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401012952d
Some systems, such as Darwin, only declare getentropy in <sys/random.h>, so declare it there on WASI too for compatibility. Also, give getentropy the underscore-prefix/weak-symbol treatment, as it's not a standard-reserved identifier.
25 lines
497 B
C
25 lines
497 B
C
#include <wasi/core.h>
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#include <errno.h>
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#include <unistd.h>
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#ifdef _REENTRANT
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#error With threads support, getentropy is not intended to be a cancellation point.
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#endif
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int __getentropy(void *buffer, size_t len) {
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if (len > 256) {
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errno = EIO;
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return -1;
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}
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int r = __wasi_random_get(buffer, len);
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if (r != 0) {
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errno = r;
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return -1;
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}
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return 0;
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}
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extern __typeof(__getentropy) getentropy __attribute__((weak, alias("__getentropy")));
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