node/src/node_child_process.h at master · tmpvar/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef NODE_CHILD_PROCESS_H_

#define NODE_CHILD_PROCESS_H_

#include <node.h>

#include <node_object_wrap.h>

#include <v8.h>

#include <uv.h>

#ifdef __POSIX__

# include <uv-private/ev.h>

#endif

#ifdef __MINGW32__

# include <platform_win32.h> // HANDLE type

#endif

// ChildProcess is a thin wrapper around ev_child. It has the extra

// functionality that it can spawn a child process with pipes connected to

// its stdin, stdout, stderr. This class is not meant to be exposed to but

// wrapped up in a more friendly EventEmitter with streams for each of the

// pipes.

// When the child process exits (when the parent receives SIGCHLD) the

// callback child.onexit will be called.

namespace node {

class ChildProcess : ObjectWrap {

public:

static void Initialize(v8::Handle<v8::Object> target);

protected:

static v8::Handle<v8::Value> New(const v8::Arguments& args);

static v8::Handle<v8::Value> Spawn(const v8::Arguments& args);

static v8::Handle<v8::Value> Kill(const v8::Arguments& args);

ChildProcess() : ObjectWrap() {

#ifdef __POSIX__

ev_init(&child_watcher_, ChildProcess::on_chld);

child_watcher_.data = this;

#endif // __POSIX__

pid_ = -1;

#ifdef __MINGW32__

InitializeCriticalSection(&info_lock_);

kill_me_ = false;

did_start_ = false;

exit_signal_ = 0;

#endif // __MINGW32__

}

~ChildProcess() {

#ifdef __POSIX__

Stop();

#endif // __POSIX__

}

// Returns 0 on success. stdio_fds will contain file desciptors for stdin,

// stdout, and stderr of the subprocess. stdin is writable; the other two

// are readable.

// The user of this class has responsibility to close these pipes after

// the child process exits.

int Spawn(const char *file,

char *const argv[],

const char *cwd,

char **env,

int stdio_fds[3],

int custom_fds[3],

bool do_setsid,

int custom_uid,

char *custom_uname,

int custom_gid,

char *custom_gname,

int* channel);

// Simple syscall wrapper. Does not disable the watcher. onexit will be

// called still.

int Kill(int sig);

private:

void OnExit(int code);

#ifdef __POSIX__ // Shouldn't this just move to node_child_process.cc?

void Stop(void);

static void on_chld(EV_P_ ev_child *watcher, int revents) {

ChildProcess *child = static_cast<ChildProcess*>(watcher->data);

assert(revents == EV_CHILD);

assert(child->pid_ == watcher->rpid);

assert(&child->child_watcher_ == watcher);

child->OnExit(watcher->rstatus);

}

ev_child child_watcher_;

pid_t pid_;

#endif // __POSIX__

#ifdef __MINGW32__

static void watch(ChildProcess *child);

static void CALLBACK watch_wait_callback(void *data, BOOLEAN didTimeout);

static void notify_spawn_failure(ChildProcess *child);

static void notify_exit(uv_async_t* watcher, int status);

static int do_kill(ChildProcess *child, int sig);static void close_stdio_handles(ChildProcess *child);

int pid_;

int exit_signal_;

WCHAR *application_;

WCHAR *arguments_;

WCHAR *env_win_;

WCHAR *cwd_;

const WCHAR *path_;

const WCHAR *path_ext_;

HANDLE stdio_handles_[3];

bool got_custom_fds_[3];

CRITICAL_SECTION info_lock_;

bool did_start_;

bool kill_me_;

HANDLE wait_handle_;

HANDLE process_handle_;

#endif // __MINGW32__

};

} // namespace node

#endif // NODE_CHILD_PROCESS_H_

node/src/node_child_process.h at master · tmpvar/node · GitHub

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