1 /* $NetBSD: unvis.c,v 1.12 2009/02/10 23:06:31 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 1.12 2009/02/10 23:06:31 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 int eflags; 52 53 static void process(FILE *fp, const char *filename); 54 55 int 56 main(int argc, char *argv[]) 57 { 58 FILE *fp; 59 int ch; 60 61 setprogname(argv[0]); 62 while ((ch = getopt(argc, argv, "hm")) != -1) 63 switch((char)ch) { 64 case 'h': 65 eflags |= VIS_HTTPSTYLE; 66 break; 67 case 'm': 68 eflags |= VIS_MIMESTYLE; 69 break; 70 case '?': 71 default: 72 (void)fprintf(stderr, 73 "Usage: %s [-h|-m] [file...]\n", getprogname()); 74 return 1; 75 } 76 argc -= optind; 77 argv += optind; 78 79 if ((eflags & (VIS_HTTPSTYLE|VIS_MIMESTYLE)) == 80 (VIS_HTTPSTYLE|VIS_MIMESTYLE)) 81 errx(1, "Can't specify -m and -h at the same time"); 82 83 if (*argv) 84 while (*argv) { 85 if ((fp = fopen(*argv, "r")) != NULL) 86 process(fp, *argv); 87 else 88 warn("%s", *argv); 89 argv++; 90 } 91 else 92 process(stdin, "<stdin>"); 93 return 0; 94 } 95 96 static void 97 process(FILE *fp, const char *filename) 98 { 99 int offset = 0, c, ret; 100 int state = 0; 101 char outc; 102 103 while ((c = getc(fp)) != EOF) { 104 offset++; 105 again: 106 switch(ret = unvis(&outc, (char)c, &state, eflags)) { 107 case UNVIS_VALID: 108 (void)putchar(outc); 109 break; 110 case UNVIS_VALIDPUSH: 111 (void)putchar(outc); 112 goto again; 113 case UNVIS_SYNBAD: 114 warnx("%s: offset: %d: can't decode", filename, offset); 115 state = 0; 116 break; 117 case 0: 118 case UNVIS_NOCHAR: 119 break; 120 default: 121 errx(1, "bad return value (%d), can't happen", ret); 122 /* NOTREACHED */ 123 } 124 } 125 if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID) 126 (void)putchar(outc); 127 } 128