[ECOS] FAT FS Dir Entry Structure Format

["Ramana B.V" <ramana_b_v at hotmail dot com>]

Hi
We have the Fat FS of Ecos working on our unit. Everything seems to be 
owrking OK.
However the Directory entry seems to be using the follwoing structure

typedef struct fatfs_dir_entry_s
{
   char              filename[12+1]; // File name
   mode_t            mode;           // Node type
   size_t            size;           // Size of file in bytes
   time_t            ctime;          // Creation timestamp
   time_t            atime;          // Last access timestamp
   time_t            mtime;          // Last write timestamp
   cyg_uint8         priv_data;      // Private data
   cyg_uint32        cluster;        // First cluster number
   cyg_uint32        parent_cluster; // First cluster of parent dentry
   fatfs_data_pos_t  disk_pos;       // Position of dir entry on disk
#ifdef CYGCFG_FS_FAT_USE_ATTRIBUTES
   cyg_fs_attrib_t    attrib;     // Attribute bits for DOS compatability
#endif //CYGCFG_FS_FAT_USE_ATTRIBUTES
} fatfs_dir_entry_t;


1. The size is 36 bytes and I haven't come across any definition for 36 
Bytes any where. Can soemone help in identifying why this is so

2. I am able to format and populate the Disk ( Through USB Mass storage) and 
then read the files through ecos file system. So it looks as if there is 
compatibility. However there is no DOS Fat specification mentioning this 
type of Directory Entry

3. If we use Long file names ( Not supported under ECOS FAT) then the names 
are being stored in a very funny way.



Has any one come across a directory entry definition for long files names 
using 36 byte directory entry.
I am only seeing a definition for 32 bytes Directory entry


Thanks in advance
Regards
Ramana B.V

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