CODEWITHSUNDEEP
pythonsubprocessfork
Gray
Gray

Reputation: 297

What happens to the stdout and stdin for a forked process?

I understand the fork function.I know that it duplicates the parent process and after the fork function has been called the parent complete its execution and the child start its execution. Here is a python code the fork a child process

import os
pid, master_fd =os.forkpty()
if pid == 0:
    print ('child')
else:
   print ('parent')

Why is the word child doesn’t get printed??

Upvotes: 0

Views: 790

Answers (1)

Robᵩ
Robᵩ

Reputation: 168626

The word "child" doesn't appear because os.forkpty() creates a new pseudo-terminal and routes the child's output to it.

Your understanding would be correct if you had used os.fork() instead.

Upvotes: 2

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