1 /* 2 * Copyright (c) 1983 The Regents of the University of California. 3 * 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 /*static char sccsid[] = "from: @(#)tipout.c 5.4 (Berkeley) 3/2/91";*/ 36 static char rcsid[] = "$Id: tipout.c,v 1.2 1993/08/01 18:06:34 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include "tip.h" 40 /* 41 * tip 42 * 43 * lower fork of tip -- handles passive side 44 * reading from the remote host 45 */ 46 47 static jmp_buf sigbuf; 48 49 /* 50 * TIPOUT wait state routine -- 51 * sent by TIPIN when it wants to posses the remote host 52 */ 53 void 54 intIOT() 55 { 56 57 write(repdes[1],&ccc,1); 58 read(fildes[0], &ccc,1); 59 longjmp(sigbuf, 1); 60 } 61 62 /* 63 * Scripting command interpreter -- 64 * accepts script file name over the pipe and acts accordingly 65 */ 66 void 67 intEMT() 68 { 69 char c, line[256]; 70 register char *pline = line; 71 char reply; 72 73 read(fildes[0], &c, 1); 74 while (c != '\n') { 75 *pline++ = c; 76 read(fildes[0], &c, 1); 77 } 78 *pline = '\0'; 79 if (boolean(value(SCRIPT)) && fscript != NULL) 80 fclose(fscript); 81 if (pline == line) { 82 boolean(value(SCRIPT)) = FALSE; 83 reply = 'y'; 84 } else { 85 if ((fscript = fopen(line, "a")) == NULL) 86 reply = 'n'; 87 else { 88 reply = 'y'; 89 boolean(value(SCRIPT)) = TRUE; 90 } 91 } 92 write(repdes[1], &reply, 1); 93 longjmp(sigbuf, 1); 94 } 95 96 void 97 intTERM() 98 { 99 100 if (boolean(value(SCRIPT)) && fscript != NULL) 101 fclose(fscript); 102 exit(0); 103 } 104 105 void 106 intSYS() 107 { 108 109 boolean(value(BEAUTIFY)) = !boolean(value(BEAUTIFY)); 110 longjmp(sigbuf, 1); 111 } 112 113 /* 114 * ****TIPOUT TIPOUT**** 115 */ 116 tipout() 117 { 118 char buf[BUFSIZ]; 119 register char *cp; 120 register int cnt; 121 extern int errno; 122 int omask; 123 124 signal(SIGINT, SIG_IGN); 125 signal(SIGQUIT, SIG_IGN); 126 signal(SIGEMT, intEMT); /* attention from TIPIN */ 127 signal(SIGTERM, intTERM); /* time to go signal */ 128 signal(SIGIOT, intIOT); /* scripting going on signal */ 129 signal(SIGHUP, intTERM); /* for dial-ups */ 130 signal(SIGSYS, intSYS); /* beautify toggle */ 131 (void) setjmp(sigbuf); 132 for (omask = 0;; sigsetmask(omask)) { 133 cnt = read(FD, buf, BUFSIZ); 134 if (cnt <= 0) { 135 /* lost carrier */ 136 if (cnt < 0 && errno == EIO) { 137 sigblock(sigmask(SIGTERM)); 138 intTERM(); 139 /*NOTREACHED*/ 140 } 141 continue; 142 } 143 #define ALLSIGS sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS) 144 omask = sigblock(ALLSIGS); 145 for (cp = buf; cp < buf + cnt; cp++) 146 *cp &= 0177; 147 write(1, buf, cnt); 148 if (boolean(value(SCRIPT)) && fscript != NULL) { 149 if (!boolean(value(BEAUTIFY))) { 150 fwrite(buf, 1, cnt, fscript); 151 continue; 152 } 153 for (cp = buf; cp < buf + cnt; cp++) 154 if ((*cp >= ' ' && *cp <= '~') || 155 any(*cp, value(EXCEPTIONS))) 156 putc(*cp, fscript); 157 } 158 } 159 } 160