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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1989, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41#if 0 42static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; 43#endif 44static const char rcsid[] = 45 "$FreeBSD: src/usr.bin/unvis/unvis.c,v 1.9 2002/09/04 23:29:08 dwmalone Exp $"; 46#endif /* not lint */ 47 48#include <err.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <unistd.h> 52#include <vis.h> 53#include <sysexits.h> 54 55void process(FILE *, const char *); 56static void usage(void); 57 58int 59main(int argc, char *argv[]) 60{ 61 FILE *fp; 62 int ch; 63 64 while ((ch = getopt(argc, argv, "")) != -1) 65 switch((char)ch) { 66 case '?': 67 default: 68 usage(); 69 } 70 argc -= optind; 71 argv += optind; 72 73 if (*argv) 74 while (*argv) { 75 if ((fp=fopen(*argv, "r")) != NULL) 76 process(fp, *argv); 77 else 78 warn("%s", *argv); 79 argv++; 80 } 81 else 82 process(stdin, "<stdin>"); 83 exit(0); 84} 85 86static void 87usage(void) 88{ 89 fprintf(stderr, "usage: unvis [file ...]\n"); 90 exit(1); 91} 92 93void 94process(FILE *fp, const char *filename) 95{ 96 int offset = 0, c, ret; 97 int state = 0; 98 char outc; 99 100 while ((c = getc(fp)) != EOF) { 101 offset++; 102 again: 103 switch(ret = unvis(&outc, (char)c, &state, 0)) { 104 case UNVIS_VALID: 105 putchar(outc); 106 break; 107 case UNVIS_VALIDPUSH: 108 putchar(outc); 109 goto again; 110 case UNVIS_SYNBAD: 111 warnx("%s: offset: %d: can't decode", filename, offset); 112 state = 0; 113 break; 114 case 0: 115 case UNVIS_NOCHAR: 116 break; 117 default: 118 errx(1, "bad return value (%d), can't happen", ret); 119 } 120 } 121 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 122 putchar(outc); 123 124 if (ferror(fp)) 125 errx(EX_IOERR, "Error reading %s", fp); 126} 127