coreutils/df.c - codeaurora/busybox - Gitiles

 /* vi: set sw=4 ts=4: */
 /*
  * Mini df implementation for busybox
  *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 /* 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.
  *
  * Aug 28, 2008      Bernhard Reutner-Fischer
  *
  * Implement -P and -B; better coreutils compat; cleanup
  */
 //config:config DF
 //config:	bool "df (6.8 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
 //config:
 //config:config FEATURE_SKIP_ROOTFS
 //config:	bool "Skip rootfs in mount table"
 //config:	default y
 //config:	depends on DF
 //config:	help
 //config:	Ignore rootfs entry in mount table.
 //config:
 //config:	In Linux, kernel has a special filesystem, rootfs, which is initially
 //config:	mounted on /. It contains initramfs data, if kernel is configured
 //config:	to have one. Usually, another file system is mounted over / early
 //config:	in boot process, and therefore most tools which manipulate
 //config:	mount table, such as df, will skip rootfs entry.
 //config:
 //config:	However, some systems do not mount anything on /.
 //config:	If you need to configure busybox for one of these systems,
 //config:	you may find it useful to turn this option off to make df show
 //config:	initramfs statistics.
 //config:
 //config:	Otherwise, choose Y.

 //applet:IF_DF(APPLET_NOEXEC(df, df, BB_DIR_BIN, BB_SUID_DROP, df))

 //kbuild:lib-$(CONFIG_DF) += df.o

 /* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */
 /* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */

 //usage:#define df_trivial_usage
 //usage:	"[-Pk"
 //usage:	IF_FEATURE_HUMAN_READABLE("mh")
 //usage:	"T"
 //usage:	IF_FEATURE_DF_FANCY("ai] [-B SIZE")
 //usage:	"] [-t TYPE] [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:     "\n	-t TYPE	Print only mounts of this 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"

 #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

 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;
 	unsigned opt;
 	FILE *mount_table;
 	struct mntent *mount_entry;
 	struct statvfs s;
 	enum {
 		OPT_KILO     = (1 << 0),
 		OPT_POSIX    = (1 << 1),
 		OPT_FSTYPE   = (1 << 2),
 		OPT_t        = (1 << 3),
 		OPT_ALL      = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
 		OPT_INODE    = (1 << 5) * ENABLE_FEATURE_DF_FANCY,
 		OPT_BSIZE    = (1 << 6) * ENABLE_FEATURE_DF_FANCY,
 		OPT_HUMAN    = (1 << (4 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
 		OPT_HUMANDEC = (1 << (5 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
 		OPT_MEGA     = (1 << (6 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE,
 	};
 	const char *disp_units_hdr = NULL;
 	char *chp, *opt_t;

 	init_unicode();

 	/* 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;

 	opt = getopt32(argv, "^"
 			"kPTt:"
 			IF_FEATURE_DF_FANCY("aiB:")
 			IF_FEATURE_HUMAN_READABLE("hHm")
 			"\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
 			, &opt_t
 			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: ;
 	}

 	if (opt & (OPT_HUMAN|OPT_HUMANDEC)) {
 		df_disp_hr = 0;
 //TODO: need to add support in make_human_readable_str() for "decimal human readable"
 		//if (opt & OPT_HUMANDEC)
 		//	df_disp_hr--;
 		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
 		disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
 #endif
 	}

 	printf("Filesystem           %s%-15sUsed Available %s Mounted on\n",
 			(opt & OPT_FSTYPE) ? "Type       " : "",
 			disp_units_hdr,
 			(opt & OPT_POSIX) ? "Capacity" : "Use%");

 	mount_table = NULL;
 	argv += optind;
 	if (!argv[0]) {
 		mount_table = setmntent(bb_path_mtab_file, "r");
 		if (!mount_table)
 			bb_simple_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;
 			}
 		}

 		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 (opt & OPT_t) {
 			if (strcmp(fs_type, opt_t) != 0)
 				continue;
 		}

 		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;

 		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
 		}
 	}

 	return status;
 }
	/* vi: set sw=4 ts=4: */
	/*
	* Mini df implementation for busybox
	*
	* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
	* based on original code by (I think) Bruce Perens <bruce@pixar.com>.
	*
	* Licensed under GPLv2 or later, see file LICENSE in this source tree.
	*/
	/* 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.
	*
	* Aug 28, 2008 Bernhard Reutner-Fischer
	*
	* Implement -P and -B; better coreutils compat; cleanup
	*/
	//config:config DF
	//config: bool "df (6.8 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
	//config:
	//config:config FEATURE_SKIP_ROOTFS
	//config: bool "Skip rootfs in mount table"
	//config: default y
	//config: depends on DF
	//config: help
	//config: Ignore rootfs entry in mount table.
	//config:
	//config: In Linux, kernel has a special filesystem, rootfs, which is initially
	//config: mounted on /. It contains initramfs data, if kernel is configured
	//config: to have one. Usually, another file system is mounted over / early
	//config: in boot process, and therefore most tools which manipulate
	//config: mount table, such as df, will skip rootfs entry.
	//config:
	//config: However, some systems do not mount anything on /.
	//config: If you need to configure busybox for one of these systems,
	//config: you may find it useful to turn this option off to make df show
	//config: initramfs statistics.
	//config:
	//config: Otherwise, choose Y.

	//applet:IF_DF(APPLET_NOEXEC(df, df, BB_DIR_BIN, BB_SUID_DROP, df))

	//kbuild:lib-$(CONFIG_DF) += df.o

	/* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */
	/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */

	//usage:#define df_trivial_usage
	//usage: "[-Pk"
	//usage: IF_FEATURE_HUMAN_READABLE("mh")
	//usage: "T"
	//usage: IF_FEATURE_DF_FANCY("ai] [-B SIZE")
	//usage: "] [-t TYPE] [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: "\n -t TYPE Print only mounts of this 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"

	#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

	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;
	unsigned opt;
	FILE *mount_table;
	struct mntent *mount_entry;
	struct statvfs s;
	enum {
	OPT_KILO = (1 << 0),
	OPT_POSIX = (1 << 1),
	OPT_FSTYPE = (1 << 2),
	OPT_t = (1 << 3),
	OPT_ALL = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
	OPT_INODE = (1 << 5) * ENABLE_FEATURE_DF_FANCY,
	OPT_BSIZE = (1 << 6) * ENABLE_FEATURE_DF_FANCY,
	OPT_HUMAN = (1 << (4 + 3ENABLE_FEATURE_DF_FANCY)) ENABLE_FEATURE_HUMAN_READABLE,
	OPT_HUMANDEC = (1 << (5 + 3ENABLE_FEATURE_DF_FANCY)) ENABLE_FEATURE_HUMAN_READABLE,
	OPT_MEGA = (1 << (6 + 3ENABLE_FEATURE_DF_FANCY)) ENABLE_FEATURE_HUMAN_READABLE,
	};
	const char *disp_units_hdr = NULL;
	char chp, opt_t;

	init_unicode();

	/* 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;

	opt = getopt32(argv, "^"
	"kPTt:"
	IF_FEATURE_DF_FANCY("aiB:")
	IF_FEATURE_HUMAN_READABLE("hHm")
	"\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
	, &opt_t
	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: ;
	}

	if (opt & (OPT_HUMAN\|OPT_HUMANDEC)) {
	df_disp_hr = 0;
	//TODO: need to add support in make_human_readable_str() for "decimal human readable"
	//if (opt & OPT_HUMANDEC)
	// df_disp_hr--;
	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
	disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr);
	#endif
	}

	printf("Filesystem %s%-15sUsed Available %s Mounted on\n",
	(opt & OPT_FSTYPE) ? "Type " : "",
	disp_units_hdr,
	(opt & OPT_POSIX) ? "Capacity" : "Use%");

	mount_table = NULL;
	argv += optind;
	if (!argv[0]) {
	mount_table = setmntent(bb_path_mtab_file, "r");
	if (!mount_table)
	bb_simple_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;
	}
	}

	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 (opt & OPT_t) {
	if (strcmp(fs_type, opt_t) != 0)
	continue;
	}

	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;

	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
	}
	}

	return status;
	}