state with new window size. */
175: resizeterm(ws.ws_row, ws.ws_col);
176:
177: /*
178: * Resize each window but wait to refresh the screen until
179: * everything has been drawn so the cursor is in the right spot.
180: */
181: my_win.x_nlines = LINES / 2;
182: my_win.x_ncols = COLS;
183: wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols);
184: mvwin(my_win.x_win, 0, 0);
185: clearok(my_win.x_win, TRUE);
186:
187: his_win.x_nlines = LINES / 2 - 1;
188: his_win.x_ncols = COLS;
189: wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols);
190: mvwin(his_win.x_win, my_win.x_nlines + 1, 0);
191: clearok(his_win.x_win, TRUE);
192:
193: wresize(line_win, 1, COLS);
194: mvwin(line_win, my_win.x_nlines, 0);
195: #if defined(NCURSES_VERSION) || defined(whline)
196: whline(line_win, '-', COLS);
197: #else
198: wmove(line_win, my_win.x_nlines, 0);
199: box(line_win, '-', '-');
200: #endif
201:
202: /* Now redraw the screen. */
203: wrefresh(his_win.x_win);
204: wrefresh(line_win);
205: wrefresh(my_win.x_win);
1.1 deraadt 206: }
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