topic Re: /dev/urandom in Operating System - Tru64 Unix

/dev/urandom

Douglas R. Taylor — Wed, 22 Feb 2006 08:29:05 GMT

What permissions are required by the /dev/urandom device?

Re: /dev/urandom

Michael Schulte zur Sur — Wed, 22 Feb 2006 08:50:50 GMT

Hi,

ours has 666

greetings,

Michael

Re: /dev/urandom

Steven Schweda — Wed, 22 Feb 2006 09:22:31 GMT

I don't know about "required", but 666 seems
to be popular.

Re: /dev/urandom

Michael Schulte zur Sur — Wed, 22 Feb 2006 09:49:23 GMT

I wonder if writing to it makes sense
so 444 should be ok too?

Michael

Re: /dev/urandom

Steven Schweda — Wed, 22 Feb 2006 09:51:40 GMT

> I wonder if writing to it makes sense

urtx# man urandom
[...]

Writing data to the /dev/random or /dev/urandom device will mix the new
data into the entrophy pool to make the random data better, but it will not
increase the entrophy estimate. This prevents a user from writing lots of
low-entrophy data to the pool and having the /dev/random device generate
poor random data.

Re: /dev/urandom

Douglas R. Taylor — Wed, 22 Feb 2006 10:11:46 GMT

Thanks to all that replied. 666 seems to be the default.

Re: /dev/urandom

Douglas R. Taylor — Wed, 22 Feb 2006 10:12:46 GMT

Permissions 666 seems to be the default answer for this file.