/*
* Mini df implementation for busybox
*
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
+
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
+ * Size reduction. Removed floating point dependency. Added error checking
+ * on output. Output stats on 0-sized filesystems if specifically listed on
+ * the command line. Properly round *-blocks, Used, and Available quantities.
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
#include <mntent.h>
#include <sys/vfs.h>
-#include <getopt.h>
-#include "busybox.h"
+#include "libbb.h"
-extern const char mtab_file[]; /* Defined in utility.c */
-#ifdef BB_FEATURE_HUMAN_READABLE
-static unsigned long df_disp_hr = KILOBYTE;
+#ifndef CONFIG_FEATURE_HUMAN_READABLE
+static long kscale(long b, long bs)
+{
+ return ( b * (long long) bs + 1024/2 ) / 1024;
+}
#endif
-static int do_df(char *device, const char *mount_point)
+int df_main(int argc, char **argv);
+int df_main(int argc, char **argv)
{
- struct statfs s;
long blocks_used;
long blocks_percent_used;
-#ifdef BB_FEATURE_HUMAN_READABLE
- long base;
-#endif
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+ unsigned long df_disp_hr = 1024;
+#endif
+ int status = EXIT_SUCCESS;
+ unsigned opt;
+ FILE *mount_table;
+ struct mntent *mount_entry;
+ struct statfs s;
+ static const char hdr_1k[] = "1k-blocks"; /* default display is kilobytes */
+ const char *disp_units_hdr = hdr_1k;
- if (statfs(mount_point, &s) != 0) {
- perror_msg("%s", mount_point);
- return FALSE;
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+ opt_complementary = "h-km:k-hm:m-hk";
+ opt = getopt32(argc, argv, "hmk");
+ if (opt & 1) {
+ df_disp_hr = 0;
+ disp_units_hdr = " Size";
+ }
+ if (opt & 2) {
+ df_disp_hr = 1024*1024;
+ disp_units_hdr = "1M-blocks";
}
-
- 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 */
- find_real_root_device_name( device);
- }
-#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);
+ opt = getopt32(argc, argv, "k");
#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 */
+ printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
+ "", disp_units_hdr);
- 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();
+ mount_table = NULL;
+ argv += optind;
+ if (optind >= argc) {
+ mount_table = setmntent(bb_path_mtab_file, "r");
+ if (!mount_table) {
+ bb_perror_msg_and_die(bb_path_mtab_file);
}
}
- printf("%-20s %-14s %s %s %s %s\n", "Filesystem", disp_units_hdr,
- "Used", "Available", "Use%", "Mounted on");
+ do {
+ const char *device;
+ const char *mount_point;
- 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))
+ if (mount_table) {
+ mount_entry = getmntent(mount_table);
+ if (!mount_entry) {
+ endmntent(mount_table);
+ break;
+ }
+ } else {
+ mount_point = *argv++;
+ if (!mount_point) {
+ break;
+ }
+ mount_entry = find_mount_point(mount_point, bb_path_mtab_file);
+ if (!mount_entry) {
+ bb_error_msg("%s: can't find mount point", mount_point);
+ SET_ERROR:
status = EXIT_FAILURE;
+ continue;
+ }
}
- } 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;
+
+ device = mount_entry->mnt_fsname;
+ mount_point = mount_entry->mnt_dir;
+
+ if (statfs(mount_point, &s) != 0) {
+ bb_perror_msg("%s", mount_point);
+ goto SET_ERROR;
}
- while ((mount_entry = getmntent(mount_table))) {
- if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
- status = EXIT_FAILURE;
+ if ((s.f_blocks > 0) || !mount_table){
+ blocks_used = s.f_blocks - s.f_bfree;
+ blocks_percent_used = 0;
+ if (blocks_used + s.f_bavail) {
+ blocks_percent_used = (((long long) blocks_used) * 100
+ + (blocks_used + s.f_bavail)/2
+ ) / (blocks_used + s.f_bavail);
+ }
+
+ if (strcmp(device, "rootfs") == 0) {
+ continue;
+ } else 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_block_device("/");
+ if (!device) {
+ goto SET_ERROR;
+ }
+ }
+
+#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,
+ kscale(s.f_blocks, s.f_bsize),
+ kscale(s.f_blocks-s.f_bfree, s.f_bsize),
+ kscale(s.f_bavail, s.f_bsize),
+ blocks_percent_used, mount_point);
+#endif
}
- endmntent(mount_table);
- }
- return status;
-}
+ } while (1);
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ fflush_stdout_and_exit(status);
+}
projects / oweals / busybox.git / blobdiff