File: [local] / src / usr.bin / tip / Attic / tipout.c (download)
Revision 1.23, Thu Jul 1 21:28:01 2010 UTC (13 years, 10 months ago) by nicm
Branch: MAIN
CVS Tags: OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5, OPENBSD_5_4_BASE, OPENBSD_5_4, OPENBSD_5_3_BASE, OPENBSD_5_3, OPENBSD_5_2_BASE, OPENBSD_5_2, OPENBSD_5_1_BASE, OPENBSD_5_1, OPENBSD_5_0_BASE, OPENBSD_5_0, OPENBSD_4_9_BASE, OPENBSD_4_9, OPENBSD_4_8_BASE, OPENBSD_4_8 Changes since 1.22: +11 -11 lines
Change variable get/set macros to have better names and drop boolean/character
ones.
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/* $OpenBSD: tipout.c,v 1.23 2010/07/01 21:28:01 nicm Exp $ */
/* $NetBSD: tipout.c,v 1.5 1996/12/29 10:34:12 cgd 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/types.h>
#include <poll.h>
#include "tip.h"
/*
* tip
*
* lower fork of tip -- handles passive side
* reading from the remote host
*/
static void tipout_wait(void);
static void tipout_script(void);
static void tipout_write(char *, size_t);
static void tipout_sighandler(int);
volatile sig_atomic_t tipout_die;
/*
* TIPOUT wait state routine --
* sent by TIPIN when it wants to possess the remote host
*/
static void
tipout_wait(void)
{
write(tipin_fd, &ccc, 1);
read(tipin_fd, &ccc, 1);
}
/*
* Scripting command interpreter --
* accepts script file name over the pipe and acts accordingly
*/
static void
tipout_script(void)
{
char c, line[256];
char *pline = line;
char reply;
read(tipin_fd, &c, 1);
while (c != '\n' && pline - line < sizeof(line)) {
*pline++ = c;
read(tipin_fd, &c, 1);
}
*pline = '\0';
if (vgetnum(SCRIPT) && fscript != NULL)
fclose(fscript);
if (pline == line) {
vsetnum(SCRIPT, 0);
reply = 'y';
} else {
if ((fscript = fopen(line, "a")) == NULL)
reply = 'n';
else {
reply = 'y';
vsetnum(SCRIPT, 1);
}
}
write(tipin_fd, &reply, 1);
}
/*
* Write remote input out to stdout (and script file if enabled).
*/
static void
tipout_write(char *buf, size_t len)
{
char *cp;
for (cp = buf; cp < buf + len; cp++)
*cp &= STRIP_PAR;
write(STDOUT_FILENO, buf, len);
if (vgetnum(SCRIPT) && fscript != NULL) {
if (!vgetnum(BEAUTIFY))
fwrite(buf, 1, len, fscript);
else {
for (cp = buf; cp < buf + len; cp++) {
if ((*cp >= ' ' && *cp <= '~') ||
any(*cp, vgetstr(EXCEPTIONS)))
putc(*cp, fscript);
}
}
}
}
/* ARGSUSED */
static void
tipout_sighandler(int signo)
{
tipout_die = 1;
}
/*
* ****TIPOUT TIPOUT****
*/
void
tipout(void)
{
struct pollfd pfds[2];
char buf[BUFSIZ], ch;
ssize_t len;
int flag;
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
tipout_die = 0;
signal(SIGTERM, tipout_sighandler);
signal(SIGHUP, tipout_sighandler);
pfds[0].fd = tipin_fd;
pfds[0].events = POLLIN;
pfds[1].fd = FD;
pfds[1].events = POLLIN;
while (!tipout_die) {
if (poll(pfds, 2, INFTIM) == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
goto fail;
}
if (pfds[0].revents & (POLLHUP|POLLERR))
goto fail;
if (pfds[0].revents & POLLIN) {
switch (read(tipin_fd, &ch, 1)) {
case 0:
goto fail;
case -1:
if (errno == EINTR || errno == EAGAIN)
break;
goto fail;
default:
switch (ch) {
case 'W': /* wait state */
tipout_wait();
break;
case 'S': /* script file */
tipout_script();
break;
case 'B': /* toggle beautify */
flag = !vgetnum(BEAUTIFY);
vsetnum(BEAUTIFY, flag);
break;
}
break;
}
}
if (pfds[1].revents & (POLLHUP|POLLERR))
goto fail;
if (pfds[1].revents & POLLIN) {
switch (len = read(FD, buf, BUFSIZ)) {
case 0:
goto fail;
case -1:
if (errno == EINTR || errno == EAGAIN)
continue;
goto fail;
default:
tipout_write(buf, len);
break;
}
}
}
fail:
if (vgetnum(SCRIPT) && fscript != NULL)
fclose(fscript);
kill(tipin_pid, SIGTERM);
exit(0);
}