正如NSD所问,这实际上取决于它是如何产生的.例如,如果您使用的是shell脚本,则可以使用该nohup命令来运行子进程.
如果你正在使用fork/exec,那么它有点复杂,但没有太多.
来自http://code.activestate.com/recipes/66012/
import sys, os
def main():
""" A demo daemon main routine, write a datestamp to
/tmp/daemon-log every 10 seconds.
"""
import time
f = open("/tmp/daemon-log", "w")
while 1:
f.write('%s\n' % time.ctime(time.time()))
f.flush()
time.sleep(10)
if __name__ == "__main__":
# do the UNIX double-fork magic, see Stevens' "Advanced
# Programming in the UNIX Environment" for details (ISBN 0201563177)
try:
pid = os.fork()
if pid > 0:
# exit first parent
sys.exit(0)
except OSError, e:
print >>sys.stderr, "fork #1 failed: %d (%s)" % (e.errno, e.strerror)
sys.exit(1)
# decouple from parent environment
os.chdir("/")
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# exit from second parent, print eventual PID before
print "Daemon PID %d" % pid
sys.exit(0)
except OSError, e:
print >>sys.stderr, "fork #2 failed: %d (%s)" % (e.errno, e.strerror)
sys.exit(1)
# start the daemon main loop
main()
Run Code Online (Sandbox Code Playgroud)
这是有史以来最好的书之一.它非常详细地介绍了这些主题.
UNIX环境下的高级编程,第二版(Addison-Wesley专业计算系列)(平装)
ISBN-10:0321525949
ISBN-13:978-0321525949
5星亚马逊评论(我给它6).
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