2 files changed, 226 insertions, 0 deletions

diff --git a/exfat/dump/dumpexfat.8 b/exfat/dump/dumpexfat.8
new file mode 100644
index 000000000..36fb28ad1
--- /dev/null
+++ b/exfat/dump/dumpexfat.8
@@ -0,0 +1,46 @@
+.\" Copyright (C) 2011  Andrew Nayenko
+.\"
+.TH DUMPEXFAT 8 "February 2011"
+.SH NAME
+.B dumpexfat
+\- dump exFAT file system
+.SH SYNOPSIS
+.B exfatlabel
+[
+.B \-s
+]
+[
+.B \-u
+]
+[
+.B \-v
+]
+.I device
+
+.SH DESCRIPTION
+.B dumpexfat
+dumps details about exFAT file system including low-level info. All sizes are
+in bytes.
+
+.SH OPTIONS
+Command line options available:
+.TP
+.B \-s
+Dump only info from super block. May be useful for heavily corrupted file
+systems.
+.TP
+.B \-u
+Dump ranges of used sectors starting from 0 and separated with spaces. May be
+useful for backup tools.
+.TP
+.BI \-v
+Print version and copyright.
+
+.SH EXIT CODES
+Zero is returned on success. Any other code means an error.
+
+.SH AUTHOR
+Andrew Nayenko
+
+.SH SEE ALSO
+.BR mkexfatfs (8)
diff --git a/exfat/dump/main.c b/exfat/dump/main.c
new file mode 100644
index 000000000..d7ea2a365
--- /dev/null
+++ b/exfat/dump/main.c
@@ -0,0 +1,180 @@
+/*
+	main.c (08.11.10)
+	Prints detailed information about exFAT volume.
+
+	Copyright (C) 2011, 2012  Andrew Nayenko
+
+	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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <exfat.h>
+
+static void print_generic_info(const struct exfat_super_block* sb)
+{
+	printf("Volume serial number      0x%08x\n",
+			le32_to_cpu(sb->volume_serial));
+	printf("FS version                       %hhu.%hhu\n",
+			sb->version.major, sb->version.minor);
+	printf("Sector size               %10u\n",
+			SECTOR_SIZE(*sb));
+	printf("Cluster size              %10u\n",
+			CLUSTER_SIZE(*sb));
+}
+
+static void print_sector_info(const struct exfat_super_block* sb)
+{
+	printf("Sectors count             %10"PRIu64"\n",
+			le64_to_cpu(sb->sector_count));
+}
+
+static void print_cluster_info(const struct exfat_super_block* sb)
+{
+	printf("Clusters count            %10u\n",
+			le32_to_cpu(sb->cluster_count));
+}
+
+static void print_other_info(const struct exfat_super_block* sb)
+{
+	printf("First sector              %10"PRIu64"\n",
+			le64_to_cpu(sb->sector_start));
+	printf("FAT first sector          %10u\n",
+			le32_to_cpu(sb->fat_sector_start));
+	printf("FAT sectors count         %10u\n",
+			le32_to_cpu(sb->fat_sector_count));
+	printf("First cluster sector      %10u\n",
+			le32_to_cpu(sb->cluster_sector_start));
+	printf("Root directory cluster    %10u\n",
+			le32_to_cpu(sb->rootdir_cluster));
+	printf("Volume state                  0x%04hx\n",
+			le16_to_cpu(sb->volume_state));
+	printf("FATs count                %10hhu\n",
+			sb->fat_count);
+	printf("Drive number                    0x%02hhx\n",
+			sb->drive_no);
+	printf("Allocated space           %9hhu%%\n",
+			sb->allocated_percent);
+}
+
+static int dump_sb(const char* spec)
+{
+	struct exfat_dev* dev;
+	struct exfat_super_block sb;
+
+	dev = exfat_open(spec, EXFAT_MODE_RO);
+	if (dev == NULL)
+		return 1;
+
+	if (exfat_read(dev, &sb, sizeof(struct exfat_super_block)) < 0)
+	{
+		exfat_close(dev);
+		exfat_error("failed to read from `%s'", spec);
+		return 1;
+	}
+	if (memcmp(sb.oem_name, "EXFAT   ", sizeof(sb.oem_name)) != 0)
+	{
+		exfat_close(dev);
+		exfat_error("exFAT file system is not found on `%s'", spec);
+		return 1;
+	}
+
+	print_generic_info(&sb);
+	print_sector_info(&sb);
+	print_cluster_info(&sb);
+	print_other_info(&sb);
+
+	exfat_close(dev);
+	return 0;
+}
+
+static void dump_sectors(struct exfat* ef)
+{
+	off_t a = 0, b = 0;
+
+	printf("Used sectors ");
+	while (exfat_find_used_sectors(ef, &a, &b) == 0)
+		printf(" %"PRIu64"-%"PRIu64, a, b);
+	puts("");
+}
+
+static int dump_full(const char* spec, bool used_sectors)
+{
+	struct exfat ef;
+	uint32_t free_clusters;
+	uint64_t free_sectors;
+
+	if (exfat_mount(&ef, spec, "ro") != 0)
+		return 1;
+
+	free_clusters = exfat_count_free_clusters(&ef);
+	free_sectors = (uint64_t) free_clusters << ef.sb->spc_bits;
+
+	printf("Volume label         %15s\n", exfat_get_label(&ef));
+	print_generic_info(ef.sb);
+	print_sector_info(ef.sb);
+	printf("Free sectors              %10"PRIu64"\n", free_sectors);
+	print_cluster_info(ef.sb);
+	printf("Free clusters             %10u\n", free_clusters);
+	print_other_info(ef.sb);
+	if (used_sectors)
+		dump_sectors(&ef);
+
+	exfat_unmount(&ef);
+	return 0;
+}
+
+static void usage(const char* prog)
+{
+	fprintf(stderr, "Usage: %s [-s] [-u] [-v] <device>\n", prog);
+	exit(1);
+}
+
+int main(int argc, char* argv[])
+{
+	char** pp;
+	const char* spec = NULL;
+	bool sb_only = false;
+	bool used_sectors = false;
+
+	printf("dumpexfat %u.%u.%u\n",
+			EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+
+	for (pp = argv + 1; *pp; pp++)
+	{
+		if (strcmp(*pp, "-s") == 0)
+			sb_only = true;
+		else if (strcmp(*pp, "-u") == 0)
+			used_sectors = true;
+		else if (strcmp(*pp, "-v") == 0)
+		{
+			puts("Copyright (C) 2011, 2012  Andrew Nayenko");
+			return 0;
+		}
+		else if (spec == NULL)
+			spec = *pp;
+		else
+			usage(argv[0]);
+	}
+	if (spec == NULL)
+		usage(argv[0]);
+
+	if (sb_only)
+		return dump_sb(spec);
+
+	return dump_full(spec, used_sectors);
+}