linux-kernel - Re: wierd file perms

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Date:	Sun, 14 Oct 2007 16:05:01 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Mark Lord <lkml@....ca>
cc:	vignesh babu <vigneshbabu@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: wierd file perms


On Oct 14 2007 09:27, Mark Lord wrote:
> Jan-Benedict Glaw wrote:
>> On Sat, 2007-10-13 22:40:23 +0530, vignesh babu <vigneshbabu@...il.com>
>> wrote:
>> > I was surprised and did an ls -l on the files and guess what I found:
>> >
>> > total 0
>> > ?--------- ? ? ? ?                ? fcntl.c
>> > ?--------- ? ? ? ?                ? fifo.c
>> > ?--------- ? ? ? ?                ? filesystems.c
>> > ?--------- ? ? ? ?                ? file_table.c
>> > ?--------- ? ? ? ?                ? freevxfs
>> >
>> > So end result is that, Im not able to delete the files or change perms
>> > or ownership even as root.
>> 
>> Most probably, your filesystem is broken and needs a fsck.
>
> No, this is perfectly normal behaviour, for when a directory
> has READ permissions but not EXECUTE permissions.

Er, close.

	16:02 ichi:/dev/shm > md a
	16:02 ichi:/dev/shm > touch a/b
	16:02 ichi:/dev/shm > chmod 644 a
	16:02 ichi:/dev/shm > ls -l a
	/bin/ls: cannot access a/b: Permission denied
	total 0
	-????????? ? ? ? ?            ? b
	16:02 ichi:/dev/shm > ls --version
	ls (GNU coreutils) 6.9


There is a difference ..  "-?????????" vs "?---------".

The first looks to me like "filetype known (S_IFREG)",
while the latter is "filetype and mode unknown".


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