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- /*
- * 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.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93";
- #endif /* not lint */
-
- /*
- * This file contains the I/O handling and the exchange of
- * edit characters. This connection itself is established in
- * ctl.c
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #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);
- }
- }
- }
-
- extern int errno;
- extern int sys_nerr;
-
- /*
- * 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);
- }
-