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 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)unvis.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/unvis/unvis.c,v 1.5.2.1 2001/07/30 10:16:49 dd Exp $ 36 * $DragonFly: src/usr.bin/unvis/unvis.c,v 1.3 2003/10/04 20:36:54 hmp Exp $ 37 */ 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 #include <vis.h> 44 45 void process(FILE *, char *); 46 static void usage(void); 47 48 int 49 main(int argc, char **argv) 50 { 51 FILE *fp; 52 int ch; 53 54 while ((ch = getopt(argc, argv, "")) != -1) 55 switch((char)ch) { 56 case '?': 57 default: 58 usage(); 59 } 60 argc -= optind; 61 argv += optind; 62 63 if (*argv) 64 while (*argv) { 65 if ((fp=fopen(*argv, "r")) != NULL) 66 process(fp, *argv); 67 else 68 warn("%s", *argv); 69 argv++; 70 } 71 else 72 process(stdin, "<stdin>"); 73 exit(0); 74 } 75 76 static void 77 usage(void) 78 { 79 fprintf(stderr, "usage: unvis [file ...]\n"); 80 exit(1); 81 } 82 83 void 84 process(FILE *fp, char *filename) 85 { 86 register int offset = 0, c, ret; 87 int state = 0; 88 char outc; 89 90 while ((c = getc(fp)) != EOF) { 91 offset++; 92 again: 93 switch(ret = unvis(&outc, (char)c, &state, 0)) { 94 case UNVIS_VALID: 95 putchar(outc); 96 break; 97 case UNVIS_VALIDPUSH: 98 putchar(outc); 99 goto again; 100 case UNVIS_SYNBAD: 101 warnx("%s: offset: %d: can't decode", filename, offset); 102 state = 0; 103 break; 104 case 0: 105 case UNVIS_NOCHAR: 106 break; 107 default: 108 errx(1, "bad return value (%d), can't happen", ret); 109 } 110 } 111 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 112 putchar(outc); 113 } 114