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/* vi: set sw=4 ts=4: */
/*
* Mini df implementation for busybox
*
* Copyright (C) 1999,2000,2001 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <mntent.h>
#include <sys/vfs.h>
#include <getopt.h>
#include "busybox.h"
extern const char mtab_file[]; /* Defined in utility.c */
#ifdef BB_FEATURE_HUMAN_READABLE
static unsigned long df_disp_hr = KILOBYTE;
#endif
static int do_df(char *device, const char *mount_point)
{
struct statfs s;
long blocks_used;
long blocks_percent_used;
#ifdef BB_FEATURE_HUMAN_READABLE
long base;
#endif
if (statfs(mount_point, &s) != 0) {
perror_msg("%s", mount_point);
return FALSE;
}
if (s.f_blocks > 0) {
blocks_used = s.f_blocks - s.f_bfree;
if(blocks_used == 0)
blocks_percent_used = 0;
else {
blocks_percent_used = (long)
(blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
}
if (strcmp(device, "/dev/root") == 0) {
/* Adjusts device to be the real root device,
* or leaves device alone if it can't find it */
device = find_real_root_device_name(device);
if(device==NULL)
return FALSE;
}
#ifdef BB_FEATURE_HUMAN_READABLE
switch (df_disp_hr) {
case MEGABYTE:
base = KILOBYTE;
break;
case KILOBYTE:
base = 1;
break;
default:
base = 0;
}
printf("%-20s %9s ", device,
make_human_readable_str((unsigned long)(s.f_blocks *
(s.f_bsize/(double)KILOBYTE)), base));
printf("%9s ",
make_human_readable_str((unsigned long)(
(s.f_blocks - s.f_bfree) *
(s.f_bsize/(double)KILOBYTE)), base));
printf("%9s %3ld%% %s\n",
make_human_readable_str((unsigned long)(s.f_bavail *
(s.f_bsize/(double)KILOBYTE)), base),
blocks_percent_used, mount_point);
#else
printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
device,
(long) (s.f_blocks * (s.f_bsize / (double)KILOBYTE)),
(long) ((s.f_blocks - s.f_bfree)*(s.f_bsize/(double)KILOBYTE)),
(long) (s.f_bavail * (s.f_bsize / (double)KILOBYTE)),
blocks_percent_used, mount_point);
#endif
}
return TRUE;
}
extern int df_main(int argc, char **argv)
{
int status = EXIT_SUCCESS;
int opt = 0;
int i = 0;
char disp_units_hdr[80] = "1k-blocks"; /* default display is kilobytes */
while ((opt = getopt(argc, argv, "k"
#ifdef BB_FEATURE_HUMAN_READABLE
"hm"
#endif
)) > 0)
{
switch (opt) {
#ifdef BB_FEATURE_HUMAN_READABLE
case 'h':
df_disp_hr = 0;
strcpy(disp_units_hdr, " Size");
break;
case 'm':
df_disp_hr = MEGABYTE;
strcpy(disp_units_hdr, "1M-blocks");
break;
#endif
case 'k':
/* default display is kilobytes */
break;
default:
show_usage();
}
}
printf("%-20s %-14s %s %s %s %s\n", "Filesystem", disp_units_hdr,
"Used", "Available", "Use%", "Mounted on");
if(optind < argc) {
struct mntent *mount_entry;
for(i = optind; i < argc; i++)
{
if ((mount_entry = find_mount_point(argv[i], mtab_file)) == 0) {
error_msg("%s: can't find mount point.", argv[i]);
status = EXIT_FAILURE;
} else if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
status = EXIT_FAILURE;
}
} else {
FILE *mount_table;
struct mntent *mount_entry;
mount_table = setmntent(mtab_file, "r");
if (mount_table == 0) {
perror_msg("%s", mtab_file);
return EXIT_FAILURE;
}
while ((mount_entry = getmntent(mount_table))) {
if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
status = EXIT_FAILURE;
}
endmntent(mount_table);
}
return status;
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
|
