NetBSD Problem Report #44498

From mouse@Sparkle.Rodents-Montreal.ORG  Mon Jan 31 13:31:11 2011
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Date: Mon, 31 Jan 2011 08:31:08 -0500 (EST)
From: der Mouse <mouse@Rodents-Montreal.ORG>
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Subject: [dM] tar unnecessarily demands wd name
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>Number:         44498
>Category:       bin
>Synopsis:       [dM] tar(1) unnecessarily demands that getcwd() work
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 31 13:35:00 +0000 2011
>Originator:     der Mouse
>Release:        NetBSD 4.0.1
	Probably any 4.0.1; noticed on
System: NetBSD Draupadi.Rodents-Montreal.ORG 4.0.1 NetBSD 4.0.1 (GEN401) #1: Mon Jan 17 04:14:49 EST 2011 mouse@Draupadi.Rodents-Montreal.ORG:/home/mouse/kbuild/GEN401 i386
Architecture: i386
Machine: i386
	Also seen on a 5.1 machine.
	tar(1) demands that it be able to determine its working
	directory.  This is problematic for normal use; it is
	particularly egregious when it happens even for operations such
	as "tar tvf -" that have nothing to do with filesystem access.

	This is a regression as compared to 1.4T; I no longer have
	anything in between to test with.  The same problem appears on
	morden (5.1_STABLE amd64).
	% mkdir foo foo/bar
	% chmod 111 foo
	% cd foo/bar
	% tar tvf -
	tar: Cannot get working directory (Permission denied)

	Notice in particular that tar does not even try to actually
	perform the operation indicated - it doesn't read anything
	before erroring out.
	Unknown.  Isn't our tar a product from elsewhere?  Then this
	probably would need a cluestick applied to the upstream
	maintainers - or for us to switch tar implementations.

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