libc-bottom-half/sources/getentropy.c


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#include <errno.h>
#include <unistd.h>
#include <wasi/api.h>

int __getentropy(void *buffer, size_t len) {
    if (len > 256) {
        errno = EIO;
        return -1;
    }

    int r = __wasi_random_get(buffer, len);

    if (r != 0) {
        errno = r;
        return -1;
    }

    return 0;
}
weak_alias(__getentropy, getentropy);