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