hi,

there was a discussion on tech-kern some time back where the 
consensus was that this shouldn't be a mount option,
but rather a system-wide tunable.  I think this should be
backed out from the 3.x branch until those changes are made,
to avoid further compatibility problems.

do you need a REQ ticket for this?

-Chuck


On Thu, Dec 29, 2005 at 12:57:10AM +0000, Jeff Rizzo wrote:
> 
> Module Name:	src
> Committed By:	riz
> Date:		Thu Dec 29 00:57:09 UTC 2005
> 
> Modified Files:
> 	src/include [netbsd-3]: mntopts.h
> 	src/lib/libc/sys [netbsd-3]: mount.2
> 	src/sbin/mount [netbsd-3]: mount.8
> 	src/share/man/man4 [netbsd-3]: options.4
> 	src/share/man/man7 [netbsd-3]: symlink.7
> 	src/sys/conf [netbsd-3]: files newvers.sh
> 	src/sys/kern [netbsd-3]: init_main.c vfs_lookup.c vfs_syscalls.c
> 	src/sys/sys [netbsd-3]: fstypes.h systm.h
> 
> Log Message:
> Pull up following revision(s) (requested by thorpej in ticket #490):
> 	lib/libc/sys/mount.2: revision 1.33
> 	sys/sys/systm.h: revision 1.179
> 	sys/sys/fstypes.h: revision 1.4
> 	include/mntopts.h: revision 1.6
> 	sys/conf/newvers.sh: revision 1.41
> 	sys/kern/vfs_syscalls.c: revision 1.223
> 	sys/conf/files: revision 1.720
> 	sys/kern/vfs_lookup.c: revision 1.61
> 	share/man/man7/symlink.7: revision 1.7
> 	sbin/mount/mount.8: revision 1.47
> 	sys/kern/init_main.c: revision 1.248 via patch
> 	share/man/man4/options.4: revision 1.280 via patch
> Implement expansion of special "magic" strings in symlinks into
> system-specific values.  Submitted by Chris Demetriou in Nov 1995 (!)
> in PR kern/1781, modified only slighly by me.
> This is enabled on a per-mount basis with the MNT_MAGICLINKS mount
> flag.  It can be enabled at mountroot() time by building the kernel
> with the ROOTFS_MAGICLINKS option.
> The following magic strings are supported by the implementation:
> @machine    value of MACHINE for the system
> @machine_arch    value of MACHINE_ARCH for the system
> @hostname    the system host name, as set with sethostname()
> @domainname    the system domain name, as set with setdomainname()
> @kernel_ident    the kernel config file name
> @osrelease    the releaes number of the OS
> @ostype        the name of the OS (always "NetBSD" for NetBSD)
> Example usage:
> mkdir /arch/i386/bin
> mkdir /arch/sparc/bin
> ln -s /arch/@machine_arch/bin /bin
> 
> 
> To generate a diff of this commit:
> cvs rdiff -r1.5 -r1.5.2.1 src/include/mntopts.h
> cvs rdiff -r1.32 -r1.32.2.1 src/lib/libc/sys/mount.2
> cvs rdiff -r1.46 -r1.46.2.1 src/sbin/mount/mount.8
> cvs rdiff -r1.268.2.4 -r1.268.2.5 src/share/man/man4/options.4
> cvs rdiff -r1.6 -r1.6.6.1 src/share/man/man7/symlink.7
> cvs rdiff -r1.712.2.5 -r1.712.2.6 src/sys/conf/files
> cvs rdiff -r1.40 -r1.40.4.1 src/sys/conf/newvers.sh
> cvs rdiff -r1.244.6.4 -r1.244.6.5 src/sys/kern/init_main.c
> cvs rdiff -r1.57 -r1.57.2.1 src/sys/kern/vfs_lookup.c
> cvs rdiff -r1.217.2.7 -r1.217.2.8 src/sys/kern/vfs_syscalls.c
> cvs rdiff -r1.3 -r1.3.10.1 src/sys/sys/fstypes.h
> cvs rdiff -r1.175 -r1.175.4.1 src/sys/sys/systm.h
> 
> Please note that diffs are not public domain; they are subject to the
> copyright notices on the relevant files.