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 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 char rcsid[] = "$Id: unvis.c,v 1.3 1994/12/06 07:36:10 jtc Exp $"; 45 #endif /* not lint */ 46 47 #include <stdio.h> 48 #include <vis.h> 49 50 char *Program; 51 #define usage() fprintf(stderr, "usage: %s %s\n", Program, USAGE) 52 #define USAGE "[file...]" 53 54 main(argc, argv) 55 char *argv[]; 56 { 57 FILE *fp; 58 extern char *optarg; 59 extern int optind; 60 int ch; 61 62 Program = argv[0]; 63 while ((ch = getopt(argc, argv, "")) != EOF) 64 switch((char)ch) { 65 case '?': 66 default: 67 usage(); 68 exit(1); 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 syserror("%s", *argv); 79 argv++; 80 } 81 else 82 process(stdin, "<stdin>"); 83 exit(0); 84 } 85 86 process(fp, filename) 87 FILE *fp; 88 char *filename; 89 { 90 register int offset = 0, c, ret; 91 int state = 0; 92 char outc; 93 94 while ((c = getc(fp)) != EOF) { 95 offset++; 96 again: 97 switch(ret = unvis(&outc, (char)c, &state, 0)) { 98 case UNVIS_VALID: 99 putchar(outc); 100 break; 101 case UNVIS_VALIDPUSH: 102 putchar(outc); 103 goto again; 104 case UNVIS_SYNBAD: 105 error("%s: offset: %d: can't decode", filename, offset); 106 state = 0; 107 break; 108 case 0: 109 case UNVIS_NOCHAR: 110 break; 111 default: 112 error("bad return value (%d), can't happen", ret); 113 exit(1); 114 } 115 } 116 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 117 putchar(outc); 118 } 119 120 #include <varargs.h> 121 122 error(va_alist) 123 va_dcl 124 { 125 char *fmt; 126 va_list ap; 127 extern errno; 128 129 fprintf(stderr, "%s: ", Program); 130 va_start(ap); 131 fmt = va_arg(ap, char *); 132 (void) vfprintf(stderr, fmt, ap); 133 va_end(ap); 134 fprintf(stderr, "\n"); 135 } 136 137 syserror(va_alist) 138 va_dcl 139 { 140 char *fmt; 141 va_list ap; 142 extern errno; 143 144 fprintf(stderr, "%s: ", Program); 145 va_start(ap); 146 fmt = va_arg(ap, char *); 147 (void) vfprintf(stderr, fmt, ap); 148 va_end(ap); 149 fprintf(stderr, ": %s\n", strerror(errno)); 150 } 151