diff options
Diffstat (limited to 'remote_cmds/talk.tproj/io.c')
| -rw-r--r-- | remote_cmds/talk.tproj/io.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/remote_cmds/talk.tproj/io.c b/remote_cmds/talk.tproj/io.c new file mode 100644 index 0000000..644c28b --- /dev/null +++ b/remote_cmds/talk.tproj/io.c @@ -0,0 +1,188 @@ +/* + * 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. + */ + +#include <sys/cdefs.h> + +#ifndef __APPLE__ +__FBSDID("$FreeBSD: src/usr.bin/talk/io.c,v 1.16 2004/05/10 15:52:16 cognet Exp $"); + +#ifndef lint +static const char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93"; +#endif +#endif /* __APPLE__ */ + +/* + * This file contains the I/O handling and the exchange of + * edit characters. This connection itself is established in + * ctl.c + */ + +#include <sys/filio.h> +#ifdef __APPLE__ +#include <sys/ioctl.h> +#endif + +#include <errno.h> +#include <signal.h> +#include <netdb.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "talk.h" +#include "talk_ctl.h" + +#define A_LONG_TIME 10000000 + +volatile sig_atomic_t gotwinch = 0; + +/* + * The routine to do the actual talking + */ +void +talk() +{ + struct hostent *hp, *hp2; + int nb; + fd_set read_set, read_template; + char buf[BUFSIZ], **addr, *his_machine_name; + struct timeval wait; + + his_machine_name = NULL; + hp = gethostbyaddr((const char *)&his_machine_addr.s_addr, + sizeof(his_machine_addr.s_addr), AF_INET); + if (hp != NULL) { + hp2 = gethostbyname(hp->h_name); + if (hp2 != NULL && hp2->h_addrtype == AF_INET && + hp2->h_length == sizeof(his_machine_addr)) + for (addr = hp2->h_addr_list; *addr != NULL; addr++) + if (memcmp(*addr, &his_machine_addr, + sizeof(his_machine_addr)) == 0) { + his_machine_name = strdup(hp->h_name); + break; + } + } + if (his_machine_name == NULL) + his_machine_name = strdup(inet_ntoa(his_machine_addr)); + snprintf(buf, sizeof(buf), "Connection established with %s@%s.", + msg.r_name, his_machine_name); + free(his_machine_name); + message(buf); + write(STDOUT_FILENO, "\007\007\007", 3); + + current_line = 0; + + /* + * Wait on both the other process (sockt_mask) and + * standard input ( STDIN_MASK ) + */ + FD_ZERO(&read_template); + FD_SET(sockt, &read_template); + FD_SET(fileno(stdin), &read_template); + for (;;) { + read_set = read_template; + wait.tv_sec = A_LONG_TIME; + wait.tv_usec = 0; + nb = select(sockt + 1, &read_set, 0, 0, &wait); + if (gotwinch) { + resize_display(); + gotwinch = 0; + } + 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 (FD_ISSET(sockt, &read_set)) { + /* 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 (FD_ISSET(fileno(stdin), &read_set)) { + /* + * We can't make the tty non_blocking, because + * curses's output routines would screw up + */ + int i; + ioctl(0, FIONREAD, (void *) &nb); + if (nb > sizeof buf) + nb = sizeof buf; + nb = read(STDIN_FILENO, buf, nb); + display(&my_win, buf, nb); + /* might lose data here because sockt is non-blocking */ + for (i = 0; i < nb; ++i) + if (buf[i] == '\r') + buf[i] = '\n'; + 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) + */ +void +p_error(string) + const char *string; +{ + wmove(my_win.x_win, current_line, 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 + */ +void +message(string) + const char *string; +{ + wmove(my_win.x_win, current_line, 0); + wprintw(my_win.x_win, "[%s]\n", string); + if (current_line < my_win.x_nlines - 1) + current_line++; + wrefresh(my_win.x_win); +} |