1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* xcase - change uppercase characters to lowercase or vice versa. */
/* Copyright (C) 2008,2009 Free Software Foundation, Inc.
This file is part of GNU Bash.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <ctype.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "bashansi.h"
#include <errno.h>
#ifndef errno
#include <errno.h>
#endif
#define LOWER 1
#define UPPER 2
int
main(ac, av)
int ac;
char **av;
{
int c, x;
int op;
FILE *inf;
op = 0;
while ((c = getopt(ac, av, "lnu")) != EOF) {
switch (c) {
case 'n':
setbuf (stdout, (char *)NULL);
break;
case 'u':
op = UPPER;
break;
case 'l':
op = LOWER;
break;
default:
fprintf(stderr, "casemod: usage: casemod [-lnu] [file]\n");
exit(2);
}
}
av += optind;
ac -= optind;
if (av[0] && (av[0][0] != '-' || av[0][1])) {
inf = fopen(av[0], "r");
if (inf == 0) {
fprintf(stderr, "casemod: %s: cannot open: %s\n", av[0], strerror(errno));
exit(1);
}
} else
inf = stdin;
while ((c = getc(inf)) != EOF) {
switch (op) {
case UPPER:
x = islower(c) ? toupper(c) : c;
break;
case LOWER:
x = isupper(c) ? tolower(c) : c;
break;
default:
x = c;
break;
}
putchar(x);
}
exit(0);
}
|
