SystemConfiguration.fproj/SCPApply.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2004-2006, 2010, 2015 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  * November 9, 2000             Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include <SystemConfiguration/SystemConfiguration.h>
  35 #include <SystemConfiguration/SCPrivate.h>
  36 #include "SCPreferencesInternal.h"
  37 #include "SCHelper_client.h"
  38
  39
  40 static Boolean
  41 __SCPreferencesApplyChanges_helper(SCPreferencesRef prefs)
  42 {
  43         Boolean                 ok;
  44         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  45         uint32_t                status          = kSCStatusOK;
  46
  47         if (prefsPrivate->helper_port == MACH_PORT_NULL) {
  48                 // if no helper
  49                 goto fail;
  50         }
  51
  52         // have the helper "apply" the prefs
  53 //      status = kSCStatusOK;
  54         ok = _SCHelperExec(prefsPrivate->helper_port,
  55                            SCHELPER_MSG_PREFS_APPLY,
  56                            NULL,
  57                            &status,
  58                            NULL);
  59         if (!ok) {
  60                 goto fail;
  61         }
  62
  63         if (status != kSCStatusOK) {
  64                 goto error;
  65         }
  66
  67         return TRUE;
  68
  69     fail :
  70
  71         // close helper
  72         if (prefsPrivate->helper_port != MACH_PORT_NULL) {
  73                 _SCHelperClose(&prefsPrivate->helper_port);
  74         }
  75
  76         status = kSCStatusAccessError;
  77
  78     error :
  79
  80         // return error
  81         _SCErrorSet(status);
  82         return FALSE;
  83 }
  84
  85
  86 Boolean
  87 SCPreferencesApplyChanges(SCPreferencesRef prefs)
  88 {
  89         Boolean                 ok              = FALSE;
  90         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  91         Boolean                 wasLocked;
  92
  93         if (prefs == NULL) {
  94                 /* sorry, you must provide a session */
  95                 _SCErrorSet(kSCStatusNoPrefsSession);
  96                 return FALSE;
  97         }
  98
  99         /*
 100          * Determine if the we have exclusive access to the preferences
 101          * and acquire the lock if necessary.
 102          */
 103         wasLocked = prefsPrivate->locked;
 104         if (!wasLocked) {
 105                 if (!SCPreferencesLock(prefs, TRUE)) {
 106                         SC_log(LOG_INFO, "SCPreferencesLock() failed");
 107                         return FALSE;
 108                 }
 109         }
 110
 111         if (prefsPrivate->authorizationData != NULL) {
 112                 ok = __SCPreferencesApplyChanges_helper(prefs);
 113                 goto done;
 114         }
 115
 116         /* post notification */
 117         ok = SCDynamicStoreNotifyValue(NULL, prefsPrivate->sessionKeyApply);
 118         if (!ok) {
 119                 SC_log(LOG_INFO, "SCDynamicStoreNotifyValue() failed");
 120                 _SCErrorSet(kSCStatusFailed);
 121         }
 122
 123     done :
 124
 125         if (!wasLocked) {
 126                 uint32_t        status;
 127
 128                 status = SCError();     // preserve status across unlock
 129                 (void) SCPreferencesUnlock(prefs);
 130                 _SCErrorSet(status);
 131         }
 132         return ok;
 133 }