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tipout.c revision 1.6 
      1 /*	$NetBSD: tipout.c,v 1.6 1997/11/22 07:28:48 lukem 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 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)tipout.c	8.1 (Berkeley) 6/6/93";
     40 #endif
     41 __RCSID("$NetBSD: tipout.c,v 1.6 1997/11/22 07:28:48 lukem Exp $");
     42 #endif /* not lint */
     43 
     44 #include "tip.h"
     45 /*
     46  * tip
     47  *
     48  * lower fork of tip -- handles passive side
     49  *  reading from the remote host
     50  */
     51 
     52 static	jmp_buf sigbuf;
     53 
     54 void	intEMT __P((int));
     55 void	intIOT __P((int));
     56 void	intSYS __P((int));
     57 void	intTERM __P((int));
     58 
     59 /*
     60  * TIPOUT wait state routine --
     61  *   sent by TIPIN when it wants to posses the remote host
     62  */
     63 void
     64 intIOT(dummy)
     65 	int dummy;
     66 {
     67 
     68 	write(repdes[1],&ccc,1);
     69 	read(fildes[0], &ccc,1);
     70 	longjmp(sigbuf, 1);
     71 }
     72 
     73 /*
     74  * Scripting command interpreter --
     75  *  accepts script file name over the pipe and acts accordingly
     76  */
     77 void
     78 intEMT(dummy)
     79 	int dummy;
     80 {
     81 	char c, line[256];
     82 	char *pline = line;
     83 	char reply;
     84 
     85 	read(fildes[0], &c, 1);
     86 	while (c != '\n') {
     87 		*pline++ = c;
     88 		read(fildes[0], &c, 1);
     89 	}
     90 	*pline = '\0';
     91 	if (boolean(value(SCRIPT)) && fscript != NULL)
     92 		fclose(fscript);
     93 	if (pline == line) {
     94 		setboolean(value(SCRIPT), FALSE);
     95 		reply = 'y';
     96 	} else {
     97 		if ((fscript = fopen(line, "a")) == NULL)
     98 			reply = 'n';
     99 		else {
    100 			reply = 'y';
    101 			setboolean(value(SCRIPT), TRUE);
    102 		}
    103 	}
    104 	write(repdes[1], &reply, 1);
    105 	longjmp(sigbuf, 1);
    106 }
    107 
    108 void
    109 intTERM(dummy)
    110 	int dummy;
    111 {
    112 
    113 	if (boolean(value(SCRIPT)) && fscript != NULL)
    114 		fclose(fscript);
    115 	exit(0);
    116 }
    117 
    118 void
    119 intSYS(dummy)
    120 	int dummy;
    121 {
    122 
    123 	setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY)));
    124 	longjmp(sigbuf, 1);
    125 }
    126 
    127 /*
    128  * ****TIPOUT   TIPOUT****
    129  */
    130 void
    131 tipout()
    132 {
    133 	char buf[BUFSIZ];
    134 	char *cp;
    135 	int cnt;
    136 	int omask;
    137 
    138 	signal(SIGINT, SIG_IGN);
    139 	signal(SIGQUIT, SIG_IGN);
    140 	signal(SIGEMT, intEMT);		/* attention from TIPIN */
    141 	signal(SIGTERM, intTERM);	/* time to go signal */
    142 	signal(SIGIOT, intIOT);		/* scripting going on signal */
    143 	signal(SIGHUP, intTERM);	/* for dial-ups */
    144 	signal(SIGSYS, intSYS);		/* beautify toggle */
    145 	(void) setjmp(sigbuf);
    146 	for (omask = 0;; sigsetmask(omask)) {
    147 		cnt = read(FD, buf, BUFSIZ);
    148 		if (cnt <= 0) {
    149 			/* lost carrier */
    150 			if (cnt < 0 && errno == EIO) {
    151 				sigblock(sigmask(SIGTERM));
    152 				intTERM(0);
    153 				/*NOTREACHED*/
    154 			}
    155 			continue;
    156 		}
    157 #define	ALLSIGS	sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS)
    158 		omask = sigblock(ALLSIGS);
    159 		for (cp = buf; cp < buf + cnt; cp++)
    160 			*cp &= STRIP_PAR;
    161 		write(1, buf, cnt);
    162 		if (boolean(value(SCRIPT)) && fscript != NULL) {
    163 			if (!boolean(value(BEAUTIFY))) {
    164 				fwrite(buf, 1, cnt, fscript);
    165 				continue;
    166 			}
    167 			for (cp = buf; cp < buf + cnt; cp++)
    168 				if ((*cp >= ' ' && *cp <= '~') ||
    169 				    any(*cp, value(EXCEPTIONS)))
    170 					putc(*cp, fscript);
    171 		}
    172 	}
    173 }
    174