Truncate file on certain size.
Source position: bunxh.inc line 94
function FpFtruncate(
fd: cint ;
flength: TOff
):cint ;
FpFTruncate sets the length of a file in fd on flength bytes, where flength must be less than or equal to the current length of the file in fd.
The function returns zero if the call was successful, a nonzero return value indicates that an error occurred.
Extended error information can be retrieved using fpGetErrno.
Open file and return file descriptor
Close file descriptor
Read data from file descriptor
Write data to file descriptor
Set file pointer position.