> From: matthew green <mrg@eterna.com.au>
> Date: Tue, 07 Nov 1995 01:07:46 +1100

> eeek!
> 
> be _sure_ to update /sbin/mount and /sbin/mount_ffs before
> rebooting with a new kernel... or else you won't be able to
> mount any file systems.
> 
> just a warning from someone still suffereing from a *bite*
> 
> .mrg.

Actually, it is very easy to make the kernel compatible with
old (1.0) versions of mount.  John Kohl posted one way, and
then I came up with a much simpler way.  Here it is:

cd /usr/src/sys
diff -rc kern.orig kern
diff -rc kern.orig/vfs_syscalls.c kern/vfs_syscalls.c
*** kern.orig/vfs_syscalls.c	Fri Oct 13 22:42:05 1995
--- kern/vfs_syscalls.c	Mon Nov  6 15:13:50 1995
***************
*** 184,189 ****
--- 184,195 ----
  		return (error);
  #endif
  	}
+ #ifdef	COMPAT_10
+ 	/* Accept "ufs" as a synonym for "ffs" */
+ 	if (!strncmp(fstypename, "ufs", MFSNAMELEN)) {
+ 		strncpy( fstypename, "ffs", MFSNAMELEN);
+ 	}
+ #endif
  	for (fsindex = 0; fsindex < nvfssw; fsindex++)
  		if (vfssw[fsindex] != NULL &&
  		    !strncmp(vfssw[fsindex]->vfs_name, fstypename, MFSNAMELEN))