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__init_script__.php
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Sat, Jun 1, 16:52

__init_script__.php
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<?php
function __phutil_init_script__() {
// Adjust the runtime language configuration to be reasonable and inline with
// expectations. We do this first, then load libraries.
// There may be some kind of auto-prepend script configured which starts an
// output buffer. Discard any such output buffers so messages can be sent to
// stdout (if a user wants to capture output from a script, there are a large
// number of ways they can accomplish it legitimately; historically, we ran
// into this on only one install which had some bizarre configuration, but it
// was difficult to diagnose because the symptom is "no messages of any
// kind").
while (ob_get_level() > 0) {
ob_end_clean();
}
error_reporting(E_ALL | E_STRICT);
$config_map = array(
// Always display script errors. Without this, they may not appear, which is
// unhelpful when users encounter a problem. On the web this is a security
// concern because you don't want to expose errors to clients, but in a
// script context we always want to show errors.
'display_errors' => true,
// Send script error messages to the server's error_log setting.
'log_errors' => true,
// Set the error log to the default, so errors go to stderr. Without this
// errors may end up in some log, and users may not know where the log is
// or check it.
'error_log' => null,
// XDebug raises a fatal error if the call stack gets too deep, but the
// default setting is 100, which we may exceed legitimately with module
// includes (and in other cases, like recursive filesystem operations
// applied to 100+ levels of directory nesting). Stop it from triggering:
// we explicitly limit recursive algorithms which should be limited.
// After Feb 2014, XDebug inteprets a value of 0 to mean "do not allow any
// function calls". Previously, 0 effectively disabled this check. For
// context, see T5027.
'xdebug.max_nesting_level' => PHP_INT_MAX,
// Don't limit memory, doing so just generally just prevents us from
// processing large inputs without many tangible benefits.
'memory_limit' => -1,
);
foreach ($config_map as $config_key => $config_value) {
ini_set($config_key, $config_value);
}
if (!ini_get('date.timezone')) {
// If the timezone isn't set, PHP issues a warning whenever you try to parse
// a date (like those from Git or Mercurial logs), even if the date contains
// timezone information (like "PST" or "-0700") which makes the
// environmental timezone setting is completely irrelevant. We never rely on
// the system timezone setting in any capacity, so prevent PHP from flipping
// out by setting it to a safe default (UTC) if it isn't set to some other
// value.
date_default_timezone_set('UTC');
}
// Disable the insanely dangerous XML entity loader by default.
if (function_exists('libxml_disable_entity_loader')) {
libxml_disable_entity_loader(true);
}
// Now, load libphutil.
$root = dirname(dirname(__FILE__));
require_once $root.'/src/__phutil_library_init__.php';
PhutilErrorHandler::initialize();
// If possible, install a signal handler for SIGHUP which prints the current
// backtrace out to a named file. This is particularly helpful in debugging
// hung/spinning processes.
if (function_exists('pcntl_signal')) {
pcntl_signal(SIGHUP, '__phutil_signal_handler__');
}
}
function __phutil_signal_handler__($signal_number) {
$e = new Exception();
$pid = getmypid();
// Some phabricator daemons may not be attached to a terminal.
Filesystem::writeFile(
sys_get_temp_dir().'/phabricator_backtrace_'.$pid,
$e->getTraceAsString());
}
__phutil_init_script__();

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