Contents of /trunk/mkinitrd-magellan/busybox/coreutils/df.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 3902 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 + 1024/2 ) / 1024; |
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 = 1024; |
42 | #endif |
43 | int status = EXIT_SUCCESS; |
44 | unsigned 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 | opt_complementary = "h-km:k-hm:m-hk"; |
53 | opt = getopt32(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 = 1024*1024; |
60 | disp_units_hdr = "1M-blocks"; |
61 | } |
62 | #else |
63 | opt = getopt32(argc, argv, "k"); |
64 | #endif |
65 | |
66 | 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 | mount_table = setmntent(bb_path_mtab_file, "r"); |
73 | if (!mount_table) { |
74 | bb_perror_msg_and_die(bb_path_mtab_file); |
75 | } |
76 | } |
77 | |
78 | do { |
79 | const char *device; |
80 | const char *mount_point; |
81 | |
82 | if (mount_table) { |
83 | mount_entry = getmntent(mount_table); |
84 | if (!mount_entry) { |
85 | endmntent(mount_table); |
86 | break; |
87 | } |
88 | } else { |
89 | mount_point = *argv++; |
90 | if (!mount_point) { |
91 | break; |
92 | } |
93 | mount_entry = find_mount_point(mount_point, bb_path_mtab_file); |
94 | if (!mount_entry) { |
95 | bb_error_msg("%s: can't find mount point", mount_point); |
96 | SET_ERROR: |
97 | status = EXIT_FAILURE; |
98 | continue; |
99 | } |
100 | } |
101 | |
102 | device = mount_entry->mnt_fsname; |
103 | mount_point = mount_entry->mnt_dir; |
104 | |
105 | if (statfs(mount_point, &s) != 0) { |
106 | bb_perror_msg("%s", mount_point); |
107 | goto SET_ERROR; |
108 | } |
109 | |
110 | if ((s.f_blocks > 0) || !mount_table){ |
111 | blocks_used = s.f_blocks - s.f_bfree; |
112 | blocks_percent_used = 0; |
113 | if (blocks_used + s.f_bavail) { |
114 | blocks_percent_used = (((long long) blocks_used) * 100 |
115 | + (blocks_used + s.f_bavail)/2 |
116 | ) / (blocks_used + s.f_bavail); |
117 | } |
118 | |
119 | if (strcmp(device, "rootfs") == 0) { |
120 | continue; |
121 | } else if (strcmp(device, "/dev/root") == 0) { |
122 | /* Adjusts device to be the real root device, |
123 | * or leaves device alone if it can't find it */ |
124 | device = find_block_device("/"); |
125 | if (!device) { |
126 | goto SET_ERROR; |
127 | } |
128 | } |
129 | |
130 | #ifdef CONFIG_FEATURE_HUMAN_READABLE |
131 | printf("%-20s %9s ", device, |
132 | make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr)); |
133 | |
134 | printf("%9s ", |
135 | make_human_readable_str( (s.f_blocks - s.f_bfree), |
136 | s.f_bsize, df_disp_hr)); |
137 | |
138 | printf("%9s %3ld%% %s\n", |
139 | make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr), |
140 | blocks_percent_used, mount_point); |
141 | #else |
142 | printf("%-20s %9ld %9ld %9ld %3ld%% %s\n", |
143 | device, |
144 | kscale(s.f_blocks, s.f_bsize), |
145 | kscale(s.f_blocks-s.f_bfree, s.f_bsize), |
146 | kscale(s.f_bavail, s.f_bsize), |
147 | blocks_percent_used, mount_point); |
148 | #endif |
149 | } |
150 | |
151 | } while (1); |
152 | |
153 | fflush_stdout_and_exit(status); |
154 | } |