SystemConfiguration.fproj/SCPApply.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2004-2006, 2010, 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  * November 9, 2000             Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "SCPreferencesInternal.h"
  35 #include "SCHelper_client.h"
  36
  37
  38 static Boolean
  39 __SCPreferencesApplyChanges_helper(SCPreferencesRef prefs)
  40 {
  41         Boolean                 ok;
  42         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  43         uint32_t                status          = kSCStatusOK;
  44
  45         if (prefsPrivate->helper_port == MACH_PORT_NULL) {
  46                 // if no helper
  47                 goto fail;
  48         }
  49
  50         // have the helper "apply" the prefs
  51 //      status = kSCStatusOK;
  52         ok = _SCHelperExec(prefsPrivate->helper_port,
  53                            SCHELPER_MSG_PREFS_APPLY,
  54                            NULL,
  55                            &status,
  56                            NULL);
  57         if (!ok) {
  58                 goto fail;
  59         }
  60
  61         if (status != kSCStatusOK) {
  62                 goto error;
  63         }
  64
  65         return TRUE;
  66
  67     fail :
  68
  69         // close helper
  70         if (prefsPrivate->helper_port != MACH_PORT_NULL) {
  71                 _SCHelperClose(&prefsPrivate->helper_port);
  72         }
  73
  74         status = kSCStatusAccessError;
  75
  76     error :
  77
  78         // return error
  79         _SCErrorSet(status);
  80         return FALSE;
  81 }
  82
  83
  84 Boolean
  85 SCPreferencesApplyChanges(SCPreferencesRef prefs)
  86 {
  87         Boolean                 ok              = FALSE;
  88         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  89         Boolean                 wasLocked;
  90
  91         if (prefs == NULL) {
  92                 /* sorry, you must provide a session */
  93                 _SCErrorSet(kSCStatusNoPrefsSession);
  94                 return FALSE;
  95         }
  96
  97         /*
  98          * Determine if the we have exclusive access to the preferences
  99          * and acquire the lock if necessary.
 100          */
 101         wasLocked = prefsPrivate->locked;
 102         if (!wasLocked) {
 103                 if (!SCPreferencesLock(prefs, TRUE)) {
 104                         SC_log(LOG_INFO, "SCPreferencesLock() failed");
 105                         return FALSE;
 106                 }
 107         }
 108
 109         if (prefsPrivate->authorizationData != NULL) {
 110                 ok = __SCPreferencesApplyChanges_helper(prefs);
 111                 goto done;
 112         }
 113
 114         SC_log(LOG_INFO, "SCPreferences() apply: %s",
 115                prefsPrivate->newPath ? prefsPrivate->newPath : prefsPrivate->path);
 116
 117         /* post notification */
 118         ok = SCDynamicStoreNotifyValue(NULL, prefsPrivate->sessionKeyApply);
 119         if (!ok) {
 120                 SC_log(LOG_INFO, "SCDynamicStoreNotifyValue() failed");
 121                 _SCErrorSet(kSCStatusFailed);
 122         }
 123
 124     done :
 125
 126         if (!wasLocked) {
 127                 uint32_t        status;
 128
 129                 status = SCError();     // preserve status across unlock
 130                 (void) SCPreferencesUnlock(prefs);
 131                 _SCErrorSet(status);
 132         }
 133         return ok;
 134 }