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/* vi: set sw=4 ts=4: */
/*
* Mini df implementation for busybox
*
* Copyright (C) 1999,2000 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
* based on original code by (I think) Bruce Perens <bruce@pixar.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#include <stdio.h>
#include <mntent.h>
#include <sys/stat.h>
#include <sys/vfs.h>
static const char df_usage[] = "df [filesystem ...]\n\n"
"Print the filesystem space used and space available.\n";
extern const char mtab_file[]; /* Defined in utility.c */
static int df(char *device, const char *mountPoint)
{
struct statfs s;
long blocks_used;
long blocks_percent_used;
if (statfs(mountPoint, &s) != 0) {
perror(mountPoint);
return FALSE;
}
if (s.f_blocks > 0) {
blocks_used = s.f_blocks - s.f_bfree;
blocks_percent_used = (long)
(blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
/* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
if (strcmp(device, "/dev/root") == 0) {
/* Adjusts device to be the real root device,
* or leaves device alone if it can't find it */
find_real_root_device_name( device);
}
printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
device,
(long) (s.f_blocks * (s.f_bsize / 1024.0)),
(long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)),
(long) (s.f_bavail * (s.f_bsize / 1024.0)),
blocks_percent_used, mountPoint);
}
return TRUE;
}
extern int df_main(int argc, char **argv)
{
printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
"1k-blocks", "Used", "Available", "Use%", "Mounted on");
if (argc > 1) {
struct mntent *mountEntry;
int status;
if (**(argv + 1) == '-') {
usage(df_usage);
}
while (argc > 1) {
if ((mountEntry = findMountPoint(argv[1], mtab_file)) == 0) {
fprintf(stderr, "%s: can't find mount point.\n", argv[1]);
exit(FALSE);
}
status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
if (status != 0)
exit(status);
argc--;
argv++;
}
exit(TRUE);
} else {
FILE *mountTable;
struct mntent *mountEntry;
mountTable = setmntent(mtab_file, "r");
if (mountTable == 0) {
perror(mtab_file);
exit(FALSE);
}
while ((mountEntry = getmntent(mountTable))) {
df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
}
endmntent(mountTable);
}
exit(TRUE);
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
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