[MacPorts] #54193: squid3+launchd causes multiple runaway processes when run in daemon mode

[MacPorts]

#54193: squid3+launchd causes multiple runaway processes when run in daemon mode
------------------------+----------------------
  Reporter:  essandess  |      Owner:  jmroot
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:             |   Keywords:
      Port:  squid3     |
------------------------+----------------------

Comment (by essandess):

 Re: https://github.com/essandess/macOS-
 Fortress/issues/5#issuecomment-300650444 [`Squid.wrapper` with a `-N`
 flag.]

 I’ve made a few changes that I believe mitigate the problem of squid
 running multiple processes at boot, but do not address the underlying
 issue.

 * Changed {{{squid.conf}}}’s {{{shutdown_lifetime 5 seconds}}} to be much
 less than {{{daemondo}}}’s 20 second timeout to avoid {{{daemondo}}}
 launching multiple redundant squid processes at boot or on a network
 change. See
 https://trac.macports.org/browser/branches/release_2_3/base/src/programs/daemondo/main.c:

 > `const CFTimeInterval kChildDeathTimeout = 20.0;`

 * Use a robust script [https://github.com/essandess/macOS-
 Fortress/blob/master/macosfortress_boot_check] to run by hand at boot time
 that checks (1) if squid has bound port 3128 and (2) that there is only a
 single squid process. If not, it kills all running squid and relaunches a
 controlled squid daemon. 🦑

 {{{
 # commands
 SUDO=/usr/bin/sudo
 PORT=/opt/local/bin/port
 TAIL=/usr/bin/tail
 LSOF=/usr/sbin/lsof
 KILLALL=/usr/bin/killall

 # squid
 # make sure there aren't multiple squid jobs running
 if ! [[ `$SUDO $LSOF -i ':3128' | $TAIL -1` && `ps -ef | grep
 "/opt/local/sbin/squid -s" | grep -v grep | wc -l` -eq 1 ]]; then
     $SUDO $PORT unload squid3
     $SUDO $KILLALL 'squid'
     $SUDO $KILLALL '(squid-1)'
     $SUDO $PORT load squid3
 fi
 }}}

 * Deprecated the modified `Squid.wrapper` file and use the default
 Macports daemondo settings.

 This has helped on the boxes I run, but doesn’t address the underlying
 issue of `daemondo` launching multiple squid processes at boot or on a
 network change.

--
Ticket URL: <https://trac.macports.org/ticket/54193#comment:16>
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