sbreload.m

#import <dlfcn.h>
#import <objc/runtime.h>
#import <Foundation/Foundation.h>

typedef NS_OPTIONS(NSUInteger, SBSRelaunchActionOptions) {
	SBSRelaunchActionOptionsNone,
	SBSRelaunchActionOptionsRestartRenderServer = 1 << 0,
	SBSRelaunchActionOptionsSnapshotTransition = 1 << 1,
	SBSRelaunchActionOptionsFadeToBlackTransition = 1 << 2
};

@interface SBSRelaunchAction : NSObject
+ (instancetype)actionWithReason:(NSString *)reason options:(SBSRelaunchActionOptions)options targetURL:(NSURL *)targetURL;
@end

@interface FBSSystemService : NSObject
+ (instancetype)sharedService;
- (void)sendActions:(NSSet *)actions withResult:(id)result;
@end

pid_t springboardPID;
pid_t backboarddPID;

int stopService(const char *ServiceName);
int updatePIDs(void);

/* Set platform binary flag */
#define FLAG_PLATFORMIZE (1 << 1)

void platformizeme() {
    void* handle = dlopen("/usr/lib/libjailbreak.dylib", RTLD_LAZY);
    if (!handle) return;
    
    // Reset errors
    dlerror();
    typedef void (*fix_entitle_prt_t)(pid_t pid, uint32_t what);
    fix_entitle_prt_t ptr = (fix_entitle_prt_t)dlsym(handle, "jb_oneshot_entitle_now");
    
    const char *dlsym_error = dlerror();
    if (dlsym_error) {
        return;
    }
    
    ptr(getpid(), FLAG_PLATFORMIZE);
}

int main(){
	@autoreleasepool {
		platformizeme();

		springboardPID = 0;
		backboarddPID = 0;

		updatePIDs();

		dlopen("/System/Library/PrivateFrameworks/FrontBoardServices.framework/FrontBoardServices", RTLD_NOW);
		dlopen("/System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices", RTLD_NOW);

		SBSRelaunchAction *restartAction = [objc_getClass("SBSRelaunchAction") actionWithReason:@"respring" options:(SBSRelaunchActionOptionsRestartRenderServer | SBSRelaunchActionOptionsFadeToBlackTransition) targetURL:nil];
		[(FBSSystemService *)[objc_getClass("FBSSystemService") sharedService] sendActions:[NSSet setWithObject:restartAction] withResult:nil];
		sleep(2);

		int old_springboardPID = springboardPID;
		int old_backboarddPID = backboarddPID;

		updatePIDs();

		if (springboardPID == old_springboardPID){
			stopService("com.apple.SpringBoard");
		}
		if (backboarddPID == old_backboarddPID){
			stopService("com.apple.backboardd");
		}
	}
	return 0;
}