/* $OpenBSD: io.c,v 1.18 2010/08/12 23:31:29 tedu Exp $ */ /* $NetBSD: io.c,v 1.4 1994/12/09 02:14:20 jtc Exp $ */ /* * 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. 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 "talk.h" #include #include #include #include #include #include #define A_LONG_TIME 1000000 volatile sig_atomic_t gotwinch; /* * The routine to do the actual talking */ void talk(void) { struct pollfd fds[2]; char buf[BUFSIZ]; int nb; #if defined(NCURSES_VERSION) || defined(beep) message("Connection established"); beep(); beep(); beep(); #else message("Connection established\007\007\007"); #endif current_line = 0; /* * Wait on both the other process (sockt_mask) and * standard input ( STDIN_MASK ) */ fds[0].fd = fileno(stdin); fds[0].events = POLLIN; fds[1].fd = sockt; fds[1].events = POLLIN; for (;;) { nb = poll(fds, 2, A_LONG_TIME * 1000); if (gotwinch) { resize_display(); gotwinch = 0; } if (nb <= 0) { if (errno == EINTR) continue; /* panic, we don't know what happened */ quit("Unexpected error from select", 1); } if (fds[1].revents & POLLIN) { /* There is data on sockt */ nb = read(sockt, buf, sizeof buf); if (nb <= 0) quit("Connection closed. Exiting", 0); display(&his_win, buf, nb); } if (fds[0].revents & POLLIN) { /* * We can't make the tty non_blocking, because * curses's output routines would screw up */ ioctl(0, FIONREAD, &nb); nb = read(STDIN_FILENO, buf, nb); display(&my_win, buf, nb); /* might lose data here because sockt is non-blocking */ write(sockt, buf, nb); } } } /* * Display string in the standard location */ void message(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); }