1 /* vi: set sw=4 ts=4: */
3 * Mini df implementation for busybox
5 * Copyright (C) 1999,2000 by Lineo, inc.
6 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
7 * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 static const char df_usage[] = "df [filesystem ...]\n\n"
32 "Print the filesystem space used and space available.\n";
34 extern const char mtab_file[]; /* Defined in utility.c */
36 static int df(char *device, const char *mountPoint)
40 long blocks_percent_used;
42 if (statfs(mountPoint, &s) != 0) {
48 blocks_used = s.f_blocks - s.f_bfree;
49 blocks_percent_used = (long)
50 (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
51 /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
52 if (strcmp(device, "/dev/root") == 0) {
53 /* Adjusts device to be the real root device,
54 * or leaves device alone if it can't find it */
55 find_real_root_device_name( device);
57 printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
59 (long) (s.f_blocks * (s.f_bsize / 1024.0)),
60 (long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)),
61 (long) (s.f_bavail * (s.f_bsize / 1024.0)),
62 blocks_percent_used, mountPoint);
69 extern int df_main(int argc, char **argv)
71 printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
72 "1k-blocks", "Used", "Available", "Use%", "Mounted on");
75 struct mntent *mountEntry;
78 if (**(argv + 1) == '-') {
82 if ((mountEntry = findMountPoint(argv[1], mtab_file)) == 0) {
83 fprintf(stderr, "%s: can't find mount point.\n", argv[1]);
86 status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
95 struct mntent *mountEntry;
97 mountTable = setmntent(mtab_file, "r");
98 if (mountTable == 0) {
103 while ((mountEntry = getmntent(mountTable))) {
104 df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
106 endmntent(mountTable);
114 c-file-style: "linux"