I have a question about hard drives in Linux

I see the following partition for guest level accounts on a machine.

Quote:

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t% ls -al /dev/mirror/gm0s2f
crw-r----- 1 root operator 0, 94 Nov 20 05:41 /dev/mirror/gm0s2f

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I know it's possible for a guest user to read and write stuff to the hard drive from their account. How is this possible when the partition only has the read bit set for operator group?

Quote:

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Originally Posted by Overworked_PhD

I see the following partition for guest level accounts on a machine.



I know it's possible for a guest user to read and write stuff to the hard drive from their account. How is this possible when the partition only has the read bit set for operator group?

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The permissions on the device node have nothing to do with it. The device was mounted by a user (root) who had privileges to do so, end of story.

The thing that actually needs the read and write permissions is the filesystem driver, which is in the kernel. So it has these permissions.