%hook NSFileManager
- (BOOL)fileExistsAtPath:(NSString *)path {
    if ([path isEqualToString:@"/Applications/Cydia.app"] ||
        [path isEqualToString:@"/Library/MobileSubstrate/MobileSubstrate.dylib"] ||
        [path isEqualToString:@"/bin/bash"] ||
        [path isEqualToString:@"/usr/sbin/sshd"] ||
        [path isEqualToString:@"/etc/apt"] ||
        [path isEqualToString:@"/private/var/lib/apt/"]) {
        return NO;
    }

    return %orig;
}
%end

%hook UIApplication
- (BOOL)canOpenURL:(NSURL *)url {
    %log;
    return [[url absoluteString] isEqualToString:@"cydia://package/com.example.package"] ? NO : %orig;
}
%end

static FILE * (*orig_fopen) ( const char * filename, const char * mode );
FILE * new_fopen ( const char * filename, const char * mode ) {
    if (strcmp(filename, "/bin/bash") == 0) {
        return NULL;
    }
    return orig_fopen(filename, mode);
}

%ctor {
    MSHookFunction((void *)fopen, (void *)new_fopen, (void **)&orig_fopen);
}