86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
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* TNET A server program for MINIX which implements the TCP/IP
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* suite of networking protocols. It is based on the
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* TCP/IP code written by Phil Karn et al, as found in
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* his NET package for Packet Radio communications.
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*
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* Handle the TERMINAL module.
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*
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* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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* Michael Temari, <temari@temari.ae.ge.com>
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*
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* 07/29/92 MT Telnet options hack which seems to work okay
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* 01/12/93 MT Better telnet options processing instead of hack
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*/
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#include <sys/types.h>
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#include <errno.h>
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#if 0
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#include <fcntl.h>
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#endif
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdio.h>
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#include <signal.h>
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#include "telnet.h"
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#include "telnetd.h"
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void sig_done(int sig);
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static char buff[4096];
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void term_init()
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{
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tel_init();
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telopt(1, WILL, TELOPT_SGA);
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telopt(1, DO, TELOPT_SGA);
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telopt(1, WILL, TELOPT_BINARY);
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telopt(1, DO, TELOPT_BINARY);
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telopt(1, WILL, TELOPT_ECHO);
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telopt(1, DO, TELOPT_WINCH);
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}
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static int io_done = 0;
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void term_inout(pty_fd)
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int pty_fd;
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{
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register int i;
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pid_t pid;
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struct sigaction sa;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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sa.sa_handler = sig_done;
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sigaction(SIGALRM, &sa, (struct sigaction *) NULL);
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if ((pid = fork()) == -1) {
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sprintf(buff, "telnetd: fork() failed: %s\r\n", strerror(errno));
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(void) write(1, buff, strlen(buff));
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}
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if (pid != 0) {
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/* network -> login process */
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while (!io_done && (i = read(0, buff, sizeof(buff))) > 0) {
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tel_in(pty_fd, 1, buff, i);
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}
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/* EOF, kill opposite number and exit. */
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(void) kill(pid, SIGKILL);
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} else {
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/* login process -> network */
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while ((i = read(pty_fd, buff, sizeof(buff))) > 0) {
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tel_out(1, buff, i);
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}
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/* EOF, alert opposite number and exit. */
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(void) kill(getppid(), SIGALRM);
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}
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/* EOF. */
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}
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void sig_done(sig)
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int sig;
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{
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io_done = 1;
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alarm(1); /* there is always a chance... */
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}
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