Differential D25039 Diff 96 src/utils/PhutilSystem.php

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src/utils/PhutilSystem.php

	<?php			<?php

	/**			/**
	* Interact with the operating system.			* Interact with the operating system.
	*			*
				* @task stdio Interacting with Standard I/O
	* @task memory Interacting with System Memory			* @task memory Interacting with System Memory
	*/			*/
	final class PhutilSystem extends Phobject {			final class PhutilSystem extends Phobject {

				private static $stdin = false;
				private static $stderr = false;
				private static $stdout = false;

				/**
				* @task stdio
				*/
				public static function getStdinHandle() {
				if (self::$stdin === false) {
				self::$stdin = self::getStdioHandle('STDIN');
				}

				return self::$stdin;
				}

				/**
				* @task stdio
				*/
				public static function getStdoutHandle() {
				if (self::$stdout === false) {
				self::$stdout = self::getStdioHandle('STDOUT');
				}

				return self::$stdout;
				}

				/**
				* @task stdio
				*/
				public static function getStderrHandle() {
				if (self::$stderr === false) {
				self::$stderr = self::getStdioHandle('STDERR');
				}

				return self::$stderr;
				}

				/**
				* @task stdio
				*/
				public static function writeStderr($message) {
				$stderr = self::getStderrHandle();

				if ($stderr === null) {
				return;
				}

				$message = phutil_string_cast($message);
				@fwrite($stderr, $message);
				}


				/**
				* @task stdio
				*/
				private static function getStdioHandle($ref) {
				if (defined($ref)) {
				return constant($ref);
				}

				return null;
				}

	/**			/**
	* Get information about total and free memory on the system.			* Get information about total and free memory on the system.
	*			*
	* Because "free memory" is a murky concept, the interpretation of the values			* Because "free memory" is a murky concept, the interpretation of the values
	* returned from this method will vary from system to system and the numbers			* returned from this method will vary from system to system and the numbers
	* themselves may be only roughly accurate.			* themselves may be only roughly accurate.
	*			*
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