configd.tproj/_configremove.c

   1 /*
   2  * Copyright (c) 2000-2004, 2006, 2008 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  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "configd.h"
  35 #include "session.h"
  36
  37 __private_extern__
  38 int
  39 __SCDynamicStoreRemoveValue(SCDynamicStoreRef store, CFStringRef key, Boolean internal)
  40 {
  41         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  42         int                             sc_status = kSCStatusOK;
  43         CFDictionaryRef                 dict;
  44         CFMutableDictionaryRef          newDict;
  45         CFStringRef                     sessionKey;
  46
  47         if ((store == NULL) || (storePrivate->server == MACH_PORT_NULL)) {
  48                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  49         }
  50
  51         if (_configd_trace) {
  52                 SCTrace(TRUE, _configd_trace,
  53                         CFSTR("%s : %5d : %@\n"),
  54                         internal ? "*remove" : "remove ",
  55                         storePrivate->server,
  56                         key);
  57         }
  58
  59         /*
  60          * 1. Ensure that we hold the lock.
  61          */
  62         sc_status = __SCDynamicStoreLock(store, TRUE);
  63         if (sc_status != kSCStatusOK) {
  64                 return sc_status;
  65         }
  66
  67         /*
  68          * 2. Ensure that this key exists.
  69          */
  70         dict = CFDictionaryGetValue(storeData, key);
  71         if ((dict == NULL) || (CFDictionaryContainsKey(dict, kSCDData) == FALSE)) {
  72                 /* key doesn't exist (or data never defined) */
  73                 sc_status = kSCStatusNoKey;
  74                 goto done;
  75         }
  76         newDict = CFDictionaryCreateMutableCopy(NULL, 0, dict);
  77
  78         /*
  79          * 3. Mark this key as "changed". Any "watchers" will be
  80          *    notified as soon as the lock is released.
  81          */
  82         CFSetAddValue(changedKeys, key);
  83
  84         /*
  85          * 4. Add this key to a deferred cleanup list so that, after
  86          *    the change notifications are posted, any associated
  87          *    regex keys can be removed.
  88          */
  89         CFSetAddValue(deferredRemovals, key);
  90
  91         /*
  92          * 5. Check if this is a session key and, if so, add it
  93          *    to the (session) removal list
  94          */
  95         sessionKey = CFDictionaryGetValue(newDict, kSCDSession);
  96         if (sessionKey) {
  97                 CFStringRef     removedKey;
  98
  99                 /* We are no longer a session key! */
 100                 CFDictionaryRemoveValue(newDict, kSCDSession);
 101
 102                 /* add this session key to the (session) removal list */
 103                 removedKey = CFStringCreateWithFormat(NULL, 0, CFSTR("%@:%@"), sessionKey, key);
 104                 CFSetAddValue(removedSessionKeys, removedKey);
 105                 CFRelease(removedKey);
 106         }
 107
 108         /*
 109          * 6. Remove data and update/remove the dictionary store entry.
 110          */
 111         CFDictionaryRemoveValue(newDict, kSCDData);
 112         if (CFDictionaryGetCount(newDict) > 0) {
 113                 /* this key is still being "watched" */
 114                 CFDictionarySetValue(storeData, key, newDict);
 115         } else {
 116                 /* no information left, remove the empty dictionary */
 117                 CFDictionaryRemoveValue(storeData, key);
 118         }
 119         CFRelease(newDict);
 120
 121         /*
 122          * 7. Release our lock.
 123          */
 124     done:
 125         __SCDynamicStoreUnlock(store, TRUE);
 126
 127         return sc_status;
 128 }
 129
 130
 131 __private_extern__
 132 kern_return_t
 133 _configremove(mach_port_t               server,
 134               xmlData_t                 keyRef,         /* raw XML bytes */
 135               mach_msg_type_number_t    keyLen,
 136               int                       *sc_status
 137 )
 138 {
 139         CFStringRef             key             = NULL;         /* key  (un-serialized) */
 140         serverSessionRef        mySession;
 141
 142         /* un-serialize the key */
 143         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 144                 *sc_status = kSCStatusFailed;
 145                 goto done;
 146         }
 147
 148         if (!isA_CFString(key)) {
 149                 *sc_status = kSCStatusInvalidArgument;
 150                 goto done;
 151         }
 152
 153         mySession = getSession(server);
 154         if (mySession == NULL) {
 155                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 156                 goto done;
 157         }
 158
 159         *sc_status = __SCDynamicStoreRemoveValue(mySession->store, key, FALSE);
 160
 161     done :
 162
 163         if (key)        CFRelease(key);
 164
 165         return KERN_SUCCESS;
 166 }
 167