nohup 可以使程序后台运行不受终端影响,但想使程序运行后就脱离终端Python需要用到os.fork来实现,例子如下:
daemonize.py
-
-
-
- import sys
- import os
-
- def daemonize(stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):
- try:
- pid = os.fork()
- if pid > 0:
- sys.exit(0)
- except OSError, e:
- sys.stderr.write("fork #1 failed: (%d) %s\n" % (e.errorno, e.strerror))
- sys.exit(1)
-
- os.chdir('/')
- os.umask(0)
- os.setsid()
-
- try:
- pid = os.fork()
- if pid > 0:
- sys.exit(0)
- except OSError, e:
- sys.stderr.write("fork #2 failed: (%d) %s\n" % (e.errorno, e.strerror))
- sys.exit(1)
-
- for f in sys.stdout, sys.stderr:
- f.flush()
-
- si = file(stdin, 'r')
- so = file(stdout, 'a+')
- se = file(stderr, 'a+', 0)
- os.dup2(si.fileno(), sys.stdin.fileno())
- os.dup2(so.fileno(), sys.stdout.fileno())
- os.dup2(se.fileno(), sys.stderr.fileno())
然后我们来调用daemonize接口,使脚本后台运行:
test.py
-
-
-
- from daemonize import daemonize
- import sys
- import time
-
- def test():
- while True:
- sys.stdout.write("Hello!")
- time.sleep(1)
-
- if __name__ == "__main__":
- daemonize(stdout='/home/wisp/test_print.log', stderr='/home/wisp/test_print.log')
- test()
运行test.py后,test.py就会后台运行!~~
本文转自运维笔记博客51CTO博客,原文链接http://blog.51cto.com/lihuipeng/1047085如需转载请自行联系原作者
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