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.
