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phorge-phorge/scripts
epriestley f56f1b05c0 Install a SIGTERM handler in ssh-connect
Summary:
Ref T10547. This has been around for a while but I was never able to reproduce it. I caught a repro case in the cluster recently and I think this is the right fix.

We tell Subversion to run `ssh-connect` instead of `ssh` so we can provide options and credentials, by using `SVN_SSH` in the environment. Subversion will sometimes kill the SSH tunnel subprocess aggressively with SIGTERM -- as of writing, you can search for `SIGTERM` in `make_tunnel()` here:

http://svn.apache.org/repos/asf/subversion/trunk/subversion/libsvn_ra_svn/client.c

By default, when a PHP process gets SIGTERM it just exits immediately, without running destructors or shutdown functions. Since destructors/shutdown functions don't run, `TempFile` doesn't get a chance to remove the file.

I don't have a clear picture of //when// Subversion sends SIGTERM to the child process. I can't really get this to trigger locally via `svn`, although I was able to get it to trigger explicitly. So I'm only about 95% sure this fixes it, but it seems likely.

Test Plan:
Locally, I couldn't get this to reproduce "normally" even knowing the cause (maybe Subversion doesn't do the SIGTERM stuff on OSX?) but I was able to get it to reproduce reliabily by adding `posix_kill(getmypid(), SIGTERM);` to the body of the script.

With that added, running the script with `PHABRICATOR_CREDENTIAL=PHID-CDTL-...` in the environment reliably left straggler temporary files.

Adding `declare()` and a signal handler fixed this: the script now runs the `TempFile` destructor and longer leaves the stragglers around.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10547

Differential Revision: https://secure.phabricator.com/D16102
2016-06-13 10:05:46 -07:00
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almanac Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
cache Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
calendar Change double quotes to single quotes. 2014-06-09 11:36:50 -07:00
celerity Remove defunt project image choices 2016-01-19 08:50:59 -08:00
daemon Lift ticks declaration to top level in Phabricator daemons 2016-06-06 06:39:09 -07:00
diviner Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
drydock Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
fact Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
files Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
fpm Delete license headers from files 2012-11-05 11:16:51 -08:00
install Clean up some old "www.phabricator.com" references 2015-07-07 13:35:57 -07:00
lipsum Improve bin/lipsum UX 2015-12-24 09:06:35 -08:00
mail Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
repository Remove dependence on callsigns from bin/commit-hook 2016-02-17 16:50:36 -08:00
search Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
setup Provide bin/nuance import and ngram indexes for sources 2016-03-08 10:30:24 -08:00
sms Use PhutilClassMapQuery instead of PhutilSymbolLoader 2015-08-14 07:49:01 +10:00
sql Give bin/storage some replica-aware options 2016-04-14 13:23:35 -07:00
ssh Install a SIGTERM handler in ssh-connect 2016-06-13 10:05:46 -07:00
symbols Update import/clear symbols scripts for callsigns 2016-02-18 09:55:57 -08:00
user Add "Mailing List" users 2015-06-03 18:42:33 -07:00
util phtize all the things 2015-05-22 21:16:39 +10:00
__init_script__.php phtize all the things 2015-05-22 21:16:39 +10:00