1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * Mini df implementation for busybox
|
---|
4 | *
|
---|
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
---|
6 | * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
|
---|
7 | *
|
---|
8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
9 | */
|
---|
10 |
|
---|
11 | /* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
|
---|
12 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
|
---|
13 |
|
---|
14 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
|
---|
15 | *
|
---|
16 | * Size reduction. Removed floating point dependency. Added error checking
|
---|
17 | * on output. Output stats on 0-sized filesystems if specifically listed on
|
---|
18 | * the command line. Properly round *-blocks, Used, and Available quantities.
|
---|
19 | */
|
---|
20 |
|
---|
21 | #include <stdio.h>
|
---|
22 | #include <stdlib.h>
|
---|
23 | #include <string.h>
|
---|
24 | #include <unistd.h>
|
---|
25 | #include <mntent.h>
|
---|
26 | #include <sys/vfs.h>
|
---|
27 | #include "busybox.h"
|
---|
28 |
|
---|
29 | #ifndef CONFIG_FEATURE_HUMAN_READABLE
|
---|
30 | static long kscale(long b, long bs)
|
---|
31 | {
|
---|
32 | return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE;
|
---|
33 | }
|
---|
34 | #endif
|
---|
35 |
|
---|
36 | int df_main(int argc, char **argv)
|
---|
37 | {
|
---|
38 | long blocks_used;
|
---|
39 | long blocks_percent_used;
|
---|
40 | #ifdef CONFIG_FEATURE_HUMAN_READABLE
|
---|
41 | unsigned long df_disp_hr = KILOBYTE;
|
---|
42 | #endif
|
---|
43 | int status = EXIT_SUCCESS;
|
---|
44 | unsigned long opt;
|
---|
45 | FILE *mount_table;
|
---|
46 | struct mntent *mount_entry;
|
---|
47 | struct statfs s;
|
---|
48 | static const char hdr_1k[] = "1k-blocks"; /* default display is kilobytes */
|
---|
49 | const char *disp_units_hdr = hdr_1k;
|
---|
50 |
|
---|
51 | #ifdef CONFIG_FEATURE_HUMAN_READABLE
|
---|
52 | bb_opt_complementally = "h-km:k-hm:m-hk";
|
---|
53 | opt = bb_getopt_ulflags(argc, argv, "hmk");
|
---|
54 | if(opt & 1) {
|
---|
55 | df_disp_hr = 0;
|
---|
56 | disp_units_hdr = " Size";
|
---|
57 | }
|
---|
58 | if(opt & 2) {
|
---|
59 | df_disp_hr = MEGABYTE;
|
---|
60 | disp_units_hdr = "1M-blocks";
|
---|
61 | }
|
---|
62 | #else
|
---|
63 | opt = bb_getopt_ulflags(argc, argv, "k");
|
---|
64 | #endif
|
---|
65 |
|
---|
66 | bb_printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
|
---|
67 | "", disp_units_hdr);
|
---|
68 |
|
---|
69 | mount_table = NULL;
|
---|
70 | argv += optind;
|
---|
71 | if (optind >= argc) {
|
---|
72 | if (!(mount_table = setmntent(bb_path_mtab_file, "r"))) {
|
---|
73 | bb_perror_msg_and_die(bb_path_mtab_file);
|
---|
74 | }
|
---|
75 | }
|
---|
76 |
|
---|
77 | do {
|
---|
78 | const char *device;
|
---|
79 | const char *mount_point;
|
---|
80 |
|
---|
81 | if (mount_table) {
|
---|
82 | if (!(mount_entry = getmntent(mount_table))) {
|
---|
83 | endmntent(mount_table);
|
---|
84 | break;
|
---|
85 | }
|
---|
86 | } else {
|
---|
87 | if (!(mount_point = *argv++)) {
|
---|
88 | break;
|
---|
89 | }
|
---|
90 | if (!(mount_entry = find_mount_point(mount_point, bb_path_mtab_file))) {
|
---|
91 | bb_error_msg("%s: can't find mount point.", mount_point);
|
---|
92 | SET_ERROR:
|
---|
93 | status = EXIT_FAILURE;
|
---|
94 | continue;
|
---|
95 | }
|
---|
96 | }
|
---|
97 |
|
---|
98 | device = mount_entry->mnt_fsname;
|
---|
99 | mount_point = mount_entry->mnt_dir;
|
---|
100 |
|
---|
101 | if (statfs(mount_point, &s) != 0) {
|
---|
102 | bb_perror_msg("%s", mount_point);
|
---|
103 | goto SET_ERROR;
|
---|
104 | }
|
---|
105 |
|
---|
106 | if ((s.f_blocks > 0) || !mount_table){
|
---|
107 | blocks_used = s.f_blocks - s.f_bfree;
|
---|
108 | blocks_percent_used = 0;
|
---|
109 | if (blocks_used + s.f_bavail) {
|
---|
110 | blocks_percent_used = (((long long) blocks_used) * 100
|
---|
111 | + (blocks_used + s.f_bavail)/2
|
---|
112 | ) / (blocks_used + s.f_bavail);
|
---|
113 | }
|
---|
114 |
|
---|
115 | if (strcmp(device, "rootfs") == 0) {
|
---|
116 | continue;
|
---|
117 | } else if (strcmp(device, "/dev/root") == 0) {
|
---|
118 | /* Adjusts device to be the real root device,
|
---|
119 | * or leaves device alone if it can't find it */
|
---|
120 | if ((device = find_block_device("/")) == NULL) {
|
---|
121 | goto SET_ERROR;
|
---|
122 | }
|
---|
123 | }
|
---|
124 |
|
---|
125 | #ifdef CONFIG_FEATURE_HUMAN_READABLE
|
---|
126 | bb_printf("%-20s %9s ", device,
|
---|
127 | make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
|
---|
128 |
|
---|
129 | bb_printf("%9s ",
|
---|
130 | make_human_readable_str( (s.f_blocks - s.f_bfree),
|
---|
131 | s.f_bsize, df_disp_hr));
|
---|
132 |
|
---|
133 | bb_printf("%9s %3ld%% %s\n",
|
---|
134 | make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
|
---|
135 | blocks_percent_used, mount_point);
|
---|
136 | #else
|
---|
137 | bb_printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
|
---|
138 | device,
|
---|
139 | kscale(s.f_blocks, s.f_bsize),
|
---|
140 | kscale(s.f_blocks-s.f_bfree, s.f_bsize),
|
---|
141 | kscale(s.f_bavail, s.f_bsize),
|
---|
142 | blocks_percent_used, mount_point);
|
---|
143 | #endif
|
---|
144 | }
|
---|
145 |
|
---|
146 | } while (1);
|
---|
147 |
|
---|
148 | bb_fflush_stdout_and_exit(status);
|
---|
149 | }
|
---|