bluelib/core/sys/linux/random.c

#include <fcntl.h>
#include <stdint.h>
#include <unistd.h>

uint64_t z__b_platform_random_seed()
{
	int fd = open("/dev/urandom", O_RDONLY);
	if (fd == -1) {
		return (uint64_t)-1;
	}

	uint64_t v = 0;
	if (read(fd, &v, sizeof v) != sizeof v) {
		close(fd);
		return (uint64_t)-1;
	}

	return v;
}

uint64_t z__b_platform_random_seed_secure()
{
	int fd = open("/dev/random", O_RDONLY);
	if (fd == -1) {
		return (uint64_t)-1;
	}

	uint64_t v = 0;
	if (read(fd, &v, sizeof v) != sizeof v) {
		close(fd);
		return (uint64_t)-1;
	}

	return v;
}