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.WEXITSTATUS()
method in Python is used to get the integer parameter used by a process in exit(2) system call if os.WIFEXITED(status)
is True. If os.WIFEXITED(status)
is False then the method returns a meaningless value.
Syntax: os.WEXITSTATUS(status)
Parameter:
status: This parameter takes process status code (an integer value) as returned by os.system(), os.wait() or os.waitpid() method.Return type: This method returns an integer value used by a process in exit(2) system call.
Code: Use of os.WEXITSTATUS()
method
# Python program to explain os.WEXITSTATUS() 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 : # Create one more child pid2 = os.fork() if pid2 : print ( "\nIn parent process" ) # Wait for the completion # of first child process and # get its pid and # exit status indication using # os.waitpid() method info1 = os.waitpid(pid, 0 ) # Wait for the completion # of second child process and # get its pid and # exit status indication using # os.waitpid() method info2 = os.waitpid(pid2, 0 ) # os.waitpid() method returns a tuple # first attribute represents child's pid # while second one represents # exit status indication # Get the integer parameter # used first child process # in exit(2) system call # firstly check if # os.WIFEXITED() is True or not if os.WIFEXITED(info1[ 1 ]) : code = os.WEXITSTATUS(info1[ 1 ]) print ( "First child's exit code:" , code) else : print ( "First child does not exited using exit(2) system call." ) # Get the integer parameter # used second child process # in exit(2) system call # firstly check if # os.WIFEXITED() is True or not if os.WIFEXITED(info2[ 1 ]) : code = os.WEXITSTATUS(info2[ 1 ]) print ( "\nSecond child's exit code:" , code) else : print ( "\nSecond child does not exited using exit(2) system call." ) else : print ( "\nIn second child process" ) print ( "Process ID:" , os.getpid()) print ( "Hey ! there" ) print ( "Second child aborted" ) # os.abort() method will # generate a SIGABRT signal # to the current process. os.abort() else : print ( "In first child process" ) print ( "Process ID:" , os.getpid()) print ( "Hello ! Geeks" ) print ( "First child exiting.." ) # Exit with status code 5 # using os._exit() method os._exit( 5 ) |
In first child process Process ID: 11614 Hello! Geeks First child exiting.. In second child process Process ID: 11615 Hey! there Second child aborted In parent process First child's exit code: 5 Second child does not exited using exit(2) system call.
References: https://docs.python.org/3/library/os.html#os.WEXITSTATUS
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