chown()
{
register *ip;
if (!suser() || (ip = owner()) == NULL)
return;
ip->i_uid = u.u_arg[1].lobyte;
ip->i_gid = u.u_arg[1].hibyte;
ip->i_flag =| IUPD;
iput(ip);
}chown()
{
register *ip;
if ((ip = owner()) == NULL)
return;
ip->i_uid = u.u_arg[1].lobyte;
ip->i_gid = u.u_arg[1].hibyte;
if(u.u_uid != 0)
ip->i_mode =& ~(ISUID|ISGID);
ip->i_flag =| IUPD;
iput(ip);
}
There's no real point in restricting the chown program if the system call
remains executable by non-root.
-----Original Message-----
From: tuhs-bounces@minnie.tuhs.org [mailto:tuhs-bounces@minnie.tuhs.org] On
Behalf Of Dario Niedermann
Sent: Thursday, January 9, 2014 1:18 PM
To: tuhs@minnie.tuhs.org
Subject: Re: [TUHS] History of chown semantics
Il 09/01/2014 alle 15:56, Clem Cole ha scritto:
> I agree with you, I always thought it was crazy [...]
Maybe I'm missing something, but it seems easy enough to make the `chown'
program only executable by root.
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