对python中的os.getpid()和os.fork()函数详解

import os
import sys
import time
 
processNmae = 'parent'
 
print "Program executing ntpid:%d,processNmae:%s"%(os.gitpid(),processNmae)
 
#attempt to fork child process
try:
  forkPid = os.fork()
except OSError:
  sys.exit("Unable to create new process.")
 
# Am I parent process?
if forkPid != 0:
  print "Parent executingn"+"tpid:%d,forkPid:%d,processNmae:%s"%(os.getpid(), forkPID,processName)
 
# Am I child process?
elif forkPID == 0:
    processName = "child"
    print "Child executingn" + "tpid: %d, forkPID: %d, processName: %s" % (os.getpid(), forkPID,processName)<br>
print "Process finishingntpid: %d, processName: %s" % (os.getpid(), processName)

import os 
pid=os.fork() #fork反复拷贝 
if pid==0: 
  print("A",os.getpid(),os.getppid()) 
else: 
  print("B",os.getpid(),os.getppid()) 
 
# os.getpid()获取当前进程id   os.getppid()获取父进程id