busybox/coreutils/df.c

159 lines
4.1 KiB
C
Raw Normal View History

/* vi: set sw=4 ts=4: */
1999-10-21 03:38:37 +05:30
/*
* Mini df implementation for busybox
*
* Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
* Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
1999-10-21 03:38:37 +05:30
* 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
*
*/
1999-10-05 21:54:54 +05:30
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
1999-10-05 21:54:54 +05:30
#include <mntent.h>
#include <sys/vfs.h>
#include <getopt.h>
#include "busybox.h"
1999-10-05 21:54:54 +05:30
extern const char mtab_file[]; /* Defined in utility.c */
#ifdef CONFIG_FEATURE_HUMAN_READABLE
static unsigned long df_disp_hr = KILOBYTE;
#endif
1999-10-05 21:54:54 +05:30
static int do_df(char *device, const char *mount_point)
1999-10-05 21:54:54 +05:30
{
struct statfs s;
long blocks_used;
long blocks_percent_used;
1999-10-21 03:38:37 +05:30
if (statfs(mount_point, &s) != 0) {
perror_msg("%s", mount_point);
return FALSE;
}
1999-10-21 03:38:37 +05:30
if (s.f_blocks > 0) {
blocks_used = s.f_blocks - s.f_bfree;
2001-02-21 03:22:49 +05:30
if(blocks_used == 0)
2001-01-23 04:20:01 +05:30
blocks_percent_used = 0;
2001-02-21 03:22:49 +05:30
else {
blocks_percent_used = (long)
(blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
2001-02-21 03:22:49 +05:30
}
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 CONFIG_FEATURE_HUMAN_READABLE
printf("%-20s %9s ", device,
make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
printf("%9s ",
make_human_readable_str( (s.f_blocks - s.f_bfree), s.f_bsize, df_disp_hr));
printf("%9s %3ld%% %s\n",
make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
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);
2001-02-21 03:22:49 +05:30
#endif
}
1999-10-21 03:38:37 +05:30
return TRUE;
1999-10-05 21:54:54 +05:30
}
1999-10-21 03:38:37 +05:30
extern int df_main(int argc, char **argv)
1999-10-05 21:54:54 +05:30
{
2000-12-06 21:25:23 +05:30
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 CONFIG_FEATURE_HUMAN_READABLE
"hm"
#endif
)) > 0)
{
switch (opt) {
#ifdef CONFIG_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();
}
}
2000-12-06 21:25:23 +05:30
printf("%-20s %-14s %s %s %s %s\n", "Filesystem", disp_units_hdr,
"Used", "Available", "Use%", "Mounted on");
1999-10-21 03:38:37 +05:30
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]);
2000-12-06 21:25:23 +05:30
status = EXIT_FAILURE;
} else if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
2000-12-06 21:25:23 +05:30
status = EXIT_FAILURE;
}
} else {
FILE *mount_table;
struct mntent *mount_entry;
1999-10-21 03:38:37 +05:30
mount_table = setmntent(mtab_file, "r");
if (mount_table == 0) {
perror_msg("%s", mtab_file);
return EXIT_FAILURE;
}
1999-10-07 01:55:32 +05:30
while ((mount_entry = getmntent(mount_table))) {
if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
2000-12-06 21:25:23 +05:30
status = EXIT_FAILURE;
}
endmntent(mount_table);
1999-10-21 03:38:37 +05:30
}
1999-10-07 01:55:32 +05:30
2000-12-06 21:25:23 +05:30
return status;
1999-10-21 03:38:37 +05:30
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/