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ENH: move signal.signal(signal.SIGHUP, signal.SIG_IGN) before fork in server. closes #446

pull/452/head
Daniel Black 2013-11-23 11:33:41 +11:00
parent 28d8aec511
commit f2c529ca7b
1 changed files with 8 additions and 4 deletions
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12
server/server.py
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@ -409,6 +409,14 @@ class Server:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
"""
# When the first child terminates, all processes in the second child
# are sent a SIGHUP, so it's ignored.
# We need to set this in the parent process, so it gets inherited by the
# child process, and this makes sure that it is effect even if the parent
# terminates quickly.
signal.signal(signal.SIGHUP, signal.SIG_IGN)
try:
# Fork a child process so the parent can exit. This will return control
# to the command line or shell. This is required so that the new process
@ -431,10 +439,6 @@ class Server:
# leader.
os.setsid()
# When the first child terminates, all processes in the second child
# are sent a SIGHUP, so it's ignored.
signal.signal(signal.SIGHUP, signal.SIG_IGN)
try:
# Fork a second child to prevent zombies. Since the first child is
# a session leader without a controlling terminal, it's possible for