mirror of
https://we.phorge.it/source/phorge.git
synced 2024-11-23 15:22:41 +01:00
f56f1b05c0
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
111 lines
2.9 KiB
PHP
Executable file
111 lines
2.9 KiB
PHP
Executable file
#!/usr/bin/env php
|
|
<?php
|
|
|
|
// This is a wrapper script for Git, Mercurial, and Subversion. It primarily
|
|
// serves to inject "-o StrictHostKeyChecking=no" into the SSH arguments.
|
|
|
|
// In some cases, Subversion sends us SIGTERM. If we don't catch the signal and
|
|
// react to it, we won't run object destructors by default and thus won't clean
|
|
// up temporary files. Declare ticks so we can install a signal handler.
|
|
declare(ticks=1);
|
|
|
|
$root = dirname(dirname(dirname(__FILE__)));
|
|
require_once $root.'/scripts/__init_script__.php';
|
|
|
|
// Contrary to the documentation, Git may pass a "-p" flag. If it does, respect
|
|
// it and move it before the "--" argument.
|
|
$args = new PhutilArgumentParser($argv);
|
|
$args->parsePartial(
|
|
array(
|
|
array(
|
|
'name' => 'port',
|
|
'short' => 'p',
|
|
'param' => pht('port'),
|
|
'help' => pht('Port number to connect to.'),
|
|
),
|
|
));
|
|
$unconsumed_argv = $args->getUnconsumedArgumentVector();
|
|
|
|
if (function_exists('pcntl_signal')) {
|
|
pcntl_signal(SIGTERM, 'ssh_connect_signal');
|
|
}
|
|
|
|
function ssh_connect_signal($signo) {
|
|
// This is just letting destructors fire. In particular, we want to clean
|
|
// up any temporary files we wrote. See T10547.
|
|
exit(128 + $signo);
|
|
}
|
|
|
|
$pattern = array();
|
|
$arguments = array();
|
|
|
|
$pattern[] = 'ssh';
|
|
|
|
$pattern[] = '-o';
|
|
$pattern[] = 'StrictHostKeyChecking=no';
|
|
|
|
// This prevents "known host" failures, and covers for issues where HOME is set
|
|
// to something unusual.
|
|
$pattern[] = '-o';
|
|
$pattern[] = 'UserKnownHostsFile=/dev/null';
|
|
|
|
$as_device = getenv('PHABRICATOR_AS_DEVICE');
|
|
$credential_phid = getenv('PHABRICATOR_CREDENTIAL');
|
|
|
|
if ($as_device) {
|
|
$device = AlmanacKeys::getLiveDevice();
|
|
if (!$device) {
|
|
throw new Exception(
|
|
pht(
|
|
'Attempting to create an SSH connection that authenticates with '.
|
|
'the current device, but this host is not configured as a cluster '.
|
|
'device.'));
|
|
}
|
|
|
|
if ($credential_phid) {
|
|
throw new Exception(
|
|
pht(
|
|
'Attempting to proxy an SSH connection that authenticates with '.
|
|
'both the current device and a specific credential. These options '.
|
|
'are mutually exclusive.'));
|
|
}
|
|
}
|
|
|
|
if ($credential_phid) {
|
|
$viewer = PhabricatorUser::getOmnipotentUser();
|
|
$key = PassphraseSSHKey::loadFromPHID($credential_phid, $viewer);
|
|
|
|
$pattern[] = '-l %P';
|
|
$arguments[] = $key->getUsernameEnvelope();
|
|
$pattern[] = '-i %P';
|
|
$arguments[] = $key->getKeyfileEnvelope();
|
|
}
|
|
|
|
if ($as_device) {
|
|
$pattern[] = '-l %R';
|
|
$arguments[] = AlmanacKeys::getClusterSSHUser();
|
|
$pattern[] = '-i %R';
|
|
$arguments[] = AlmanacKeys::getKeyPath('device.key');
|
|
}
|
|
|
|
$port = $args->getArg('port');
|
|
if ($port) {
|
|
$pattern[] = '-p %d';
|
|
$arguments[] = $port;
|
|
}
|
|
|
|
$pattern[] = '--';
|
|
|
|
$passthru_args = $unconsumed_argv;
|
|
foreach ($passthru_args as $passthru_arg) {
|
|
$pattern[] = '%s';
|
|
$arguments[] = $passthru_arg;
|
|
}
|
|
|
|
$pattern = implode(' ', $pattern);
|
|
array_unshift($arguments, $pattern);
|
|
|
|
$err = newv('PhutilExecPassthru', $arguments)
|
|
->execute();
|
|
|
|
exit($err);
|