configd.tproj/_notifyremove.c

   1 /*
   2  * Copyright (c) 2000-2004, 2006, 2008, 2010-2012, 2015, 2016 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         SC_trace("%s : %5d : %s : %@",
  73                  internal ? "*watch-" : "watch- ",
  74                  storePrivate->server,
  75                  isRegex  ? "pattern" : "key",
  76                  key);
  77
  78         /*
  79          * remove key from this sessions notifier list after checking that
  80          * it was previously defined.
  81          */
  82         if (isRegex) {
  83                 sc_status = removeKey(storePrivate->patterns, key);
  84                 if (sc_status != kSCStatusOK) {
  85                         goto done;
  86                 }
  87
  88                 /* remove this session as a pattern watcher */
  89                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
  90                 patternRemoveSession(key, sessionNum);
  91                 CFRelease(sessionNum);
  92         } else {
  93                 sc_status = removeKey(storePrivate->keys, key);
  94                 if (sc_status != kSCStatusOK) {
  95                         goto done;
  96                 }
  97
  98                 /*
  99                  * We are watching a specific key. As such, update the
 100                  * store to remove our interest in any changes.
 101                  */
 102                 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
 103                 _removeWatcher(sessionNum, key);
 104                 CFRelease(sessionNum);
 105         }
 106
 107     done :
 108
 109         return sc_status;
 110 }
 111
 112
 113 __private_extern__
 114 kern_return_t
 115 _notifyremove(mach_port_t               server,
 116               xmlData_t                 keyRef,         /* raw XML bytes */
 117               mach_msg_type_number_t    keyLen,
 118               int                       isRegex,
 119               int                       *sc_status
 120 )
 121 {
 122         CFStringRef             key             = NULL;         /* key  (un-serialized) */
 123         serverSessionRef        mySession;
 124
 125         /* un-serialize the key */
 126         if (!_SCUnserializeString(&key, NULL, (void *)keyRef, keyLen)) {
 127                 *sc_status = kSCStatusFailed;
 128                 goto done;
 129         }
 130
 131         if (!isA_CFString(key)) {
 132                 *sc_status = kSCStatusInvalidArgument;
 133                 goto done;
 134         }
 135
 136         mySession = getSession(server);
 137         if (mySession == NULL) {
 138                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 139                 goto done;
 140         }
 141
 142         *sc_status = __SCDynamicStoreRemoveWatchedKey(mySession->store,
 143                                                       key,
 144                                                       isRegex != 0,
 145                                                       FALSE);
 146
 147     done :
 148
 149         if (key)        CFRelease(key);
 150         return KERN_SUCCESS;
 151 }
 152