/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights * Reserved. This file contains Original Code and/or Modifications of * Original Code as defined in and that are subject to the Apple Public * Source License Version 1.0 (the 'License'). You may not use this file * except in compliance with the License. Please obtain a copy of the * License at http://www.apple.com/publicsource and read it before using * this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License." * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * This file contains the I/O handling and the exchange of * edit characters. This connection itself is established in * ctl.c */ #include <sys/ioctl.h> #include <sys/time.h> #include <stdio.h> #include <errno.h> #include <string.h> #include "talk.h" #define A_LONG_TIME 10000000 #define STDIN_MASK (1<<fileno(stdin)) /* the bit mask for standard input */ /* * The routine to do the actual talking */ talk() { register int read_template, sockt_mask; int read_set, nb; char buf[BUFSIZ]; struct timeval wait; message("Connection established\007\007\007"); current_line = 0; sockt_mask = (1<<sockt); /* * Wait on both the other process (sockt_mask) and * standard input ( STDIN_MASK ) */ read_template = sockt_mask | STDIN_MASK; for (;;) { read_set = read_template; wait.tv_sec = A_LONG_TIME; wait.tv_usec = 0; nb = select(32, &read_set, 0, 0, &wait); if (nb <= 0) { if (errno == EINTR) { read_set = read_template; continue; } /* panic, we don't know what happened */ p_error("Unexpected error from select"); quit(); } if (read_set & sockt_mask) { /* There is data on sockt */ nb = read(sockt, buf, sizeof buf); if (nb <= 0) { message("Connection closed. Exiting"); quit(); } display(&his_win, buf, nb); } if (read_set & STDIN_MASK) { /* * We can't make the tty non_blocking, because * curses's output routines would screw up */ ioctl(0, FIONREAD, (struct sgttyb *) &nb); nb = read(0, buf, nb); display(&my_win, buf, nb); /* might lose data here because sockt is non-blocking */ write(sockt, buf, nb); } } } /* * p_error prints the system error message on the standard location * on the screen and then exits. (i.e. a curses version of perror) */ p_error(string) char *string; { wmove(my_win.x_win, current_line%my_win.x_nlines, 0); wprintw(my_win.x_win, "[%s : %s (%d)]\n", string, strerror(errno), errno); wrefresh(my_win.x_win); move(LINES-1, 0); refresh(); quit(); } /* * Display string in the standard location */ message(string) char *string; { wmove(my_win.x_win, current_line % my_win.x_nlines, 0); wprintw(my_win.x_win, "[%s]", string); wclrtoeol(my_win.x_win); current_line++; wmove(my_win.x_win, current_line % my_win.x_nlines, 0); wrefresh(my_win.x_win); }