ioctl NAME ioctl - IO control on file descriptor SYNOPSIS int r = ioctl(fd, req, parg1, parg2); int fd; int req; int *parg1; int *parg2; FUNCTION execute an IO control on the file descriptor. Currently no IO controls are implemented. EXAMPLE INPUTS int fd; file descriptor int req; request from <ioctl.h> int *parg1; address of argument #1 int *parg2; address of argument #2 RESULTS int r; result, error if < 0.