SystemConfiguration.fproj/SCDNotifierGetChanges.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003-2005, 2009-2011, 2016, 2017, 2019 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Modification History
  26  *
  27  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "SCDynamicStoreInternal.h"
  35 #include "config.h"             /* MiG generated file */
  36
  37 CFArrayRef
  38 SCDynamicStoreCopyNotifiedKeys(SCDynamicStoreRef store)
  39 {
  40         SCDynamicStorePrivateRef        storePrivate    = (SCDynamicStorePrivateRef)store;
  41         kern_return_t                   status;
  42         xmlDataOut_t                    xmlDataRef      = NULL; /* serialized data */
  43         mach_msg_type_number_t          xmlDataLen      = 0;
  44         int                             sc_status;
  45         CFArrayRef                      allKeys;
  46
  47         if (store == NULL) {
  48                 /* sorry, you must provide a session */
  49                 _SCErrorSet(kSCStatusNoStoreSession);
  50                 return NULL;
  51         }
  52
  53         if (storePrivate->server == MACH_PORT_NULL) {
  54                 _SCErrorSet(kSCStatusNoStoreServer);
  55                 return NULL;
  56         }
  57
  58     retry :
  59
  60         /* send the key & fetch the associated data from the server */
  61         status = notifychanges(storePrivate->server,
  62                                &xmlDataRef,
  63                                &xmlDataLen,
  64                                (int *)&sc_status);
  65
  66         if (__SCDynamicStoreCheckRetryAndHandleError(store,
  67                                                      status,
  68                                                      &sc_status,
  69                                                      "SCDynamicStoreCopyNotifiedKeys notifychanges()")) {
  70                 goto retry;
  71         }
  72
  73         if (sc_status != kSCStatusOK) {
  74                 if (xmlDataRef != NULL) {
  75                         (void) vm_deallocate(mach_task_self(), (vm_address_t)xmlDataRef, xmlDataLen);
  76                 }
  77                 _SCErrorSet(sc_status);
  78                 return NULL;
  79         }
  80
  81         /* un-serialize the list of keys which have changed */
  82         if (!_SCUnserialize((CFPropertyListRef *)&allKeys, NULL, xmlDataRef, xmlDataLen)) {
  83                 _SCErrorSet(kSCStatusFailed);
  84                 return NULL;
  85         }
  86
  87         return allKeys;
  88 }