re: To get net ioctl number

[matthew green <mrg%eterna.com.au@localhost>]

Iain Hibbert writes:
> 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)

true that that don't _need_ to be globally unique, but it sure
is nice for kdump(1).


.mrg.