/*
* 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>
+ * 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 source tree.
*/
-/* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
+/* 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)
*
* Size reduction. Removed floating point dependency. Added error checking
- * on output. Output stats on 0-sized filesystems if specificly listed on
+ * on output. Output stats on 0-sized filesystems if specifically listed on
* the command line. Properly round *-blocks, Used, and Available quantities.
+ *
+ * Aug 28, 2008 Bernhard Reutner-Fischer
+ *
+ * Implement -P and -B; better coreutils compat; cleanup
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
+//usage:#define df_trivial_usage
+//usage: "[-Pk"
+//usage: IF_FEATURE_HUMAN_READABLE("mh")
+//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: 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"
+
#include <mntent.h>
#include <sys/vfs.h>
-#include "busybox.h"
+#include "libbb.h"
+#include "unicode.h"
-#ifndef CONFIG_FEATURE_HUMAN_READABLE
-static long kscale(long b, long bs)
+#if !ENABLE_FEATURE_HUMAN_READABLE
+static unsigned long kscale(unsigned long b, unsigned long bs)
{
- return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE;
+ 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)
{
- long blocks_used;
- long blocks_percent_used;
-#ifdef CONFIG_FEATURE_HUMAN_READABLE
- unsigned long df_disp_hr = KILOBYTE;
-#endif
+ unsigned long blocks_used;
+ unsigned blocks_percent_used;
+ unsigned long df_disp_hr = 1024;
int status = EXIT_SUCCESS;
- unsigned long opt;
+ 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;
-
-#ifdef CONFIG_FEATURE_HUMAN_READABLE
- bb_opt_complementaly = "h-km:k-hm:m-hk";
- opt = bb_getopt_ulflags(argc, argv, "hmk");
- if(opt & 1) {
- df_disp_hr = 0;
- disp_units_hdr = " Size";
- }
- if(opt & 2) {
- df_disp_hr = MEGABYTE;
- disp_units_hdr = "1M-blocks";
+
+ 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;
+
+ init_unicode();
+
+#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;
+
+ 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",
+ /* 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
- opt = bb_getopt_ulflags(argc, argv, "k");
+ disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
#endif
-
- bb_printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
- "", disp_units_hdr);
+ }
+ printf("Filesystem %-15sUsed Available %s Mounted on\n",
+ disp_units_hdr, (opt & OPT_POSIX) ? "Capacity" : "Use%");
mount_table = NULL;
argv += optind;
- if (optind >= argc) {
- if (!(mount_table = setmntent(bb_path_mtab_file, "r"))) {
+ if (!argv[0]) {
+ mount_table = setmntent(bb_path_mtab_file, "r");
+ if (!mount_table)
bb_perror_msg_and_die(bb_path_mtab_file);
- }
}
- do {
+ while (1) {
const char *device;
const char *mount_point;
if (mount_table) {
- if (!(mount_entry = getmntent(mount_table))) {
+ mount_entry = getmntent(mount_table);
+ if (!mount_entry) {
endmntent(mount_table);
break;
}
} else {
- if (!(mount_point = *argv++)) {
+ mount_point = *argv++;
+ if (!mount_point)
break;
- }
- if (!(mount_entry = find_mount_point(mount_point, bb_path_mtab_file))) {
- bb_error_msg("%s: can't find mount point.", mount_point);
- SET_ERROR:
+ 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;
}
mount_point = mount_entry->mnt_dir;
if (statfs(mount_point, &s) != 0) {
- bb_perror_msg("%s", mount_point);
- goto SET_ERROR;
+ bb_simple_perror_msg(mount_point);
+ goto set_error;
}
-
- if ((s.f_blocks > 0) || !mount_table){
+
+ 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 = (((long long) blocks_used) * 100
- + (blocks_used + s.f_bavail)/2
- ) / (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 (ENABLE_FEATURE_SKIP_ROOTFS && strcmp(device, "rootfs") == 0)
+ continue;
+
+#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 */
- if ((device = find_real_root_device_name(device)) == NULL) {
- goto SET_ERROR;
+ * 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);
}
-
-#ifdef CONFIG_FEATURE_HUMAN_READABLE
- bb_printf("%-21s%9s ", device,
- make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
-
- bb_printf("%9s ",
- make_human_readable_str( (s.f_blocks - s.f_bfree),
- s.f_bsize, df_disp_hr));
-
- bb_printf("%9s %3ld%% %s\n",
- make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
- blocks_percent_used, mount_point);
#else
- bb_printf("%-21s%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);
+ if (printf("\n%-20s" + 1, device) > 20 && !(opt & OPT_POSIX))
+ printf("\n%-20s", "");
#endif
- }
- } while (1);
+#if ENABLE_FEATURE_HUMAN_READABLE
+ printf(" %9s ",
+ /* f_blocks x f_bsize / df_disp_hr, show one fractional,
+ * use suffixes if df_disp_hr == 0 */
+ make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
- bb_fflush_stdout_and_exit(status);
-}
+ printf(" %9s " + 1,
+ /* EXPR x f_bsize / 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_bsize, df_disp_hr));
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ printf("%9s %3u%% %s\n",
+ /* f_bavail x f_bsize / df_disp_hr, show one fractional,
+ * use suffixes if df_disp_hr == 0 */
+ 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
+ }
+ }
+
+ return status;
+}
projects / platform / upstream / busybox.git / blobdiff