1 /* $NetBSD: tipout.c,v 1.9 2005/12/09 03:15:42 gavan 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)tipout.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: tipout.c,v 1.9 2005/12/09 03:15:42 gavan Exp $"); 38 #endif /* not lint */ 39 40 #include "tip.h" 41 /* 42 * tip 43 * 44 * lower fork of tip -- handles passive side 45 * reading from the remote host 46 */ 47 48 static jmp_buf sigbuf; 49 50 void intEMT __P((int)); 51 void intIOT __P((int)); 52 void intSYS __P((int)); 53 void intTERM __P((int)); 54 55 /* 56 * TIPOUT wait state routine -- 57 * sent by TIPIN when it wants to posses the remote host 58 */ 59 void 60 intIOT(dummy) 61 int dummy; 62 { 63 64 write(repdes[1],&ccc,1); 65 read(fildes[0], &ccc,1); 66 longjmp(sigbuf, 1); 67 } 68 69 /* 70 * Scripting command interpreter -- 71 * accepts script file name over the pipe and acts accordingly 72 */ 73 void 74 intEMT(dummy) 75 int dummy; 76 { 77 char c, line[256]; 78 char *pline = line; 79 char reply; 80 81 read(fildes[0], &c, 1); 82 while (c != '\n' && line + sizeof line - pline > 0) { 83 *pline++ = c; 84 read(fildes[0], &c, 1); 85 } 86 *pline = '\0'; 87 if (boolean(value(SCRIPT)) && fscript != NULL) 88 fclose(fscript); 89 if (pline == line) { 90 setboolean(value(SCRIPT), FALSE); 91 reply = 'y'; 92 } else { 93 if ((fscript = fopen(line, "a")) == NULL) 94 reply = 'n'; 95 else { 96 reply = 'y'; 97 setboolean(value(SCRIPT), TRUE); 98 } 99 } 100 write(repdes[1], &reply, 1); 101 longjmp(sigbuf, 1); 102 } 103 104 void 105 intTERM(dummy) 106 int dummy; 107 { 108 109 if (boolean(value(SCRIPT)) && fscript != NULL) 110 fclose(fscript); 111 exit(0); 112 } 113 114 void 115 intSYS(dummy) 116 int dummy; 117 { 118 119 setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY))); 120 longjmp(sigbuf, 1); 121 } 122 123 /* 124 * ****TIPOUT TIPOUT**** 125 */ 126 void 127 tipout() 128 { 129 char buf[BUFSIZ]; 130 char *cp; 131 int cnt; 132 int omask; 133 134 signal(SIGINT, SIG_IGN); 135 signal(SIGQUIT, SIG_IGN); 136 signal(SIGEMT, intEMT); /* attention from TIPIN */ 137 signal(SIGTERM, intTERM); /* time to go signal */ 138 signal(SIGIOT, intIOT); /* scripting going on signal */ 139 signal(SIGHUP, intTERM); /* for dial-ups */ 140 signal(SIGSYS, intSYS); /* beautify toggle */ 141 (void) setjmp(sigbuf); 142 for (omask = 0;; sigsetmask(omask)) { 143 cnt = read(FD, buf, BUFSIZ); 144 if (cnt <= 0) { 145 /* lost carrier || EOF */ 146 if ((cnt < 0 && errno == EIO) || (cnt == 0)) { 147 sigblock(sigmask(SIGTERM)); 148 intTERM(0); 149 /*NOTREACHED*/ 150 } 151 continue; 152 } 153 #define ALLSIGS sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS) 154 omask = sigblock(ALLSIGS); 155 for (cp = buf; cp < buf + cnt; cp++) 156 *cp &= STRIP_PAR; 157 write(1, buf, cnt); 158 if (boolean(value(SCRIPT)) && fscript != NULL) { 159 if (!boolean(value(BEAUTIFY))) { 160 fwrite(buf, 1, cnt, fscript); 161 continue; 162 } 163 for (cp = buf; cp < buf + cnt; cp++) 164 if ((*cp >= ' ' && *cp <= '~') || 165 any(*cp, value(EXCEPTIONS))) 166 putc(*cp, fscript); 167 } 168 } 169 } 170