configd.tproj/_configremove.c

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27  * Modification History
  28  *
  29  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  30  * - public API conversion
  31  *
  32  * March 24, 2000               Allan Nathanson <ajn@apple.com>
  33  * - initial revision
  34  */
  35
  36 #include "configd.h"
  37 #include "session.h"
  38
  39 __private_extern__
  40 int
  41 __SCDynamicStoreRemoveValue(SCDynamicStoreRef store, CFStringRef key, Boolean internal)
  42 {
  43         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  44         int                             sc_status = kSCStatusOK;
  45         CFDictionaryRef                 dict;
  46         CFMutableDictionaryRef          newDict;
  47         CFStringRef                     sessionKey;
  48
  49         if (_configd_verbose) {
  50                 SCLog(TRUE, LOG_DEBUG, CFSTR("__SCDynamicStoreRemoveValue:"));
  51                 SCLog(TRUE, LOG_DEBUG, CFSTR("  key      = %@"), key);
  52         }
  53
  54         if (!store || (storePrivate->server == MACH_PORT_NULL)) {
  55                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  56         }
  57
  58         if (_configd_trace) {
  59                 SCTrace(TRUE, _configd_trace,
  60                         CFSTR("%s : %5d : %@\n"),
  61                         internal ? "*remove" : "remove ",
  62                         storePrivate->server,
  63                         key);
  64         }
  65
  66         /*
  67          * 1. Ensure that we hold the lock.
  68          */
  69         sc_status = __SCDynamicStoreLock(store, TRUE);
  70         if (sc_status != kSCStatusOK) {
  71                 return sc_status;
  72         }
  73
  74         /*
  75          * 2. Ensure that this key exists.
  76          */
  77         dict = CFDictionaryGetValue(storeData, key);
  78         if ((dict == NULL) || (CFDictionaryContainsKey(dict, kSCDData) == FALSE)) {
  79                 /* key doesn't exist (or data never defined) */
  80                 sc_status = kSCStatusNoKey;
  81                 goto done;
  82         }
  83         newDict = CFDictionaryCreateMutableCopy(NULL, 0, dict);
  84
  85         /*
  86          * 3. Mark this key as "changed". Any "watchers" will be
  87          *    notified as soon as the lock is released.
  88          */
  89         CFSetAddValue(changedKeys, key);
  90
  91         /*
  92          * 4. Add this key to a deferred cleanup list so that, after
  93          *    the change notifications are posted, any associated
  94          *    regex keys can be removed.
  95          */
  96         CFSetAddValue(deferredRemovals, key);
  97
  98         /*
  99          * 5. Check if this is a session key and, if so, add it
 100          *    to the (session) removal list
 101          */
 102         sessionKey = CFDictionaryGetValue(newDict, kSCDSession);
 103         if (sessionKey) {
 104                 CFStringRef     removedKey;
 105
 106                 /* We are no longer a session key! */
 107                 CFDictionaryRemoveValue(newDict, kSCDSession);
 108
 109                 /* add this session key to the (session) removal list */
 110                 removedKey = CFStringCreateWithFormat(NULL, 0, CFSTR("%@:%@"), sessionKey, key);
 111                 CFSetAddValue(removedSessionKeys, removedKey);
 112                 CFRelease(removedKey);
 113         }
 114
 115         /*
 116          * 6. Remove data and update/remove the dictionary store entry.
 117          */
 118         CFDictionaryRemoveValue(newDict, kSCDData);
 119         if (CFDictionaryGetCount(newDict) > 0) {
 120                 /* this key is still being "watched" */
 121                 CFDictionarySetValue(storeData, key, newDict);
 122         } else {
 123                 /* no information left, remove the empty dictionary */
 124                 CFDictionaryRemoveValue(storeData, key);
 125         }
 126         CFRelease(newDict);
 127
 128         /*
 129          * 7. Release our lock.
 130          */
 131     done:
 132         __SCDynamicStoreUnlock(store, TRUE);
 133
 134         return sc_status;
 135 }
 136
 137
 138 __private_extern__
 139 kern_return_t
 140 _configremove(mach_port_t               server,
 141               xmlData_t                 keyRef,         /* raw XML bytes */
 142               mach_msg_type_number_t    keyLen,
 143               int                       *sc_status
 144 )
 145 {
 146         serverSessionRef        mySession = getSession(server);
 147         CFStringRef             key;            /* key  (un-serialized) */
 148
 149         if (_configd_verbose) {
 150                 SCLog(TRUE, LOG_DEBUG, CFSTR("Remove key from configuration database."));
 151                 SCLog(TRUE, LOG_DEBUG, CFSTR("  server = %d"), server);
 152         }
 153
 154         /* un-serialize the key */
 155         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 156                 *sc_status = kSCStatusFailed;
 157                 return KERN_SUCCESS;
 158         }
 159
 160         if (!isA_CFString(key)) {
 161                 *sc_status = kSCStatusInvalidArgument;
 162                 CFRelease(key);
 163                 return KERN_SUCCESS;
 164         }
 165
 166         if (!mySession) {
 167                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 168                 CFRelease(key);
 169                 return KERN_SUCCESS;
 170         }
 171
 172         *sc_status = __SCDynamicStoreRemoveValue(mySession->store, key, FALSE);
 173         CFRelease(key);
 174
 175         return KERN_SUCCESS;
 176 }
 177