INTERFACE1 for TRUE, 0 for FALSE, -1 for error (in errno)FilePosixC ; FROM Ctypes IMPORT int;
<*EXTERNAL "FilePosixC__RegularFileLock"*> PROCEDURE RegularFileLock(fd: int): INTEGER;return value from fcntl; <0 for failure, error in errno
<*EXTERNAL "FilePosixC__RegularFileUnlock"*> PROCEDURE RegularFileUnlock(fd: int): INTEGER; END FilePosixC.