从Node.js调用execl，execle，execlp，execv，execvP或execvp的方法 [英] A way to call execl, execle, execlp, execv, execvP or execvp from Node.js

问题描述

POSIX系统公开了exec函数家族，该函数家族允许将可能不同的某些东西加载到当前进程中，并保持打开的文件描述符，进程标识符等.

POSIX systems expose family of exec functions, that allow one to load something maybe different into current process, keeping open file descriptors, process identifier and so on.

可以出于多种原因完成此操作，在我的情况下，这是引导程序-我想更改自己进程的命令行选项，然后在现有进程上重新加载它，因此不会有子进程.

This can be done for variety of reasons, and in my case this is bootstrapping — I want to change command line options of my own process, and then reload it over existing process, so there would be no child process.

不幸的是，令我惊讶的是，我找不到在Node.js中调用任何exec*函数的方法.那么，用其他映像替换当前正在运行的Node.js进程的正确方法是什么?

Unfortunately, to much of my surprise, I could not find the way to call any of exec* functions in Node.js. So, what is the correct way to replace currently running Node.js process with other image?

推荐答案

我创建了一个模块来从NodeJS调用execvp函数: https://github.com/OrKoN/native-exec

I have created a module to invoke execvp function from NodeJS: https://github.com/OrKoN/native-exec

它是这样的:

var exec = require('native-exec');

exec('ls', {
  newEnvKey: newEnvValue,
}, '-lsa'); // => the process is replaced with ls, which runs and exits

由于它是本机节点插件，因此需要安装C ++编译器.在Mac OS和Linux上的Docker中可以正常工作.可能在Windows上不起作用.经过节点6、7和8的测试.

Since it's a native node addon it requires a C++ compiler installed. Works fine in Docker, on Mac OS and Linux. Probably, does not work on Windows. Tested with node 6, 7 and 8.

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