1 |
|
|
/* $OpenBSD: unvis.c,v 1.14 2015/10/09 01:37:09 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 |
|
|
#include <err.h> |
33 |
|
|
#include <stdio.h> |
34 |
|
|
#include <stdlib.h> |
35 |
|
|
#include <unistd.h> |
36 |
|
|
#include <vis.h> |
37 |
|
|
|
38 |
|
|
void process(FILE *fp, const char *filename); |
39 |
|
|
|
40 |
|
|
int |
41 |
|
|
main(int argc, char *argv[]) |
42 |
|
|
{ |
43 |
|
|
FILE *fp; |
44 |
|
|
int ch; |
45 |
|
|
|
46 |
|
|
if (pledge("stdio rpath flock cpath wpath", NULL) == -1) |
47 |
|
|
err(1, "pledge"); |
48 |
|
|
|
49 |
|
|
while ((ch = getopt(argc, argv, "")) != -1) |
50 |
|
|
switch(ch) { |
51 |
|
|
case '?': |
52 |
|
|
default: |
53 |
|
|
(void) fprintf(stderr, "usage: unvis [file ...]\n"); |
54 |
|
|
exit(1); |
55 |
|
|
} |
56 |
|
|
argc -= optind; |
57 |
|
|
argv += optind; |
58 |
|
|
|
59 |
|
|
if (*argv) |
60 |
|
|
while (*argv) { |
61 |
|
|
if ((fp=fopen(*argv, "r")) != NULL) { |
62 |
|
|
process(fp, *argv); |
63 |
|
|
fclose(fp); |
64 |
|
|
} else |
65 |
|
|
warn("%s", *argv); |
66 |
|
|
argv++; |
67 |
|
|
} |
68 |
|
|
else { |
69 |
|
|
if (pledge("stdio flock rpath cpath wpath", NULL) == -1) |
70 |
|
|
err(1, "pledge"); |
71 |
|
|
|
72 |
|
|
process(stdin, "<stdin>"); |
73 |
|
|
} |
74 |
|
|
exit(0); |
75 |
|
|
} |
76 |
|
|
|
77 |
|
|
void |
78 |
|
|
process(FILE *fp, const char *filename) |
79 |
|
|
{ |
80 |
|
|
int offset = 0, c, ret; |
81 |
|
|
int state = 0; |
82 |
|
|
char outc; |
83 |
|
|
|
84 |
|
|
while ((c = getc(fp)) != EOF) { |
85 |
|
|
offset++; |
86 |
|
|
again: |
87 |
|
|
switch(ret = unvis(&outc, (char)c, &state, 0)) { |
88 |
|
|
case UNVIS_VALID: |
89 |
|
|
putchar(outc); |
90 |
|
|
break; |
91 |
|
|
case UNVIS_VALIDPUSH: |
92 |
|
|
putchar(outc); |
93 |
|
|
goto again; |
94 |
|
|
case UNVIS_SYNBAD: |
95 |
|
|
warnx("%s: offset: %d: can't decode", filename, offset); |
96 |
|
|
state = 0; |
97 |
|
|
break; |
98 |
|
|
case 0: |
99 |
|
|
case UNVIS_NOCHAR: |
100 |
|
|
break; |
101 |
|
|
default: |
102 |
|
|
errx(1, "bad return value (%d), can't happen", ret); |
103 |
|
|
/* NOTREACHED */ |
104 |
|
|
} |
105 |
|
|
} |
106 |
|
|
if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) |
107 |
|
|
putchar(outc); |
108 |
|
|
} |