public:

static void Initialize(Handle<Object> target) {

HandleScope scope;

HandleWrap::Initialize(target);

Local<FunctionTemplate> constructor = FunctionTemplate::New(New);

constructor->InstanceTemplate()->SetInternalFieldCount(1);

constructor->SetClassName(String::NewSymbol("Process"));

NODE_SET_PROTOTYPE_METHOD(constructor, "close", HandleWrap::Close);

NODE_SET_PROTOTYPE_METHOD(constructor, "spawn", Spawn);

NODE_SET_PROTOTYPE_METHOD(constructor, "kill", Kill);

target->Set(String::NewSymbol("Process"), constructor->GetFunction());

}

private:

static Handle<Value> New(const Arguments& args) {

// This constructor should not be exposed to public javascript.

// Therefore we assert that we are not trying to call this as a

// normal function.

assert(args.IsConstructCall());

HandleScope scope;

ProcessWrap *wrap = new ProcessWrap(args.This());

assert(wrap);

return scope.Close(args.This());

}

ProcessWrap(Handle<Object> object) : HandleWrap(object, NULL) { }

~ProcessWrap() { }

static Handle<Value> Spawn(const Arguments& args) {

HandleScope scope;

UNWRAP

Local<Object> js_options = args[0]->ToObject();

uv_process_options_t options;

memset(&options, 0, sizeof(uv_process_options_t));

options.exit_cb = OnExit;

// TODO is this possible to do without mallocing ?

// options.file

Local<Value> file_v = js_options->Get(String::New("file"));

if (!file_v.IsEmpty() && file_v->IsString()) {

String::Utf8Value file(file_v->ToString());

options.file = strdup(*file);

}

// options.args

Local<Value> argv_v = js_options->Get(String::New("args"));

if (!argv_v.IsEmpty() && argv_v->IsArray()) {

Local<Array> js_argv = Local<Array>::Cast(argv_v);

int argc = js_argv->Length();

// Heap allocate to detect errors. +1 is for NULL.

options.args = new char*[argc + 1];

for (int i = 0; i < argc; i++) {

String::Utf8Value arg(js_argv->Get(i)->ToString());

options.args[i] = strdup(*arg);

}

options.args[argc] = NULL;

}

// options.cwd

Local<Value> cwd_v = js_options->Get(String::New("cwd"));

if (!cwd_v.IsEmpty() && cwd_v->IsString()) {

String::Utf8Value cwd(cwd_v->ToString());

if (cwd.length() > 0) {

options.cwd = strdup(*cwd);

}

}

// options.env

Local<Value> env_v = js_options->Get(String::New("envPairs"));

if (!env_v.IsEmpty() && env_v->IsArray()) {

Local<Array> env = Local<Array>::Cast(env_v);

int envc = env->Length();

options.env = new char*[envc + 1]; // Heap allocated to detect errors.

for (int i = 0; i < envc; i++) {

String::Utf8Value pair(env->Get(i)->ToString());

options.env[i] = strdup(*pair);

}

options.env[envc] = NULL;

}

// options.stdin_stream

Local<Value> stdin_stream_v = js_options->Get(String::New("stdinStream"));

if (!stdin_stream_v.IsEmpty() && stdin_stream_v->IsObject()) {

PipeWrap* stdin_wrap = PipeWrap::Unwrap(stdin_stream_v->ToObject());

options.stdin_stream = stdin_wrap->UVHandle();

}

// options.stdout_stream

Local<Value> stdout_stream_v = js_options->Get(String::New("stdoutStream"));

if (!stdout_stream_v.IsEmpty() && stdout_stream_v->IsObject()) {

PipeWrap* stdout_wrap = PipeWrap::Unwrap(stdout_stream_v->ToObject());

options.stdout_stream = stdout_wrap->UVHandle();

}

// options.stderr_stream

Local<Value> stderr_stream_v = js_options->Get(String::New("stderrStream"));

if (!stderr_stream_v.IsEmpty() && stderr_stream_v->IsObject()) {

PipeWrap* stderr_wrap = PipeWrap::Unwrap(stderr_stream_v->ToObject());

options.stderr_stream = stderr_wrap->UVHandle();

}

// options.windows_verbatim_arguments

#if defined(_WIN32)

options.windows_verbatim_arguments = js_options->

Get(String::NewSymbol("windowsVerbatimArguments"))->IsTrue();

#endif

int r = uv_spawn(uv_default_loop(), &wrap->process_, options);

if (r) {

SetErrno(uv_last_error(uv_default_loop()));

}

else {

wrap->SetHandle((uv_handle_t*)&wrap->process_);

assert(wrap->process_.data == wrap);

wrap->object_->Set(String::New("pid"), Integer::New(wrap->process_.pid));

}

if (options.args) {

for (int i = 0; options.args[i]; i++) free(options.args[i]);

delete [] options.args;

}

free(options.cwd);

free((void*)options.file);

if (options.env) {

for (int i = 0; options.env[i]; i++) free(options.env[i]);

delete [] options.env;

}

return scope.Close(Integer::New(r));

}

static Handle<Value> Kill(const Arguments& args) {

HandleScope scope;

UNWRAP

int signal = args[0]->Int32Value();

int r = uv_process_kill(&wrap->process_, signal);

if (r) SetErrno(uv_last_error(uv_default_loop()));

return scope.Close(Integer::New(r));

}

static void OnExit(uv_process_t* handle, int exit_status, int term_signal) {

HandleScope scope;

ProcessWrap* wrap = static_cast<ProcessWrap*>(handle->data);

assert(wrap);

assert(&wrap->process_ == handle);

Local<Value> argv[2] = {

Integer::New(exit_status),

String::New(signo_string(term_signal))

};

MakeCallback(wrap->object_, "onexit", 2, argv);

}

uv_process_t process_;