From 4975f170949298759cf6faa7b81bb364e7df3c61 Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Wed, 6 Feb 2013 14:12:31 +0000
Subject: Use MobileInstallation framework to fix caches.

---
 extrainst_.mm  | 35 +++++++++++++++++++++--------------
 extrainst_.xml | 10 ++++++++++
 2 files changed, 31 insertions(+), 14 deletions(-)
 create mode 100644 extrainst_.xml

diff --git a/extrainst_.mm b/extrainst_.mm
index 2554c0e..9a6a679 100644
--- a/extrainst_.mm
+++ b/extrainst_.mm
@@ -43,6 +43,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <dlfcn.h>
 
 #include "csstore.hpp"
 
@@ -99,24 +100,30 @@ bool FinishCydia(const char *finish) {
 }
 
 void FixCache(NSString *home, NSString *plist) {
-    printf("attempting to fix weather app issue:\n");
+    printf("attempting to fix weather app issue, please wait...\n");
 
     DeleteCSStores([home UTF8String]);
     unlink([plist UTF8String]);
 
-    system("launchctl stop com.apple.mobile.installd");
-    system("launchctl start com.apple.mobile.installd");
-
-    printf("waiting for application/icon cache rebuild...\n");
-    printf("this will timeout (harmlessly) after 90 seconds\n");
-
-    for (unsigned i(0); i != 90; ++i) {
-        if (i != 0 && (i % 10) == 0)
-            printf("after %i seconds, still waiting for rebuild...\n", i);
-        if ([[NSMutableDictionary dictionaryWithContentsOfFile: plist] objectForKey: @"User"] != nil)
-            break;
-        sleep(1);
-    }
+    bool succeeded(false);
+
+    if (void *MobileInstallation$ = dlopen("/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation", RTLD_GLOBAL | RTLD_LAZY)) {
+        int (*MobileInstallation$_MobileInstallationRebuildMap)(CFBooleanRef, CFBooleanRef, CFBooleanRef);
+        MobileInstallation$_MobileInstallationRebuildMap = reinterpret_cast<int (*)(CFBooleanRef, CFBooleanRef, CFBooleanRef)>(dlsym(MobileInstallation$, "_MobileInstallationRebuildMap"));
+        if (MobileInstallation$_MobileInstallationRebuildMap != NULL) {
+            if (int error = MobileInstallation$_MobileInstallationRebuildMap(kCFBooleanTrue, kCFBooleanTrue, kCFBooleanTrue))
+                printf("failed to rebuild cache (but we gave it a good try); error #%d\n", error);
+            else {
+                printf("successfully rebuilt application information cache.\n");
+                succeeded = true;
+            }
+        } else
+            printf("unable to find _MobileInstallationRebuildMap symbol.\n");
+    } else
+        printf("unable to load MobileInstallation library.\n");
+
+    if (!succeeded)
+        printf("this is not a problem: it will be regenerated as the device boots\n");
 
     if (!FinishCydia("reboot"))
         printf("you must reboot to finalize your cache.\n");
diff --git a/extrainst_.xml b/extrainst_.xml
new file mode 100644
index 0000000..0829339
--- /dev/null
+++ b/extrainst_.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.private.mobileinstall.allowedSPI</key>
+	<array>
+		<string>RebuildMaps</string>
+	</array>
+</dict>
+</plist>
-- 
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