Implement graceful stop in the event MPM. Implementation is identical to
the worker MPM implementation. 



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@264105 13f79535-47bb-0310-9956-ffa450edef68

*how* did I mis-spell that.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@264104 13f79535-47bb-0310-9956-ffa450edef68

Move the "GracefulShutdownTimeout" command definition into mpm_common



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@264103 13f79535-47bb-0310-9956-ffa450edef68

submited by: Neale Ranns neale ranns.org
reviewed by: Ian Holsman



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@263931 13f79535-47bb-0310-9956-ffa450edef68

Add graceful-stop to the list of new features. 



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@263906 13f79535-47bb-0310-9956-ffa450edef68

Update transformations to reflect the graceful-stop XML documentation.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@263901 13f79535-47bb-0310-9956-ffa450edef68

Add a note on the possible pit-falls that lie ahead when running multiple
instances of httpd at the same time.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@263857 13f79535-47bb-0310-9956-ffa450edef68

If it makes it in to 2.2, leave it. Otherwise bump it later.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@263854 13f79535-47bb-0310-9956-ffa450edef68

Update CHANGES to reflect that worker now supports graceful-stop, that Bill
wrote some of the graceful-stop code I stole from Ken, and to get rid of
exraneous `'`'s.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@241820 13f79535-47bb-0310-9956-ffa450edef68

Implement a graceful-stop for the worker MPM. We close our listeners, and then
ask each child process to do the same. We then monitor until all children have
exited.

The change to ap_start_shutdown(void) to ap_start_shutdown(int) may look like
an external API change, but the function is defined static, and used only in
one place.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@241819 13f79535-47bb-0310-9956-ffa450edef68

CGId keeps a copy of the listening sockets open, which interferes with a 
graceful shutdown/start. Close the listening sockets on cgid start.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@241815 13f79535-47bb-0310-9956-ffa450edef68

Re-add a simple, obvious, speed-up.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@241814 13f79535-47bb-0310-9956-ffa450edef68

Remove as many ghastly scoreboard loops from the graceful-shutdown code, and
replace with the new ap_relieve_child_processes() call. Add a sleep() call now,
as we lost the timeout inherent in ap_wait_or_timeout(). 1 second seems a sane
choice.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240466 13f79535-47bb-0310-9956-ffa450edef68

Add ap_relieve_child_processess(), a non-infanticidal copy of
ap_reclaim_child_processes(). Allows us to waitpid() each process in the
scoreboard and each "extra" process with a single call.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240465 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240426 13f79535-47bb-0310-9956-ffa450edef68

longer removed. Added httxt2dbm to the sbin directory.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240349 13f79535-47bb-0310-9956-ffa450edef68

update transformations.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240306 13f79535-47bb-0310-9956-ffa450edef68

Make the reference to the 1.3 FAQ a little more up-to-date; and
add a FAQ on SELinux.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240301 13f79535-47bb-0310-9956-ffa450edef68

PR: 36166


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240299 13f79535-47bb-0310-9956-ffa450edef68

Allow htcacheclean to deal in gigabytes.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240297 13f79535-47bb-0310-9956-ffa450edef68

Move the "GracefulShutdownTimeout" directive into mpm_common, for re-use
with other MPM's.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240296 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240281 13f79535-47bb-0310-9956-ffa450edef68

Update the transformations to reflect the new graceful-stop argument.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240275 13f79535-47bb-0310-9956-ffa450edef68

Silly me, I forgot to commit this; the definitions for the GRACEFUL_STOP
signal.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240274 13f79535-47bb-0310-9956-ffa450edef68

Allow apachectl to support "graceful-stop" argument



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240273 13f79535-47bb-0310-9956-ffa450edef68

Documentation changes relevant to new graceful-stop command line argument
for httpd and apachectl, and the the "GracefulShutdownTimeout" directive.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240271 13f79535-47bb-0310-9956-ffa450edef68

Implement a "graceful-stop" for the prefork MPM (might aswell do the hard one
first). 

General approach is to send SIGUSR1 to all children (which will de-listen, and
exit when finished), and to gather all children as they exit. 

We don't use a sleep(timeout) for the timeout implementation, because this
would lead to a rut of defunct children until the timeout had expired.

set_graceful_shutdown stolen from Ken Coar. See <3E84B1EC.3050007@Golux.Com>
(28 Mar 2003).



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240270 13f79535-47bb-0310-9956-ffa450edef68

Make the neccessary changes to mpm_common and main to support a graceful-stop
command line argument. 



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240269 13f79535-47bb-0310-9956-ffa450edef68

Remove the note about WINCH on certain platforms. As of r239430, this is no
longer the case and USR1 will be used on all platforms.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240258 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240101 13f79535-47bb-0310-9956-ffa450edef68

for the same port, switch them so that the bind to [::] is attempted
first.

Submitted by: colm, jorton


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240096 13f79535-47bb-0310-9956-ffa450edef68

(open_listeners): Simplify using the new macros; no functional change.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240092 13f79535-47bb-0310-9956-ffa450edef68

A very minor, but particularly annoying whitespace fix. It took me 15 minutes
to try and parse what was going on :-)



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240089 13f79535-47bb-0310-9956-ffa450edef68

Update the documentation for the ScriptSock directive to match the
.PID extension.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240049 13f79535-47bb-0310-9956-ffa450edef68

Append the .PID to the ScriptSock filename. This change ensures that multiple
running instances of httpd will not clobber each others script sockets. 

Because a different socket will be created for each instance, this change also
unlinks the script-socket on exit, to prevent pollution. 

unlink() happens from within the parent process, since the change in userid's
means the cgid process likely won't have the correct permissions.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240044 13f79535-47bb-0310-9956-ffa450edef68

nit: Consistently CamelCase "ScriptSock".



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240043 13f79535-47bb-0310-9956-ffa450edef68

Implement "de-listening" in the worker MPM. Fixes PR28167.  Comments in CHANGES
file also cover r239710-1. 



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@239740 13f79535-47bb-0310-9956-ffa450edef68

Correct the function prototype/declaration 



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@239732 13f79535-47bb-0310-9956-ffa450edef68

Implement "de-listening" for graceful restarts with the prefork MPM. With this
change;

  1.) httpd -k graceful sends SIGUSR1 to the parent pid, which in turn
      sends SIGUSR1 to all of the active children,

  2.) Active children each close their copy of listener fd's.

This means that the listening sockets are freed for re-use. In the ordinary
case, this makes no difference. However if for example admin changes "Listen
80" to "Listen 81" in the config, this rev makes port 80 immediately available
(no waiting for the graceful children to die).



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@239711 13f79535-47bb-0310-9956-ffa450edef68

Provide a function for closing all of the listeners. 

  * This is useful for properly implementing a graceful stop and restart
    where we want child processess to be able to carry on serving a request 
    but "de-listen" from a port. So that another instance entirely can be 
    started in our place, or to unbind from a "Listen" directive an admin 
    has removed from the configuration.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@239710 13f79535-47bb-0310-9956-ffa450edef68