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#include <node.h>
#include <handle_wrap.h>
#include <pipe_wrap.h>
#include <string.h>
#include <stdlib.h>
#define UNWRAP \
assert(!args.Holder().IsEmpty()); \
assert(args.Holder()->InternalFieldCount() > 0); \
ProcessWrap* wrap = \
static_cast<ProcessWrap*>(args.Holder()->GetPointerFromInternalField(0)); \
if (!wrap) { \
uv_err_t err; \
err.code = UV_EBADF; \
SetErrno(err); \
return scope.Close(Integer::New(-1)); \
}
namespace node {
using v8::Object;
using v8::Handle;
using v8::Local;
using v8::Persistent;
using v8::Value;
using v8::HandleScope;
using v8::FunctionTemplate;
using v8::String;
using v8::Array;
using v8::Function;
using v8::TryCatch;
using v8::Context;
using v8::Arguments;
using v8::Integer;
class ProcessWrap : public HandleWrap {
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);
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;
}
if (r) SetErrno(uv_last_error(uv_default_loop()));
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_;
};
} // namespace node
NODE_MODULE(node_process_wrap, node::ProcessWrap::Initialize);
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