freebsd-dev/usr.bin/tip/tipout.c

167 lines
4.3 KiB
C

/*
* 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.
*/
#ifndef lint
static char sccsid[] = "@(#)tipout.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include "tip.h"
/*
* tip
*
* lower fork of tip -- handles passive side
* reading from the remote host
*/
static jmp_buf sigbuf;
/*
* TIPOUT wait state routine --
* sent by TIPIN when it wants to posses the remote host
*/
void
intIOT()
{
write(repdes[1],&ccc,1);
read(fildes[0], &ccc,1);
longjmp(sigbuf, 1);
}
/*
* Scripting command interpreter --
* accepts script file name over the pipe and acts accordingly
*/
void
intEMT()
{
char c, line[256];
register char *pline = line;
char reply;
read(fildes[0], &c, 1);
while (c != '\n') {
*pline++ = c;
read(fildes[0], &c, 1);
}
*pline = '\0';
if (boolean(value(SCRIPT)) && fscript != NULL)
fclose(fscript);
if (pline == line) {
boolean(value(SCRIPT)) = FALSE;
reply = 'y';
} else {
if ((fscript = fopen(line, "a")) == NULL)
reply = 'n';
else {
reply = 'y';
boolean(value(SCRIPT)) = TRUE;
}
}
write(repdes[1], &reply, 1);
longjmp(sigbuf, 1);
}
void
intTERM()
{
if (boolean(value(SCRIPT)) && fscript != NULL)
fclose(fscript);
exit(0);
}
void
intSYS()
{
boolean(value(BEAUTIFY)) = !boolean(value(BEAUTIFY));
longjmp(sigbuf, 1);
}
/*
* ****TIPOUT TIPOUT****
*/
tipout()
{
char buf[BUFSIZ];
register char *cp;
register int cnt;
extern int errno;
int omask;
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
signal(SIGEMT, intEMT); /* attention from TIPIN */
signal(SIGTERM, intTERM); /* time to go signal */
signal(SIGIOT, intIOT); /* scripting going on signal */
signal(SIGHUP, intTERM); /* for dial-ups */
signal(SIGSYS, intSYS); /* beautify toggle */
(void) setjmp(sigbuf);
for (omask = 0;; sigsetmask(omask)) {
cnt = read(FD, buf, BUFSIZ);
if (cnt <= 0) {
/* lost carrier */
if (cnt < 0 && errno == EIO) {
sigblock(sigmask(SIGTERM));
intTERM();
/*NOTREACHED*/
} else if (cnt == 0 && errno == ENOENT) {
kill(getppid(),SIGUSR1);
sigblock(sigmask(SIGTERM));
intTERM();
/*NOTREACHED*/
} else {
printf("%d %d\r",cnt,errno);
fflush(stdout);
}
continue;
}
#define ALLSIGS sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS)
omask = sigblock(ALLSIGS);
for (cp = buf; cp < buf + cnt; cp++)
*cp &= 0177;
write(1, buf, cnt);
if (boolean(value(SCRIPT)) && fscript != NULL) {
if (!boolean(value(BEAUTIFY))) {
fwrite(buf, 1, cnt, fscript);
continue;
}
for (cp = buf; cp < buf + cnt; cp++)
if ((*cp >= ' ' && *cp <= '~') ||
any(*cp, value(EXCEPTIONS)))
putc(*cp, fscript);
}
}
}