--- /dev/null
+/*
+ * Copyright (c) 2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*
+ * InterfaceNamerControlPrefs.c
+ * - definitions for accessing InterfaceNamer control preferences
+ */
+
+/*
+ * Modification History
+ *
+ * January 12, 2017 Allan Nathanson (ajn@apple.com)
+ * - created
+ */
+
+#include <TargetConditionals.h>
+#include <SystemConfiguration/SystemConfiguration.h>
+#include <SystemConfiguration/SCPrivate.h>
+#include <SystemConfiguration/scprefs_observer.h>
+#include "InterfaceNamerControlPrefs.h"
+
+os_log_t __log_InterfaceNamer();
+
+/*
+ * kInterfaceNamerControlPrefsID
+ * - identifies the InterfaceNamer preferences file that contains 'AllowNewInterfaces'
+ */
+#define kInterfaceNamerControlPrefsIDStr "com.apple.InterfaceNamer.control.plist"
+#define kInterfaceNamerControlPrefsID CFSTR(kInterfaceNamerControlPrefsIDStr)
+
+/*
+ * kAllowNewInterfaces
+ * - indicates whether InterfaceNamer is allowed to create new interfaces
+ * while the screen is locked or not
+ */
+#define kAllowNewInterfaces CFSTR("AllowNewInterfaces")
+
+static SCPreferencesRef S_prefs;
+static InterfaceNamerControlPrefsCallBack S_callback;
+
+static SCPreferencesRef
+InterfaceNamerControlPrefsGet(void)
+{
+ if (S_prefs == NULL) {
+ InterfaceNamerControlPrefsInit(NULL, NULL);
+ }
+
+ return (S_prefs);
+}
+
+static void
+prefs_changed(void * arg)
+{
+#pragma unused(arg)
+ os_activity_t activity;
+
+ activity = os_activity_create("processing InterfaceNamer preference change",
+ OS_ACTIVITY_CURRENT,
+ OS_ACTIVITY_FLAG_DEFAULT);
+ os_activity_scope(activity);
+
+ /* get the current value */
+ if (S_callback != NULL) {
+ (*S_callback)(S_prefs);
+ }
+
+ os_release(activity);
+
+ return;
+}
+
+#if TARGET_OS_IPHONE
+/*
+ * kInterfaceNamerControlManangedPrefsID
+ * - identifies the location of the managed preferences file
+ */
+#define kManagedPrefsDirStr "/Library/Managed Preferences/mobile/"
+#define kInterfaceNamerControlManagedPrefsID CFSTR(kManagedPrefsDirStr \
+ kInterfaceNamerControlPrefsIDStr)
+static SCPreferencesRef S_managed_prefs;
+
+static SCPreferencesRef
+InterfaceNamerControlManagedPrefsGet(void)
+{
+ if (S_managed_prefs == NULL) {
+ CFMutableDictionaryRef options;
+
+ options = CFDictionaryCreateMutable(NULL,
+ 0,
+ &kCFTypeDictionaryKeyCallBacks,
+ &kCFTypeDictionaryValueCallBacks);
+ CFDictionarySetValue(options, kSCPreferencesOptionRemoveWhenEmpty, kCFBooleanTrue);
+ S_managed_prefs = SCPreferencesCreateWithOptions(NULL,
+ CFSTR("InterfaceNamerControlPrefs"),
+ kInterfaceNamerControlManagedPrefsID,
+ NULL,
+ options);
+ CFRelease(options);
+ }
+ return (S_managed_prefs);
+}
+
+static void
+enable_prefs_observer(CFRunLoopRef runloop)
+{
+ CFRunLoopSourceContext context;
+ dispatch_queue_t queue;
+ CFRunLoopSourceRef source;
+
+ bzero(&context, sizeof(context));
+ context.perform = prefs_changed;
+ source = CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context);
+ CFRunLoopAddSource(runloop, source, kCFRunLoopCommonModes);
+ queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
+ _scprefs_observer_watch(scprefs_observer_type_global,
+ kInterfaceNamerControlPrefsIDStr,
+ queue,
+ ^{
+ if (source != NULL) {
+ CFRunLoopSourceSignal(source);
+ if (runloop != NULL) {
+ CFRunLoopWakeUp(runloop);
+ }
+ };
+ });
+ return;
+}
+
+#else /* TARGET_OS_IPHONE */
+
+static void
+enable_prefs_observer(CFRunLoopRef runloop)
+{
+#pragma unused(runloop)
+ return;
+}
+
+#endif /* TARGET_OS_IPHONE */
+
+static void
+InterfaceNamerControlPrefsChanged(SCPreferencesRef prefs,
+ SCPreferencesNotification type,
+ void *info)
+{
+#pragma unused(prefs)
+#pragma unused(type)
+#pragma unused(info)
+ prefs_changed(NULL);
+ return;
+}
+
+__private_extern__ SCPreferencesRef
+InterfaceNamerControlPrefsInit(CFRunLoopRef runloop,
+ InterfaceNamerControlPrefsCallBack callback)
+{
+ CFMutableDictionaryRef options;
+
+ options = CFDictionaryCreateMutable(NULL,
+ 0,
+ &kCFTypeDictionaryKeyCallBacks,
+ &kCFTypeDictionaryValueCallBacks);
+ CFDictionarySetValue(options, kSCPreferencesOptionRemoveWhenEmpty, kCFBooleanTrue);
+ S_prefs = SCPreferencesCreateWithOptions(NULL,
+ CFSTR("InterfaceNamerControlPrefs"),
+ kInterfaceNamerControlPrefsID,
+ NULL,
+ options);
+ CFRelease(options);
+
+ if ((runloop != NULL) && (callback != NULL)) {
+ S_callback = callback;
+ if (!SCPreferencesSetCallback(S_prefs, InterfaceNamerControlPrefsChanged, NULL)) {
+ SC_log(LOG_NOTICE, "SCPreferencesSetCallBack() failed: %s", SCErrorString(SCError()));
+ goto done;
+ }
+
+ if (!SCPreferencesScheduleWithRunLoop(S_prefs, runloop, kCFRunLoopCommonModes)) {
+ SC_log(LOG_NOTICE, "SCPreferencesScheduleWithRunLoop() failed: %s", SCErrorString(SCError()));
+ (void) SCPreferencesSetCallback(S_prefs, NULL, NULL);
+ }
+
+ enable_prefs_observer(runloop);
+ }
+
+ done :
+ return (S_prefs);
+}
+
+static Boolean
+InterfaceNamerControlPrefsSave(void)
+{
+ Boolean saved = FALSE;
+
+ if (S_prefs != NULL) {
+ saved = SCPreferencesCommitChanges(S_prefs);
+ SCPreferencesSynchronize(S_prefs);
+ }
+ return (saved);
+}
+
+static CFBooleanRef
+prefs_get_boolean(CFStringRef key)
+{
+ CFBooleanRef b = NULL;
+ SCPreferencesRef prefs;
+
+#if TARGET_OS_IPHONE
+ prefs = InterfaceNamerControlManagedPrefsGet();
+ if (prefs != NULL) {
+ b = SCPreferencesGetValue(prefs, key);
+ b = isA_CFBoolean(b);
+ if (b != NULL) {
+ return (b);
+ }
+ }
+#endif /* TARGET_OS_IPHONE */
+
+ prefs = InterfaceNamerControlPrefsGet();
+ if (prefs != NULL) {
+ b = SCPreferencesGetValue(prefs, key);
+ b = isA_CFBoolean(b);
+ }
+ return (b);
+}
+
+static void
+prefs_set_boolean(CFStringRef key, CFBooleanRef b)
+{
+ SCPreferencesRef prefs;
+
+ prefs = InterfaceNamerControlPrefsGet();
+ if (prefs != NULL) {
+ if (isA_CFBoolean(b) == NULL) {
+ SCPreferencesRemoveValue(prefs, key);
+ }
+ else {
+ SCPreferencesSetValue(prefs, key, b);
+ }
+ }
+ return;
+}
+
+static void
+InterfaceNamerControlPrefsRefresh(void)
+{
+ if (S_prefs != NULL) {
+ SCPreferencesSynchronize(S_prefs);
+ }
+#if TARGET_OS_IPHONE
+ if (S_managed_prefs != NULL) {
+ SCPreferencesSynchronize(S_managed_prefs);
+ }
+#endif /* TARGET_OS_IPHONE */
+ return;
+}
+
+/**
+ ** Get
+ **/
+__private_extern__ Boolean
+InterfaceNamerControlPrefsAllowNewInterfaces(void)
+{
+ CFBooleanRef b;
+ Boolean allow = FALSE;
+
+ b = prefs_get_boolean(kAllowNewInterfaces);
+ if (b != NULL) {
+ allow = CFBooleanGetValue(b);
+ }
+ /* flush the backing store */
+ InterfaceNamerControlPrefsRefresh();
+ return (allow);
+}
+
+/**
+ ** Set
+ **/
+__private_extern__ Boolean
+InterfaceNamerControlPrefsSetAllowNewInterfaces(Boolean allow)
+{
+ if (allow) {
+ prefs_set_boolean(kAllowNewInterfaces, kCFBooleanTrue);
+ } else {
+ prefs_set_boolean(kAllowNewInterfaces, NULL);
+ }
+ return (InterfaceNamerControlPrefsSave());
+}
projects / apple / configd.git / blobdiff