1 /* $OpenBSD: tipout.c,v 1.8 2001/10/24 18:38:58 millert Exp $ */ 2 /* $NetBSD: tipout.c,v 1.5 1996/12/29 10:34:12 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)tipout.c 8.1 (Berkeley) 6/6/93"; 43 static char rcsid[] = "$OpenBSD: tipout.c,v 1.8 2001/10/24 18:38:58 millert Exp $"; 44 #endif 45 #endif /* not lint */ 46 47 #include "tip.h" 48 /* 49 * tip 50 * 51 * lower fork of tip -- handles passive side 52 * reading from the remote host 53 */ 54 55 static jmp_buf sigbuf; 56 57 /* 58 * TIPOUT wait state routine -- 59 * sent by TIPIN when it wants to posses the remote host 60 */ 61 void 62 intIOT() 63 { 64 65 write(repdes[1],&ccc,1); 66 read(fildes[0], &ccc,1); 67 longjmp(sigbuf, 1); 68 } 69 70 /* 71 * Scripting command interpreter -- 72 * accepts script file name over the pipe and acts accordingly 73 */ 74 void 75 intEMT() 76 { 77 char c, line[256]; 78 char *pline = line; 79 char reply; 80 81 read(fildes[0], &c, 1); 82 while (c != '\n' && pline - line < sizeof(line)) { 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() 106 { 107 108 if (boolean(value(SCRIPT)) && fscript != NULL) 109 fclose(fscript); 110 exit(0); 111 } 112 113 void 114 intSYS() 115 { 116 117 setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY))); 118 longjmp(sigbuf, 1); 119 } 120 121 /* 122 * ****TIPOUT TIPOUT**** 123 */ 124 void 125 tipout() 126 { 127 char buf[BUFSIZ]; 128 char *cp; 129 int cnt; 130 sigset_t mask, omask; 131 132 signal(SIGINT, SIG_IGN); 133 signal(SIGQUIT, SIG_IGN); 134 signal(SIGEMT, intEMT); /* attention from TIPIN */ 135 signal(SIGTERM, intTERM); /* time to go signal */ 136 signal(SIGIOT, intIOT); /* scripting going on signal */ 137 signal(SIGHUP, intTERM); /* for dial-ups */ 138 signal(SIGSYS, intSYS); /* beautify toggle */ 139 (void) setjmp(sigbuf); 140 sigprocmask(SIG_BLOCK, NULL, &omask); 141 for (;;) { 142 sigprocmask(SIG_SETMASK, &omask, NULL); 143 cnt = read(FD, buf, BUFSIZ); 144 if (cnt <= 0) { 145 /* lost carrier */ 146 if (cnt < 0 && errno == EIO) { 147 sigemptyset(&mask); 148 sigaddset(&mask, SIGTERM); 149 sigprocmask(SIG_BLOCK, &mask, NULL); 150 intTERM(); 151 /*NOTREACHED*/ 152 } 153 continue; 154 } 155 sigemptyset(&mask); 156 sigaddset(&mask, SIGEMT); 157 sigaddset(&mask, SIGTERM); 158 sigaddset(&mask, SIGIOT); 159 sigaddset(&mask, SIGSYS); 160 sigprocmask(SIG_BLOCK, &mask, NULL); 161 for (cp = buf; cp < buf + cnt; cp++) 162 *cp &= STRIP_PAR; 163 write(1, buf, cnt); 164 if (boolean(value(SCRIPT)) && fscript != NULL) { 165 if (!boolean(value(BEAUTIFY))) { 166 fwrite(buf, 1, cnt, fscript); 167 continue; 168 } 169 for (cp = buf; cp < buf + cnt; cp++) 170 if ((*cp >= ' ' && *cp <= '~') || 171 any(*cp, value(EXCEPTIONS))) 172 putc(*cp, fscript); 173 } 174 } 175 } 176