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tipout.c revision 1.5 
      1 /*	$NetBSD: tipout.c,v 1.5 1996/12/29 10:34:12 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)tipout.c	8.1 (Berkeley) 6/6/93";
     39 #endif
     40 static char rcsid[] = "$NetBSD: tipout.c,v 1.5 1996/12/29 10:34:12 cgd Exp $";
     41 #endif /* not lint */
     42 
     43 #include "tip.h"
     44 /*
     45  * tip
     46  *
     47  * lower fork of tip -- handles passive side
     48  *  reading from the remote host
     49  */
     50 
     51 static	jmp_buf sigbuf;
     52 
     53 /*
     54  * TIPOUT wait state routine --
     55  *   sent by TIPIN when it wants to posses the remote host
     56  */
     57 void
     58 intIOT()
     59 {
     60 
     61 	write(repdes[1],&ccc,1);
     62 	read(fildes[0], &ccc,1);
     63 	longjmp(sigbuf, 1);
     64 }
     65 
     66 /*
     67  * Scripting command interpreter --
     68  *  accepts script file name over the pipe and acts accordingly
     69  */
     70 void
     71 intEMT()
     72 {
     73 	char c, line[256];
     74 	register char *pline = line;
     75 	char reply;
     76 
     77 	read(fildes[0], &c, 1);
     78 	while (c != '\n') {
     79 		*pline++ = c;
     80 		read(fildes[0], &c, 1);
     81 	}
     82 	*pline = '\0';
     83 	if (boolean(value(SCRIPT)) && fscript != NULL)
     84 		fclose(fscript);
     85 	if (pline == line) {
     86 		setboolean(value(SCRIPT), FALSE);
     87 		reply = 'y';
     88 	} else {
     89 		if ((fscript = fopen(line, "a")) == NULL)
     90 			reply = 'n';
     91 		else {
     92 			reply = 'y';
     93 			setboolean(value(SCRIPT), TRUE);
     94 		}
     95 	}
     96 	write(repdes[1], &reply, 1);
     97 	longjmp(sigbuf, 1);
     98 }
     99 
    100 void
    101 intTERM()
    102 {
    103 
    104 	if (boolean(value(SCRIPT)) && fscript != NULL)
    105 		fclose(fscript);
    106 	exit(0);
    107 }
    108 
    109 void
    110 intSYS()
    111 {
    112 
    113 	setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY)));
    114 	longjmp(sigbuf, 1);
    115 }
    116 
    117 /*
    118  * ****TIPOUT   TIPOUT****
    119  */
    120 tipout()
    121 {
    122 	char buf[BUFSIZ];
    123 	register char *cp;
    124 	register int cnt;
    125 	extern int errno;
    126 	int omask;
    127 
    128 	signal(SIGINT, SIG_IGN);
    129 	signal(SIGQUIT, SIG_IGN);
    130 	signal(SIGEMT, intEMT);		/* attention from TIPIN */
    131 	signal(SIGTERM, intTERM);	/* time to go signal */
    132 	signal(SIGIOT, intIOT);		/* scripting going on signal */
    133 	signal(SIGHUP, intTERM);	/* for dial-ups */
    134 	signal(SIGSYS, intSYS);		/* beautify toggle */
    135 	(void) setjmp(sigbuf);
    136 	for (omask = 0;; sigsetmask(omask)) {
    137 		cnt = read(FD, buf, BUFSIZ);
    138 		if (cnt <= 0) {
    139 			/* lost carrier */
    140 			if (cnt < 0 && errno == EIO) {
    141 				sigblock(sigmask(SIGTERM));
    142 				intTERM();
    143 				/*NOTREACHED*/
    144 			}
    145 			continue;
    146 		}
    147 #define	ALLSIGS	sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS)
    148 		omask = sigblock(ALLSIGS);
    149 		for (cp = buf; cp < buf + cnt; cp++)
    150 			*cp &= STRIP_PAR;
    151 		write(1, buf, cnt);
    152 		if (boolean(value(SCRIPT)) && fscript != NULL) {
    153 			if (!boolean(value(BEAUTIFY))) {
    154 				fwrite(buf, 1, cnt, fscript);
    155 				continue;
    156 			}
    157 			for (cp = buf; cp < buf + cnt; cp++)
    158 				if ((*cp >= ' ' && *cp <= '~') ||
    159 				    any(*cp, value(EXCEPTIONS)))
    160 					putc(*cp, fscript);
    161 		}
    162 	}
    163 }
    164