Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

ulong
truerand(void)
{
        ulong x;
        static int randfd = -1;

        if(randfd < 0)
                randfd = open("/dev/random", OREAD|OCEXEC);
        if(randfd < 0)
                sysfatal("can't open /dev/random");
        if(read(randfd, &x, sizeof(x)) != sizeof(x))
                sysfatal("can't read /dev/random");
        return x;
}