msdosfs: Add a define of 0x28 as extended boot record signature.

As per http://support.microsoft.com/kb/140418 (Detailed Explanation
of FAT Boot Sector), the "...extended boot record signature must be
either 0x28 or 0x29...".

diff --git a/sys/vfs/msdosfs/bootsect.h b/sys/vfs/msdosfs/bootsect.h
index acc51f6..70dcea5 100644 (file)
--- a/sys/vfs/msdosfs/bootsect.h
+++ b/sys/vfs/msdosfs/bootsect.h
@@ -40,6 +40,7 @@ struct extboot {
        int8_t          exReserved1;            /* reserved */
        int8_t          exBootSignature;        /* ext. boot signature (0x29) */
 #define        EXBOOTSIG       0x29
+#define        EXBOOTSIG2      0x28
        int8_t          exVolumeID[4];          /* volume ID number */
        int8_t          exVolumeLabel[11];      /* volume label */
        int8_t          exFileSysType[8];       /* fs type (FAT12 or FAT16) */