On 5/25/2023 10:24 PM, Chris Adams wrote:
Once upon a time, Samuel Sieb <samuel@xxxxxxxx> said:
On 5/25/23 18:18, Bill Cunningham wrote:
How would you access randomization at the system level? No
via srand or rand, but the randomization the system offers through
/dev/random. Would this be a fedora level system call ?
I intend to take a 512 or 1024, for example, size chunk and
fill that with system randomization. Not what you get with srand
and rand I believe they are inferior to system randomization.
Open /dev/random as a binary file and read however many bytes you want.
I assume you know that the amount of data available from there is
limited and if you ask for too much, you might have to wait a while
for it to get generated.
There's also /dev/urandom (which should never "run out" of randomness),
but IIRC they're the basically same now and neither will block (except
possibly during boot).
But if you're writing a program, there's the getrandom() call.
https://man7.org/linux/man-pages/man2/getrandom.2.html
Oh ok I see I was thinking about open() and close() but I am not that
familiar with the system calls.
Thanks much
_______________________________________________
users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
