2 * Mini df implementation for busybox
4 * Copyright (C) 1999 by Lineo, inc.
5 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.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
31 static const char df_usage[] = "df [filesystem ...]\n"
32 "\n" "\tPrint 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;
41 struct fstab* fstabItem;
43 if (statfs(mountPoint, &s) != 0) {
49 blocks_used = s.f_blocks - s.f_bfree;
50 blocks_percent_used = (long)
51 (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
52 /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
53 if (strcmp (device, "/dev/root") == 0) {
54 fstabItem = getfsfile ("/");
55 if (fstabItem != NULL)
56 device = fstabItem->fs_spec;
58 printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
60 (long) (s.f_blocks * (s.f_bsize / 1024.0)),
61 (long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)),
62 (long) (s.f_bavail * (s.f_bsize / 1024.0)),
63 blocks_percent_used, mountPoint);
70 extern int df_main(int argc, char **argv)
72 printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
73 "1k-blocks", "Used", "Available", "Use%", "Mounted on");
75 /* Only compiled in if BB_MTAB is not defined */
76 whine_if_fstab_is_missing();
79 struct mntent *mountEntry;
83 if ((mountEntry = findMountPoint(argv[1], mtab_file)) ==
85 fprintf(stderr, "%s: can't find mount point.\n", argv[1]);
88 status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
97 struct mntent *mountEntry;
99 mountTable = setmntent(mtab_file, "r");
100 if (mountTable == 0) {
105 while ((mountEntry = getmntent(mountTable))) {
106 df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
108 endmntent(mountTable);