1 /*- 2 * Copyright (c) 1989, 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)unvis.c 8.1 (Berkeley) 6/6/93 31 * $NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $ 32 */ 33 34 #include <err.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <unistd.h> 38 #include <vis.h> 39 40 static void process(FILE *, const char *, int); 41 42 int 43 main(int argc, char *argv[]) 44 { 45 FILE *fp; 46 int ch, eflags = 0; 47 48 setprogname(argv[0]); 49 while ((ch = getopt(argc, argv, "eHhm")) != -1) 50 switch((char)ch) { 51 case 'e': 52 eflags |= VIS_NOESCAPE; 53 break; 54 case 'H': 55 eflags |= VIS_HTTP1866; 56 break; 57 case 'h': 58 eflags |= VIS_HTTP1808; 59 break; 60 case 'm': 61 eflags |= VIS_MIMESTYLE; 62 break; 63 case '?': 64 default: 65 fprintf(stderr, 66 "usage: %s [-e] [-Hh | -m] [file...]\n", 67 getprogname()); 68 return EXIT_FAILURE; 69 } 70 argc -= optind; 71 argv += optind; 72 73 switch (eflags & (VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE)) { 74 case VIS_HTTP1808|VIS_MIMESTYLE: 75 case VIS_HTTP1866|VIS_MIMESTYLE: 76 case VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE: 77 errx(EXIT_FAILURE, "Can't mix -m with -h and/or -H"); 78 default: 79 break; 80 } 81 82 if (*argv) 83 while (*argv) { 84 if ((fp = fopen(*argv, "r")) != NULL) 85 process(fp, *argv, eflags); 86 else 87 warn("%s", *argv); 88 argv++; 89 } 90 else 91 process(stdin, "<stdin>", eflags); 92 return EXIT_SUCCESS; 93 } 94 95 static void 96 process(FILE *fp, const char *filename, int eflags) 97 { 98 int offset = 0, c, ret; 99 int state = 0; 100 char outc; 101 102 while ((c = getc(fp)) != EOF) { 103 offset++; 104 again: 105 switch(ret = unvis(&outc, (char)c, &state, eflags)) { 106 case UNVIS_VALID: 107 putchar(outc); 108 break; 109 case UNVIS_VALIDPUSH: 110 putchar(outc); 111 goto again; 112 case UNVIS_SYNBAD: 113 warnx("%s: offset: %d: can't decode", filename, offset); 114 state = 0; 115 break; 116 case 0: 117 case UNVIS_NOCHAR: 118 break; 119 default: 120 errx(1, "bad return value (%d), can't happen", ret); 121 } 122 } 123 if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID) 124 putchar(outc); 125 } 126