Differential D20616 Diff 49192 src/filesystem/PhutilProcessRef.php

Changeset View

Standalone View

src/filesystem/PhutilProcessRef.php

	<?php			<?php

	final class PhutilProcessRef			final class PhutilProcessRef
	extends Phobject {			extends Phobject {

	private $pid;			private $pid;
	private $command;			private $command;
	private $isOverseer;			private $isOverseer;
	private $instance;			private $instance;
				private $argv;

	public function setPID($pid) {			public function setPID($pid) {
	$this->pid = $pid;			$this->pid = $pid;
	return $this;			return $this;
	}			}

	public function getPID() {			public function getPID() {
	return $this->pid;			return $this->pid;
	}			}

	public function setCommand($command) {			public function getCommand() {
	$this->command = $command;			if (!$this->command) {
	return $this;			$this->command = phutil_string_cast(csprintf('%LR', $this->argv));
	}			}

	public function getCommand() {
	return $this->command;			return $this->command;
	}			}

	public function setIsOverseer($is_overseer) {			public function getIsOverseer() {
	$this->isOverseer = $is_overseer;			if ($this->isOverseer === null) {
	return $this;			$this->isOverseer = $this->getCommandMatch(
				array(
				array('phd-daemon'),
				array('php', 'phd-daemon'),
				amckinleyUnsubmitted Not Done Inline Actions Is the HHVM binary also called `php`? What if someone uses a `start_phabricator.go` file that does `fork/exec` to start the daemons? amckinley: Is the HHVM binary also called `php`? What if someone uses a `start_phabricator.go` file that…
				epriestleyAuthorUnsubmitted Done Inline Actions The "php" comes from the `#!/usr/bin/env php` shebang line in the `phd-daemon` file. I believe you'd have to aggressively try to inject misbehavior here to break anything. For example, if I symlink `quack` to `php` and then use `#!/usr/bin/env quack`, the process comes up named "quack" -- so I suspect this is robust even in the face of `php -> php5` or similar. If not, we may need to add more patterns here, but we can cross that bridge when we come to it. Although I'm not sure my testing is exhaustive, I can't find any way to change the process title under macOS as long as some parent process runs `bin/phd start`. Some stuff I tried: `sudo ...` `exec sudo ...` `exec ...` `nohup ... &` wrapper script wrapper script that forks first Setting `phd.user` to some other user, then running `bin/phd start` as a different user so it does a `sudo` internally. These all ultimately produce a process with the same name. It's definitely possible there's some other trick here, but I wasn't able to find one anywhere near the beaten path. Obviously, you can do something other than `bin/phd start` to start a daemon process that has a different process title, but I think it's fair to say "if you don't use `bin/phd start` to start the process, you should not expect `bin/phd status/restart/etc` to manage it". epriestley: The "php" comes from the `#!/usr/bin/env php` shebang line in the `phd-daemon` file. I believe…
				));
	}			}

	public function getIsOverseer() {
	return $this->isOverseer;			return $this->isOverseer;
	}			}

	public function setInstance($instance) {			public function setInstance($instance) {
	$this->instance = $instance;			$this->instance = $instance;
	return $this;			return $this;
	}			}

	public function getInstance() {			public function getInstance() {
	return $this->instance;			return $this->instance;
	}			}

				private function getCommandMatch(array $patterns) {
				$argv = $this->getArgv();

				foreach ($patterns as $pattern) {
				$pattern = array_values($pattern);
				$is_match = true;
				for ($ii = 0; $ii < count($pattern); $ii++) {
				if (basename($argv[$ii]) !== $pattern[$ii]) {
				$is_match = false;
				break;
				}
				}

				if ($is_match) {
				return true;
				}
				}

				return false;
				}

				public function setArgv(array $argv) {
				$this->argv = $argv;
				return $this;
				}

				public function getArgv() {
				return $this->argv;
				}

	}			}