OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.
os.wait() method in Python is used by a process to wait for completion of a child process.
This method returns a tuple containing its PID and exit status indication. The exit status of child process is indicated by a 16 bit number whose lower byte is the signal number that killed the process and higher byte is the exit status (if the signal number is zero).
Syntax: os.wait()
Parameter: No parameter is required.
Return type: This method returns a tuple which contains terminated child’s PID and exit status indication.
Code: Use of os.wait() method
# Python program to explain os.wait() method # importing os module import os # Create a child process # using os.fork() method pid = os.fork() # a Non-zero process id (pid) # indicates the parent process if pid : # Wait for the completion of # child process using # os.wait() method status = os.wait() print("\nIn parent process-") print("Terminated child's process id:", status[0]) print("Signal number that killed the child process:", status[1]) else : print("In Child process-") print("Process ID:", os.getpid()) print("Hello ! Geeks") print("Exiting") # using os.wait() method # Parent process will wait till # the completion of child process # and then only it will # begin its execution |
In Child process- Process ID: 6276 Hello! Geeks Exiting In parent process- Terminated child's process id: 6276 Signal number that killed the child process: 0
