Python中的OS模块提供了与操作系统进行交互的函数。操作系统属于Python的标准实用程序模块。该模块提供了使用依赖于操作系统的函数的便携式方法。
os.WCOREDUMP()
Python中的方法用于检查是否为该进程生成了核心转储。此方法采用流程状态代码,由os.wait()
,os.system()
或者os.waitpid()
方法作为参数。
用法: os.WCOREDUMP(status)
参数:
status:此参数采用os.system(),os.wait()方法或os.waitpid()方法返回的过程状态代码(整数值)。
返回类型:此方法返回“布尔”类的布尔值。如果为该进程生成了核心转储,则返回True,否则返回False。
代码1:用于os.WCOREDUMP()
方法
# Python program to explain os.WCOREDUMP() 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 :
# Wait for the completion of
# the child process and get
# child's pid and
# exit status indication
info = os.wait()
# info is a tuple
# info[0] represents child's id
# info[1] represents exit status code
print("\nIn parent process")
# Check if core dump was
# generated for the child process
core_dump = os.WCOREDUMP(info[1])
print("Was core dump generated?", core_dump)
else :
print("In Child process")
print("Process ID:", os.getpid())
print("Hello ! Geeks")
# os.abort() method will
# generate a SIGABRT signal
# to the current process
# and will produce core dump.
os.abort()
输出:
In Child process Process ID: 15059 Hello! Geeks In parent process Was core dump generated? True
代码2:用于os.WCOREDUMP()
方法
# Python program to explain os.WCOREDUMP() 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 :
# Wait for the completion of
# first child process and get
# its pid and
# exit status indication
# using os.waitpid() method
child1_info = os.waitpid(pid, 0)
# Wait for the completion of
# second child process and get
# its pid and exit status indication
# using os.waitpid() method
child2_info = os.waitpid(pid2, 0)
# child_info is a tuple, where
# child_info[0] represents child's id
# child_info[1] represents exit status code
print("\nIn parent process")
# Check if core dump was
# generated for the
# first child process
core_dump = os.WCOREDUMP(child1_info[1])
print("Was core dump generated for first child process?")
print(core_dump)
# Check if core dump was
# generated for the
# first child process
core_dump = os.WCOREDUMP(child2_info[1])
print("\nWas core dump generated for second child process?")
print(core_dump)
else :
print("\nIn second child process")
print("Process id:", os.getpid())
print("Hey ! there")
print("Exiting")
else :
print("In Child process")
print("Process ID:", os.getpid())
print("Hello ! Geeks")
# os.abort() method will
# generate a SIGABRT signal
# to the current process
# and will produce core dump.
os.abort()
输出:
In first child process Process ID: 16289 Hello! Geeks In second child process Process id: 16290 Hey! there Exiting In parent process Was core dump generated for first child process? True Was core dump generated for second child process? False
参考文献: https://docs.python.org/3/library/os.html#os.WCOREDUMP
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