159 lines
4.1 KiB
C
159 lines
4.1 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. and Erik Andersen
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* Copyright (C) 1999,2000,2001 by Erik Andersen <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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <mntent.h>
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#include <sys/vfs.h>
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#include <getopt.h>
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#include "busybox.h"
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extern const char mtab_file[]; /* Defined in utility.c */
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#ifdef CONFIG_FEATURE_HUMAN_READABLE
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static unsigned long df_disp_hr = KILOBYTE;
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#endif
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static int do_df(char *device, const char *mount_point)
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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(mount_point, &s) != 0) {
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perror_msg("%s", mount_point);
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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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if(blocks_used == 0)
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blocks_percent_used = 0;
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else {
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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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}
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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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device = find_real_root_device_name(device);
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if(device==NULL)
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return FALSE;
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}
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#ifdef CONFIG_FEATURE_HUMAN_READABLE
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printf("%-20s %9s ", device,
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make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
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printf("%9s ",
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make_human_readable_str( (s.f_blocks - s.f_bfree), s.f_bsize, df_disp_hr));
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printf("%9s %3ld%% %s\n",
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make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
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blocks_percent_used, mount_point);
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#else
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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 / (double)KILOBYTE)),
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(long) ((s.f_blocks - s.f_bfree)*(s.f_bsize/(double)KILOBYTE)),
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(long) (s.f_bavail * (s.f_bsize / (double)KILOBYTE)),
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blocks_percent_used, mount_point);
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#endif
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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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int status = EXIT_SUCCESS;
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int opt = 0;
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int i = 0;
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char disp_units_hdr[80] = "1k-blocks"; /* default display is kilobytes */
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while ((opt = getopt(argc, argv, "k"
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#ifdef CONFIG_FEATURE_HUMAN_READABLE
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"hm"
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#endif
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)) > 0)
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{
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switch (opt) {
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#ifdef CONFIG_FEATURE_HUMAN_READABLE
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case 'h':
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df_disp_hr = 0;
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strcpy(disp_units_hdr, " Size");
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break;
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case 'm':
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df_disp_hr = MEGABYTE;
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strcpy(disp_units_hdr, "1M-blocks");
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break;
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#endif
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case 'k':
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/* default display is kilobytes */
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break;
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default:
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show_usage();
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}
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}
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printf("%-20s %-14s %s %s %s %s\n", "Filesystem", disp_units_hdr,
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"Used", "Available", "Use%", "Mounted on");
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if(optind < argc) {
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struct mntent *mount_entry;
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for(i = optind; i < argc; i++)
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{
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if ((mount_entry = find_mount_point(argv[i], mtab_file)) == 0) {
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error_msg("%s: can't find mount point.", argv[i]);
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status = EXIT_FAILURE;
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} else if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
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status = EXIT_FAILURE;
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}
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} else {
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FILE *mount_table;
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struct mntent *mount_entry;
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mount_table = setmntent(mtab_file, "r");
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if (mount_table == 0) {
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perror_msg("%s", mtab_file);
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return EXIT_FAILURE;
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}
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while ((mount_entry = getmntent(mount_table))) {
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if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
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status = EXIT_FAILURE;
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}
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endmntent(mount_table);
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}
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return status;
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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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