trick question about sudo
Luciano Rocha
strange at nsk.no-ip.org
Mon Feb 18 18:46:44 UTC 2008
On Mon, Feb 18, 2008 at 07:43:09PM +0100, Valent Turkovic wrote:
> Hi,
> I have one question about sudo.
>
> While looking for uid/gid override for samba mounts I found this solution:
> sudo echo 0 > /proc/fs/cifs/LinuxExtensionsEnabled
>
> But this obviously doesn't work on Fedora but this works:
> sudo sh -c 'echo 0 > /proc/fs/cifs/LinuxExtensionsEnabled'
>
> But the trick question is in which setups and which circumstances can
> the first sudo work?
Only when your current user (not the one you're sudoing to) can write
to /proc/fs/cifs/LinuxExtensionsEnabled.
The redirection is made by the shell, before running sudo, so it has to
be able to open the specified file for output.
The example you found is obviously wrong.
--
lfr
0/0
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