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1.1 root 1: /* $Header: init_disp.c,v 1.2 85/01/09 13:04:54 rcs Exp $ */
2:
3: /*
4: * init_disp contains the initialization code for the display package,
5: * as well as the signal handling routines
6: */
7:
8: #include "talk.h"
9: #include <signal.h>
10:
11: /*
12: * Changes:
13: * . add function to verify that the terminal is cursor addressable.
14: * . add function to handle QUIT signal.
15: *
16: */
17: /*
18: * set up curses, catch the appropriate signals, and build the
19: * various windows
20: */
21:
22: init_display()
23: {
24: void sig_sent();
25:
26: checkcrt(); /* check if terminal is cursor addressable */
27: initscr();
28: curses_initialized = 1;
29:
30: clear();
31: refresh();
32:
33: noecho();
34: crmode();
35:
36: signal(SIGINT, sig_sent);
37: signal(SIGQUIT, sig_sent);
38: signal(SIGPIPE, sig_sent);
39:
40: /* curses takes care of ^Z */
41:
42: my_win.x_nlines = LINES / 2;
43: my_win.x_ncols = COLS;
44: my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
45: scrollok(my_win.x_win, FALSE);
46: wclear(my_win.x_win);
47:
48: his_win.x_nlines = LINES / 2 - 1;
49: his_win.x_ncols = COLS;
50: his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
51: my_win.x_nlines+1, 0);
52: scrollok(his_win.x_win, FALSE);
53: wclear(his_win.x_win);
54:
55: line_win = newwin(1, COLS, my_win.x_nlines, 0);
56: box(line_win, '-', '-');
57: wrefresh(line_win);
58:
59: /* let them know we are working on it */
60:
61: current_state = "No connection yet";
62: }
63:
64: /* trade edit characters with the other talk. By agreement
65: * the first three characters each talk transmits after
66: * connection are the three edit characters
67: */
68:
69: set_edit_chars()
70: {
71: char buf[3];
72: int cc;
73: struct sgttyb tty;
74: struct ltchars ltc;
75:
76: gtty(0, &tty);
77:
78: ioctl(0, TIOCGLTC, (struct sgttyb *) <c);
79:
80: my_win.cerase = tty.sg_erase;
81: my_win.kill = tty.sg_kill;
82:
83: if (ltc.t_werasc == (char) -1) {
84: my_win.werase = '\027'; /* control W */
85: } else {
86: my_win.werase = ltc.t_werasc;
87: }
88:
89: buf[0] = my_win.cerase;
90: buf[1] = my_win.kill;
91: buf[2] = my_win.werase;
92:
93: cc = write(sockt, buf, sizeof(buf));
94:
95: if (cc != sizeof(buf) ) {
96: p_error("Lost the connection");
97: }
98:
99: cc = read(sockt, buf, sizeof(buf));
100:
101: if (cc != sizeof(buf) ) {
102: p_error("Lost the connection");
103: }
104:
105: his_win.cerase = buf[0];
106: his_win.kill = buf[1];
107: his_win.werase = buf[2];
108: }
109:
110: void sig_sent()
111: {
112: message("Connection closing. Exiting");
113: quit();
114: }
115:
116: /*
117: * All done talking...hang up the phone and reset terminal thingy's
118: */
119:
120: quit()
121: {
122: if (curses_initialized) {
123: wmove(his_win.x_win, his_win.x_nlines-1, 0);
124: wclrtoeol(his_win.x_win);
125: wrefresh(his_win.x_win);
126: endwin();
127: }
128:
129: if (invitation_waiting) {
130: send_delete();
131: }
132:
133: exit(0);
134: }
135: /*------------------------------------------------------------
136: checkcrt
137: verify if the terminal is cursor addressable
138: ----------------------------------------------------------*/
139: char *CM;
140: char *getenv();
141: char *tgetstr();
142: checkcrt(){
143: char *termname;
144: char *x;
145: char *y;
146: char cm[1024];
147: char buf[1024];
148:
149: if ((termname = getenv("TERM")) == (char *)0) {
150: printf("talk:terminal type not defined.\n");
151: exit(2);
152: }
153: switch (tgetent(buf, termname)) {
154: case -1:
155: printf("talk:cannot open termcap file.\n");
156: exit(3);
157: case 0:
158: printf("talk:terminal type not defined in termcap file.\n");
159: exit(4);
160: }
161:
162: x = cm;
163: CM = tgetstr("cm",&x);
164: if (!CM || *CM==0) {
165: printf("talk: terminal must have addressable cursor.\n");
166: exit(5);
167: }
168: }
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