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 * $FreeBSD: src/usr.bin/unvis/unvis.c,v 1.5.2.1 2001/07/30 10:16:49 dd Exp $ 32 * $DragonFly: src/usr.bin/unvis/unvis.c,v 1.5 2005/02/19 00:32:01 liamfoy Exp $ 33 */ 34 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 #include <vis.h> 40 41 static void process(FILE *, const char *); 42 static void usage(void); 43 44 int 45 main(int argc, char **argv) 46 { 47 FILE *fp; 48 int ch; 49 50 while ((ch = getopt(argc, argv, "")) != -1) 51 switch(ch) { 52 case '?': 53 default: 54 usage(); 55 } 56 argc -= optind; 57 argv += optind; 58 59 if (*argv) 60 while (*argv) { 61 if ((fp = fopen(*argv, "r")) != NULL) 62 process(fp, *argv); 63 else 64 warn("%s", *argv); 65 argv++; 66 } 67 else 68 process(stdin, "<stdin>"); 69 exit(0); 70 } 71 72 static void 73 usage(void) 74 { 75 fprintf(stderr, "usage: unvis [file ...]\n"); 76 exit(1); 77 } 78 79 static void 80 process(FILE *fp, const char *filename) 81 { 82 int offset = 0, c, ret; 83 int state = 0; 84 char outc; 85 86 while ((c = getc(fp)) != EOF) { 87 offset++; 88 again: 89 switch(ret = unvis(&outc, c, &state, 0)) { 90 case UNVIS_VALID: 91 putchar(outc); 92 break; 93 case UNVIS_VALIDPUSH: 94 putchar(outc); 95 goto again; 96 case UNVIS_SYNBAD: 97 warnx("%s: offset: %d: can't decode", filename, offset); 98 state = 0; 99 break; 100 case 0: 101 case UNVIS_NOCHAR: 102 break; 103 default: 104 errx(1, "bad return value (%d), can't happen", ret); 105 } 106 } 107 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 108 putchar(outc); 109 } 110