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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/* vi: set sw=4 ts=4: */
/*
* Mini df implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* based on original code by (I think) Bruce Perens <bruce@pixar.com>.
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Size reduction. Removed floating point dependency. Added error checking
* on output. Output stats on 0-sized filesystems if specifically listed on
* the command line. Properly round *-blocks, Used, and Available quantities.
*
* Aug 28, 2008 Bernhard Reutner-Fischer
*
* Implement -P and -B; better coreutils compat; cleanup
*/
//usage:#define df_trivial_usage
//usage: "[-Pk"
//usage: IF_FEATURE_HUMAN_READABLE("mh")
//usage: IF_FEATURE_DF_FANCY("ai] [-B SIZE")
//usage: "] [FILESYSTEM]..."
//usage:#define df_full_usage "\n\n"
//usage: "Print filesystem usage statistics\n"
//usage: "\n -P POSIX output format"
//usage: "\n -k 1024-byte blocks (default)"
//usage: IF_FEATURE_HUMAN_READABLE(
//usage: "\n -m 1M-byte blocks"
//usage: "\n -h Human readable (e.g. 1K 243M 2G)"
//usage: )
//usage: IF_FEATURE_DF_FANCY(
//usage: "\n -a Show all filesystems"
//usage: "\n -i Inodes"
//usage: "\n -B SIZE Blocksize"
//usage: )
//usage:
//usage:#define df_example_usage
//usage: "$ df\n"
//usage: "Filesystem 1K-blocks Used Available Use% Mounted on\n"
//usage: "/dev/sda3 8690864 8553540 137324 98% /\n"
//usage: "/dev/sda1 64216 36364 27852 57% /boot\n"
//usage: "$ df /dev/sda3\n"
//usage: "Filesystem 1K-blocks Used Available Use% Mounted on\n"
//usage: "/dev/sda3 8690864 8553540 137324 98% /\n"
//usage: "$ POSIXLY_CORRECT=sure df /dev/sda3\n"
//usage: "Filesystem 512B-blocks Used Available Use% Mounted on\n"
//usage: "/dev/sda3 17381728 17107080 274648 98% /\n"
//usage: "$ POSIXLY_CORRECT=yep df -P /dev/sda3\n"
//usage: "Filesystem 512-blocks Used Available Capacity Mounted on\n"
//usage: "/dev/sda3 17381728 17107080 274648 98% /\n"
#include <mntent.h>
#include <sys/vfs.h>
#include "libbb.h"
#include "unicode.h"
#if !ENABLE_FEATURE_HUMAN_READABLE
static unsigned long kscale(unsigned long b, unsigned long bs)
{
return (b * (unsigned long long) bs + 1024/2) / 1024;
}
#endif
int df_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int df_main(int argc UNUSED_PARAM, char **argv)
{
unsigned long blocks_used;
unsigned blocks_percent_used;
unsigned long df_disp_hr = 1024;
int status = EXIT_SUCCESS;
unsigned opt;
FILE *mount_table;
struct mntent *mount_entry;
struct statfs s;
enum {
OPT_KILO = (1 << 0),
OPT_POSIX = (1 << 1),
OPT_ALL = (1 << 2) * ENABLE_FEATURE_DF_FANCY,
OPT_INODE = (1 << 3) * ENABLE_FEATURE_DF_FANCY,
OPT_BSIZE = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
OPT_HUMAN = (1 << (2 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
OPT_MEGA = (1 << (3 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
};
const char *disp_units_hdr = NULL;
char *chp;
init_unicode();
#if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY
opt_complementary = "k-mB:m-Bk:B-km";
#elif ENABLE_FEATURE_HUMAN_READABLE
opt_complementary = "k-m:m-k";
#endif
opt = getopt32(argv, "kP"
IF_FEATURE_DF_FANCY("aiB:")
IF_FEATURE_HUMAN_READABLE("hm")
IF_FEATURE_DF_FANCY(, &chp));
if (opt & OPT_MEGA)
df_disp_hr = 1024*1024;
if (opt & OPT_BSIZE)
df_disp_hr = xatoul_range(chp, 1, ULONG_MAX); /* disallow 0 */
/* From the manpage of df from coreutils-6.10:
Disk space is shown in 1K blocks by default, unless the environment
variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.
*/
if (getenv("POSIXLY_CORRECT")) /* TODO - a new libbb function? */
df_disp_hr = 512;
if (opt & OPT_HUMAN) {
df_disp_hr = 0;
disp_units_hdr = " Size";
}
if (opt & OPT_INODE)
disp_units_hdr = " Inodes";
if (disp_units_hdr == NULL) {
#if ENABLE_FEATURE_HUMAN_READABLE
disp_units_hdr = xasprintf("%s-blocks",
/* print df_disp_hr, show no fractionals,
* use suffixes if OPT_POSIX is set in opt */
make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX))
);
#else
disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
#endif
}
printf("Filesystem %-15sUsed Available %s Mounted on\n",
disp_units_hdr, (opt & OPT_POSIX) ? "Capacity" : "Use%");
mount_table = NULL;
argv += optind;
if (!argv[0]) {
mount_table = setmntent(bb_path_mtab_file, "r");
if (!mount_table)
bb_perror_msg_and_die(bb_path_mtab_file);
}
while (1) {
const char *device;
const char *mount_point;
if (mount_table) {
mount_entry = getmntent(mount_table);
if (!mount_entry) {
endmntent(mount_table);
break;
}
} else {
mount_point = *argv++;
if (!mount_point)
break;
mount_entry = find_mount_point(mount_point, 1);
if (!mount_entry) {
bb_error_msg("%s: can't find mount point", mount_point);
set_error:
status = EXIT_FAILURE;
continue;
}
}
device = mount_entry->mnt_fsname;
mount_point = mount_entry->mnt_dir;
if (statfs(mount_point, &s) != 0) {
bb_simple_perror_msg(mount_point);
goto set_error;
}
if ((s.f_blocks > 0) || !mount_table || (opt & OPT_ALL)) {
if (opt & OPT_INODE) {
s.f_blocks = s.f_files;
s.f_bavail = s.f_bfree = s.f_ffree;
s.f_bsize = 1;
if (df_disp_hr)
df_disp_hr = 1;
}
blocks_used = s.f_blocks - s.f_bfree;
blocks_percent_used = 0;
if (blocks_used + s.f_bavail) {
blocks_percent_used = (blocks_used * 100ULL
+ (blocks_used + s.f_bavail)/2
) / (blocks_used + s.f_bavail);
}
/* GNU coreutils 6.10 skips certain mounts, try to be compatible. */
if (ENABLE_FEATURE_SKIP_ROOTFS && strcmp(device, "rootfs") == 0)
continue;
#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY
if (strcmp(device, "/dev/root") == 0) {
/* Adjusts device to be the real root device,
* or leaves device alone if it can't find it */
device = find_block_device("/");
if (!device) {
goto set_error;
}
}
#endif
#if ENABLE_UNICODE_SUPPORT
{
uni_stat_t uni_stat;
char *uni_dev = unicode_conv_to_printable(&uni_stat, device);
if (uni_stat.unicode_width > 20) {
printf("%s\n%20s", uni_dev, "");
} else {
printf("%s%*s", uni_dev, 20 - (int)uni_stat.unicode_width, "");
}
free(uni_dev);
}
#else
if (printf("\n%-20s" + 1, device) > 20)
printf("\n%-20s", "");
#endif
#if ENABLE_FEATURE_HUMAN_READABLE
printf(" %9s ",
/* f_blocks x f_bsize / df_disp_hr, show one fractional,
* use suffixes if df_disp_hr == 0 */
make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
printf(" %9s " + 1,
/* EXPR x f_bsize / df_disp_hr, show one fractional,
* use suffixes if df_disp_hr == 0 */
make_human_readable_str((s.f_blocks - s.f_bfree),
s.f_bsize, df_disp_hr));
printf("%9s %3u%% %s\n",
/* f_bavail x f_bsize / df_disp_hr, show one fractional,
* use suffixes if df_disp_hr == 0 */
make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
blocks_percent_used, mount_point);
#else
printf(" %9lu %9lu %9lu %3u%% %s\n",
kscale(s.f_blocks, s.f_bsize),
kscale(s.f_blocks - s.f_bfree, s.f_bsize),
kscale(s.f_bavail, s.f_bsize),
blocks_percent_used, mount_point);
#endif
}
}
return status;
}
|
