LinuxQuestions.org
Support LQ: Use code LQ3 and save $3 on Domain Registration
Go Back   LinuxQuestions.org > Forums > Non-*NIX Forums > Programming
User Name
Password
Programming This forum is for all programming questions.
The question does not have to be directly related to Linux and any language is fair game.

Notices



Reply
 
Search this Thread
Old 12-24-2005, 06:44 PM   #1
zirtik
Member
 
Registered: Jul 2005
Posts: 33

Rep: Reputation: 15
Random number generator inside kernel space


Hello all, I'm trying to implement a kernel module and I need a random number generator. Since this is a kernel module, standard functions like rand() will not work, so anybody knows what I should do in order to obtain random or pseudo random number generators? Thanks in advance
 
Old 12-24-2005, 07:45 PM   #2
paulsm4
Guru
 
Registered: Mar 2004
Distribution: SusE 8.2
Posts: 5,863
Blog Entries: 1

Rep: Reputation: Disabled
Actually, the kernel happens to implement a random number generator, accessible from /dev/random or /dev/urandom, or get_random_bytes().

See "Linux Kernel Development, 2nd Ed", Robert Love, Appendix B for more details.
 
Old 12-26-2005, 05:02 PM   #3
ta0kira
Senior Member
 
Registered: Sep 2004
Distribution: FreeBSD 9.1, Kubuntu 12.10
Posts: 3,078

Rep: Reputation: Disabled
AFAIK, the .ko modules in 2.6 are linked from .o files (unlike 2.4 modules.) To compile those you generally feed off of the kernel makefile, but I'm sure you could find a way to link in standard libs (statically if nothing else.) I agree with paulsm4, though; /dev/urandom is the best way to go for random.
ta0kira
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
does GNU's g77 come with a random number generator? terrence Programming 1 08-30-2005 10:29 PM
Number series generator sniff Programming 8 08-23-2005 04:26 AM
Help: Need random password generator linuxgamer Linux - Software 5 12-02-2003 02:01 PM
I need random number in C ... purpleburple Programming 4 10-28-2002 05:37 AM
Random number generator for linux Steve_Taylor Programming 12 09-30-2001 05:21 PM


All times are GMT -5. The time now is 05:58 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration