protected RubySystemCallError(Ruby runtime,
    RubyClass rubyClass) 
{
     
        defaultMessages.put("Errno::EPERM", "Operation not permitted");
        defaultMessages.put("Errno::ENOENT", "No such file or directory");
        defaultMessages.put("Errno::ESRCH", "No such process");
        defaultMessages.put("Errno::EINTR", "Interrupted system call");
        defaultMessages.put("Errno::EIO", "Input/output error");
        defaultMessages.put("Errno::ENXIO", "Device not configured");
        defaultMessages.put("Errno::E2BIG", "Argument list too long");
        defaultMessages.put("Errno::ENOEXEC", "Exec format error");
        defaultMessages.put("Errno::EBADF", "Bad file descriptor");
        defaultMessages.put("Errno::ECHILD", "No child processes");
        defaultMessages.put("Errno::EDEADLK", "Resource deadlock avoided");
        defaultMessages.put("Errno::ENOMEM", "Cannot allocate memory");
        defaultMessages.put("Errno::EACCES", "Permission denied");
        defaultMessages.put("Errno::EFAULT", "Bad address");
        defaultMessages.put("Errno::ENOTBLK", "Block device required");
        defaultMessages.put("Errno::EBUSY", "Resource busy");
        defaultMessages.put("Errno::EEXIST", "File exists");
        defaultMessages.put("Errno::EXDEV", "Cross-device link");
        defaultMessages.put("Errno::ENODEV", "Operation not supported by device");
        defaultMessages.put("Errno::ENOTDIR", "Not a directory");
        defaultMessages.put("Errno::EISDIR", "Is a directory");
        defaultMessages.put("Errno::EINVAL", "Invalid argument");
        defaultMessages.put("Errno::ENFILE", "Too many open files in system");
        defaultMessages.put("Errno::EMFILE", "Too many open files");
        defaultMessages.put("Errno::ENOTTY", "Inappropriate ioctl for device");
        defaultMessages.put("Errno::ETXTBSY", "Text file busy");
        defaultMessages.put("Errno::EFBIG", "File too large");
        defaultMessages.put("Errno::ENOSPC", "No space left on device");
        defaultMessages.put("Errno::ESPIPE", "Illegal seek");
        defaultMessages.put("Errno::EROFS", "Read-only file system");
        defaultMessages.put("Errno::EMLINK", "Too many links");
        defaultMessages.put("Errno::EPIPE", "Broken pipe");
        defaultMessages.put("Errno::EDOM", "Numerical argument out of domain");
        defaultMessages.put("Errno::ERANGE", "Result too large");
        defaultMessages.put("Errno::EAGAIN", "Resource temporarily unavailable");
        defaultMessages.put("Errno::EWOULDBLOCK", "Resource temporarily unavailable");
        defaultMessages.put("Errno::EINPROGRESS", "Operation now in progress");
        defaultMessages.put("Errno::EALREADY", "Operation already in progress");
        defaultMessages.put("Errno::ENOTSOCK", "Socket operation on non-socket");
        defaultMessages.put("Errno::EDESTADDRREQ", "Destination address required");
        defaultMessages.put("Errno::EMSGSIZE", "Message too long");
        defaultMessages.put("Errno::EPROTOTYPE", "Protocol wrong type for socket");
        defaultMessages.put("Errno::ENOPROTOOPT", "Protocol not available");
        defaultMessages.put("Errno::EPROTONOSUPPORT", "Protocol not supported");
        defaultMessages.put("Errno::ESOCKTNOSUPPORT", "Socket type not supported");
        defaultMessages.put("Errno::EPFNOSUPPORT", "Protocol family not supported");
        defaultMessages.put("Errno::EAFNOSUPPORT", "Address family not supported by protocol family");
        defaultMessages.put("Errno::EADDRINUSE", "Address already in use");
        defaultMessages.put("Errno::EADDRNOTAVAIL", "Can't assign requested address");
        defaultMessages.put("Errno::ENETDOWN", "Network is down");
        defaultMessages.put("Errno::ENETUNREACH", "Network is unreachable");
        defaultMessages.put("Errno::ENETRESET", "Network dropped connection on reset");
        defaultMessages.put("Errno::ECONNABORTED", "Software caused connection abort");
        defaultMessages.put("Errno::ECONNRESET", "Connection reset by peer");
        defaultMessages.put("Errno::ENOBUFS", "No buffer space available");
        defaultMessages.put("Errno::EISCONN", "Socket is already connected");
        defaultMessages.put("Errno::ENOTCONN", "Socket is not connected");
        defaultMessages.put("Errno::ESHUTDOWN", "Can't send after socket shutdown");
        defaultMessages.put("Errno::ETOOMANYREFS", "Too many references: can't splice");
        defaultMessages.put("Errno::ETIMEDOUT", "Operation timed out");
        defaultMessages.put("Errno::ECONNREFUSED", "Connection refused");
        defaultMessages.put("Errno::ELOOP", "Too many levels of symbolic links");
        defaultMessages.put("Errno::ENAMETOOLONG", "File name too long");
        defaultMessages.put("Errno::EHOSTDOWN", "Host is down");
        defaultMessages.put("Errno::EHOSTUNREACH", "No route to host");
        defaultMessages.put("Errno::ENOTEMPTY", "Directory not empty");
        defaultMessages.put("Errno::EUSERS", "Too many users");
        defaultMessages.put("Errno::EDQUOT", "Disc quota exceeded");
        defaultMessages.put("Errno::ESTALE", "Stale NFS file handle");
        defaultMessages.put("Errno::EREMOTE", "Too many levels of remote in path");
        defaultMessages.put("Errno::ENOLCK", "No locks available");
        defaultMessages.put("Errno::ENOSYS", "Function not implemented");
        defaultMessages.put("Errno::EOVERFLOW", "Value too large to be stored in data type");
        defaultMessages.put("Errno::EIDRM", "Identifier removed");
        defaultMessages.put("Errno::ENOMSG", "No message of desired type");
        defaultMessages.put("Errno::EILSEQ", "Illegal byte sequence");
        defaultMessages.put("Errno::EBADMSG", "Bad message");
        defaultMessages.put("Errno::EMULTIHOP", "EMULTIHOP (Reserved)");
        defaultMessages.put("Errno::ENODATA", "No message available on STREAM");
        defaultMessages.put("Errno::ENOLINK", "ENOLINK (Reserved)");
        defaultMessages.put("Errno::ENOSR", "No STREAM resources");
        defaultMessages.put("Errno::ENOSTR", "Not a STREAM");
        defaultMessages.put("Errno::EPROTO", "Protocol error");
        defaultMessages.put("Errno::ETIME", "STREAM ioctl timeout");
        defaultMessages.put("Errno::EOPNOTSUPP", "Operation not supported");
        defaultMessages.put("Errno::EOPNOTSUPP_DARWIN", "Operation not supported");
        super(runtime, rubyClass, null);
}

 public RubySystemCallError(Ruby runtime,
    RubyClass rubyClass,
    String message,
    int errno) 
{
        super(runtime, rubyClass, message);
        this.errno = runtime.newFixnum(errno);
}

 public static RubyClass createSystemCallErrorClass(Ruby runtime,
    RubyClass standardError) 
{
           
        RubyClass exceptionClass = runtime.defineClass("SystemCallError", standardError, SYSTEM_CALL_ERROR_ALLOCATOR);
        exceptionClass.setMarshal(SYSTEM_CALL_ERROR_MARSHAL);
        runtime.callbackFactory(RubyClass.class);
        exceptionClass.defineAnnotatedMethods(RubySystemCallError.class);
        return exceptionClass;
}

 public IRubyObject errno() 
{
        return errno;
}

 public IRubyObject initialize(IRubyObject[] args,
    Block block) 
{
        RubyClass sCallErorrClass = getRuntime().getSystemCallError();
        RubyClass klass = getMetaClass().getRealClass();
        IRubyObject msg = getRuntime().getNil();
        IRubyObject err = getRuntime().getNil();
        boolean isErrnoClass = !klass.equals(sCallErorrClass);
        if (!isErrnoClass) {
            // one optional, one required args
            Arity.checkArgumentCount(getRuntime(), args, 1, 2);
            msg = args[0];
            if (args.length == 2) {
                err = args[1];
            }
            if (args.length == 1 && (msg instanceof RubyFixnum)) {
                err = msg;
                msg = getRuntime().getNil();
            }
        } else {
            // one optional and no required args
            Arity.checkArgumentCount(getRuntime(), args, 0, 1);
            if (args.length == 1) {
                msg = args[0];
            }
            // try to get errno out of the class 
            err = klass.fastGetConstant("Errno");
        }
        if (!err.isNil()) {
            errno = err.convertToInteger();
        }
        String val = defaultMessages.get(klass.getName());
        if (val == null) {
            val = "Unknown error";
        }
        // MRI behavior: we don't print errno for actual Errno errors
        if (!errno.isNil() && !isErrnoClass) {
            val += " " + errno.toString();
        }
        if (!msg.isNil()) {
            val += " - " + msg.convertToString();
        }
        message = getRuntime().newString(val);        
        return this;
}