SUID permission on Bash script

[Tim Judd]

On 8/28/09, RW <rwmaillists at googlemail.com> wrote:
> On Fri, 28 Aug 2009 11:54:19 +0300
> Giorgos Keramidas <keramida at ceid.upatras.gr> wrote:
>
>> On Fri, 28 Aug 2009 09:24:35 +0100, Jeronimo Calvo
>> <jeronimocalvop at googlemail.com> wrote:
>
>> > As far as i know, using SUID, script must runs with root
>> > permissions... so i shoudnt get "Permission denied", what im doing
>> > wrong??
>>
>> No it must not.  There are security reasons why shell scripts are not
>> setuid-capable.  You can find some of them in the archives of the
>> mailing list, going back at least until 1997.
>
> I'm bit puzzled by this, previous threads have given the impression
> that this is a myth, for example:
>
> http://www.mail-archive.com/freebsd-questions@freebsd.org/msg185134.html
>
> So are scripts actually incapable of running setuid?


Dunno, but this dawns on me..

what defines a script?  I've always defined a script that starts with
a #! shebang.

So the script can be SUID, but the interpreter/shell isn't.  Is that
why it doesn't work?


--Tim