calculate the LFN checksum byte ?

Hi everyone,

I wonder how to calculate the long file name checksum byte that verify if
the 8.3 filename is valid ?

According to PC Magzine June 25 1996 - How Windows 95 Stores Long
Flenames by Jeff Prosise

"The LFN directory entry's checksum byte holds an eight-bit checksum value computed by adding certain fields of the 8.3 directory entry and performing a modulo 256 operation on the result. Windows 95 uses this checksum to detect orphaned or corrupted LFN directory entries."

Best regards

Who is Participating?
strobertConnect With a Mentor Commented:
try looking at the linux kernel code (available via FTP from many places including  the dir fs/vfat should have the code.
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