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