[issue27778] PEP 524: Add os.getrandom()

[Nick Coghlan]

Nick Coghlan added the comment:

Right, the only missing piece now is documentation of the ENOSYS case, which end users may encounter if a Python 3.6 binary that supports os.getrandom() is run against an older kernel.

That's pretty easy to trigger via containers, as getrandom() was added in Linux 3.17 and hasn't generally been backported to LTS distribution kernels.

Debian 8: based on 3.16
Ubuntu 14.04: 3.13 default, 4.4 (from 16.04) available as of 14.04.5
RHEL/CentOS 7: based on 3.10
RHEL/CentOS 6: based on 2.6

So of those potential LTS container hosts, a recent Ubuntu or Fedora container running Python 3.6 will currently get ENOSYS for everything except a fresh Ubuntu 14.04 install that uses the Ubuntu 16.04 kernel.

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<http://bugs.python.org/issue27778>
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