Re: capable()-function
Chris Wright (chris@wirex.com)
Wed, 9 Oct 2002 12:08:19 -0700
* Tony Glader (Tony.Glader@blueberrysolutions.com) wrote:
> On Wed, 9 Oct 2002, Chris Wright wrote:
>
> > > I was investigating problems with PCMCIA and found that
> > > capable(CAP_SYS_ADMIN) returns always false in my case. If I'm calling
> > Typically root has all effective capabilities (except CAP_SETPCAP).
> > You can check your effective capabilities in /proc/[pid]/status.
>
> In this case capable() call has been made from a kernel module. I think a
> module doesn't have a PID? Should I check capabilites of program that does
> a ioctl() call that will cause module to do capable() checking?
The userspace task that called the ioctl() is the one to look at.
> Process that does ioctl() call is owned by root and has following
> capabilities:
>
> CapInh: 0000000000000000
> CapPrm: 00000000fffffeff
> CapEff: 00000000fffffeff
Ok, I don't think the capable() check is failing.
-chris
--
Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net
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