SystemConfiguration.fproj/SCDNotifierGetChanges.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <mach/mach.h>
  24 #include <mach/mach_error.h>
  25
  26 #include <SystemConfiguration/SCD.h>
  27 #include "config.h"             /* MiG generated file */
  28 #include "SCDPrivate.h"
  29
  30
  31 static CFComparisonResult
  32 sort_keys(const void *p1, const void *p2, void *context) {
  33         CFStringRef key1 = (CFStringRef)p1;
  34         CFStringRef key2 = (CFStringRef)p2;
  35         return CFStringCompare(key1, key2, 0);
  36 }
  37
  38
  39 SCDStatus
  40 SCDNotifierGetChanges(SCDSessionRef session, CFArrayRef *notifierKeys)
  41 {
  42         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)session;
  43         kern_return_t           status;
  44         CFDataRef               xmlData;        /* data (XML serialized) */
  45         xmlDataOut_t            xmlDataRef;     /* serialized data */
  46         int                     xmlDataLen;
  47         SCDStatus               scd_status;
  48         CFArrayRef              allKeys;
  49         CFStringRef             xmlError;
  50         CFIndex                 keyCnt;
  51         CFMutableArrayRef       sortedKeys;
  52
  53         SCDLog(LOG_DEBUG, CFSTR("SCDNotifierGetChanges:"));
  54
  55         if ((session == NULL) || (sessionPrivate->server == MACH_PORT_NULL)) {
  56                 return SCD_NOSESSION;
  57         }
  58
  59         /* send the key & fetch the associated data from the server */
  60         status = notifychanges(sessionPrivate->server,
  61                                &xmlDataRef,
  62                                &xmlDataLen,
  63                                (int *)&scd_status);
  64
  65         if (status != KERN_SUCCESS) {
  66                 if (status != MACH_SEND_INVALID_DEST)
  67                         SCDLog(LOG_DEBUG, CFSTR("notifychanges(): %s"), mach_error_string(status));
  68                 (void) mach_port_destroy(mach_task_self(), sessionPrivate->server);
  69                 sessionPrivate->server = MACH_PORT_NULL;
  70                 return SCD_NOSERVER;
  71         }
  72
  73         if (scd_status != SCD_OK) {
  74                 status = vm_deallocate(mach_task_self(), (vm_address_t)xmlDataRef, xmlDataLen);
  75                 if (status != KERN_SUCCESS) {
  76                         SCDLog(LOG_DEBUG, CFSTR("vm_deallocate(): %s"), mach_error_string(status));
  77                         /* non-fatal???, proceed */
  78                 }
  79                 *notifierKeys = NULL;
  80                 return scd_status;
  81         }
  82
  83         /* un-serialize the list of keys which have changed */
  84         xmlData = CFDataCreate(NULL, xmlDataRef, xmlDataLen);
  85         status = vm_deallocate(mach_task_self(), (vm_address_t)xmlDataRef, xmlDataLen);
  86         if (status != KERN_SUCCESS) {
  87                 SCDLog(LOG_DEBUG, CFSTR("vm_deallocate(): %s"), mach_error_string(status));
  88                 /* non-fatal???, proceed */
  89         }
  90         allKeys = CFPropertyListCreateFromXMLData(NULL,
  91                                                   xmlData,
  92                                                   kCFPropertyListImmutable,
  93                                                   &xmlError);
  94         CFRelease(xmlData);
  95         if (xmlError) {
  96                 SCDLog(LOG_DEBUG, CFSTR("CFPropertyListCreateFromXMLData() list: %s"), xmlError);
  97                 return SCD_FAILED;
  98         }
  99
 100         keyCnt = CFArrayGetCount(allKeys);
 101         sortedKeys = CFArrayCreateMutableCopy(NULL, keyCnt, allKeys);
 102         CFRelease(allKeys);
 103         CFArraySortValues(sortedKeys,
 104                           CFRangeMake(0, keyCnt),
 105                           sort_keys,
 106                           NULL);
 107
 108         *notifierKeys = sortedKeys;
 109         return scd_status;
 110 }