patcyh.mm

   1 /* patcyh - you should pronounce it like patch
   2  * Copyright (C) 2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cydia is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cydia is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cydia.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <objc/runtime.h>
  23 #include <Foundation/Foundation.h>
  24
  25 @interface MIFileManager
  26 + (MIFileManager *) defaultManager;
  27 - (NSURL *) destinationOfSymbolicLinkAtURL:(NSURL *)url error:(NSError *)error;
  28 @end
  29
  30 static Class $MIFileManager;
  31
  32 static NSArray *(*_MIFileManager$urlsForItemsInDirectoryAtURL$ignoringSymlinks$error$)(MIFileManager *self, SEL _cmd, NSURL *url, BOOL ignoring, NSError *error);
  33
  34 static NSArray *$MIFileManager$urlsForItemsInDirectoryAtURL$ignoringSymlinks$error$(MIFileManager *self, SEL _cmd, NSURL *url, BOOL ignoring, NSError *error) {
  35     MIFileManager *manager(reinterpret_cast<MIFileManager *>([$MIFileManager defaultManager]));
  36     NSURL *destiny([manager destinationOfSymbolicLinkAtURL:url error:NULL]);
  37     if (destiny == nil)
  38         return _MIFileManager$urlsForItemsInDirectoryAtURL$ignoringSymlinks$error$(self, _cmd, url, NO, error);
  39
  40     NSArray *prefix([url pathComponents]);
  41     size_t skip([[destiny pathComponents] count]);
  42     NSMutableArray *items([NSMutableArray array]);
  43     for (NSURL *item in _MIFileManager$urlsForItemsInDirectoryAtURL$ignoringSymlinks$error$(self, _cmd, destiny, NO, error)) {
  44         NSArray *components([item pathComponents]);
  45         [items addObject:[NSURL fileURLWithPathComponents:[prefix arrayByAddingObjectsFromArray:[components subarrayWithRange:NSMakeRange(skip, [components count] - skip)]]]];
  46     }
  47
  48     NSLog(@"items = %@", items);
  49     return items;
  50 }
  51
  52 static NSString *(*_NSURL$path)(NSURL *self, SEL _cmd);
  53
  54 static NSString *$NSURL$path(NSURL *self, SEL _cmd) {
  55     return [[_NSURL$path(self, _cmd) mutableCopy] autorelease];
  56 }
  57
  58 static NSRange (*_NSString$rangeOfString$options$)(NSString *self, SEL _cmd, NSString *value, NSStringCompareOptions options);
  59
  60 static NSRange $NSString$rangeOfString$options$(NSString *self, SEL _cmd, NSString *value, NSStringCompareOptions options) {
  61     if ([value isEqualToString:@".app/"]) do {
  62         char *real(realpath("/Applications", NULL));
  63         NSString *destiny([NSString stringWithUTF8String:real]);
  64         free(real);
  65
  66         if ([destiny isEqualToString:@"/Applications"])
  67             break;
  68
  69         destiny = [destiny stringByAppendingString:@"/"];
  70         if (![self hasPrefix:destiny])
  71             break;
  72
  73         if (![self hasSuffix:@".app"])
  74             break;
  75
  76         BOOL directory;
  77         if (![[NSFileManager defaultManager] fileExistsAtPath:self isDirectory:&directory])
  78             break;
  79         if (!directory)
  80             break;
  81
  82         NSLog(@"path = %@", self);
  83         // the trailing / allows lsd to "restart" its verification attempt
  84         [(NSMutableString *) self setString:[NSString stringWithFormat:@"/Applications/%@/", [self substringFromIndex:[destiny length]]]];
  85     } while (false);
  86
  87     return _NSString$rangeOfString$options$(self, _cmd, value, options);
  88 }
  89
  90 __attribute__((__constructor__))
  91 static void initialize() {
  92     $MIFileManager = objc_getClass("MIFileManager");
  93
  94     if ($MIFileManager != Nil) {
  95         SEL sel(@selector(urlsForItemsInDirectoryAtURL:ignoringSymlinks:error:));
  96         if (Method method = class_getInstanceMethod($MIFileManager, sel)) {
  97             _MIFileManager$urlsForItemsInDirectoryAtURL$ignoringSymlinks$error$ = reinterpret_cast<NSArray *(*)(MIFileManager *, SEL, NSURL *, BOOL, NSError *)>(method_getImplementation(method));
  98             method_setImplementation(method, reinterpret_cast<IMP>(&$MIFileManager$urlsForItemsInDirectoryAtURL$ignoringSymlinks$error$));
  99         }
 100     }
 101
 102     if (Class $NSURL = objc_getClass("NSURL")) {
 103         SEL sel(@selector(path));
 104         if (Method method = class_getInstanceMethod($NSURL, sel)) {
 105             _NSURL$path = reinterpret_cast<NSString *(*)(NSURL *, SEL)>(method_getImplementation(method));
 106             method_setImplementation(method, reinterpret_cast<IMP>(&$NSURL$path));
 107         }
 108     }
 109
 110     if (Class $NSString = objc_getClass("NSString")) {
 111         SEL sel(@selector(rangeOfString:options:));
 112         if (Method method = class_getInstanceMethod($NSString, sel)) {
 113             _NSString$rangeOfString$options$ = reinterpret_cast<NSRange (*)(NSString *, SEL, NSString *, NSStringCompareOptions)>(method_getImplementation(method));
 114             method_setImplementation(method, reinterpret_cast<IMP>(&$NSString$rangeOfString$options$));
 115         }
 116     }
 117 }