/*
* Copyright (c) 2013 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <strings.h>
#include <Availability.h>
#include "gethostuuid_private.h"
extern int __gethostuuid(uuid_t, const struct timespec *);
static volatile int (*_gethostuuid_callback)(uuid_t) = (void *)0;
int
gethostuuid(uuid_t uuid, const struct timespec *timeout)
{
int result;
result = __gethostuuid(uuid, timeout);
if ((result == -1) && (errno == EPERM)) {
if (_gethostuuid_callback) {
result = _gethostuuid_callback(uuid);
} else {
/* no fallback, return -1/EPERM */
memset(uuid, 0x00, sizeof(*uuid));
}
}
return result;
}
/* SPI to call gethostuuid syscall directly, without fallback, need an entitlement */
int
_getprivatesystemidentifier(uuid_t uuid, const struct timespec *timeout)
{
return __gethostuuid(uuid, timeout);
}
int
_register_gethostuuid_callback(int (*new_callback)(uuid_t))
{
if (__sync_bool_compare_and_swap((void **)&_gethostuuid_callback, (void *)0, (void *)new_callback)) {
return 0;
} else {
return EINVAL;
}
}