1 /* vi: set sw=4 ts=4: */
3 * Mini df implementation for busybox
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
25 /* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
27 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
29 * Size reduction. Removed floating point dependency. Added error checking
30 * on output. Output stats on 0-sized filesystems if specifically listed on
31 * the command line. Properly round *-blocks, Used, and Available quantities.
42 #ifndef CONFIG_FEATURE_HUMAN_READABLE
43 static long kscale(long b, long bs)
45 return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE;
49 extern int df_main(int argc, char **argv)
52 long blocks_percent_used;
53 #ifdef CONFIG_FEATURE_HUMAN_READABLE
54 unsigned long df_disp_hr = KILOBYTE;
56 int status = EXIT_SUCCESS;
59 struct mntent *mount_entry;
61 static const char hdr_1k[] = "1k-blocks"; /* default display is kilobytes */
62 const char *disp_units_hdr = hdr_1k;
64 #ifdef CONFIG_FEATURE_HUMAN_READABLE
65 bb_opt_complementally = "h-km:k-hm:m-hk";
66 opt = bb_getopt_ulflags(argc, argv, "hmk");
69 disp_units_hdr = " Size";
72 df_disp_hr = MEGABYTE;
73 disp_units_hdr = "1M-blocks";
76 opt = bb_getopt_ulflags(argc, argv, "k");
79 bb_printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
85 if (!(mount_table = setmntent(bb_path_mtab_file, "r"))) {
86 bb_perror_msg_and_die(bb_path_mtab_file);
92 const char *mount_point;
95 if (!(mount_entry = getmntent(mount_table))) {
96 endmntent(mount_table);
100 if (!(mount_point = *argv++)) {
103 if (!(mount_entry = find_mount_point(mount_point, bb_path_mtab_file))) {
104 bb_error_msg("%s: can't find mount point.", mount_point);
106 status = EXIT_FAILURE;
111 device = mount_entry->mnt_fsname;
112 mount_point = mount_entry->mnt_dir;
114 if (statfs(mount_point, &s) != 0) {
115 bb_perror_msg("%s", mount_point);
119 if ((s.f_blocks > 0) || !mount_table){
120 blocks_used = s.f_blocks - s.f_bfree;
121 blocks_percent_used = 0;
122 if (blocks_used + s.f_bavail) {
123 blocks_percent_used = (((long long) blocks_used) * 100
124 + (blocks_used + s.f_bavail)/2
125 ) / (blocks_used + s.f_bavail);
128 if (strcmp(device, "rootfs") == 0) {
130 } else if (strcmp(device, "/dev/root") == 0) {
131 /* Adjusts device to be the real root device,
132 * or leaves device alone if it can't find it */
133 if ((device = find_block_device("/")) == NULL) {
138 #ifdef CONFIG_FEATURE_HUMAN_READABLE
139 bb_printf("%-20s %9s ", device,
140 make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
143 make_human_readable_str( (s.f_blocks - s.f_bfree),
144 s.f_bsize, df_disp_hr));
146 bb_printf("%9s %3ld%% %s\n",
147 make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
148 blocks_percent_used, mount_point);
150 bb_printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
152 kscale(s.f_blocks, s.f_bsize),
153 kscale(s.f_blocks-s.f_bfree, s.f_bsize),
154 kscale(s.f_bavail, s.f_bsize),
155 blocks_percent_used, mount_point);
161 bb_fflush_stdout_and_exit(status);
166 c-file-style: "linux"