>Number:         202
>Category:       kern
>Synopsis:       create in union filesystem writes-through to lower fs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    gnats-admin (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Apr  6 05:50:08 1994
>Originator:     Bob Kemp
>Organization:
	ECS Dept, Southampton University, UK
>Release:        -current 05Mar94
>Environment:
System: NetBSD allegory 0.9a ALLEGORY#0 i386

>Description:

	The man page says that creates in a union filesystem only
	affect the mounted filesystem.  When the create is in a
	subdirectory, it is erroneously done in the underlying
	filesystem.

	Perhaps this is more an error in the phrasing of the manual page.

	[ I expected something (a little) like Sun's TFS and I can't now
	see many applications for this simpler union filesystem. Ho hum,
	the rest of the system is great anyway (:-) ]

>How-To-Repeat:


	Script started on Mon Apr  4 19:45:22 1994
	#  mount -o union /dev/vnd0c /usr
	#  cd /usr
	#  ls
	SOFT-ERROR	bin/		libexec/	obj/		share/
	X386/		include/	local/		ports/		src/
	allegory@	lib/		mdec/		sbin/
	#  df . hosts bin/hosts
	Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
	/dev/vnd0c       1283       0    1218     0%    /usr
	df: hosts: No such file or directory
	df: bin/hosts: No such file or directory
	#  cp /etc/hosts .
	#  df . hosts bin/hosts
	Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
	/dev/vnd0c       1283       2    1216     0%    /usr
	/dev/vnd0c       1283       2    1216     0%    /usr
	df: bin/hosts: No such file or directory
	#  
	#  cp hosts bin/hosts
	#  df . hosts bin/hosts
	Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
	/dev/vnd0c       1283       2    1216     0%    /usr
	/dev/vnd0c       1283       2    1216     0%    /usr
	/dev/wd0f       76403   69246    4864    93%    /usr
	#  df bin/hosts
	Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
	/dev/wd0f       76403   69246    4864    93%    /usr
	#  cd /
	#  umount /usr
	#  cd /usr
	#  df bin/hosts
	Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
	/dev/wd0f       76403   69246    4864    93%    /usr
	#  rm bin/hosts
	#  ls
	SOFT-ERROR	bin/		libexec/	obj/		share/
	X386/		include/	local/		ports/		src/
	allegory@	lib/		mdec/		sbin/
	#  
	#  exit
	
	Script done on Mon Apr  4 19:48:06 1994


>Fix:
>Audit-Trail:
>Unformatted:

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