Macro nix::request_code_write [−][src]
macro_rules! request_code_write {
($ty : expr, $nr : expr, $sz : expr) => { ... };
}
Expand description
Generate an ioctl request code for a command that writes.
This is equivalent to the _IOW()
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_write!()
directly.
The read/write direction is relative to userland, so this command would be userland is writing and the kernel is reading.