Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!1.eu.feeder.erje.net!feeder2.ecngs.de!ecngs!feeder.ecngs.de!border1.nntp.ams1.giganews.com!nntp.giganews.com!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.019 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'url:pypi': 0.03; 'exit': 0.07; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.11; '8bit%:32': 0.16; 'child.': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'simpson': 0.16; 'subprocess,': 0.16; 'library': 0.20; '(the': 0.22; 'code.': 0.23; "haven't": 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; 'correct': 0.29; 'program,': 0.29; 'url:python': 0.33; 'to:addr:python-list': 0.35; 'url:org': 0.36; 'subject:: ': 0.37; 'aspects': 0.37; 'instead': 0.38; 'received:org': 0.38; 'to:addr:python.org': 0.39; 'easy': 0.60; 'relatively': 0.63; 'cameron': 0.66; 'skip:\xe2 10': 0.70; '_o__)': 0.84; 'cecil': 0.84; 'mencken': 0.84; 'received:125': 0.84; '\xe2\x80\x94henry': 0.84; 'subject:Best': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Ben Finney Subject: Re: Best way to prevent zombie processes Date: Mon, 01 Jun 2015 13:37:25 +1000 References: <87vbf8l9e7.fsf@Equus.decebal.nl> <20150601010301.GA17827@cskk.homeip.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Gmane-NNTP-Posting-Host: jigong.madmonks.org X-Public-Key-ID: 0xAC128405 X-Public-Key-Fingerprint: 517C F14B B2F3 98B0 CB35 4855 B8B2 4C06 AC12 8405 X-Public-Key-URL: http://www.benfinney.id.au/contact/bfinney-pubkey.asc X-Post-From: Ben Finney User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) Cancel-Lock: sha1:YHDbyHHr/DGeyp18SsdIKzRd5DA= X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 17 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1433133429 news.xs4all.nl 2928 [2001:888:2000:d::a6]:48783 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:91614 Cameron Simpson writes: > The standard trick is to make the process a grandchild instead of a > child. Fork, kick off subprocess, exit (the forked child). For Cecil Westerhof's benefit: If you haven't seen it, the ‘python-daemon’ library is designed to get this, and other fiddly aspects of daemonising the current program, correct in Python code. -- \ “Injustice is relatively easy to bear; what stings is justice.” | `\ —Henry L. Mencken | _o__) | Ben Finney