1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 /* 41 * this file contains the I/O handling and the exchange of 42 * edit characters. This connection itself is established in ctl.c 43 */ 44 45 #include "talk.h" 46 #include <stdio.h> 47 #include <errno.h> 48 #include <sys/time.h> 49 #include <sys/filio.h> 50 #include <libintl.h> 51 52 #define A_LONG_TIME 10000000 53 #define STDIN_MASK (1<<fileno(stdin)) /* the bit mask for standard input */ 54 55 /* 56 * The routine to do the actual talking 57 */ 58 59 void 60 talk() 61 { 62 int read_template, sockt_mask; 63 int read_set, nb; 64 char buf[BUFSIZ]; 65 struct timeval wait; 66 67 message(gettext("Connection established")); 68 beep(); beep(); beep(); 69 current_line = 0; 70 71 sockt_mask = (1<<sockt); 72 73 /* 74 * wait on both the other process (sockt_mask) and 75 * standard input ( STDIN_MASK ) 76 */ 77 78 read_template = sockt_mask | STDIN_MASK; 79 80 forever { 81 82 read_set = read_template; 83 84 wait.tv_sec = A_LONG_TIME; 85 wait.tv_usec = 0; 86 87 nb = select(32, (fd_set *)&read_set, 0, 0, &wait); 88 89 if (nb <= 0) { 90 91 /* We may be returning from an interrupt handler */ 92 93 if (errno == EINTR) { 94 read_set = read_template; 95 continue; 96 } else { 97 /* panic, we don't know what happened */ 98 p_error( 99 gettext("Unexpected error from select")); 100 quit(); 101 } 102 } 103 104 if (read_set & sockt_mask) { 105 106 /* There is data on sockt */ 107 nb = read(sockt, buf, sizeof (buf)); 108 109 if (nb <= 0) { 110 message(gettext("Connection closed. Exiting")); 111 pause(); /* wait for Ctrl-C */ 112 quit(); 113 } else { 114 display(&rem_win, buf, nb); 115 } 116 } 117 118 if (read_set & STDIN_MASK) { 119 120 /* 121 * we can't make the tty non_blocking, because 122 * curses's output routines would screw up 123 */ 124 125 ioctl(0, FIONREAD, (struct sgttyb *)&nb); 126 nb = read(0, buf, nb); 127 display(&my_win, buf, nb); 128 write(sockt, buf, nb); 129 130 /* 131 * We might lose data here because sockt is 132 * non-blocking 133 */ 134 } 135 } 136 } 137 138 139 /* 140 * p_error prints the system error message on the standard location 141 * on the screen and then exits. (i.e. a curses version of perror) 142 */ 143 144 void 145 p_error(char *string) 146 { 147 wmove(my_win.x_win, current_line%my_win.x_nlines, 0); 148 wprintw(my_win.x_win, "[%s : %s]\n", string, strerror(errno)); 149 wrefresh(my_win.x_win); 150 move(LINES-1, 0); 151 refresh(); 152 quit(); 153 } 154 155 /* display string in the standard location */ 156 157 void 158 message(char *string) 159 { 160 wmove(my_win.x_win, current_line%my_win.x_nlines, 0); 161 wprintw(my_win.x_win, "[%s]\n", string); 162 wrefresh(my_win.x_win); 163 } 164