Like Ruby 'exec' but for Node.js?

Question

I'm looking for a command like Ruby's kernel 'exec' but for Node.js. Any thoughts?

Yes, I want to replace the running process with the child process in and identical manner to Ruby's 'exec'. — JP Richardson
– JP Richardson, Commented Dec 2, 2011 at 20:30
For those of us familiar with Node but not Ruby, perhaps you could explain why Node's child_process.exec is not satisfactory. — Matt Ball
– Matt Ball, Commented Dec 2, 2011 at 20:30
@MДΓΓБДLL I want to replace the running process with the child process. Write a quick ruby script to test this behavior, put only the following line: exec('node'). You'll notice that the ruby interpreter is now the node interpreter. — JP Richardson
– JP Richardson, Commented Dec 2, 2011 at 20:33

Community · Accepted Answer · 2017-05-23 11:52:28Z

7

I took the advice of @phs and built a native Node.js module. A bit of details can be found here. Github source here.

You can use it like so:

npm install kexec

var kexec = require('kexec'); kexec("your_process with args here");

edited May 23, 2017 at 11:52

CommunityBot

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answered Dec 5, 2011 at 15:21

JP Richardson

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1 Comment

ELLIOTTCABLE Over a year ago

Trying to decide if I can afford the time to patch this for Windows support. (It's clearly possible, both Ruby's exec() and Python's execv() are cross-platform.)

phs · Accepted Answer · 2011-12-02 20:48:14Z

5

If you only care about posix platforms you could craft a small module in C and drop down to exec.

For some pointers on how you might do that, first realize that node is a framework that runs on top of v8, and then take a look at this or perhaps this.

edited Dec 2, 2011 at 20:48

answered Dec 2, 2011 at 20:39

phs

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3 Comments

JP Richardson Over a year ago

Awesome. Any tutorials on how I can do this?

phs Over a year ago

@JPRichardson You're looking at getting dirty with v8 extensions. I've updated the answer with a few links to get started.

JP Richardson Over a year ago

Thanks, I gave you an upvote as I didn't think of this as an option previously.

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