configd.tproj/_confignotify.c

   1 /*
   2  * Copyright (c) 2000-2004, 2006, 2008, 2011, 2012 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  * 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         CFDictionaryRef                 dict;
  39         Boolean                         newValue        = FALSE;
  40         SCDynamicStorePrivateRef        storePrivate    = (SCDynamicStorePrivateRef)store;
  41         int                             sc_status       = kSCStatusOK;
  42         CFDataRef                       value;
  43
  44         if (_configd_trace) {
  45                 SCTrace(TRUE, _configd_trace,
  46                         CFSTR("%s : %5d : %@\n"),
  47                         internal ? "*notify" : "notify ",
  48                         storePrivate->server,
  49                         key);
  50         }
  51
  52         /*
  53          * Tickle the value in the dynamic store
  54          */
  55         dict = CFDictionaryGetValue(storeData, key);
  56         if (!dict || !CFDictionaryGetValueIfPresent(dict, kSCDData, (const void **)&value)) {
  57                 /* key doesn't exist (or data never defined) */
  58                 (void)_SCSerialize(kCFBooleanTrue, &value, NULL, NULL);
  59                 newValue = TRUE;
  60         }
  61
  62         /* replace or store initial/temporary existing value */
  63         __SCDynamicStoreSetValue(store, key, value, TRUE);
  64
  65         if (newValue) {
  66                 /* remove the value we just created */
  67                 __SCDynamicStoreRemoveValue(store, key, TRUE);
  68                 CFRelease(value);
  69         }
  70
  71         if (!internal) {
  72                 /* push changes */
  73                 __SCDynamicStorePush();
  74         }
  75
  76         return sc_status;
  77 }
  78
  79
  80 __private_extern__
  81 kern_return_t
  82 _confignotify(mach_port_t               server,
  83               xmlData_t                 keyRef,         /* raw XML bytes */
  84               mach_msg_type_number_t    keyLen,
  85               int                       *sc_status,
  86               audit_token_t             audit_token)
  87 {
  88         CFStringRef             key             = NULL;         /* key  (un-serialized) */
  89         serverSessionRef        mySession;
  90
  91         /* un-serialize the key */
  92         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
  93                 *sc_status = kSCStatusFailed;
  94                 goto done;
  95         }
  96
  97         if (!isA_CFString(key)) {
  98                 *sc_status = kSCStatusInvalidArgument;
  99                 goto done;
 100         }
 101
 102         mySession = getSession(server);
 103         if (mySession == NULL) {
 104                 mySession = tempSession(server, CFSTR("SCDynamicStoreNotifyValue"), audit_token);
 105                 if (mySession == NULL) {
 106                         /* you must have an open session to play */
 107                         *sc_status = kSCStatusNoStoreSession;
 108                         goto done;
 109                 }
 110         }
 111
 112         if (!hasWriteAccess(mySession, key)) {
 113                 *sc_status = kSCStatusAccessError;
 114                 goto done;
 115         }
 116
 117         *sc_status = __SCDynamicStoreNotifyValue(mySession->store, key, FALSE);
 118
 119     done :
 120
 121         if (key)        CFRelease(key);
 122         return KERN_SUCCESS;
 123 }