Macro nix::request_code_read [−][src]
Generate an ioctl request code for a command that reads.
This is equivalent to the _IOR()
macro exposed by the C ioctl API.
You should only use this macro directly if the ioctl
you’re working
with is “bad” and you cannot use ioctl_read!()
directly.
The read/write direction is relative to userland, so this command would be userland is reading and the kernel is writing.