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Non pseudo devices being world writeable and world readable

 
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Janice Bradford
Occasional Contributor

‎03-31-2006 01:48 AM

‎03-31-2006 01:48 AM

Non pseudo devices being world writeable and world readable

Hi....
Can anyone point to documentation or tell me if the non-console pseudo terminal device "permissions" HAVE to be set to be world readable and/or writable? I cannot find any documentation on this. Thanks in advance.

JB
Sr. Unix Admin
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Patrice Le Guyader
Respected Contributor

‎03-31-2006 07:05 AM

‎03-31-2006 07:05 AM

Re: Non pseudo devices being world writeable and world readable

Demat Janice,

It seems to be normal, I've looked on a new server and they are owned by root root and with rights to 0666.

hope this helps
Kenavo
pat
Good judgement comes with experience. Unfortunately, the experience usually comes from bad judgement.
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Bill Hassell
Honored Contributor

‎03-31-2006 07:25 AM

‎03-31-2006 07:25 AM

Solution

Re: Non pseudo devices being world writeable and world readable

Unused pty's are set to 666 since any incoming user needs access. Once a daemon (like telnetd or sshd) is attached to a pty, the permissions are usually changed. World readable and writable for an unused pty is fine as it points to nothing so sending or reading data to these device files does nothing. Once the device file is in use, it is protected.


Bill Hassell, sysadmin
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Janice Bradford
Occasional Contributor

‎03-31-2006 08:20 AM

‎03-31-2006 08:20 AM

Re: Non pseudo devices being world writeable and world readable

Thank you for the responses and confirmation.
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