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#include <io.h> int _dos_unlk64(int fd, long long offset, long long length);
Removes an advisory lock to the specified region of the file.
Arguments offset and length must be of type long
long
, thus enabling you to unlock with offsets and lengths as large as
~2^63 (FAT16 limits this to ~2^31; FAT32 limits this to
2^32-2).
See section _dos_lk64.
Zero if the lock was removed, nonzero otherwise.
not ANSI, not POSIX
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