source: trunk/third/talk/talk/io.c @ 9271

Revision 9271, 4.3 KB checked in by ghudson, 28 years ago (diff)
From the 8.0 tree: uses curses beep instead of writing an ASCII 7; convert \r to \n in read buffer. Changes by mbarker, mostly. Also, remove a comment made vestigial by the last change.
Line 
1/*      $NetBSD: io.c,v 1.4 1994/12/09 02:14:20 jtc 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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by the University of
18 *      California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)io.c        8.1 (Berkeley) 6/6/93";
39#endif
40static char rcsid[] = "$NetBSD: io.c,v 1.4 1994/12/09 02:14:20 jtc Exp $";
41#endif /* not lint */
42
43/*
44 * This file contains the I/O handling and the exchange of
45 * edit characters. This connection itself is established in
46 * ctl.c
47 */
48
49#include <sys/ioctl.h>
50#include <sys/time.h>
51#include <stdio.h>
52#include <errno.h>
53#include <string.h>
54#include <curses.h>
55#include "talk.h"
56
57#define A_LONG_TIME 10000000
58#define STDIN_MASK (1<<fileno(stdin))   /* the bit mask for standard
59                                           input */
60
61/*
62 * The routine to do the actual talking
63 */
64talk()
65{
66        register int read_template, sockt_mask;
67        int read_set, nb;
68        char buf[BUFSIZ], *p;
69        struct timeval wait;
70
71        message("Connection established");
72        beep();
73        beep();
74        beep();
75        current_line = 0;
76        sockt_mask = (1<<sockt);
77
78        /*
79         * Wait on both the other process (sockt_mask) and
80         * standard input ( STDIN_MASK )
81         */
82        read_template = sockt_mask | STDIN_MASK;
83        for (;;) {
84                read_set = read_template;
85                wait.tv_sec = A_LONG_TIME;
86                wait.tv_usec = 0;
87                nb = select(32, &read_set, 0, 0, &wait);
88                if (nb <= 0) {
89                        if (errno == EINTR) {
90                                read_set = read_template;
91                                continue;
92                        }
93                        /* panic, we don't know what happened */
94                        p_error("Unexpected error from select");
95                        quit();
96                }
97                if (read_set & sockt_mask) {
98                        /* There is data on sockt */
99                        nb = read(sockt, buf, sizeof buf);
100                        if (nb <= 0) {
101                                message("Connection closed. Exiting");
102                                quit();
103                        }
104                        display(&his_win, buf, nb);
105                }
106                if (read_set & STDIN_MASK) {
107                        nb = read(0, buf, sizeof(buf));
108                        for (p = buf; p < buf + nb; p++) {
109                                if (*p == '\r')
110                                        *p = '\n';
111                        }
112                        display(&my_win, buf, nb);
113                        /* might lose data here because sockt is non-blocking */
114                        write(sockt, buf, nb);
115                }
116        }
117}
118
119extern  int errno;
120extern  int sys_nerr;
121
122/*
123 * p_error prints the system error message on the standard location
124 * on the screen and then exits. (i.e. a curses version of perror)
125 */
126p_error(string)
127        char *string;
128{
129        wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
130        wprintw(my_win.x_win, "[%s : %s (%d)]\n",
131            string, strerror(errno), errno);
132        wrefresh(my_win.x_win);
133        move(LINES-1, 0);
134        refresh();
135        quit();
136}
137
138/*
139 * Display string in the standard location
140 */
141message(string)
142        char *string;
143{
144        wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
145        wprintw(my_win.x_win, "[%s]", string);
146        wclrtoeol(my_win.x_win);
147        current_line++;
148        wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
149        wrefresh(my_win.x_win);
150}
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