Re: To get net ioctl number

[Iain Hibbert <plunky%ogmig.net@localhost>]

On Thu, 28 Feb 2019, Masanobu SAITOH wrote:

>  I'd like to get new number for new ioctl. How should I find unused number
> for it? I'm going to add new SIOCXXX. It may not enough to grep sys/net/*.h,
> so I made usr.bin/kdump-ioctl.c and did
> 
> 	grep \'i kdump-ioctl.c | sort -n -k 5,5 | uniq | column -t
> 
> I think it might not enough because kdump-ioctl.c has no compat-related
> code.
> 
>  What should I do?

In most cases, an ioctl value is only valid when performed on a handle 
leading to a specific subsystem, meaning that it does not really need to 
be globally distinct. There is a list of the letters used in ioctl(9)

iain