386BSD 0.1 development

[unix-history] / usr / src / usr.bin / tip / tipout.c

/*
* Copyright (c) 1983 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    5.4 (Berkeley) 3/2/91";
#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*/
                       }
                       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);
               }
       }
}