15.2 error
Hello everyone for lab 15.2
We are asked to do this:
for the child process stdio
● has no ability to read STDIN
● redirects its STDERR to the parent process' STDERR
● exposes STDOUT as a readable stream
to do this we I would think that we would use the stdio property
on the options object. and the stdio property might look like this.
stdio: [ 'ignore', 'pipe', 'inherit']
● has no ability to read STDIN
Answer: set the stdin to 'ignore'
● edirects its STDERR to the parent process' STDERR
Answer: set the stderr to 'inherit'
● exposes STDOUT as a readable stream
Answer: set the stdout to 'pipe'
This seems to match what the lab is asking me to do.
Although when I run the test it has the stderr and stdout swapped.
Like it actually want the child process stdout to inherit from the parent process
and vice versa for stderr.
so I switch the two and I get a pass on the test.
Although I got the test to pass I think that either I am missing something or there is some inconsistency between the test and the instructions for the lab.
my test passing solution in its entirety is below although I think that this solution doesn't match the lab's promt.
'use strict' const { spawn } = require('child_process') function exercise (command, args) { return spawn(command, args, { stdio: [ 'ignore', 'inherit', 'pipe'] }) }
I have experimented with the code by logging out things from the child process using both the stderr and the stdout.
And I have read the options.stdio documentation in the child_process docs from node.js
Can someone please tell me what I am missing?
Answers
-
You're not missing anything you're absolutely right STDERR and STDOUT are the wrong way round. The instructions are being updated to:
- has no ability to read STDIN
- redirects its STDOUT to the parent process' STDOUT
- exposes STDERR as a readable stream
thanks so much for pointing this out
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