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 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 /* 43 * this file contains the I/O handling and the exchange of 44 * edit characters. This connection itself is established in ctl.c 45 */ 46 47 #include "talk.h" 48 #include <stdio.h> 49 #include <errno.h> 50 #include <sys/time.h> 51 #include <sys/filio.h> 52 #include <libintl.h> 53 54 #define A_LONG_TIME 10000000 55 #define STDIN_MASK (1<<fileno(stdin)) /* the bit mask for standard input */ 56 57 /* 58 * The routine to do the actual talking 59 */ 60 61 void 62 talk() 63 { 64 int read_template, sockt_mask; 65 int read_set, nb; 66 char buf[BUFSIZ]; 67 struct timeval wait; 68 69 message(gettext("Connection established")); 70 beep(); beep(); beep(); 71 current_line = 0; 72 73 sockt_mask = (1<<sockt); 74 75 /* 76 * wait on both the other process (sockt_mask) and 77 * standard input ( STDIN_MASK ) 78 */ 79 80 read_template = sockt_mask | STDIN_MASK; 81 82 forever { 83 84 read_set = read_template; 85 86 wait.tv_sec = A_LONG_TIME; 87 wait.tv_usec = 0; 88 89 nb = select(32, (fd_set *)&read_set, 0, 0, &wait); 90 91 if (nb <= 0) { 92 93 /* We may be returning from an interrupt handler */ 94 95 if (errno == EINTR) { 96 read_set = read_template; 97 continue; 98 } else { 99 /* panic, we don't know what happened */ 100 p_error( 101 gettext("Unexpected error from select")); 102 quit(); 103 } 104 } 105 106 if (read_set & sockt_mask) { 107 108 /* There is data on sockt */ 109 nb = read(sockt, buf, sizeof (buf)); 110 111 if (nb <= 0) { 112 message(gettext("Connection closed. Exiting")); 113 pause(); /* wait for Ctrl-C */ 114 quit(); 115 } else { 116 display(&rem_win, buf, nb); 117 } 118 } 119 120 if (read_set & STDIN_MASK) { 121 122 /* 123 * we can't make the tty non_blocking, because 124 * curses's output routines would screw up 125 */ 126 127 ioctl(0, FIONREAD, (struct sgttyb *)&nb); 128 nb = read(0, buf, nb); 129 display(&my_win, buf, nb); 130 write(sockt, buf, nb); 131 132 /* 133 * We might lose data here because sockt is 134 * non-blocking 135 */ 136 } 137 } 138 } 139 140 141 /* 142 * p_error prints the system error message on the standard location 143 * on the screen and then exits. (i.e. a curses version of perror) 144 */ 145 146 void 147 p_error(char *string) 148 { 149 wmove(my_win.x_win, current_line%my_win.x_nlines, 0); 150 wprintw(my_win.x_win, "[%s : %s]\n", string, strerror(errno)); 151 wrefresh(my_win.x_win); 152 move(LINES-1, 0); 153 refresh(); 154 quit(); 155 } 156 157 /* display string in the standard location */ 158 159 void 160 message(char *string) 161 { 162 wmove(my_win.x_win, current_line%my_win.x_nlines, 0); 163 wprintw(my_win.x_win, "[%s]\n", string); 164 wrefresh(my_win.x_win); 165 } 166