Dirty hack to enable using skype as a shell with something like "/echo testing"

infest.cy

//sudo cycript -p Skype
@import com.saurik.substrate.MS
var get = function(name)
{
    func_ = dlsym(RTLD_DEFAULT, name)
    func = function() { var types = 'v', args = [], count = arguments.length; for (var i = 0; i != count; ++i) { types += '@'; args.push(arguments[i]); } new Functor(func_, types).apply(null, args); };
    return func
}
NSLog = get("NSLog");

var send_message = function(msg)
{
    var delegate = choose(ChatInputTextView)[0].delegate;
    delegate.inputText = msg;
    [delegate postInputText];
}
var path_for_command = function(cmd) // blocks
{
    var task = [[NSTask alloc] init];
    var pipe = [NSPipe pipe];
    [task setLaunchPath:@"/usr/bin/which"];
    [task setArguments:@[cmd]];
    [task setStandardOutput:pipe];
    [task launch];
    [task waitUntilExit];
    [task release];
    var ret = [[NSString alloc] initWithData:[[pipe fileHandleForReading] readDataToEndOfFile] encoding:4];
    return [ret stringByReplacingOccurrencesOfString:@"\n" withString:@""];
}
var run_command = function(cmd) // blocks
{
    cmd = [cmd componentsSeparatedByString:@" "];
    var run = path_for_command(cmd[0]);
    if (![[NSFileManager defaultManager] isExecutableFileAtPath:run])
    {
        return false;
    }
    var args = [cmd mutableCopy];
    [args removeObjectAtIndex:0];
    var out = [NSPipe pipe];
    var task = [[NSTask alloc] init];
    [task setLaunchPath:run];
    [task setArguments:args];
    [task setStandardOutput:out];
    [task launch];
    [task waitUntilExit];
    [task release];
    return [[NSString alloc] initWithData:[[out fileHandleForReading] readDataToEndOfFile] encoding:4];
}
var hookPostInputText = function()
{
    var oldm = {};
    NSLog(@"Hooking [PanAmericanChatInputViewController postInputText]");
    MS.hookMessage(PanAmericanChatInputViewController, @selector(postInputText), function() {
        var delegate = choose(ChatInputTextView)[0].delegate;
        var msg = delegate.inputText;
        if ([msg hasPrefix:@"/"])
        {
            msg = [msg substringFromIndex:1];
            if (!([msg hasPrefix:@"me"] || [msg hasPrefix:@"add"] || [msg hasPrefix:@"alertson"] || [msg hasPrefix:@"alertsoff"] || [msg hasPrefix:@"help"]))
            {
                NSLog(@"Received a command: %@", msg);
                var output = run_command(msg);
                if (output)
                {
                    delegate.inputText = output;
                }
                else
                {
                    var notFoundAlert = [[NSAlert alloc] init];
                    [notFoundAlert setMessageText: @"Sorry..."];
                    [notFoundAlert setInformativeText:@"Command not found"];
                    [notFoundAlert runModal];
                    delegate.inputText = "";
                    return;
                }
            }
        }
        return oldm->call(this);
    }, oldm);
}
hookPostInputText()