Ertugrul Söylemez wrote:

>> Actually, the mount(2) manual page confirms the OP's statement: (from
>> mount(2) on a Linux system; other systems may vary)
>>
>> Only the super-user may mount and unmount filesystems.
>
> Pay closer attention. You're confusing the syscall mount(2) with the
> command line utility mount(8).

I'm not. I made a point of clarifying that I was referring to the
system call's manual page. How do you suppose that mount(8)
accomplishes the task of actually mounting a filesystem? It calls
mount(2), which requires euid==0.

> For the syscall, the statement is true, because it can only be used by
> processes with effective user-id 0 (i.e. root), or with proper
> capabilities. This is, what the SetUID bit is good for.

My point exactly, and the answer to the OP's question.

--
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Sylvain Robitaille syl@alcor.concordia.ca

Network and Systems analyst Concordia University
Instructional & Information Technology Montreal, Quebec, Canada
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