configd.tproj/_confignotify.c

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, 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  * May 19, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - initial revision
  29  */
  30
  31 #include "configd.h"
  32 #include "session.h"
  33
  34 __private_extern__
  35 int
  36 __SCDynamicStoreNotifyValue(SCDynamicStoreRef store, CFStringRef key, Boolean internal)
  37 {
  38         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  39         int                             sc_status       = kSCStatusOK;
  40         CFDictionaryRef                 dict;
  41         Boolean                         newValue        = FALSE;
  42         CFDataRef                       value;
  43
  44         if (_configd_verbose) {
  45                 SCLog(TRUE, LOG_DEBUG, CFSTR("__SCDynamicStoreNotifyValue:"));
  46                 SCLog(TRUE, LOG_DEBUG, CFSTR("  key = %@"), key);
  47         }
  48
  49         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
  50                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  51         }
  52
  53         if (_configd_trace) {
  54                 SCTrace(TRUE, _configd_trace,
  55                         CFSTR("%s : %5d : %@\n"),
  56                         internal ? "*notify" : "notify ",
  57                         storePrivate->server,
  58                         key);
  59         }
  60
  61         /*
  62          * 1. Ensure that we hold the lock.
  63          */
  64         sc_status = __SCDynamicStoreLock(store, TRUE);
  65         if (sc_status != kSCStatusOK) {
  66                 return sc_status;
  67         }
  68
  69         /*
  70          * 2. Tickle the value in the dynamic store
  71          */
  72         dict = CFDictionaryGetValue(storeData, key);
  73         if (!dict || !CFDictionaryGetValueIfPresent(dict, kSCDData, (const void **)&value)) {
  74                 /* key doesn't exist (or data never defined) */
  75                 (void)_SCSerialize(kCFBooleanTrue, &value, NULL, NULL);
  76                 newValue = TRUE;
  77         }
  78
  79         /* replace or store initial/temporary existing value */
  80         __SCDynamicStoreSetValue(store, key, value, TRUE);
  81
  82         if (newValue) {
  83                 /* remove the value we just created */
  84                 __SCDynamicStoreRemoveValue(store, key, TRUE);
  85                 CFRelease(value);
  86         }
  87
  88         /*
  89          * 3. Release our lock.
  90          */
  91         __SCDynamicStoreUnlock(store, TRUE);
  92
  93         return sc_status;
  94 }
  95
  96
  97 __private_extern__
  98 kern_return_t
  99 _confignotify(mach_port_t               server,
 100               xmlData_t                 keyRef,         /* raw XML bytes */
 101               mach_msg_type_number_t    keyLen,
 102               int                       *sc_status
 103 )
 104 {
 105         serverSessionRef        mySession = getSession(server);
 106         CFStringRef             key;            /* key  (un-serialized) */
 107
 108         if (_configd_verbose) {
 109                 SCLog(TRUE, LOG_DEBUG, CFSTR("Notify key in configuration database."));
 110                 SCLog(TRUE, LOG_DEBUG, CFSTR("  server = %d"), server);
 111         }
 112
 113         /* un-serialize the key */
 114         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 115                 *sc_status = kSCStatusFailed;
 116                 return KERN_SUCCESS;
 117         }
 118
 119         if (!isA_CFString(key)) {
 120                 *sc_status = kSCStatusInvalidArgument;
 121                 CFRelease(key);
 122                 return KERN_SUCCESS;
 123         }
 124
 125         if (!mySession) {
 126                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 127                 CFRelease(key);
 128                 return KERN_SUCCESS;
 129         }
 130
 131         *sc_status = __SCDynamicStoreNotifyValue(mySession->store, key, FALSE);
 132         CFRelease(key);
 133
 134         return KERN_SUCCESS;
 135 }