140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)io.c 5.5 (Berkeley) 6/1/90";
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#endif /* not lint */
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/*
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* This file contains the I/O handling and the exchange of
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* edit characters. This connection itself is established in
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* ctl.c
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*/
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#include <sys/time.h>
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#include "talk.h"
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#define A_LONG_TIME 10000000
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#define STDIN_MASK (1<<fileno(stdin)) /* the bit mask for standard
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input */
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/*
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* The routine to do the actual talking
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*/
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talk()
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{
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register int read_template, sockt_mask;
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int read_set, nb;
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char buf[BUFSIZ];
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struct timeval wait;
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#ifdef sgi
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message("Connection established");
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#else
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message("Connection established\007\007\007");
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#endif
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current_line = 0;
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sockt_mask = (1<<sockt);
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/*
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* Wait on both the other process (sockt_mask) and
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* standard input ( STDIN_MASK )
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*/
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read_template = sockt_mask | STDIN_MASK;
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forever {
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read_set = read_template;
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wait.tv_sec = A_LONG_TIME;
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wait.tv_usec = 0;
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nb = select(32, &read_set, 0, 0, &wait);
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if (nb <= 0) {
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if (errno == EINTR) {
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read_set = read_template;
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continue;
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}
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/* panic, we don't know what happened */
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p_error("Unexpected error from select");
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quit();
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}
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if (read_set & sockt_mask) {
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/* There is data on sockt */
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nb = read(sockt, buf, sizeof buf);
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if (nb <= 0) {
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message("Connection closed. Exiting");
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quit();
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}
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display(&his_win, buf, nb);
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}
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if (read_set & STDIN_MASK) {
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/*
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* We can't make the tty non_blocking, because
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* curses's output routines would screw up
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*/
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ioctl(0, FIONREAD, (struct sgttyb *) &nb);
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nb = read(0, buf, nb);
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#ifdef sgi
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/* XXX Convert carriage returns to line feeds. */
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{
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register int i;
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for(i=0;i<nb;i++) if(buf[i]=='\r')buf[i]='\n';
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}
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#endif
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display(&my_win, buf, nb);
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/* might lose data here because sockt is non-blocking */
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write(sockt, buf, nb);
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}
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}
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}
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extern int errno;
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extern int sys_nerr;
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/*
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* p_error prints the system error message on the standard location
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* on the screen and then exits. (i.e. a curses version of perror)
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*/
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p_error(string)
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char *string;
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{
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wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
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if (errno)
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wprintw(my_win.x_win, "[%s : %s (%d)]\n",
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string, strerror(errno), errno);
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else
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wprintw(my_win.x_win, "[%s]\n", string);
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wrefresh(my_win.x_win);
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move(LINES-1, 0);
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refresh();
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quit();
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}
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/*
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* Display string in the standard location
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*/
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message(string)
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char *string;
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{
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wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
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wprintw(my_win.x_win, "[%s]\n", string);
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wrefresh(my_win.x_win);
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}
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