https://github.com/nodejs/node/issues/7439
The above page shows that fs.readFileSync(process.stdin.fd) does not work correctly.
Is fs.readFileSync(fs.openSync('/dev/stdin', 'rs')) the correct way to read from stdin? But it seems that it only works in certain cases, but not all case.
I am wondering what is the correct way to read from stdin in nodejs.
You can use readline
https://nodejs.org/api/readline.html
from those docs:
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
and to read lines:
for await (const line of rl) {
// Each line in input.txt will be successively available here as `line`.
console.log(`Line from file: ${line}`);
}
The process global has a stdin interface. This will log a line after a user enters text and presses Enter on the keyboard.
let buffer = ''
process.stdin.resume()
process.stdin.on('data', (d) => buffer = buffer.concat(d.toString()))
setTimeout(() => {
// Exit after 5 seconds and print entered content
console.log(buffer.toString('utf8'))
process.exit(0)
}, 5000)
Docs - https://nodejs.org/api/process.html#process_process_stdin
