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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Mini du implementation for busybox
*
*
* Copyright (C) 1999 by Lineo, inc.
* Written by John Beppu <beppu@lineo.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <stdio.h>
#include <errno.h>
#if 0
#include <unistd.h>
#include <sys/stat.h>
#endif
static const char du_usage[] =
"Usage: du [OPTION]... [FILE]...\n";
typedef void (Display)(size_t, char *);
static void
print(size_t size, char *filename)
{
fprintf(stdout, "%-7d %s\n", (size >> 1), filename);
}
/* tiny recursive du */
static size_t
du(char *filename)
{
struct stat statbuf;
size_t sum;
if ((lstat(filename, &statbuf)) != 0) {
fprintf(stdout, "du: %s: %s\n", filename, strerror(errno));
return 0;
}
sum = statbuf.st_blocks;
if (S_ISDIR(statbuf.st_mode)) {
DIR *dir;
struct dirent *entry;
dir = opendir(filename);
if (!dir) { return 0; }
while ((entry = readdir(dir))) {
char newfile[512];
char *name = entry->d_name;
if ( (strcmp(name, "..") == 0)
|| (strcmp(name, ".") == 0))
{ continue; }
sprintf(newfile, "%s/%s", filename, name);
sum += du(newfile);
}
closedir(dir);
print(sum, filename);
}
return sum;
}
int
du_main(int argc, char **argv)
{
int i;
char opt;
/* parse argv[] */
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
opt = argv[i][1];
switch (opt) {
case 's':
break;
case 'h':
usage(du_usage);
break;
default:
fprintf(stderr, "du: invalid option -- %c\n", opt);
usage(du_usage);
}
} else {
break;
}
}
/* go through remaining args (if any) */
if (i >= argc) {
du(".");
} else {
int sum;
for ( ; i < argc; i++) {
sum = du(argv[i]) >> 1;
if (sum) printf("%-7d %s\n", sum, argv[i]);
}
}
exit(0);
}
/* $Id: du.c,v 1.5 1999/12/10 15:23:47 beppu Exp $ */
|
