+/* vi: set sw=4 ts=4: */
/*
* Mini df implementation for busybox
*
- * Copyright (C) 1999 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
+
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
- * 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.
+ * 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.
*
- * 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
+ * Aug 28, 2008 Bernhard Reutner-Fischer
*
+ * Implement -P and -B; better coreutils compat; cleanup
*/
-#include "internal.h"
-#include <stdio.h>
#include <mntent.h>
-#include <sys/stat.h>
#include <sys/vfs.h>
-#include <fstab.h>
+#include "libbb.h"
-static const char df_usage[] = "df [filesystem ...]\n"
- "\n" "\tPrint the filesystem space used and space available.\n";
-
-extern const char mtab_file[]; /* Defined in utility.c */
+#if !ENABLE_FEATURE_HUMAN_READABLE
+static unsigned long kscale(unsigned long b, unsigned long bs)
+{
+ return (b * (unsigned long long) bs + 1024/2) / 1024;
+}
+#endif
-static int df(char *device, const char *mountPoint)
+int df_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int df_main(int argc, char **argv)
{
- struct statfs s;
- long blocks_used;
- long blocks_percent_used;
- struct fstab* fstabItem;
-
- if (statfs(mountPoint, &s) != 0) {
- perror(mountPoint);
- return FALSE;
- }
-
- if (s.f_blocks > 0) {
- blocks_used = s.f_blocks - s.f_bfree;
- blocks_percent_used = (long)
- (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
- /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
- if (strcmp (device, "/dev/root") == 0) {
- fstabItem = getfsfile ("/");
- if (fstabItem != NULL)
- device = fstabItem->fs_spec;
- }
- printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
- device,
- (long) (s.f_blocks * (s.f_bsize / 1024.0)),
- (long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)),
- (long) (s.f_bavail * (s.f_bsize / 1024.0)),
- blocks_percent_used, mountPoint);
+ unsigned long blocks_used;
+ unsigned blocks_percent_used;
+ unsigned long df_disp_hr = 1024;
+ int status = EXIT_SUCCESS;
+ unsigned opt;
+ FILE *mount_table;
+ struct mntent *mount_entry;
+ struct statfs s;
- }
+ enum {
+ OPT_KILO = (1 << 0),
+ OPT_POSIX = (1 << 1),
+ OPT_ALL = (1 << 2) * ENABLE_FEATURE_DF_FANCY,
+ OPT_INODE = (1 << 3) * ENABLE_FEATURE_DF_FANCY,
+ OPT_BSIZE = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
+ OPT_HUMAN = (1 << (2 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
+ OPT_MEGA = (1 << (3 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
+ };
+ const char *disp_units_hdr = NULL;
+ char *chp;
- return TRUE;
-}
+#if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY
+ opt_complementary = "k-mB:m-Bk:B-km";
+#elif ENABLE_FEATURE_HUMAN_READABLE
+ opt_complementary = "k-m:m-k";
+#endif
+ opt = getopt32(argv, "kP"
+ IF_FEATURE_DF_FANCY("aiB:")
+ IF_FEATURE_HUMAN_READABLE("hm")
+ IF_FEATURE_DF_FANCY(, &chp));
+ if (opt & OPT_MEGA)
+ df_disp_hr = 1024*1024;
-extern int df_main(int argc, char **argv)
-{
- printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
- "1k-blocks", "Used", "Available", "Use%", "Mounted on");
-
- /* Only compiled in if BB_MTAB is not defined */
- whine_if_fstab_is_missing();
-
- if (argc > 1) {
- struct mntent *mountEntry;
- int status;
-
- while (argc > 1) {
- if ((mountEntry = findMountPoint(argv[1], mtab_file)) ==
- 0) {
- fprintf(stderr, "%s: can't find mount point.\n", argv[1]);
- exit( FALSE);
- }
- status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
- if (status != 0)
- exit( status);
- argc--;
- argv++;
+ if (opt & OPT_BSIZE)
+ df_disp_hr = xatoul_range(chp, 1, ULONG_MAX); /* disallow 0 */
+
+ /* From the manpage of df from coreutils-6.10:
+ Disk space is shown in 1K blocks by default, unless the environment
+ variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.
+ */
+ if (getenv("POSIXLY_CORRECT")) /* TODO - a new libbb function? */
+ df_disp_hr = 512;
+
+ if (opt & OPT_HUMAN) {
+ df_disp_hr = 0;
+ disp_units_hdr = " Size";
+ }
+ if (opt & OPT_INODE)
+ disp_units_hdr = " Inodes";
+
+ if (disp_units_hdr == NULL) {
+#if ENABLE_FEATURE_HUMAN_READABLE
+ disp_units_hdr = xasprintf("%s-blocks",
+ make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX)));
+#else
+ disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
+#endif
}
- exit( TRUE);
- } else {
- FILE *mountTable;
- struct mntent *mountEntry;
-
- mountTable = setmntent(mtab_file, "r");
- if (mountTable == 0) {
- perror(mtab_file);
- exit(FALSE);
+ printf("Filesystem %-15sUsed Available %s Mounted on\n",
+ disp_units_hdr, (opt & OPT_POSIX) ? "Capacity" : "Use%");
+
+ 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);
}
- while ((mountEntry = getmntent(mountTable))) {
- df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
+ while (1) {
+ const char *device;
+ const char *mount_point;
+
+ 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, 1);
+ if (!mount_entry) {
+ bb_error_msg("%s: can't find mount point", mount_point);
+ set_error:
+ status = EXIT_FAILURE;
+ continue;
+ }
+ }
+
+ device = mount_entry->mnt_fsname;
+ mount_point = mount_entry->mnt_dir;
+
+ if (statfs(mount_point, &s) != 0) {
+ bb_simple_perror_msg(mount_point);
+ goto set_error;
+ }
+
+ if ((s.f_blocks > 0) || !mount_table || (opt & OPT_ALL)) {
+ if (opt & OPT_INODE) {
+ s.f_blocks = s.f_files;
+ s.f_bavail = s.f_bfree = s.f_ffree;
+ s.f_bsize = 1;
+
+ if (df_disp_hr)
+ df_disp_hr = 1;
+ }
+ blocks_used = s.f_blocks - s.f_bfree;
+ blocks_percent_used = 0;
+ if (blocks_used + s.f_bavail) {
+ blocks_percent_used = (blocks_used * 100ULL
+ + (blocks_used + s.f_bavail)/2
+ ) / (blocks_used + s.f_bavail);
+ }
+
+ /* GNU coreutils 6.10 skips certain mounts, try to be compatible. */
+ if (strcmp(device, "rootfs") == 0)
+ continue;
+
+#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY
+/* ... and also this is the only user of find_block_device */
+ 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;
+ }
+ }
+#endif
+
+ if (printf("\n%-20s" + 1, device) > 20)
+ printf("\n%-20s", "");
+#if ENABLE_FEATURE_HUMAN_READABLE
+ printf(" %9s ",
+ make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
+
+ printf(" %9s " + 1,
+ make_human_readable_str((s.f_blocks - s.f_bfree),
+ s.f_bsize, df_disp_hr));
+
+ printf("%9s %3u%% %s\n",
+ make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
+ blocks_percent_used, mount_point);
+#else
+ printf(" %9lu %9lu %9lu %3u%% %s\n",
+ 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(mountTable);
- }
- exit( TRUE);
+ return status;
}
projects / oweals / busybox.git / blobdiff