[shittyadmin]

Yup, if you want to see the state of the art in this, here it is from libsodium:

https://github.com/jedisct1/libsodium/blob/master/src/libsod...

They sum it up in their docs like this:

- On Windows systems, the RtlGenRandom() function is used

- On OpenBSD and Bitrig, the arc4random() function is used

- On recent Linux kernels, the getrandom system call is used

- On other Unices, the /dev/urandom device is used

[loeg]

It seems they use getrandom() on FreeBSD too:

    # if defined(__FreeBSD_version) && __FreeBSD_version >= 1200000
    #  include <sys/random.h>
    #  define HAVE_LINUX_COMPATIBLE_GETRANDOM