configd.tproj/_notifyremove.c

   1 /*
   2  * Copyright (c) 2000-2004, 2006, 2008, 2010 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
  35 #include "configd.h"
  36 #include "session.h"
  37 #include "pattern.h"
  38
  39
  40 static int
  41 removeKey(CFMutableArrayRef keys, CFStringRef key)
  42 {
  43         CFIndex i;
  44         CFIndex n;
  45
  46         if (keys == NULL) {
  47                 /* sorry, empty notifier list */
  48                 return kSCStatusNoKey;
  49         }
  50
  51         n = CFArrayGetCount(keys);
  52         i = CFArrayGetFirstIndexOfValue(keys, CFRangeMake(0, n), key);
  53         if (i == kCFNotFound) {
  54                 /* sorry, key does not exist in notifier list */
  55                 return kSCStatusNoKey;
  56         }
  57
  58         /* remove key from this sessions notifier list */
  59         CFArrayRemoveValueAtIndex(keys, i);
  60         return kSCStatusOK;
  61 }
  62
  63
  64 __private_extern__
  65 int
  66 __SCDynamicStoreRemoveWatchedKey(SCDynamicStoreRef store, CFStringRef key, Boolean isRegex, Boolean internal)
  67 {
  68         int                             sc_status       = kSCStatusOK;
  69         CFNumberRef                     sessionNum;
  70         SCDynamicStorePrivateRef        storePrivate    = (SCDynamicStorePrivateRef)store;
  71
  72         if ((store == NULL) || (storePrivate->server == MACH_PORT_NULL)) {
  73                 return kSCStatusNoStoreSession; /* you must have an open session to play */
  74         }
  75
  76         if (_configd_trace) {
  77                 SCTrace(TRUE, _configd_trace,
  78                         CFSTR("%s : %5d : %s : %@\n"),
  79                         internal ? "*watch-" : "watch- ",
  80                         storePrivate->server,
  81                         isRegex  ? "pattern" : "key",
  82                         key);
  83         }
  84
  85         /*
  86          * remove key from this sessions notifier list after checking that
  87          * it was previously defined.
  88          */
  89         if (isRegex) {
  90                 sc_status = removeKey(storePrivate->patterns, key);
  91                 if (sc_status != kSCStatusOK) {
  92                         goto done;
  93                 }
  94
  95                 /* remove this session as a pattern watcher */
  96                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
  97                 patternRemoveSession(key, sessionNum);
  98                 CFRelease(sessionNum);
  99         } else {
 100                 sc_status = removeKey(storePrivate->keys, key);
 101                 if (sc_status != kSCStatusOK) {
 102                         goto done;
 103                 }
 104
 105                 /*
 106                  * We are watching a specific key. As such, update the
 107                  * store to mark our interest in any changes.
 108                  */
 109                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
 110                 _removeWatcher(sessionNum, key);
 111                 CFRelease(sessionNum);
 112         }
 113
 114     done :
 115
 116         return sc_status;
 117 }
 118
 119
 120 __private_extern__
 121 kern_return_t
 122 _notifyremove(mach_port_t               server,
 123               xmlData_t                 keyRef,         /* raw XML bytes */
 124               mach_msg_type_number_t    keyLen,
 125               int                       isRegex,
 126               int                       *sc_status
 127 )
 128 {
 129         CFStringRef             key             = NULL;         /* key  (un-serialized) */
 130         serverSessionRef        mySession;
 131
 132         /* un-serialize the key */
 133         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 134                 *sc_status = kSCStatusFailed;
 135                 goto done;
 136         }
 137
 138         if (!isA_CFString(key)) {
 139                 *sc_status = kSCStatusInvalidArgument;
 140                 goto done;
 141         }
 142
 143         mySession = getSession(server);
 144         if (mySession == NULL) {
 145                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 146                 goto done;
 147         }
 148
 149         *sc_status = __SCDynamicStoreRemoveWatchedKey(mySession->store,
 150                                                       key,
 151                                                       isRegex != 0,
 152                                                       FALSE);
 153
 154     done :
 155
 156         if (key)        CFRelease(key);
 157         return KERN_SUCCESS;
 158 }
 159