1 /* $OpenBSD: unvis.c,v 1.7 2003/06/10 22:20:53 deraadt Exp $ */
2
3 /*-
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 static char copyright[] =
34 "@(#) Copyright (c) 1989, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93";
41 #endif
42 static char rcsid[] = "$OpenBSD: unvis.c,v 1.7 2003/06/10 22:20:53 deraadt Exp $";
43 #endif /* not lint */
44
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <err.h>
48 #include <vis.h>
49
50 void process(FILE *fp, const char *filename);
51
52 int
main(int argc,char * argv[])53 main(int argc, char *argv[])
54 {
55 FILE *fp;
56 int ch;
57
58 while ((ch = getopt(argc, argv, "")) != -1)
59 switch((char)ch) {
60 case '?':
61 default:
62 (void) fprintf(stderr, "usage: unvis [file...]\n");
63 exit(1);
64 }
65 argc -= optind;
66 argv += optind;
67
68 if (*argv)
69 while (*argv) {
70 if ((fp=fopen(*argv, "r")) != NULL)
71 process(fp, *argv);
72 else
73 warn("%s", *argv);
74 argv++;
75 }
76 else
77 process(stdin, "<stdin>");
78 exit(0);
79 }
80
81 void
process(FILE * fp,const char * filename)82 process(FILE *fp, const char *filename)
83 {
84 int offset = 0, c, ret;
85 int state = 0;
86 char outc;
87
88 while ((c = getc(fp)) != EOF) {
89 offset++;
90 again:
91 switch(ret = unvis(&outc, (char)c, &state, 0)) {
92 case UNVIS_VALID:
93 putchar(outc);
94 break;
95 case UNVIS_VALIDPUSH:
96 putchar(outc);
97 goto again;
98 case UNVIS_SYNBAD:
99 warnx("%s: offset: %d: can't decode", filename, offset);
100 state = 0;
101 break;
102 case 0:
103 case UNVIS_NOCHAR:
104 break;
105 default:
106 errx(1, "bad return value (%d), can't happen", ret);
107 /* NOTREACHED */
108 }
109 }
110 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
111 putchar(outc);
112 }
113