1 /* $NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1989, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 __RCSID("$NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $"); 43 #endif /* not lint */ 44 45 #include <err.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include <vis.h> 50 51 static void process(FILE *, const char *, int); 52 53 int 54 main(int argc, char *argv[]) 55 { 56 FILE *fp; 57 int ch, eflags = 0; 58 59 setprogname(argv[0]); 60 while ((ch = getopt(argc, argv, "eHhm")) != -1) 61 switch((char)ch) { 62 case 'e': 63 eflags |= VIS_NOESCAPE; 64 break; 65 case 'H': 66 eflags |= VIS_HTTP1866; 67 break; 68 case 'h': 69 eflags |= VIS_HTTP1808; 70 break; 71 case 'm': 72 eflags |= VIS_MIMESTYLE; 73 break; 74 case '?': 75 default: 76 (void)fprintf(stderr, 77 "Usage: %s [-e] [-Hh | -m] [file...]\n", 78 getprogname()); 79 return EXIT_FAILURE; 80 } 81 argc -= optind; 82 argv += optind; 83 84 switch (eflags & (VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE)) { 85 case VIS_HTTP1808|VIS_MIMESTYLE: 86 case VIS_HTTP1866|VIS_MIMESTYLE: 87 case VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE: 88 errx(EXIT_FAILURE, "Can't mix -m with -h and/or -H"); 89 /*NOTREACHED*/ 90 default: 91 break; 92 } 93 94 if (*argv) 95 while (*argv) { 96 if ((fp = fopen(*argv, "r")) != NULL) 97 process(fp, *argv, eflags); 98 else 99 warn("%s", *argv); 100 argv++; 101 } 102 else 103 process(stdin, "<stdin>", eflags); 104 return EXIT_SUCCESS; 105 } 106 107 static void 108 process(FILE *fp, const char *filename, int eflags) 109 { 110 int offset = 0, c, ret; 111 int state = 0; 112 char outc; 113 114 while ((c = getc(fp)) != EOF) { 115 offset++; 116 again: 117 switch(ret = unvis(&outc, (char)c, &state, eflags)) { 118 case UNVIS_VALID: 119 (void)putchar(outc); 120 break; 121 case UNVIS_VALIDPUSH: 122 (void)putchar(outc); 123 goto again; 124 case UNVIS_SYNBAD: 125 warnx("%s: offset: %d: can't decode", filename, offset); 126 state = 0; 127 break; 128 case 0: 129 case UNVIS_NOCHAR: 130 break; 131 default: 132 errx(1, "bad return value (%d), can't happen", ret); 133 /* NOTREACHED */ 134 } 135 } 136 if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID) 137 (void)putchar(outc); 138 } 139