Hi, On 26/05/2021 10:31, Sergiy Kibrik wrote:
Hi Julien,From the man: VERSIONS getrandom() was introduced in version 3.17 of the Linux kernel. Support was added to glibc in version 2.25. If I am not mistaken glibc 2.25 was released in 2017. Also, the call was only introduced in FreeBSD 12. So I think we want to check if getrandom() can be used. We may also want to consider to fallback to read /dev/urandom if the call return ENOSYS.You mean its availability should be checked both at build and runtime?
Correct. You can have a libc suporting getrandom() but a kernel that doesn't provide the syscall.
Cheers, -- Julien Grall
