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/* $NetBSD: tipout.c,v 1.15 2011/09/06 18:33:01 joerg 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.
*/
#include <sys/cdefs.h>
#include <poll.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)tipout.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: tipout.c,v 1.15 2011/09/06 18:33:01 joerg Exp $");
#endif /* not lint */
#include "tip.h"
/*
* tip
*
* lower fork of tip -- handles passive side
* reading from the remote host
*/
void intEMT(void);
void intIOT(void);
void intSYS(void);
__dead static void intTERM(int);
/*
* TIPOUT wait state routine --
* sent by TIPIN when it wants to posses the remote host
*/
void
intIOT(void)
{
(void)write(repdes[1],&ccc,1); /* We got the message */
(void)read(fildes[0], &ccc,1); /* Now wait for coprocess */
}
/*
* Scripting command interpreter --
* accepts script file name over the pipe and acts accordingly
*/
void
intEMT(void)
{
char c, line[256];
char *pline = line;
char reply;
(void)read(fildes[0], &c, 1); /* We got the message */
while (c != '\n' && line + sizeof line - pline > 0) {
*pline++ = c;
(void)read(fildes[0], &c, 1);
}
*pline = '\0';
if (boolean(value(SCRIPT)) && fscript != NULL)
(void)fclose(fscript);
if (pline == line) {
setboolean(value(SCRIPT), FALSE);
reply = 'y';
} else {
if ((fscript = fopen(line, "a")) == NULL)
reply = 'n';
else {
reply = 'y';
setboolean(value(SCRIPT), TRUE);
}
}
(void)write(repdes[1], &reply, 1); /* Now coprocess waits for us */
}
static void
/*ARGSUSED*/
intTERM(int dummy __unused)
{
if (boolean(value(SCRIPT)) && fscript != NULL)
(void)fclose(fscript);
exit(0);
}
void
intSYS(void)
{
setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY)));
}
/*
* ****TIPOUT TIPOUT****
*/
void
tipout(void)
{
char buf[BUFSIZ];
char *cp;
int cnt;
int omask;
struct pollfd pfd[2];
(void)signal(SIGINT, SIG_IGN);
(void)signal(SIGQUIT, SIG_IGN);
(void)signal(SIGHUP, intTERM); /* for dial-ups */
(void)signal(SIGTERM, intTERM); /* time to go signal*/
pfd[0].fd = attndes[0];
pfd[0].events = POLLIN;
pfd[1].fd = FD;
pfd[1].events = POLLIN|POLLHUP;
for (omask = 0;; (void)sigsetmask(omask)) {
if (poll(pfd, 2, -1) > 0) {
if (pfd[0].revents & POLLIN)
if (read(attndes[0], &ccc, 1) > 0) {
switch(ccc) {
case 'W':
intIOT(); /* TIPIN wants us to wait */
break;
case 'S':
intEMT(); /* TIPIN wants us to script */
break;
case 'B':
intSYS(); /* "Beautify" value toggle */
break;
default:
break;
}
}
}
if (pfd[1].revents & (POLLIN|POLLHUP)) {
cnt = read(FD, buf, BUFSIZ);
if (cnt <= 0) {
/* lost carrier || EOF */
if ((cnt < 0 && errno == EIO) || (cnt == 0)) {
(void)sigblock(sigmask(SIGTERM));
intTERM(0);
/*NOTREACHED*/
}
continue;
}
omask = sigblock(SIGTERM);
for (cp = buf; cp < buf + cnt; cp++)
*cp &= STRIP_PAR;
(void)write(1, buf, (size_t)cnt);
if (boolean(value(SCRIPT)) && fscript != NULL) {
if (!boolean(value(BEAUTIFY))) {
(void)fwrite(buf, 1, (size_t)cnt, fscript);
continue;
}
for (cp = buf; cp < buf + cnt; cp++)
if ((*cp >= ' ' && *cp <= '~') ||
any(*cp, value(EXCEPTIONS)))
(void)putc(*cp, fscript);
}
}
}
}
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