1 /* $OpenBSD: unvis.c,v 1.9 2009/10/27 23:59:46 deraadt 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 <stdio.h> 33 #include <stdlib.h> 34 #include <err.h> 35 #include <vis.h> 36 37 void process(FILE *fp, const char *filename); 38 39 int 40 main(int argc, char *argv[]) 41 { 42 FILE *fp; 43 int ch; 44 45 while ((ch = getopt(argc, argv, "")) != -1) 46 switch((char)ch) { 47 case '?': 48 default: 49 (void) fprintf(stderr, "usage: unvis [file ...]\n"); 50 exit(1); 51 } 52 argc -= optind; 53 argv += optind; 54 55 if (*argv) 56 while (*argv) { 57 if ((fp=fopen(*argv, "r")) != NULL) 58 process(fp, *argv); 59 else 60 warn("%s", *argv); 61 argv++; 62 } 63 else 64 process(stdin, "<stdin>"); 65 exit(0); 66 } 67 68 void 69 process(FILE *fp, const char *filename) 70 { 71 int offset = 0, c, ret; 72 int state = 0; 73 char outc; 74 75 while ((c = getc(fp)) != EOF) { 76 offset++; 77 again: 78 switch(ret = unvis(&outc, (char)c, &state, 0)) { 79 case UNVIS_VALID: 80 putchar(outc); 81 break; 82 case UNVIS_VALIDPUSH: 83 putchar(outc); 84 goto again; 85 case UNVIS_SYNBAD: 86 warnx("%s: offset: %d: can't decode", filename, offset); 87 state = 0; 88 break; 89 case 0: 90 case UNVIS_NOCHAR: 91 break; 92 default: 93 errx(1, "bad return value (%d), can't happen", ret); 94 /* NOTREACHED */ 95 } 96 } 97 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 98 putchar(outc); 99 } 100