configd.tproj/_confignotify.c

   1 /*
   2  * Copyright (c) 2000-2004, 2006 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 ((store == NULL) || (storePrivate->server == MACH_PORT_NULL)) {
  45                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  46         }
  47
  48         if (_configd_trace) {
  49                 SCTrace(TRUE, _configd_trace,
  50                         CFSTR("%s : %5d : %@\n"),
  51                         internal ? "*notify" : "notify ",
  52                         storePrivate->server,
  53                         key);
  54         }
  55
  56         /*
  57          * 1. Ensure that we hold the lock.
  58          */
  59         sc_status = __SCDynamicStoreLock(store, TRUE);
  60         if (sc_status != kSCStatusOK) {
  61                 return sc_status;
  62         }
  63
  64         /*
  65          * 2. Tickle the value in the dynamic store
  66          */
  67         dict = CFDictionaryGetValue(storeData, key);
  68         if (!dict || !CFDictionaryGetValueIfPresent(dict, kSCDData, (const void **)&value)) {
  69                 /* key doesn't exist (or data never defined) */
  70                 (void)_SCSerialize(kCFBooleanTrue, &value, NULL, NULL);
  71                 newValue = TRUE;
  72         }
  73
  74         /* replace or store initial/temporary existing value */
  75         __SCDynamicStoreSetValue(store, key, value, TRUE);
  76
  77         if (newValue) {
  78                 /* remove the value we just created */
  79                 __SCDynamicStoreRemoveValue(store, key, TRUE);
  80                 CFRelease(value);
  81         }
  82
  83         /*
  84          * 3. Release our lock.
  85          */
  86         __SCDynamicStoreUnlock(store, TRUE);
  87
  88         return sc_status;
  89 }
  90
  91
  92 __private_extern__
  93 kern_return_t
  94 _confignotify(mach_port_t               server,
  95               xmlData_t                 keyRef,         /* raw XML bytes */
  96               mach_msg_type_number_t    keyLen,
  97               int                       *sc_status
  98 )
  99 {
 100         CFStringRef             key             = NULL;         /* key  (un-serialized) */
 101         serverSessionRef        mySession       = getSession(server);
 102
 103         /* un-serialize the key */
 104         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 105                 *sc_status = kSCStatusFailed;
 106                 goto done;
 107         }
 108
 109         if (!isA_CFString(key)) {
 110                 *sc_status = kSCStatusInvalidArgument;
 111                 goto done;
 112         }
 113
 114         if (mySession == NULL) {
 115                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 116                 goto done;
 117         }
 118
 119         *sc_status = __SCDynamicStoreNotifyValue(mySession->store, key, FALSE);
 120
 121     done :
 122
 123         if (key)        CFRelease(key);
 124         return KERN_SUCCESS;
 125 }