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
#!/usr/bin/python #coding:utf-8 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
#!/usr/bin/python #coding:utf-8 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!~~