>Number:         3205
>Category:       kern
>Synopsis:       mount_union with a '/' suffix to directory causes problems
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 10 05:35:02 1997
>Last-Modified:
>Originator:     David Brownlee
>Organization:
Monochrome <a href="http://www.mono.org/">Monochrome</a>
>Release:        1.2
>Environment:
	
System: NetBSD alpha.mhm-internet.com 1.2 NetBSD 1.2 (_ALPHA_) #1: Thu Sep 19 16:09:55 BST 1996 root@:/usr/src/sys/arch/i386/compile/_ALPHA_ i386


>Description:
	Specifying amount point with a trailing / will stop you from being able
	to unmount it later.

>How-To-Repeat:
	# mkdir /tmp/a /tmp/b
	# mount_union /tmp/a /tmp/b		(Mount ok)
	# umount /tmp/b				(Umount ok)
	# mount_union /tmp/a /tmp/b/		(Mount ok)
	# umount /tmp/b	
	umount: /tmp/b: not currently mounted	
	# umount /tmp/b/
	umount: /tmp/b: not currently mounted
	# umount -vat union			
	umount: /tmp/b: not currently mounted
>Fix:
	Either change mount_union and friends to strip trailing '/' from
	directories, or change the lookups to permit the umount to work.
>Audit-Trail:
>Unformatted: