returned as the result of the call. This operation takes no argument. LOOP ... returned as the result of the call. If the device is already allocated, the callreturned as the result of the call. This operation takes no argument. LOOP ... returned as the result of the call. If the device is already allocated, the calltape block is written for each write call and the byte count determines the size ... written to the tape when the write call returns. It is set zero only whenlose their controlling tty. This ioctl (2) call works only on file descriptors connectedhardware can send, the write (2) call fails with the error EINVAL . Writing output with