configd.tproj/_confignotify.c

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27  * Modification History
  28  *
  29  * May 19, 2001                 Allan Nathanson <ajn@apple.com>
  30  * - initial revision
  31  */
  32
  33 #include "configd.h"
  34 #include "session.h"
  35
  36 __private_extern__
  37 int
  38 __SCDynamicStoreNotifyValue(SCDynamicStoreRef store, CFStringRef key, Boolean internal)
  39 {
  40         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  41         int                             sc_status       = kSCStatusOK;
  42         CFDictionaryRef                 dict;
  43         Boolean                         newValue        = FALSE;
  44         CFDataRef                       value;
  45
  46         if (_configd_verbose) {
  47                 SCLog(TRUE, LOG_DEBUG, CFSTR("__SCDynamicStoreNotifyValue:"));
  48                 SCLog(TRUE, LOG_DEBUG, CFSTR("  key = %@"), key);
  49         }
  50
  51         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
  52                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  53         }
  54
  55         if (_configd_trace) {
  56                 SCTrace(TRUE, _configd_trace,
  57                         CFSTR("%s : %5d : %@\n"),
  58                         internal ? "*notify" : "notify ",
  59                         storePrivate->server,
  60                         key);
  61         }
  62
  63         /*
  64          * 1. Ensure that we hold the lock.
  65          */
  66         sc_status = __SCDynamicStoreLock(store, TRUE);
  67         if (sc_status != kSCStatusOK) {
  68                 return sc_status;
  69         }
  70
  71         /*
  72          * 2. Tickle the value in the dynamic store
  73          */
  74         dict = CFDictionaryGetValue(storeData, key);
  75         if (!dict || !CFDictionaryGetValueIfPresent(dict, kSCDData, (const void **)&value)) {
  76                 /* key doesn't exist (or data never defined) */
  77                 (void)_SCSerialize(kCFBooleanTrue, &value, NULL, NULL);
  78                 newValue = TRUE;
  79         }
  80
  81         /* replace or store initial/temporary existing value */
  82         __SCDynamicStoreSetValue(store, key, value, TRUE);
  83
  84         if (newValue) {
  85                 /* remove the value we just created */
  86                 __SCDynamicStoreRemoveValue(store, key, TRUE);
  87                 CFRelease(value);
  88         }
  89
  90         /*
  91          * 3. Release our lock.
  92          */
  93         __SCDynamicStoreUnlock(store, TRUE);
  94
  95         return sc_status;
  96 }
  97
  98
  99 __private_extern__
 100 kern_return_t
 101 _confignotify(mach_port_t               server,
 102               xmlData_t                 keyRef,         /* raw XML bytes */
 103               mach_msg_type_number_t    keyLen,
 104               int                       *sc_status
 105 )
 106 {
 107         serverSessionRef        mySession = getSession(server);
 108         CFStringRef             key;            /* key  (un-serialized) */
 109
 110         if (_configd_verbose) {
 111                 SCLog(TRUE, LOG_DEBUG, CFSTR("Notify key in configuration database."));
 112                 SCLog(TRUE, LOG_DEBUG, CFSTR("  server = %d"), server);
 113         }
 114
 115         /* un-serialize the key */
 116         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 117                 *sc_status = kSCStatusFailed;
 118                 return KERN_SUCCESS;
 119         }
 120
 121         if (!isA_CFString(key)) {
 122                 *sc_status = kSCStatusInvalidArgument;
 123                 CFRelease(key);
 124                 return KERN_SUCCESS;
 125         }
 126
 127         if (!mySession) {
 128                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 129                 CFRelease(key);
 130                 return KERN_SUCCESS;
 131         }
 132
 133         *sc_status = __SCDynamicStoreNotifyValue(mySession->store, key, FALSE);
 134         CFRelease(key);
 135
 136         return KERN_SUCCESS;
 137 }