run a windows batch file from node.js

Question

am trying to run a test.bat file inside node.js

here is the code

var exec = require('child_process').execFile;

case '/start':
    req.on('data', function (chunk) {});
    req.on('end', function () {
      console.log("INSIDE--------------------------------:");      
       exec('./uli.bat', function (err, data) {
        console.log(err);
        console.log(data);
        res.end(data);
      });
    });
    break;

while running this node.js file am getting

INSIDE--------------------------------:
{ [Error: Command failed: '.' is not recognized as an internal or ext
nd,
operable program or batch file.
] killed: false, code: 1, signal: null }

It would be better if you posted the full output, instead of an oddly cropped portion :). Also, that ./ path looks very unixy — salezica
– salezica, Commented Mar 27, 2014 at 5:29
Have you tried without the ./ in the path to the .bat file? — fiskeben
– fiskeben, Commented Mar 27, 2014 at 6:26

SoftwareGuy · Accepted Answer · 2014-08-11 23:46:21Z

17

I have found the solution for it.. and its works fine for me. This opens up a new command window and runs my main node JS in child process. You need not give full path of cmd.exe. I was making that mistake.

var spawn = require('child_process').spawn,
ls    = spawn('cmd.exe', ['/c', 'my.bat']);

ls.stdout.on('data', function (data) {
console.log('stdout: ' + data);
});

ls.stderr.on('data', function (data) {
console.log('stderr: ' + data);
});

ls.on('exit', function (code) {
console.log('child process exited with code ' + code);
});

answered Aug 11, 2014 at 23:46

SoftwareGuy

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5 Comments

Sohan Over a year ago

This does not work on window. Spawn works only on linux shell env.

davidmdem Over a year ago

I can confirm that this does, in fact, work in Windows to execute .bat files.

user3526 Over a year ago

Under windows, in case you want to use relative path for the batch file; use template strings like so: spawn('cmd.exe',["/c", `..\\BINARIES\\t1.bat`],{env: process.env});

Sonalk Over a year ago

I get error "Uncaught ReferenceError: require is not defined". Anyone know why and how to fix that?

anirudh talluri Over a year ago

getting error as Uncaught Error: spawn when trying to use this

Bruno SkeptRaiser · Accepted Answer · 2015-11-14 15:51:58Z

5

The easiest way I know for execute that is following code :

require('child_process').exec("path/to/your/file.bat", function (err, stdout, stderr) {
    if (err) {
        // Ooops.
        // console.log(stderr);
        return console.log(err);
    }

    // Done.
    console.log(stdout);
});

You could replace "path/to/your/file.bat" by __dirname + "/file.bat" if your file is in the directory of your current script for example.

edited Nov 14, 2015 at 15:51

answered Nov 13, 2015 at 17:35

Bruno SkeptRaiser

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1 Comment

Andrija Jostergård Over a year ago

No matter how i try to do this, i get the same error:

Error: Command failed: E:/devProj/instager/start.bat ERROR: Input redirection is not supported, exiting the process immediately.      at ChildProcess.exithandler (child_process.js:217:12)     at emitTwo (events.js:106:13)     at ChildProcess.emit (events.js:194:7)     at maybeClose (internal/child_process.js:899:16)     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)   killed: false,   code: 1,   signal: null,   cmd: 'E:/devProj/instager/start.bat'

Clonkex · Accepted Answer · 2020-03-06 03:14:46Z

5

In Windows, I don't prefer spawn as it creates a new cmd.exe and we have to pass the .bat or .cmd file as an argument. exec is a better option. Example below:

Please note that in Windows you need to pass the path with double backslashes. E.g. C:\\path\\batfilename.bat

const { exec } = require('child_process');
exec("path", (err, stdout, stderr) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(stdout);
});

edited Mar 6, 2020 at 3:14

Clonkex

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answered Nov 8, 2017 at 16:14

Pinaki Mukherjee

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Comments

Lucien · Accepted Answer · 2021-04-21 09:46:30Z

4

An easier way I know for executing that is the following code :

function Process() {
    const process = require('child_process');
    var ls = process.spawn('script.bat');
    ls.stdout.on('data', function (data) {
        console.log(data);
    });
    ls.stderr.on('data', function (data) {
        console.log(data);
    });
    ls.on('close', function (code) {
        if (code == 0)
            console.log('Stop');
        else
            console.log('Start');
    });
};

Process();

edited Apr 21, 2021 at 9:46

Lucien

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answered Apr 22, 2018 at 12:17

Professor

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