Annotation of src/usr.bin/talk/io.c, Revision 1.18
1.18 ! tedu 1: /* $OpenBSD: io.c,v 1.17 2009/10/27 23:59:44 deraadt Exp $ */
1.1 deraadt 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.
1.12 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: /*
1.7 millert 34: * This file contains the I/O handling and the exchange of
1.1 deraadt 35: * edit characters. This connection itself is established in
36: * ctl.c
37: */
38:
1.5 pjanzen 39: #include "talk.h"
1.1 deraadt 40: #include <sys/ioctl.h>
41: #include <sys/time.h>
42: #include <stdio.h>
1.14 deraadt 43: #include <poll.h>
1.1 deraadt 44: #include <errno.h>
1.5 pjanzen 45: #include <unistd.h>
1.1 deraadt 46:
1.14 deraadt 47: #define A_LONG_TIME 1000000
1.1 deraadt 48:
1.18 ! tedu 49: volatile sig_atomic_t gotwinch;
1.11 millert 50:
1.1 deraadt 51: /*
52: * The routine to do the actual talking
53: */
1.5 pjanzen 54: void
1.13 deraadt 55: talk(void)
1.1 deraadt 56: {
1.14 deraadt 57: struct pollfd fds[2];
58: char buf[BUFSIZ];
1.5 pjanzen 59: int nb;
1.1 deraadt 60:
1.7 millert 61: #if defined(NCURSES_VERSION) || defined(beep)
1.2 tholo 62: message("Connection established");
63: beep();
64: beep();
65: beep();
66: #else
1.1 deraadt 67: message("Connection established\007\007\007");
1.2 tholo 68: #endif
1.1 deraadt 69: current_line = 0;
70:
71: /*
1.7 millert 72: * Wait on both the other process (sockt_mask) and
1.1 deraadt 73: * standard input ( STDIN_MASK )
74: */
1.14 deraadt 75: fds[0].fd = fileno(stdin);
76: fds[0].events = POLLIN;
77: fds[1].fd = sockt;
78: fds[1].events = POLLIN;
79:
1.1 deraadt 80: for (;;) {
1.14 deraadt 81: nb = poll(fds, 2, A_LONG_TIME * 1000);
1.11 millert 82: if (gotwinch) {
83: resize_display();
84: gotwinch = 0;
85: }
1.1 deraadt 86: if (nb <= 0) {
1.14 deraadt 87: if (errno == EINTR)
1.1 deraadt 88: continue;
89: /* panic, we don't know what happened */
1.9 millert 90: quit("Unexpected error from select", 1);
1.1 deraadt 91: }
1.14 deraadt 92: if (fds[1].revents & POLLIN) {
1.1 deraadt 93: /* There is data on sockt */
94: nb = read(sockt, buf, sizeof buf);
1.9 millert 95: if (nb <= 0)
96: quit("Connection closed. Exiting", 0);
1.1 deraadt 97: display(&his_win, buf, nb);
98: }
1.14 deraadt 99: if (fds[0].revents & POLLIN) {
1.1 deraadt 100: /*
101: * We can't make the tty non_blocking, because
102: * curses's output routines would screw up
103: */
1.6 millert 104: ioctl(0, FIONREAD, &nb);
1.16 deraadt 105: nb = read(STDIN_FILENO, buf, nb);
1.1 deraadt 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: */
1.5 pjanzen 116: void
1.13 deraadt 117: message(char *string)
1.1 deraadt 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: }
![[BACK]](/icons/back.gif){kind=icon}
Return to io.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / talk