December 6, 2017

Random in Linux

  • Syscall available since kernel 3.17
  • Only blocks at initialization if insufficient entropy
$ man 2 getrandom
GETRANDOM(2)                                     Linux Programmer's Manual                                    GETRANDOM(2)

NAME
       getrandom - obtain a series of random bytes

SYNOPSIS
       #include <linux/random.h>

       int getrandom(void *buf, size_t buflen, unsigned int flags);
...

Source Linux kernel random.c

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