/*
* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+/* 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
*/
+//config:config DF
+//config: bool "df (7.5 kb)"
+//config: default y
+//config: help
+//config: df reports the amount of disk space used and available
+//config: on filesystems.
+//config:
+//config:config FEATURE_DF_FANCY
+//config: bool "Enable -a, -i, -B"
+//config: default y
+//config: depends on DF
+//config: help
+//config: -a Show all filesystems
+//config: -i Inodes
+//config: -B <SIZE> Blocksize
-#include <stdio.h>
-#include <stdlib.h>
-#include <mntent.h>
-#include <sys/vfs.h>
-#include <getopt.h>
-#include "busybox.h"
+//applet:IF_DF(APPLET_NOEXEC(df, df, BB_DIR_BIN, BB_SUID_DROP, df))
-extern const char mtab_file[]; /* Defined in utility.c */
-#ifdef BB_FEATURE_HUMAN_READABLE
-unsigned long disp_hr = KILOBYTE;
-#endif
+//kbuild:lib-$(CONFIG_DF) += df.o
-static int df(char *device, const char *mountPoint)
-{
- struct statfs s;
- long blocks_used;
- long blocks_percent_used;
-#ifdef BB_FEATURE_HUMAN_READABLE
- long base;
-#endif
-
- if (statfs(mountPoint, &s) != 0) {
- perror_msg("%s", mountPoint);
- return FALSE;
- }
+/* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
- 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 (disp_hr) {
- case MEGABYTE:
- base = KILOBYTE;
- break;
- case KILOBYTE:
- base = 1;
- break;
- default:
- base = 0;
- }
- printf("%-20s %9s ", device,
- format(s.f_blocks * (s.f_bsize/KILOBYTE), base));
- printf("%9s ",
- format((s.f_blocks - s.f_bfree) * (s.f_bsize/KILOBYTE), base));
- printf("%9s %3ld%% %s\n",
- format(s.f_bavail * (s.f_bsize/KILOBYTE), base),
- blocks_percent_used, mountPoint);
-#else
- printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
- device,
- (long) (s.f_blocks * (s.f_bsize / KILOBYTE)),
- (long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / KILOBYTE)),
- (long) (s.f_bavail * (s.f_bsize / KILOBYTE)),
- blocks_percent_used, mountPoint);
-#endif
- }
+//usage:#define df_trivial_usage
+//usage: "[-Pk"
+//usage: IF_FEATURE_HUMAN_READABLE("mh")
+//usage: "T"
+//usage: IF_FEATURE_DF_FANCY("ai] [-B SIZE")
+//usage: "] [FILESYSTEM]..."
+//usage:#define df_full_usage "\n\n"
+//usage: "Print filesystem usage statistics\n"
+//usage: "\n -P POSIX output format"
+//usage: "\n -k 1024-byte blocks (default)"
+//usage: IF_FEATURE_HUMAN_READABLE(
+//usage: "\n -m 1M-byte blocks"
+//usage: "\n -h Human readable (e.g. 1K 243M 2G)"
+//usage: )
+//usage: "\n -T Print filesystem type"
+//usage: IF_FEATURE_DF_FANCY(
+//usage: "\n -a Show all filesystems"
+//usage: "\n -i Inodes"
+//usage: "\n -B SIZE Blocksize"
+//usage: )
+//usage:
+//usage:#define df_example_usage
+//usage: "$ df\n"
+//usage: "Filesystem 1K-blocks Used Available Use% Mounted on\n"
+//usage: "/dev/sda3 8690864 8553540 137324 98% /\n"
+//usage: "/dev/sda1 64216 36364 27852 57% /boot\n"
+//usage: "$ df /dev/sda3\n"
+//usage: "Filesystem 1K-blocks Used Available Use% Mounted on\n"
+//usage: "/dev/sda3 8690864 8553540 137324 98% /\n"
+//usage: "$ POSIXLY_CORRECT=sure df /dev/sda3\n"
+//usage: "Filesystem 512B-blocks Used Available Use% Mounted on\n"
+//usage: "/dev/sda3 17381728 17107080 274648 98% /\n"
+//usage: "$ POSIXLY_CORRECT=yep df -P /dev/sda3\n"
+//usage: "Filesystem 512-blocks Used Available Capacity Mounted on\n"
+//usage: "/dev/sda3 17381728 17107080 274648 98% /\n"
- return TRUE;
+#include <mntent.h>
+#include <sys/statvfs.h>
+#include "libbb.h"
+#include "unicode.h"
+
+#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
-extern int df_main(int argc, char **argv)
+int df_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int df_main(int argc UNUSED_PARAM, char **argv)
{
+ unsigned long df_disp_hr = 1024;
int status = EXIT_SUCCESS;
- int opt = 0;
- int i = 0;
+ unsigned opt;
+ FILE *mount_table;
+ struct mntent *mount_entry;
+ struct statvfs s;
- while ((opt = getopt(argc, argv,
-#ifdef BB_FEATURE_HUMAN_READABLE
- "hm"
-#endif
- "k"
-)) > 0)
- {
- switch (opt) {
-#ifdef BB_FEATURE_HUMAN_READABLE
- case 'h': disp_hr = 0; break;
- case 'm': disp_hr = MEGABYTE; break;
+ enum {
+ OPT_KILO = (1 << 0),
+ OPT_POSIX = (1 << 1),
+ OPT_FSTYPE = (1 << 2),
+ OPT_ALL = (1 << 3) * ENABLE_FEATURE_DF_FANCY,
+ OPT_INODE = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
+ OPT_BSIZE = (1 << 5) * ENABLE_FEATURE_DF_FANCY,
+ OPT_HUMAN = (1 << (3 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
+ OPT_MEGA = (1 << (4 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
+ };
+ const char *disp_units_hdr = NULL;
+ char *chp;
+
+ init_unicode();
+
+ opt = getopt32(argv, "^"
+ "kPT"
+ IF_FEATURE_DF_FANCY("aiB:")
+ IF_FEATURE_HUMAN_READABLE("hm")
+ "\0"
+#if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY
+ "k-mB:m-Bk:B-km"
+#elif ENABLE_FEATURE_HUMAN_READABLE
+ "k-m:m-k"
#endif
- case 'k': break;
- default:
- show_usage();
+ IF_FEATURE_DF_FANCY(, &chp)
+ );
+ if (opt & OPT_MEGA)
+ df_disp_hr = 1024*1024;
+
+ if (opt & OPT_BSIZE) {
+ /* GNU coreutils 8.25 accepts "-BMiB" form too */
+ int i;
+ for (i = 0; kmg_i_suffixes[i].suffix[0]; i++) {
+ if (strcmp(kmg_i_suffixes[i].suffix, chp) == 0) {
+ df_disp_hr = kmg_i_suffixes[i].mult;
+ goto got_it;
+ }
}
+ /* Range used to disallow 0 */
+ df_disp_hr = xatoul_range_sfx(chp, 1, ULONG_MAX, kmg_i_suffixes);
+ got_it: ;
+ }
+
+ /* 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";
- printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
-#ifdef BB_FEATURE_HUMAN_READABLE
- (KILOBYTE == disp_hr) ? "1k-blocks" :
- (MEGABYTE == disp_hr) ? "1M-blocks" : " Size",
+ if (disp_units_hdr == NULL) {
+#if ENABLE_FEATURE_HUMAN_READABLE
+ disp_units_hdr = xasprintf("%s-blocks",
+ /* print df_disp_hr, show no fractionals,
+ * use suffixes if OPT_POSIX is set in opt */
+ make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX))
+ );
#else
- "1k-blocks",
+ disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
#endif
- "Used", "Available", "Use%", "Mounted on");
+ }
+ printf("Filesystem %s%-15sUsed Available %s Mounted on\n",
+ (opt & OPT_FSTYPE) ? "Type " : "",
+ disp_units_hdr,
+ (opt & OPT_POSIX) ? "Capacity" : "Use%");
- if(optind < argc) {
- struct mntent *mountEntry;
- for(i = optind; i < argc; i++)
- {
- if ((mountEntry = find_mount_point(argv[i], mtab_file)) == 0) {
- error_msg("%s: can't find mount point.", argv[i]);
- status = EXIT_FAILURE;
- } else if (!df(mountEntry->mnt_fsname, mountEntry->mnt_dir))
+ mount_table = NULL;
+ argv += optind;
+ if (!argv[0]) {
+ mount_table = setmntent(bb_path_mtab_file, "r");
+ if (!mount_table)
+ bb_perror_msg_and_die(bb_path_mtab_file);
+ }
+
+ while (1) {
+ const char *device;
+ const char *mount_point;
+ const char *fs_type;
+
+ 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;
+ }
}
- } else {
- FILE *mountTable;
- struct mntent *mountEntry;
-
- mountTable = setmntent(mtab_file, "r");
- if (mountTable == 0) {
- perror_msg("%s", mtab_file);
- return EXIT_FAILURE;
+
+ device = mount_entry->mnt_fsname;
+
+ /* GNU coreutils 6.10 skips certain mounts, try to be compatible */
+ if (ENABLE_FEATURE_SKIP_ROOTFS && strcmp(device, "rootfs") == 0)
+ continue;
+
+ mount_point = mount_entry->mnt_dir;
+ fs_type = mount_entry->mnt_type;
+
+ if (statvfs(mount_point, &s) != 0) {
+ bb_simple_perror_msg(mount_point);
+ goto set_error;
}
+ /* Some uclibc versions were seen to lose f_frsize
+ * (kernel does return it, but then uclibc does not copy it)
+ */
+ if (s.f_frsize == 0)
+ s.f_frsize = s.f_bsize;
- while ((mountEntry = getmntent(mountTable))) {
- if (!df(mountEntry->mnt_fsname, mountEntry->mnt_dir))
- status = EXIT_FAILURE;
+ if ((s.f_blocks > 0) || !mount_table || (opt & OPT_ALL)) {
+ unsigned long long blocks_used;
+ unsigned long long blocks_total;
+ unsigned blocks_percent_used;
+
+ if (opt & OPT_INODE) {
+ s.f_blocks = s.f_files;
+ s.f_bavail = s.f_bfree = s.f_ffree;
+ s.f_frsize = 1;
+ if (df_disp_hr)
+ df_disp_hr = 1;
+ }
+ blocks_used = s.f_blocks - s.f_bfree;
+ blocks_total = blocks_used + s.f_bavail;
+ blocks_percent_used = blocks_total; /* 0% if blocks_total == 0, else... */
+ if (blocks_total != 0) {
+ /* Downscale sizes for narrower division */
+ unsigned u;
+ while (blocks_total >= INT_MAX / 101) {
+ blocks_total >>= 1;
+ blocks_used >>= 1;
+ }
+ u = (unsigned)blocks_used * 100u + (unsigned)blocks_total / 2;
+ blocks_percent_used = u / (unsigned)blocks_total;
+ }
+
+#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY
+ 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 ENABLE_UNICODE_SUPPORT
+ {
+ uni_stat_t uni_stat;
+ char *uni_dev = unicode_conv_to_printable(&uni_stat, device);
+ if (uni_stat.unicode_width > 20 && !(opt & OPT_POSIX)) {
+ printf("%s\n%20s", uni_dev, "");
+ } else {
+ printf("%s%*s", uni_dev, 20 - (int)uni_stat.unicode_width, "");
+ }
+ free(uni_dev);
+ if (opt & OPT_FSTYPE) {
+ char *uni_type = unicode_conv_to_printable(&uni_stat, fs_type);
+ if (uni_stat.unicode_width > 10 && !(opt & OPT_POSIX))
+ printf(" %s\n%31s", uni_type, "");
+ else
+ printf(" %s%*s", uni_type, 10 - (int)uni_stat.unicode_width, "");
+ free(uni_type);
+ }
+ }
+#else
+ if (printf("\n%-20s" + 1, device) > 20 && !(opt & OPT_POSIX))
+ printf("\n%-20s", "");
+ if (opt & OPT_FSTYPE) {
+ if (printf(" %-10s", fs_type) > 11 && !(opt & OPT_POSIX))
+ printf("\n%-30s", "");
+ }
+#endif
+
+#if ENABLE_FEATURE_HUMAN_READABLE
+ printf(" %9s ",
+ /* f_blocks x f_frsize / df_disp_hr, show one fractional,
+ * use suffixes if df_disp_hr == 0 */
+ make_human_readable_str(s.f_blocks, s.f_frsize, df_disp_hr));
+
+ printf(" %9s " + 1,
+ /* EXPR x f_frsize / df_disp_hr, show one fractional,
+ * use suffixes if df_disp_hr == 0 */
+ make_human_readable_str((s.f_blocks - s.f_bfree),
+ s.f_frsize, df_disp_hr));
+
+ printf("%9s %3u%% %s\n",
+ /* f_bavail x f_frsize / df_disp_hr, show one fractional,
+ * use suffixes if df_disp_hr == 0 */
+ make_human_readable_str(s.f_bavail, s.f_frsize, df_disp_hr),
+ blocks_percent_used, mount_point);
+#else
+ printf(" %9lu %9lu %9lu %3u%% %s\n",
+ kscale(s.f_blocks, s.f_frsize),
+ kscale(s.f_blocks - s.f_bfree, s.f_frsize),
+ kscale(s.f_bavail, s.f_frsize),
+ blocks_percent_used, mount_point);
+#endif
}
- endmntent(mountTable);
}
return status;
}
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/