filetype: add fat filesystem support
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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@ -22,6 +22,7 @@
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#include <common.h>
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#include <filetype.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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#include <fcntl.h>
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#include <fs.h>
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#include <malloc.h>
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@ -40,6 +41,7 @@ static const char *filetype_str[] = {
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[filetype_aimage] = "Android boot image",
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[filetype_sh] = "Bourne Shell",
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[filetype_mips_barebox] = "MIPS barebox image",
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[filetype_fat] = "FAT filesytem",
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};
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const char *file_type_to_string(enum filetype f)
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@ -50,6 +52,22 @@ const char *file_type_to_string(enum filetype f)
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return NULL;
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}
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static int is_fat(u8 *buf)
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{
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if (get_unaligned_le16(&buf[510]) != 0xAA55)
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return 0;
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/* FAT */
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if ((get_unaligned_le32(&buf[54]) & 0xFFFFFF) == 0x544146)
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return 1;
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/* FAT32 */
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if ((get_unaligned_le32(&buf[82]) & 0xFFFFFF) == 0x544146)
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return 1;
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return 0;
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}
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enum filetype file_detect_type(void *_buf)
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{
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u32 *buf = _buf;
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@ -81,6 +99,8 @@ enum filetype file_detect_type(void *_buf)
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return filetype_aimage;
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if (strncmp(buf8 + 0x10, "barebox", 7) == 0)
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return filetype_mips_barebox;
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if (is_fat(buf8))
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return filetype_fat;
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return filetype_unknown;
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}
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@ -18,6 +18,7 @@ enum filetype {
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filetype_aimage,
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filetype_sh,
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filetype_mips_barebox,
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filetype_fat,
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};
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const char *file_type_to_string(enum filetype f);
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