1 /* $OpenBSD: io.c,v 1.20 2016/02/18 21:51:20 espie Exp $ */
2 /* $NetBSD: io.c,v 1.4 1994/12/09 02:14:20 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.
16 * 3. Neither the name of the University nor the names of its contributors
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 * This file contains the I/O handling and the exchange of
35 * edit characters. This connection itself is established in
36 * ctl.c
37 */
38
39 #include <sys/ioctl.h>
40
41 #include <errno.h>
42 #include <poll.h>
43 #include <unistd.h>
44
45 #include "talk.h"
46
47 #define A_LONG_TIME 1000000
48
49 volatile sig_atomic_t gotwinch;
50
51 /*
52 * The routine to do the actual talking
53 */
54 void
talk(void)55 talk(void)
56 {
57 struct pollfd fds[2];
58 char buf[BUFSIZ];
59 int nb;
60
61 #if defined(NCURSES_VERSION) || defined(beep)
62 message("Connection established");
63 beep();
64 beep();
65 beep();
66 #else
67 message("Connection established\007\007\007");
68 #endif
69 current_line = 0;
70
71 /*
72 * Wait on both the other process (sockt_mask) and
73 * standard input ( STDIN_MASK )
74 */
75 fds[0].fd = fileno(stdin);
76 fds[0].events = POLLIN;
77 fds[1].fd = sockt;
78 fds[1].events = POLLIN;
79
80 for (;;) {
81 nb = poll(fds, 2, A_LONG_TIME * 1000);
82 if (gotwinch) {
83 resize_display();
84 gotwinch = 0;
85 }
86 if (nb <= 0) {
87 if (errno == EINTR)
88 continue;
89 /* panic, we don't know what happened */
90 quit("Unexpected error from poll", 1);
91 }
92 if (fds[1].revents & POLLIN) {
93 /* There is data on sockt */
94 nb = read(sockt, buf, sizeof buf);
95 if (nb <= 0)
96 quit("Connection closed. Exiting", 0);
97 display(&his_win, buf, nb);
98 }
99 if (fds[0].revents & POLLIN) {
100 /*
101 * We can't make the tty non_blocking, because
102 * curses's output routines would screw up
103 */
104 ioctl(0, FIONREAD, &nb);
105 nb = read(STDIN_FILENO, buf, nb);
106 display(&my_win, buf, nb);
107 /* might lose data here because sockt is non-blocking */
108 write(sockt, buf, nb);
109 }
110 }
111 }
112
113 /*
114 * Display string in the standard location
115 */
116 void
message(char * string)117 message(char *string)
118 {
119 wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
120 wprintw(my_win.x_win, "[%s]", string);
121 wclrtoeol(my_win.x_win);
122 current_line++;
123 wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
124 wrefresh(my_win.x_win);
125 }
126