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Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not
From: |
olafBuddenhagen |
Subject: |
Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator |
Date: |
Sat, 27 Jan 2007 15:33:36 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Hi,
On Thu, Jan 25, 2007 at 11:36:01PM +0000, massimo s. wrote:
> I noticed that gconf-schemas was hung (even overnight) until ctrl-c is
> pressed.
[...]
> When using ctrl-c python gives the following traceback, showing the
> instruction where it hangs:
[...]
> File "/usr/lib/python2.4/os.py", line 723, in urandom bytes +=
> read(_urandomfd, n - len(bytes))
> At first I tried showtrans on the /dev/random, /dev/urandom devices
> and I found they were attached to the unofficial translator
> (http://hurd.gnufans.org/bin/view/Hurd/RandomDevice). Resetting
> /dev/random, /dev/urandom by detaching (settrans -fg /dev/urandom) and
> then reattaching the translator fixed the bug. If I release the
> translator the bug comes out again.
Does it also hang if you don't have a translator there at all?
>From the above description, it sounds like this is indeed a bug in the
urandom translator: The read() operation never returns.
There is no simple way to protect against such misbehaviour in a
translator, so I don't think there is anything to fix on the Python
side.
-antrik-
- python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator, massimo s., 2007/01/25
- Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator,
olafBuddenhagen <=
- Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator, massimo s., 2007/01/27
- Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator, Michael Banck, 2007/01/27
- Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator, olafBuddenhagen, 2007/01/28
- Re: python 2.4: os.urandom() hangs if /dev/random, /dev/urandom are not reconnected to a translator, massimo s., 2007/01/28
- Removing translators from nodes, Thomas Schwinge, 2007/01/29
- Re: Removing translators from nodes, Roland McGrath, 2007/01/29