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 35 static 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 42 static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD: src/usr.bin/unvis/unvis.c,v 1.5.2.1 2001/07/30 10:16:49 dd 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 54 void process __P((FILE *, char *)); 55 static void usage __P((void)); 56 57 int 58 main(argc, argv) 59 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 86 static void 87 usage() 88 { 89 fprintf(stderr, "usage: unvis [file ...]\n"); 90 exit(1); 91 } 92 93 void 94 process(fp, filename) 95 FILE *fp; 96 char *filename; 97 { 98 register int offset = 0, c, ret; 99 int state = 0; 100 char outc; 101 102 while ((c = getc(fp)) != EOF) { 103 offset++; 104 again: 105 switch(ret = unvis(&outc, (char)c, &state, 0)) { 106 case UNVIS_VALID: 107 putchar(outc); 108 break; 109 case UNVIS_VALIDPUSH: 110 putchar(outc); 111 goto again; 112 case UNVIS_SYNBAD: 113 warnx("%s: offset: %d: can't decode", filename, offset); 114 state = 0; 115 break; 116 case 0: 117 case UNVIS_NOCHAR: 118 break; 119 default: 120 errx(1, "bad return value (%d), can't happen", ret); 121 } 122 } 123 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 124 putchar(outc); 125 } 126