node run shell command
// You can use 'exec' this way
const { exec } = require("child_process");
exec("ls -la", (error, stdout, stderr) => {
if (error) {
console.log(`error: ${error.message}`);
return;
}
if (stderr) {
console.log(`stderr: ${stderr}`);
return;
}
console.log(`stdout: ${stdout}`);
});node exec
// Async
const { exec } = require("child_process"); // import { exec } from "child_process"
exec("ls -la", (error, stdout, stderr) => {
if (error) {
console.log(`error: ${error.message}`);
return;
}
if (stderr) {
console.log(`stderr: ${stderr}`);
return;
}
console.log(`stdout: ${stdout}`);
});
// Sync
const { execSync } = require("child_process"); // import { execSync } from "child_process"
const result = execSync("ls -la")
console.log(result.toString())node spawn
const { spawn } = require('child_process');
const ls = spawn('ls', ['-lh', '/usr']);
ls.stdout.on('data', (data) => {
console.log(`stdout: ${data}`);
});
ls.stderr.on('data', (data) => {
console.error(`stderr: ${data}`);
});
ls.on('close', (code) => {
console.log(`child process exited with code ${code}`);
});how to return when child process is complete in node js
var child = require('child_process').exec('python celulas.py')
child.stdout.pipe(process.stdout)
child.on('exit', function() {
process.exit()
})child process
// OR...
const { exec, spawn } = require('child_process');
exec('my.bat', (err, stdout, stderr) => {
if (err) {
console.error(err);
return;
}
console.log(stdout);
});
// Script with spaces in the filename:
const bat = spawn('"my script.cmd"', ['a', 'b'], { shell: true });
// or:
exec('"my script.cmd" a b', (err, stdout, stderr) => {
// ...
});how to return when child process is complete in node js
var execSync = require('exec-sync');
var user = execSync('python celulas.py');Copyright © 2021 Codeinu
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