I'm running a Node.js script that creates a child process using the spawn function from the child_process module. The child process runs the zsh shell and prompts the user to enter a name using the read command. However, I can't see the prompt message in the output of the child process.
Here's my code:
const { spawn } = require('child_process'); let child; async function executeCommandOrSendInput(commandOrInput) { if (!child || child.exitCode !== null) { console.log('Creating new child process'); child = spawn('zsh', [], { stdio: 'pipe' }); child.stdout.on('data', (data) => { console.log(`Output: ${data}`); }); child.stderr.on('data', (data) => { console.error(`Error: ${data}`); }); child.on('close', (code) => { console.log(`Child process exited with code ${code}`); }); } console.log('Sending command or input:', commandOrInput); child.stdin.write(commandOrInput + '\n'); } (async () => { try { await executeCommandOrSendInput('read "name?name?" ;echo $name > /tmp/thename.txt; echo done'); await new Promise(resolve => setTimeout(resolve, 1000)); // Wait for 1 second await executeCommandOrSendInput('my_name'); await new Promise(resolve => setTimeout(resolve, 1000)); // Wait for 1 second child.stdin.end(); // End the child process } catch (error) { console.error('An error occurred:', error); } })(); The output is
Creating new child process Sending command or input: read "name?name?" ;echo $name > /tmp/thename.txt; echo done Sending command or input: my_name Output: done Child process exited with code 0 I am using a strange zsh version of read which apparently puts the message before the ?.
When I run the script, I expect to see the name? prompt message in the output of the child process, but it's not there. How can I see the full output of the commands. When I run in zsh, I see:
% read "name?name?" ;echo $name > /tmp/thename.txt; echo done name?my_name done The file I'm creating in the tmp directory does have the correct output
