SystemConfiguration.fproj/SCPGet.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2004, 2016 Apple Computer, 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 <fcntl.h>
  35 #include <unistd.h>
  36 #include <sys/errno.h>
  37
  38 #include "SCPreferencesInternal.h"
  39
  40 CFPropertyListRef
  41 SCPreferencesGetValue(SCPreferencesRef prefs, CFStringRef key)
  42 {
  43         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  44         CFPropertyListRef       value;
  45
  46         if (prefs == NULL) {
  47                 /* sorry, you must provide a session */
  48                 _SCErrorSet(kSCStatusNoPrefsSession);
  49                 return NULL;
  50         }
  51
  52         __SCPreferencesAccess(prefs);
  53
  54         value = CFDictionaryGetValue(prefsPrivate->prefs, key);
  55         if (value == NULL) {
  56                 _SCErrorSet(kSCStatusNoKey);
  57         }
  58
  59         return value;
  60 }