Python スクリプトをバックグラウンドで実行するいくつかの方法

python test1.py &

#!/usr/bin/env python
import time,platform
import os
def funzioneDemo():
    # 这是具体业务函数示例
    fout = open('/tmp/demone.log', 'w')
    while True:
        fout.write(time.ctime()+'\n')
        fout.flush()
        time.sleep(2)
    fout.close()
def createDaemon():
    # fork进程        
    try:
        if os.fork() > 0: os._exit(0)
    except OSError, error:
        print 'fork #1 failed: %d (%s)' % (error.errno, error.strerror)
        os._exit(1)    
    os.chdir('/')
    os.setsid()
    os.umask(0)
    try:
        pid = os.fork()
        if pid > 0:
            print 'Daemon PID %d' % pid
            os._exit(0)
    except OSError, error:
        print 'fork #2 failed: %d (%s)' % (error.errno, error.strerror)
        os._exit(1)
    # 重定向标准IO
    sys.stdout.flush()
    sys.stderr.flush()
    si = file("/dev/null", 'r')
    so = file("/dev/null", 'a+')
    se = file("/dev/null", 'a+', 0)
    os.dup2(si.fileno(), sys.stdin.fileno())
    os.dup2(so.fileno(), sys.stdout.fileno())
    os.dup2(se.fileno(), sys.stderr.fileno())
    # 在子进程中执行代码
    funzioneDemo() # function demo
if name == 'main': 
    if platform.system() == "Linux":
        createDaemon()
    else:
        os._exit(0)

[root@local t27]
# cat test123.py
#!/usr/bin/env python
import os,time
while True :    
print time.time()    
time.sleep(1)

[root@local t27]
# cat /etc/init/mikeTest.confdescription "My test"author "Mike_Zhang@live.com"
start on runlevel [234]stop on runlevel [0156]
chdir /test/t27exec /test/t27/test123.pyrespawn

initctl reload-configuration

[root@local t27]# start mikeTest
mikeTest start/running, process 6635
[root@local t27]# ps aux | grep test123.py
root      6635  0.0  0.0  22448  3716 ?        
Ss   09:55   0:00 python /test/t27/test123.py
root      6677  0.0  0.0 103212   752 pts/1   
 S+   09:56   0:00 grep test123.py

[root@local t27]# stop mikeTest
mikeTest stop/waiting
[root@local t27]# ps aux | grep test123.py
root      6696  0.0  0.0 103212   752 pts/1    S+   09:56   0:00 grep test123.py
[root@local t27]#

[root@local test]# cat test123.py#!/usr/bin/env python
import os,time
while True :    print time.time()    time.sleep(1)

[root@local test]# cat start.sh#! /bin/sh
python test123.py &

[root@local test]#./start.sh

python test123.py &