Add libtar to TWRP instead of using busybox tar
Add proper mkdosfs tool
Add fuse to TWRP
Add experimental exfat-fuse to TWRP
Convert all system() functions to use new Exec_Cmd function
diff --git a/exfat/libexfat/utils.c b/exfat/libexfat/utils.c
new file mode 100644
index 0000000..14b4791
--- /dev/null
+++ b/exfat/libexfat/utils.c
@@ -0,0 +1,176 @@
+/*
+ utils.c (04.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2010-2012 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 "exfat.h"
+#include <string.h>
+#include <stdio.h>
+#include <inttypes.h>
+
+void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
+ struct stat* stbuf)
+{
+ memset(stbuf, 0, sizeof(struct stat));
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ stbuf->st_mode = S_IFDIR | (0777 & ~ef->dmask);
+ else
+ stbuf->st_mode = S_IFREG | (0777 & ~ef->fmask);
+ stbuf->st_nlink = 1;
+ stbuf->st_uid = ef->uid;
+ stbuf->st_gid = ef->gid;
+ stbuf->st_size = node->size;
+ stbuf->st_blocks = DIV_ROUND_UP(node->size, CLUSTER_SIZE(*ef->sb)) *
+ CLUSTER_SIZE(*ef->sb) / 512;
+ stbuf->st_mtime = node->mtime;
+ stbuf->st_atime = node->atime;
+ /* set ctime to mtime to ensure we don't break programs that rely on ctime
+ (e.g. rsync) */
+ stbuf->st_ctime = node->mtime;
+}
+
+void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n)
+{
+ if (utf16_to_utf8(buffer, node->name, n, EXFAT_NAME_MAX) != 0)
+ exfat_bug("failed to convert name to UTF-8");
+}
+
+uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry)
+{
+ uint16_t sum = 0;
+ int i;
+
+ for (i = 0; i < sizeof(struct exfat_entry); i++)
+ if (i != 2 && i != 3) /* skip checksum field itself */
+ sum = ((sum << 15) | (sum >> 1)) + ((const uint8_t*) entry)[i];
+ return sum;
+}
+
+uint16_t exfat_add_checksum(const void* entry, uint16_t sum)
+{
+ int i;
+
+ for (i = 0; i < sizeof(struct exfat_entry); i++)
+ sum = ((sum << 15) | (sum >> 1)) + ((const uint8_t*) entry)[i];
+ return sum;
+}
+
+le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
+ const struct exfat_entry_meta2* meta2, const le16_t* name)
+{
+ uint16_t checksum;
+ const int name_entries = DIV_ROUND_UP(utf16_length(name), EXFAT_ENAME_MAX);
+ int i;
+
+ checksum = exfat_start_checksum(meta1);
+ checksum = exfat_add_checksum(meta2, checksum);
+ for (i = 0; i < name_entries; i++)
+ {
+ struct exfat_entry_name name_entry = {EXFAT_ENTRY_FILE_NAME, 0};
+ memcpy(name_entry.name, name + i * EXFAT_ENAME_MAX,
+ EXFAT_ENAME_MAX * sizeof(le16_t));
+ checksum = exfat_add_checksum(&name_entry, checksum);
+ }
+ return cpu_to_le16(checksum);
+}
+
+uint32_t exfat_vbr_start_checksum(const void* sector, size_t size)
+{
+ size_t i;
+ uint32_t sum = 0;
+
+ for (i = 0; i < size; i++)
+ /* skip volume_state and allocated_percent fields */
+ if (i != 0x6a && i != 0x6b && i != 0x70)
+ sum = ((sum << 31) | (sum >> 1)) + ((const uint8_t*) sector)[i];
+ return sum;
+}
+
+uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum)
+{
+ size_t i;
+
+ for (i = 0; i < size; i++)
+ sum = ((sum << 31) | (sum >> 1)) + ((const uint8_t*) sector)[i];
+ return sum;
+}
+
+le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name)
+{
+ size_t i;
+ size_t length = utf16_length(name);
+ uint16_t hash = 0;
+
+ for (i = 0; i < length; i++)
+ {
+ uint16_t c = le16_to_cpu(name[i]);
+
+ /* convert to upper case */
+ if (c < ef->upcase_chars)
+ c = le16_to_cpu(ef->upcase[c]);
+
+ hash = ((hash << 15) | (hash >> 1)) + (c & 0xff);
+ hash = ((hash << 15) | (hash >> 1)) + (c >> 8);
+ }
+ return cpu_to_le16(hash);
+}
+
+void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb)
+{
+ size_t i;
+ /* 16 EB (minus 1 byte) is the largest size that can be represented by
+ uint64_t */
+ const char* units[] = {"bytes", "KB", "MB", "GB", "TB", "PB", "EB"};
+ uint64_t divisor = 1;
+ uint64_t temp = 0;
+
+ for (i = 0; ; i++, divisor *= 1024)
+ {
+ temp = (value + divisor / 2) / divisor;
+
+ if (temp == 0)
+ break;
+ if (temp / 1024 * 1024 == temp)
+ continue;
+ if (temp < 10240)
+ break;
+ }
+ hb->value = temp;
+ hb->unit = units[i];
+}
+
+void exfat_print_info(const struct exfat_super_block* sb,
+ uint32_t free_clusters)
+{
+ struct exfat_human_bytes hb;
+ off64_t total_space = le64_to_cpu(sb->sector_count) * SECTOR_SIZE(*sb);
+ off64_t avail_space = (off64_t) free_clusters * CLUSTER_SIZE(*sb);
+
+ printf("File system version %hhu.%hhu\n",
+ sb->version.major, sb->version.minor);
+ exfat_humanize_bytes(SECTOR_SIZE(*sb), &hb);
+ printf("Sector size %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(CLUSTER_SIZE(*sb), &hb);
+ printf("Cluster size %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(total_space, &hb);
+ printf("Volume size %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(total_space - avail_space, &hb);
+ printf("Used space %10"PRIu64" %s\n", hb.value, hb.unit);
+ exfat_humanize_bytes(avail_space, &hb);
+ printf("Available space %10"PRIu64" %s\n", hb.value, hb.unit);
+}