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Is it possible to enable ACLs for files under /dev/pts?

OS is Gentoo Linux, and the kernel is 3.2.13 with grsec.

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I wonder who was so kind to downvote without commenting – miniBill Jun 26 '12 at 7:27

Do you mean ACLs as in the things you set with setfacl? No, the 'files' under /dev/pts are character devices.

setfacl only works for files and directories.

setfacl -m u:test1:r /dev/pts/2
setfacl: /dev/pts/2: Operation not supported
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Isn't there a way to use ACLs on character devices? – miniBill Jun 14 '12 at 15:02
What are you trying to do? – Sirch Jun 14 '12 at 15:10
Allow users to restrict who can write them – miniBill Jun 17 '12 at 18:47
Well I dunno if there is anything since no xattr support on devpts. – Andrew Smith Jun 20 '12 at 12:31
ls -lZ /dev/pts crw--w----. root tty unconfined_u:object_r:user_devpts_t:s0 0 crw--w----. root tty unconfined_u:object_r:user_devpts_t:s0 1 c---------. root root system_u:object_r:ptmx_t:s0 ptmx – Andrew Smith Jun 20 '12 at 12:56
up vote 0 down vote accepted

Apparently there is an [old] patch for what I want to do here, but it was rejected because of lack of use cases.

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