* The x Bit Problem
[not found] ` <3FD00086.90607@ninja.dynup.net>
@ 2003-12-05 5:24 ` Grant Miner
2003-12-05 8:07 ` Bob
2003-12-05 12:44 ` Hans Reiser
0 siblings, 2 replies; 5+ messages in thread
From: Grant Miner @ 2003-12-05 5:24 UTC (permalink / raw)
To: reiserfs-list; +Cc: linux-kernel
An interesting thing I discovered is that Windows simply ignores the 'x'
bit (I should say the Windows equivalent of the 'x' bit, called
"traverse folder / execute file"), but there is a policy setting that
overrides this attribute.
I know users get tripped up on this a lot in Unix, like when they don't
understand why the webserver can't read their public_html directory. It
might be a good option for Linux.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: The x Bit Problem
2003-12-05 5:24 ` The x Bit Problem Grant Miner
@ 2003-12-05 8:07 ` Bob
2003-12-05 12:30 ` Tomasz Rola
2003-12-05 12:44 ` Hans Reiser
1 sibling, 1 reply; 5+ messages in thread
From: Bob @ 2003-12-05 8:07 UTC (permalink / raw)
To: linux-kernel
Grant Miner wrote:
> An interesting thing I discovered is that Windows simply ignores the
> 'x' bit (I should say the Windows equivalent of the 'x' bit, called
> "traverse folder / execute file"), but there is a policy setting that
> overrides this attribute.
>
> I know users get tripped up on this a lot in Unix, like when they
> don't understand why the webserver can't read their public_html
> directory. It might be a good option for Linux.
>
> -
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>
Windows doesn't just ignore it. When I move
files from win to linux all the x bits are turned
on so txt and bz2 and jpg files are marked
executable. That's annoying and a security
risk.
-Bob
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: The x Bit Problem
2003-12-05 8:07 ` Bob
@ 2003-12-05 12:30 ` Tomasz Rola
2003-12-05 14:04 ` Tomasz Rola
0 siblings, 1 reply; 5+ messages in thread
From: Tomasz Rola @ 2003-12-05 12:30 UTC (permalink / raw)
To: Bob; +Cc: linux-kernel, Tomasz Rola
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On Fri, 5 Dec 2003, Bob wrote:
> Windows doesn't just ignore it. When I move
> files from win to linux all the x bits are turned
> on so txt and bz2 and jpg files are marked
> executable. That's annoying and a security
> risk.
I'm jumping into this thread so this might have already been told but how
about umask=0111 mount option for dos (fat,vfat etc) filesystems? Also,
one may mount nodev, noexec and nosuid when appropriate. This, of course,
is not remedy, just a little painkiller.
bye
T.
- --
** A C programmer asked whether computer had Buddha's nature. **
** As the answer, master did "rm -rif" on the programmer's home **
** directory. And then the C programmer became enlightened... **
** **
** Tomasz Rola mailto:tomasz_rola@bigfoot.com **
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: The x Bit Problem
2003-12-05 5:24 ` The x Bit Problem Grant Miner
2003-12-05 8:07 ` Bob
@ 2003-12-05 12:44 ` Hans Reiser
1 sibling, 0 replies; 5+ messages in thread
From: Hans Reiser @ 2003-12-05 12:44 UTC (permalink / raw)
To: Grant Miner; +Cc: reiserfs-list, linux-kernel
Grant Miner wrote:
> An interesting thing I discovered is that Windows simply ignores the
> 'x' bit (I should say the Windows equivalent of the 'x' bit, called
> "traverse folder / execute file"), but there is a policy setting that
> overrides this attribute.
>
> I know users get tripped up on this a lot in Unix, like when they
> don't understand why the webserver can't read their public_html
> directory. It might be a good option for Linux.
>
>
>
The right solution is to have a separate readdir permission, so that a
file-directory can be not executable but be listable, and vice-versa.
The problem comes from overloading the bit and also changing whether
objects can be simultaneously files and directories.
--
Hans
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: The x Bit Problem
2003-12-05 12:30 ` Tomasz Rola
@ 2003-12-05 14:04 ` Tomasz Rola
0 siblings, 0 replies; 5+ messages in thread
From: Tomasz Rola @ 2003-12-05 14:04 UTC (permalink / raw)
To: Bob; +Cc: linux-kernel, Tomasz Rola
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On Fri, 5 Dec 2003, Tomasz Rola wrote:
> On Fri, 5 Dec 2003, Bob wrote:
>
> > Windows doesn't just ignore it. When I move
> > files from win to linux all the x bits are turned
> > on so txt and bz2 and jpg files are marked
> > executable. That's annoying and a security
> > risk.
>
> I'm jumping into this thread so this might have already been told but how
> about umask=0111 mount option for dos (fat,vfat etc) filesystems? Also,
And I'm answering to myself.
Nope. But with showexec=no it seems that only dirs and *.exe are x-ed.
Writing faster than light isn't good because humans think slower than
light...
bye
T.
- --
** A C programmer asked whether computer had Buddha's nature. **
** As the answer, master did "rm -rif" on the programmer's home **
** directory. And then the C programmer became enlightened... **
** **
** Tomasz Rola mailto:tomasz_rola@bigfoot.com **
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2003-12-05 5:24 ` The x Bit Problem Grant Miner
2003-12-05 8:07 ` Bob
2003-12-05 12:30 ` Tomasz Rola
2003-12-05 14:04 ` Tomasz Rola
2003-12-05 12:44 ` Hans Reiser
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