Re: [alsa-devel] [PATCH 2/4] ALSA: seq: add an alternative way to handle ioctl requests

Takashi Sakamoto wrote:

• if (_IOC_DIR(handler->cmd) == IOC_IN) {

...

•     _IOC_DIR(handler->cmd) == IOC_OUT)
  

_IOC_DIR() returns a bit mask in which both _IOC_READ and _IOC_WRITE can be set. IOC_IN, IOC_OUT, and IOC_INOUT are shifted values. (see include/uapi/asm-generic/ioctl.h)

Regards, Clemens