configd.tproj/_confignotify.c

   1 /*
   2  * Copyright (c) 2000-2004, 2006, 2008, 2011, 2012, 2015-2017 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         SC_trace("%s : %5d : %@",
  45                  internal ? "*notify" : "notify ",
  46                  storePrivate->server,
  47                  key);
  48
  49         /*
  50          * Tickle the value in the dynamic store
  51          */
  52         dict = CFDictionaryGetValue(storeData, key);
  53         if (!dict || !CFDictionaryGetValueIfPresent(dict, kSCDData, (const void **)&value)) {
  54                 /* key doesn't exist (or data never defined) */
  55                 (void)_SCSerialize(kCFBooleanTrue, &value, NULL, NULL);
  56                 newValue = TRUE;
  57         }
  58
  59         /* replace or store initial/temporary existing value */
  60         __SCDynamicStoreSetValue(store, key, value, TRUE);
  61
  62         if (newValue) {
  63                 /* remove the value we just created */
  64                 __SCDynamicStoreRemoveValue(store, key, TRUE);
  65                 CFRelease(value);
  66         }
  67
  68         if (!internal) {
  69                 /* push changes */
  70                 __SCDynamicStorePush();
  71         }
  72
  73         return sc_status;
  74 }
  75
  76
  77 __private_extern__
  78 kern_return_t
  79 _confignotify(mach_port_t               server,
  80               xmlData_t                 keyRef,         /* raw XML bytes */
  81               mach_msg_type_number_t    keyLen,
  82               int                       *sc_status,
  83               audit_token_t             audit_token)
  84 {
  85         CFStringRef             key             = NULL;         /* key  (un-serialized) */
  86         serverSessionRef        mySession;
  87
  88         /* un-serialize the key */
  89         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
  90                 *sc_status = kSCStatusFailed;
  91                 goto done;
  92         }
  93
  94         if (!isA_CFString(key)) {
  95                 *sc_status = kSCStatusInvalidArgument;
  96                 goto done;
  97         }
  98
  99         mySession = getSession(server);
 100         if (mySession == NULL) {
 101                 mySession = tempSession(server, CFSTR("SCDynamicStoreNotifyValue"), audit_token);
 102                 if (mySession == NULL) {
 103                         /* you must have an open session to play */
 104                         *sc_status = kSCStatusNoStoreSession;
 105                         goto done;
 106                 }
 107         }
 108
 109         if (!hasWriteAccess(mySession, "notify", key)) {
 110                 *sc_status = kSCStatusAccessError;
 111                 goto done;
 112         }
 113
 114         *sc_status = __SCDynamicStoreNotifyValue(mySession->store, key, FALSE);
 115
 116     done :
 117
 118         if (key)        CFRelease(key);
 119         return KERN_SUCCESS;
 120 }