>Number:         11515
>Category:       kern
>Synopsis:       vnconfig requires reqd/write access to the file
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 18 07:31:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     Robert Elz
>Release:        NetBSD-1.5_BETA
>Organization:
	University of Melbourne
>Environment:
	
System: NetBSD brandenburg.cs.mu.OZ.AU 1.5_BETA NetBSD 1.5_BETA (GATEWAY) #2: Thu Oct 26 05:55:17 EST 2000 root@:/usr/src/sys/arch/i386/compile/GATEWAY i386


>Description:
	vnconfig (the vnd pseudo-device) requires read-write
	access to the underlying file.   It shouldn't.

>How-To-Repeat:

	Accidentally write an iso inage as a file into a CD, instead
	of using the image file as the CD (ie: the CD ends up containing
	a single file, file.iso) - attempt to use vnd0 to access the
	contents of the file (before writing to the CD the file could
	be accessed that way).

	Observe...

	mount -r -t cd9660 /dev/cd0a /cdrom
	cd /cdrom
	vnconfig -c vnd0 file.iso
	vnconfig: /dev/rvnd0d: VNDIOCSET: Read-only file system

	If the underlying file is read-only (or on a read only device)
	the vnd interface should simply make a read-only device

>Fix:
	Sorry...
>Release-Note:
>Audit-Trail:
>Unformatted: