mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-06-07 04:17:07 +00:00
6f8f460a6c
This reverts commit cbe0f44c4f7bc3715acbf148f981bd93111c4c8f. This achieves the same result as the reverted commit wrt. process in the same manner (writing a keepalive into the socket and checking if it failed to send). However, it does _not_ allow the process to die on reaching pipe EOF, since this can cause many spams of subprocesses when stdin is actually not a tty (e.g. in a Docker container).
80 lines
1.9 KiB
PHP
80 lines
1.9 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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declare(strict_types=1);
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namespace pocketmine\console;
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use function fclose;
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use function fgets;
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use function fopen;
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use function is_resource;
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use function stream_select;
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use function trim;
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use function usleep;
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final class ConsoleReader{
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/** @var resource */
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private $stdin;
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public function __construct(){
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$this->initStdin();
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}
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private function initStdin() : void{
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if(is_resource($this->stdin)){
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fclose($this->stdin);
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}
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$this->stdin = fopen("php://stdin", "r");
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}
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/**
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* Reads a line from the console and adds it to the buffer. This method may block the thread.
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*/
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public function readLine() : ?string{
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if(!is_resource($this->stdin)){
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$this->initStdin();
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}
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$r = [$this->stdin];
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$w = $e = null;
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if(($count = stream_select($r, $w, $e, 0, 200000)) === 0){ //nothing changed in 200000 microseconds
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return null;
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}elseif($count === false){ //stream error
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return null;
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}
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if(($raw = fgets($this->stdin)) === false){ //broken pipe or EOF
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usleep(200000); //prevent CPU waste if it's end of pipe
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return null; //loop back round
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}
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$line = trim($raw);
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return $line !== "" ? $line : null;
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}
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public function __destruct(){
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fclose($this->stdin);
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}
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}
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