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Failed To Open Dev Urandom

msg170004 - (view) Author: The Written Word ([email protected]) Date: 2012-09-07 19:04 We're running Tru64 UNIX 5.1A, not 5.1B which definitely doesn't have /dev/urandom. How can I slow down rsync? IIUC, it fails on systems without urandom, such as Tru64 and HPUX. Since there's a workaround, I don't think fixing systems with non-functional /dev/urandom is a good enough reason to backport the change. have a peek here

Administration User List Committer List Help Tracker Documentation Tracker Development Report Tracker Problem Issue15340 classification Title: OSError with "import random" when /dev/urandom doesn't exist (regression from 2.6) Type: Stage: resolved Components: Share this:RedditLike this:Like Loading... But modern linux system is not so. With grateful acknowledgement to all contributors.

Mounting SquashFS image... Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. If you are unable to reopen this bug, please file a new report against the current release.

  1. Now theoretically, one can make the arc4random_buf() function a wrapper around /dev/urandom, and be done with it.
  2. Launchpad Janitor (janitor) said on 2015-05-07: #3 This question was expired because it remained in the 'Open' state without activity for the last 15 days.
  3. If you experience problems, please add a comment to this bug.

They have been ignored, or old ones used instead. Creating DBUS uuid... For backwards compatibility (previous releases all raised and caught NotImplementedError), here is a patch that stops Python bailing out with "OSError: No such file or directory /dev/urandom" for me. First, it's possible the open was interrupted, as may happen on some implementations.

Since the latter is a CSPRNG, it can keep outputting data indefinitely, without any significant waiting periods. Run: dnf update 3. This makes the /dev not cluttered too much with mostly unused nodes. How do I prevent flight in a cyberpunk future?

I've attached a revised patch that doesn't misuse PyErr_SetFromErrnoWithFilename. Therefore, the operating system is able to collect variables from all the various hardware involved, their current operating conditions, how they handle certain tasks, how long they take, how much electricity So anyway - this has got to count as the most bizarrely mis-reported error in my most recent years. "/dev/urandom" was working fine. This may sound like a strange question, but it isn't.

They have been ignored, or old ones used instead. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. To upgrade package use the Internet or install it using rpm command: # yum update mkinitrd Finally, build the image: # mkinitrd -v -f /boot/initrd-2.6.18-194.el5.img 2.6.18-194.el5 Reboot the server: # reboot Creating user directory...

Since the former is only entropy, it is limited as to how much it can output, and one needing a lot of random data can be stuck waiting a while for navigate here Fatal Python error: Failed to open /dev/urandom Fatal Python error: Failed to open /dev/urandom >> Customizing: , 3.16.0-30-generic x86_64 Ign http://security.ubuntu.com trusty-security InRelease Ign http://archive.ubuntu.com trusty InRelease Ign http://security.ubuntu.com trusty-security Release.gpg It isn't. So without further ado: Poorly seeding a cryptographically secure pseudorandom number generator (CSPRNG) In order for many forms of cryptography to work properly, they depend on secrecy, unpredictability, and uniqueness.

This result is what we call entropy. In any case, /dev/random is the correct one; /dev/urandom doesn't have a kernel interface for adding entropy, which is why the open fails (not even root can force the kernel to In the second article, I called attention to poor arc4random_buf() implementations being created, specifically saying: "Using poor sources of entropy like /dev/urandom on Linux, or worse, gettimeofday(), and using them to http://chatflow.net/failed-to/failed-to-open-config-lua.html Comment 2 Praveen Kumar 2016-09-16 06:10:21 EDT Steps to Reproduce 1. # supermin -v --prepare dnf bash -o /tmp/supermin.d 2. # sudo supermin --build --format chroot -o /tmp/appliance.d /tmp/supermin.d 3. #

Removing win32 files... Posted by Dominic Cronin at Jan 22, 2014 01:12 AM | Permalink Filed under: emerge, Free Software, Gentoo, note to Self So there I was - just for fun building my The kernel will feed /dev/urandom from /dev/random automatically.

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msg169798 - (view) Author: Antoine Pitrou (pitrou) * Date: 2012-09-03 19:46 As for the patch: looks good on the principle. Thank you for reporting this bug and we are sorry it could not be fixed. Maybe your installation doesn't have KRNG11i in /etc/loadmods? One value is never seen outside the pseudo-random number generator, and is used as part of the calculations for the next time a random value is requested, and the other value

So far so good, right? So the open() call should probably be wrapped like read() is. But if you managed to open and read all the data needed, everything is great, right? this contact form So I installed rng-tools and tried following these instructions: http://serverfault.com/questions/214605/gpg-not-enough-entropy When I am logged in as root, and try to run rngd -r /dev/urandom I get the following error: can't open

To do this, set the environment variable PYTHONHASHSEED=0 . $ sudo mv /dev/urandom /dev/urandom~ $ python3 Fatal Python error: Failed to open /dev/urandom Segmentation fault (core dumped) $ PYTHONHASHSEED=0 python3 Python How do you even know if /dev/(u)random is random in the first place? mount: warning: /home/frank/tmp/remaster-root-mount seems to be mounted read-only. Here's a copy of my build log: Build (/usr/bin/uck-gui --wait-before-exit) started at 2015-04-20 08:59:09 no talloc stackframe at ../source3/param/loadparm.c:4864, leaking memory >> Ubuntu Customization Kit 2.4.7 on Ubuntu 14.04, 3.13.0-49-generic x86_64

History Link existing bug Link to a FAQ Create a new FAQ To post a message you must log in. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Bug1293703 - python requires /dev/urandom making it harder to rescue broken systems Summary: python requires /dev/urandom making it harder to rescue broken systems Status: CLOSED EOL Aliases: None Product: Fedora Classification: