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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright (c) 2018, Joyent, Inc.
*/
/*
* getentropy(3C) is an OpenBSD compatible wrapper around getrandom(2).
*/
#include <errno.h>
#include <sys/random.h>
int
getentropy(void *buf, size_t buflen)
{
ssize_t ret;
if (buflen > 256) {
errno = EIO;
return (-1);
}
ret = getrandom(buf, buflen, 0);
if (ret == -1 || ret != buflen) {
if (errno != EFAULT)
errno = EIO;
return (-1);
}
return (0);
}
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