Stop SpringBoard while we are messing with lsd.

[uikittools.git] / gssc.mm

diff --git a/gssc.mm b/gssc.mm
index 0c40ed51830b21902afd77cd90429f2aa5bb3d6f..fc18d11148253e0bf7380def2b63b6dc71a674e6 100644 (file)
--- a/gssc.mm
+++ b/gssc.mm
@@ -1,18 +1,71 @@
+/* UIKit Tools - command-line utilities for UIKit
+ * Copyright (C) 2008-2012  Jay Freeman (saurik)
+*/
+
+/* Modified BSD License {{{ */
+/*
+ *        Redistribution and use in source and binary
+ * forms, with or without modification, are permitted
+ * provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the
+ *    above copyright notice, this list of conditions
+ *    and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the
+ *    above copyright notice, this list of conditions
+ *    and the following disclaimer in the documentation
+ *    and/or other materials provided with the
+ *    distribution.
+ * 3. The name of the author may not be used to endorse
+ *    or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/* }}} */
+
 #import <GraphicsServices/GraphicsServices.h>
 #import <UIKit/UIKit.h>
 #include <stdio.h>
 #include <dlfcn.h>
+#include <objc/runtime.h>
 
 static CFArrayRef (*$GSSystemCopyCapability)(CFStringRef);
 static CFArrayRef (*$GSSystemGetCapability)(CFStringRef);
 
+void OnGSCapabilityChanged(
+    CFNotificationCenterRef center,
+    void *observer,
+    CFStringRef name,
+    const void *object,
+    CFDictionaryRef info
+) {
+    CFRunLoopStop(CFRunLoopGetCurrent());
+}
+
 int main(int argc, char *argv[]) {
-    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    dlopen("/System/Library/Frameworks/Foundation.framework/Foundation", RTLD_GLOBAL | RTLD_LAZY);
+    dlopen("/System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices", RTLD_GLOBAL | RTLD_LAZY);
+
+    NSAutoreleasePool *pool = [[objc_getClass("NSAutoreleasePool") alloc] init];
 
     NSString *name = nil;
 
     if (argc == 2)
-        name = [NSString stringWithUTF8String:argv[0]];
+        name = [objc_getClass("NSString") stringWithUTF8String:argv[0]];
     else if (argc > 2) {
         fprintf(stderr, "usage: %s [capability]\n", argv[0]);
         exit(1);
@@ -21,20 +74,36 @@ int main(int argc, char *argv[]) {
     $GSSystemCopyCapability = reinterpret_cast<CFArrayRef (*)(CFStringRef)>(dlsym(RTLD_DEFAULT, "GSSystemCopyCapability"));
     $GSSystemGetCapability = reinterpret_cast<CFArrayRef (*)(CFStringRef)>(dlsym(RTLD_DEFAULT, "GSSystemGetCapability"));
 
+    CFNotificationCenterAddObserver(
+        CFNotificationCenterGetDarwinNotifyCenter(),
+        NULL,
+        &OnGSCapabilityChanged,
+        CFSTR("GSCapabilitiesChanged"),
+        NULL,
+        NULL
+    );
+
     const NSArray *capability;
 
-    if ($GSSystemCopyCapability != NULL) {
-        capability = reinterpret_cast<const NSArray *>((*$GSSystemCopyCapability)(reinterpret_cast<CFStringRef>(name)));
-        capability = [capability autorelease];
-    } else if ($GSSystemGetCapability != NULL) {
-        capability = reinterpret_cast<const NSArray *>((*$GSSystemGetCapability)(reinterpret_cast<CFStringRef>(name)));
-    } else
-        capability = nil;
+    for (;;) {
+        if ($GSSystemCopyCapability != NULL) {
+            capability = reinterpret_cast<const NSArray *>((*$GSSystemCopyCapability)(reinterpret_cast<CFStringRef>(name)));
+            if (capability != nil)
+                capability = [capability autorelease];
+        } else if ($GSSystemGetCapability != NULL) {
+            capability = reinterpret_cast<const NSArray *>((*$GSSystemGetCapability)(reinterpret_cast<CFStringRef>(name)));
+        } else {
+            capability = nil;
+            break;
+        }
 
-    NSLog(@"%@", capability);
+        if (capability != nil)
+            break;
+
+        CFRunLoopRun();
+    }
 
-    /*for (NSString *value in capability)
-        printf("%s\n", [value UTF8String]);*/
+    printf("%s\n", capability == nil ? "(null)" : [[capability description] UTF8String]);
 
     [pool release];