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//Program ".c"
#include <sys/random.h>
#include <stdio.h>
int main() //non documented
{
char a[10];
int r = getrandom(&a, 10, GRND_NONBLOCK);
if(r == -1) return r;
FILE *f = fopen("rnd", "w");
if(f == NULL) return -1;
r = fputs(a, f);
if(r == EOF) return r;
r = fclose(f);
if(r == -1) return r;
return 0;
}
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