1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)tipout.c 8.1 (Berkeley) 6/6/93"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 40 #endif /* not lint */ 41 42 #include "tip.h" 43 /* 44 * tip 45 * 46 * lower fork of tip -- handles passive side 47 * reading from the remote host 48 */ 49 50 static jmp_buf sigbuf; 51 52 /* 53 * TIPOUT wait state routine -- 54 * sent by TIPIN when it wants to posses the remote host 55 */ 56 void 57 intIOT() 58 { 59 60 write(repdes[1],&ccc,1); 61 read(fildes[0], &ccc,1); 62 longjmp(sigbuf, 1); 63 } 64 65 /* 66 * Scripting command interpreter -- 67 * accepts script file name over the pipe and acts accordingly 68 */ 69 void 70 intEMT() 71 { 72 char c, line[256]; 73 register char *pline = line; 74 char reply; 75 76 read(fildes[0], &c, 1); 77 while (c != '\n' && pline - line < sizeof(line)) { 78 *pline++ = c; 79 read(fildes[0], &c, 1); 80 } 81 *pline = '\0'; 82 if (boolean(value(SCRIPT)) && fscript != NULL) 83 fclose(fscript); 84 if (pline == line) { 85 boolean(value(SCRIPT)) = FALSE; 86 reply = 'y'; 87 } else { 88 if ((fscript = fopen(line, "a")) == NULL) 89 reply = 'n'; 90 else { 91 reply = 'y'; 92 boolean(value(SCRIPT)) = TRUE; 93 } 94 } 95 write(repdes[1], &reply, 1); 96 longjmp(sigbuf, 1); 97 } 98 99 void 100 intTERM() 101 { 102 103 if (boolean(value(SCRIPT)) && fscript != NULL) 104 fclose(fscript); 105 exit(0); 106 } 107 108 void 109 intSYS() 110 { 111 112 boolean(value(BEAUTIFY)) = !boolean(value(BEAUTIFY)); 113 longjmp(sigbuf, 1); 114 } 115 116 /* 117 * ****TIPOUT TIPOUT**** 118 */ 119 void 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 } else if (cnt == 0 && errno == ENOENT) { 145 if (getppid() != 1) 146 kill(getppid(),SIGUSR1); 147 sigblock(sigmask(SIGTERM)); 148 intTERM(); 149 /*NOTREACHED*/ 150 } else if (cnt < 0) { 151 if (getppid() != 1) 152 kill(getppid(),SIGUSR1); 153 sigblock(sigmask(SIGTERM)); 154 intTERM(); 155 /*NOTREACHED*/ 156 } 157 continue; 158 } 159 #define ALLSIGS sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS) 160 omask = sigblock(ALLSIGS); 161 for (cp = buf; cp < buf + cnt; cp++) 162 *cp &= 0177; 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