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