On iOS 6+, killall backboardd to Exit Safe Mode.

[safemode-ios.git] / MobileSafety.mm

diff --git a/MobileSafety.mm b/MobileSafety.mm
index d62cab444f068cdbee1ad173b556de89fcf7a043..4a373d85c5fca5d9b5f0b3019271b01cc3513c27 100644 (file)
--- a/MobileSafety.mm
+++ b/MobileSafety.mm
@@ -1,5 +1,5 @@
 /* Cydia Substrate - Powerful Code Insertion Platform
 /* Cydia Substrate - Powerful Code Insertion Platform

- * Copyright (C) 2008-2011  Jay Freeman (saurik)
+ * Copyright (C) 2008-2012  Jay Freeman (saurik)

 */
 
 /* GNU Lesser General Public License, Version 3 {{{ */
 */
 
 /* GNU Lesser General Public License, Version 3 {{{ */


@@ -19,6 +19,22 @@
 **/
 /* }}} */
 
 **/
 /* }}} */
 

+%apt Package: com.saurik.substrate.safemode
+%apt Author: Jay Freeman (saurik) <saurik@saurik.com>
+
+%apt Name: Substrate Safe Mode
+%apt Description: safe mode safety extension (safe)
+
+%apt Depends: mobilesubstrate (>= 0.9.3367+38)
+
+%fflag 1
+%fflag 2
+
+%bundle com.apple.springboard
+
+%flag -framework Foundation
+%flag -framework UIKit
+

 #import <CoreFoundation/CoreFoundation.h>
 #import <Foundation/Foundation.h>
 #import <CoreGraphics/CGGeometry.h>
 #import <CoreFoundation/CoreFoundation.h>
 #import <Foundation/Foundation.h>
 #import <CoreGraphics/CGGeometry.h>


@@ -31,8 +47,15 @@ MSClassHook(UIStatusBar)
 MSClassHook(UIImage)
 MSMetaClassHook(UIImage)
 
 MSClassHook(UIImage)
 MSMetaClassHook(UIImage)
 

+MSClassHook(AAAccountManager)
+MSMetaClassHook(AAAccountManager)
+
+MSClassHook(BBSectionInfo)
+MSClassHook(BKSApplicationLaunchSettings)
+

 MSClassHook(SBAlertItemsController)
 MSClassHook(SBButtonBar)
 MSClassHook(SBAlertItemsController)
 MSClassHook(SBButtonBar)

+MSClassHook(SBIconController)

 MSClassHook(SBStatusBar)
 MSClassHook(SBStatusBarDataManager)
 MSClassHook(SBStatusBarTimeView)
 MSClassHook(SBStatusBar)
 MSClassHook(SBStatusBarDataManager)
 MSClassHook(SBStatusBarTimeView)


@@ -73,7 +96,11 @@ void SafeModeAlertItem$alertSheet$buttonClicked$(id self, SEL sel, id sheet, int
         break;
 
         case 2:
         break;
 
         case 2:

-            exit(0);
+            if (kCFCoreFoundationVersionNumber > 700)
+                system("killall backboardd");
+            else
+                // XXX: there are better ways of restarting SpringBoard that would actually save state
+                exit(0);

         break;
 
         case 3:
         break;
 
         case 3:


@@ -86,12 +113,14 @@ void SafeModeAlertItem$alertSheet$buttonClicked$(id self, SEL sel, id sheet, int
 
 void SafeModeAlertItem$configure$requirePasscodeForActions$(id self, SEL sel, BOOL configure, BOOL require) {
     UIAlertView *sheet([self alertSheet]);
 
 void SafeModeAlertItem$configure$requirePasscodeForActions$(id self, SEL sel, BOOL configure, BOOL require) {
     UIAlertView *sheet([self alertSheet]);

+

     [sheet setDelegate:self];
     [sheet setDelegate:self];

-    [sheet setBodyText:@"We apologize for the inconvenience, but SpringBoard has just crashed.\n\nMobileSubstrate /did not/ cause this problem: it has protected you from it.\n\nYour device is now running in Safe Mode. All extensions that support this safety system are disabled.\n\nReboot (or restart SpringBoard) to return to the normal mode. To return to this dialog touch the status bar."];
+    [sheet setBodyText:@"We apologize for the inconvenience, but SpringBoard has just crashed.\n\nMobileSubstrate /did not/ cause this problem: it has protected you from it.\n\nYour device is now running in Safe Mode. All extensions that support this safety system are disabled.\n\nReboot (or restart SpringBoard) to return to the normal mode. To return to this dialog touch the status bar.\n\nTap \"Help\" below for more tips."];

     [sheet addButtonWithTitle:@"OK"];
     [sheet addButtonWithTitle:@"Restart"];
     [sheet addButtonWithTitle:@"Help"];
     [sheet setNumberOfRows:1];
     [sheet addButtonWithTitle:@"OK"];
     [sheet addButtonWithTitle:@"Restart"];
     [sheet addButtonWithTitle:@"Help"];
     [sheet setNumberOfRows:1];

+

     if ([sheet respondsToSelector:@selector(setForceHorizontalButtonsLayout:)])
         [sheet setForceHorizontalButtonsLayout:YES];
 }
     if ([sheet respondsToSelector:@selector(setForceHorizontalButtonsLayout:)])
         [sheet setForceHorizontalButtonsLayout:YES];
 }


@@ -118,6 +147,9 @@ static void MSAlert() {
         [[$SBAlertItemsController sharedInstance] activateAlertItem:[[[$SafeModeAlertItem alloc] init] autorelease]];
 }
 
         [[$SBAlertItemsController sharedInstance] activateAlertItem:[[[$SafeModeAlertItem alloc] init] autorelease]];
 }
 

+
+// XXX: on iOS 5.0, we really would prefer avoiding 
+

 MSInstanceMessageHook2(void, SBStatusBar, touchesEnded,withEvent, id, touches, id, event) {
     MSAlert();
     MSOldCall(touches, event);
 MSInstanceMessageHook2(void, SBStatusBar, touchesEnded,withEvent, id, touches, id, event) {
     MSAlert();
     MSOldCall(touches, event);


@@ -133,6 +165,9 @@ MSInstanceMessageHook2(void, UIStatusBar, touchesBegan,withEvent, void *, touche
     MSOldCall(touches, event);
 }
 
     MSOldCall(touches, event);
 }
 

+
+// this fairly complex code came from Grant, to solve the "it Safe Mode"-in-bar bug
+

 MSInstanceMessageHook0(void, SBStatusBarDataManager, _updateTimeString) {
     char *_data(&MSHookIvar<char>(self, "_data"));
     if (_data == NULL)
 MSInstanceMessageHook0(void, SBStatusBarDataManager, _updateTimeString) {
     char *_data(&MSHookIvar<char>(self, "_data"));
     if (_data == NULL)


@@ -156,14 +191,38 @@ MSInstanceMessageHook0(void, SBStatusBarDataManager, _updateTimeString) {
     strcpy(timeString, "Exit Safe Mode");
 }
 
     strcpy(timeString, "Exit Safe Mode");
 }
 

-static void SBIconController$showInfoAlertIfNeeded(id self, SEL sel) {
-    static bool loaded = false;
-    if (loaded)
+
+static bool alerted_;
+
+static void AlertIfNeeded() {
+    if (alerted_)

         return;
         return;

-    loaded = true;
+    alerted_ = true;

     MSAlert();
 }
 
     MSAlert();
 }
 

+
+// on iOS 4.3 and above we can use this advertisement, which seems to check every time the user unlocks
+// XXX: verify that this still works on iOS 5.0
+
+MSClassMessageHook0(void, AAAccountManager, showMobileMeOfferIfNecessary) {
+    AlertIfNeeded();
+}
+
+
+// -[SBIconController showInfoAlertIfNeeded] explains how to drag icons around the iPhone home screen
+// it used to be shown to users when they unlocked their screen for the first time, and happened every unlock
+// however, as of iOS 4.3, it got relegated to only appearing once the user installed an app or web clip
+
+MSInstanceMessageHook0(void, SBIconController, showInfoAlertIfNeeded) {
+    AlertIfNeeded();
+}
+
+
+// the icon state, including crazy configurations like Five Icon Dock, is stored in SpringBoard's defaults
+// unfortunately, SpringBoard on iOS 2.0 and 2.1 (maybe 2.2 as well) buffer overrun with more than 4 icons
+// there is a third party package called IconSupport that remedies this, but not everyone is using it yet
+

 MSInstanceMessageHook0(int, SBButtonBar, maxIconColumns) {
     static int max;
     if (max == 0) {
 MSInstanceMessageHook0(int, SBButtonBar, maxIconColumns) {
     static int max;
     if (max == 0) {


@@ -181,6 +240,7 @@ MSInstanceMessageHook0(int, SBButtonBar, maxIconColumns) {
     } return max;
 }
 
     } return max;
 }
 

+

 MSInstanceMessageHook0(id, SBUIController, init) {
     if ((self = MSOldCall()) != nil) {
         UIView *&_contentLayer(MSHookIvar<UIView *>(self, "_contentLayer"));
 MSInstanceMessageHook0(id, SBUIController, init) {
     if ((self = MSOldCall()) != nil) {
         UIView *&_contentLayer(MSHookIvar<UIView *>(self, "_contentLayer"));


@@ -219,38 +279,24 @@ MSInstanceMessageHook0(void, SBStatusBarTimeView, tile) {
     _textRect.origin.y = (frame.size.height - size.height) / 2;
 }
 
     _textRect.origin.y = (frame.size.height - size.height) / 2;
 }
 

-#define Dylib_ "/Library/MobileSubstrate/MobileSubstrate.dylib"
-
-MSInitialize {
-    NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
-
-    NSLog(@"MS:Warning: Entering Safe Mode");
-
-    char *dil(getenv("DYLD_INSERT_LIBRARIES"));
-    if (dil == NULL)
-        NSLog(@"MS:Error: DYLD_INSERT_LIBRARIES is unset?");
-    else {
-        NSArray *dylibs([[NSString stringWithUTF8String:dil] componentsSeparatedByString:@":"]);
-        NSUInteger index([dylibs indexOfObject:@ Dylib_]);
-        if (index == NSNotFound)
-            NSLog(@"MS:Error: dylib not in DYLD_INSERT_LIBRARIES?");
-        else if ([dylibs count] == 1)
-            unsetenv("DYLD_INSERT_LIBRARIES");
-        else {
-            NSMutableArray *value([[[NSMutableArray alloc] init] autorelease]);
-            [value setArray:dylibs];
-            [value removeObjectAtIndex:index];
-            setenv("DYLD_INSERT_LIBRARIES", [[value componentsJoinedByString:@":"] UTF8String], !0);
-        }
-    }

 
 

-    $SBAlertItemsController = objc_getClass("SBAlertItemsController");
+// notification widgets ("wee apps" or "bulletin board sections") are capable of crashing SpringBoard
+// unfortunately, which ones are in use are stored in SpringBoard's defaults, so we need to turn them off

 
 

-    if (Class _class = objc_getClass("SBIconController")) {
-        SEL sel(@selector(showInfoAlertIfNeeded));
-        if (Method method = class_getInstanceMethod(_class, sel))
-            method_setImplementation(method, (IMP) &SBIconController$showInfoAlertIfNeeded);
-    }
+MSInstanceMessageHook0(BOOL, BBSectionInfo, showsInNotificationCenter) {
+    return NO;
+}
+
+
+// on iOS 6.0, Apple split parts of SpringBoard into a daemon called backboardd, including app launches
+// in order to allow safe mode to propogate into applications, we need to then tell backboardd here
+// XXX: (all of this should be replaced, however, with per-process launchd-mediated exception handling)
+
+MSInstanceMessageHook1(void, BKSApplicationLaunchSettings, setEnvironment, NSDictionary *, original) {
+    if (original == nil)
+        return MSOldCall(nil);

 
 

-    [pool release];
+    NSMutableDictionary *modified([original mutableCopy]);
+    [modified setObject:@"1" forKey:@"_MSSafeMode"];
+    return MSOldCall(modified);

 }
 }