1 /*- 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 char copyright[] = 36 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)unvis.c 5.1 (Berkeley) 6/1/90";*/ 42 static char rcsid[] = "$Id: unvis.c,v 1.2 1993/08/01 18:03:50 mycroft Exp $"; 43 #endif /* not lint */ 44 45 #include <stdio.h> 46 #include <vis.h> 47 48 char *Program; 49 #define usage() fprintf(stderr, "usage: %s %s\n", Program, USAGE) 50 #define USAGE "[file...]" 51 52 main(argc, argv) 53 char *argv[]; 54 { 55 FILE *fp; 56 extern char *optarg; 57 extern int optind; 58 int ch; 59 60 Program = argv[0]; 61 while ((ch = getopt(argc, argv, "")) != EOF) 62 switch((char)ch) { 63 case '?': 64 default: 65 usage(); 66 exit(1); 67 } 68 argc -= optind; 69 argv += optind; 70 71 if (*argv) 72 while (*argv) { 73 if ((fp=fopen(*argv, "r")) != NULL) 74 process(fp, *argv); 75 else 76 syserror("%s", *argv); 77 argv++; 78 } 79 else 80 process(stdin, "<stdin>"); 81 exit(0); 82 } 83 84 process(fp, filename) 85 FILE *fp; 86 char *filename; 87 { 88 register int offset = 0, c, ret; 89 int state = 0; 90 char outc; 91 92 while ((c = getc(fp)) != EOF) { 93 offset++; 94 again: 95 switch(ret = unvis(&outc, (char)c, &state, 0)) { 96 case UNVIS_VALID: 97 putchar(outc); 98 break; 99 case UNVIS_VALIDPUSH: 100 putchar(outc); 101 goto again; 102 case UNVIS_SYNBAD: 103 error("%s: offset: %d: can't decode", filename, offset); 104 state = 0; 105 break; 106 case 0: 107 case UNVIS_NOCHAR: 108 break; 109 default: 110 error("bad return value (%d), can't happen", ret); 111 exit(1); 112 } 113 } 114 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 115 putchar(outc); 116 } 117 118 #include <varargs.h> 119 120 error(va_alist) 121 va_dcl 122 { 123 char *fmt; 124 va_list ap; 125 extern errno; 126 127 fprintf(stderr, "%s: ", Program); 128 va_start(ap); 129 fmt = va_arg(ap, char *); 130 (void) vfprintf(stderr, fmt, ap); 131 va_end(ap); 132 fprintf(stderr, "\n"); 133 } 134 135 syserror(va_alist) 136 va_dcl 137 { 138 char *fmt; 139 va_list ap; 140 extern errno; 141 142 fprintf(stderr, "%s: ", Program); 143 va_start(ap); 144 fmt = va_arg(ap, char *); 145 (void) vfprintf(stderr, fmt, ap); 146 va_end(ap); 147 fprintf(stderr, ": %s\n", strerror(errno)); 148 } 149