SystemConfiguration.fproj/SCDNotifierGetChanges.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003-2005, 2009, 2010 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 <mach/mach.h>
  35 #include <mach/mach_error.h>
  36
  37 #include <SystemConfiguration/SystemConfiguration.h>
  38 #include <SystemConfiguration/SCPrivate.h>
  39 #include "SCDynamicStoreInternal.h"
  40 #include "config.h"             /* MiG generated file */
  41
  42 CFArrayRef
  43 SCDynamicStoreCopyNotifiedKeys(SCDynamicStoreRef store)
  44 {
  45         SCDynamicStorePrivateRef        storePrivate    = (SCDynamicStorePrivateRef)store;
  46         kern_return_t                   status;
  47         xmlDataOut_t                    xmlDataRef      = NULL; /* serialized data */
  48         mach_msg_type_number_t          xmlDataLen      = 0;
  49         int                             sc_status;
  50         CFArrayRef                      allKeys;
  51
  52         if (store == NULL) {
  53                 /* sorry, you must provide a session */
  54                 _SCErrorSet(kSCStatusNoStoreSession);
  55                 return NULL;
  56         }
  57
  58         if (storePrivate->server == MACH_PORT_NULL) {
  59                 _SCErrorSet(kSCStatusNoStoreServer);
  60                 return NULL;
  61         }
  62
  63     retry :
  64
  65         /* send the key & fetch the associated data from the server */
  66         status = notifychanges(storePrivate->server,
  67                                &xmlDataRef,
  68                                &xmlDataLen,
  69                                (int *)&sc_status);
  70
  71         if (status != KERN_SUCCESS) {
  72                 if ((status == MACH_SEND_INVALID_DEST) || (status == MIG_SERVER_DIED)) {
  73                         /* the server's gone and our session port's dead, remove the dead name right */
  74                         (void) mach_port_deallocate(mach_task_self(), storePrivate->server);
  75                 } else {
  76                         /* we got an unexpected error, leave the [session] port alone */
  77                         SCLog(TRUE, LOG_ERR, CFSTR("SCDynamicStoreCopyNotifiedKeys notifychanges(): %s"), mach_error_string(status));
  78                 }
  79                 storePrivate->server = MACH_PORT_NULL;
  80                 if ((status == MACH_SEND_INVALID_DEST) || (status == MIG_SERVER_DIED)) {
  81                         if (__SCDynamicStoreReconnect(store)) {
  82                                 goto retry;
  83                         }
  84                 }
  85                 sc_status = status;
  86         }
  87
  88         if (sc_status != kSCStatusOK) {
  89                 if (xmlDataRef != NULL) {
  90                         (void) vm_deallocate(mach_task_self(), (vm_address_t)xmlDataRef, xmlDataLen);
  91                 }
  92                 _SCErrorSet(sc_status);
  93                 return NULL;
  94         }
  95
  96         /* un-serialize the list of keys which have changed */
  97         if (!_SCUnserialize((CFPropertyListRef *)&allKeys, NULL, xmlDataRef, xmlDataLen)) {
  98                 _SCErrorSet(kSCStatusFailed);
  99                 return NULL;
 100         }
 101
 102         return allKeys;
 103 }