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._exit()
method in Python is used to exit the process with specified status without without calling cleanup handlers, flushing stdio buffers, etc.
Note: This method is normally used in child process after os.fork() system call. The standard way to exit the process is sys.exit(n)
method.
Syntax: os._exit(status)
Parameter:
status: An integer value or above defined values representing the exit status.
Return type: This method does not return any value in the calling process.
Code: Use of os._exit()
method
# Python program to explain os._exit() method # importing os module import os # Create a child process # using os.fork() method pid = os.fork() # pid greater than 0 # indicates the parent process if pid > 0 : print ( "\nIn parent process" ) # Wait for the completion # of child process and # get its pid and # exit status indication using # os.wait() method info = os.waitpid(pid, 0 ) # os.waitpid() method returns a tuple # first attribute represents child's pid # while second one represents # exit status indication # Get the Exit code # used by the child process # in os._exit() method # firstly check if # os.WIFEXITED() is True or not if os.WIFEXITED(info[ 1 ]) : code = os.WEXITSTATUS(info[ 1 ]) print ( "Child's exit code:" , code) else : print ( "In child process" ) print ( "Process ID:" , os.getpid()) print ( "Hello ! Geeks" ) print ( "Child exiting.." ) # Exit with status os.EX_OK # using os._exit() method # The value of os.EX_OK is 0 os._exit(os.EX_OK) |
In child process Process ID: 15240 Hello! Geeks Child exiting.. In parent process Child's exit code: 0
References: https://docs.python.org/3/library/os.html#os._exit
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