Subject: Re: sysctl (was usr.sbin/route6d, or sbin/route6d)
To: Simon Burge <>
From: None <>
List: tech-net
Date: 01/11/2000 00:33:52
>> >	- I think we really need to move sysctl into /sbin.  are you guys
>> >	  happy with it?
>> 	just a list of facts:
>> 	/sbin/sysctl: openbsd-current freebsd(all) bsdi41
>> 	/usr/sbin/sysctl: netbsd(all) openbsd26
>What would be really nice is to have the sysctls looked up by
>the kernel.  This way sysctl(8) doesn't grow, and doesn't need
>to be recompiled when a new sysctl is added.  Doesn't FreeBSD
>do something like this?  A _quick_ scan through the archives
>doesn't reveal any recent discussion on this...

	freebsd camp is using linker hack for them.
	for example,
	- in sys/netinet/ip_icmp.c, declare leaf node as:
		SYSCTL_INT(_net_inet_icmp, OID_AUTO, log_redirect, CTLFLAG_RW, 
			&log_redirect, 0, "");
	- it will put certain symbol into the kernel, like:
>c025c60c r __set_sysctl__net_inet_icmp_sym_sysctl___net_inet_icmp_log_redirect
	- sys/sysctl.h has #define SYSCTL_INT() foobaa.

	Though I think I like the idea of having sysctl table definition in
	single place, I hate the way it is implemented in freebsd (if
	you forget to include sys/sysctl.h you will be in trouble which is
	VERY hard to track down).  I prefer the current netbsd way than
	freebsd way.