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<?php
/**
* Stream outputter to send data to a file via some filter program.
* Even if compression is available in a library, using a separate
* program can allow us to make use of a multi-processor system.
*
* Copyright © 2003, 2005, 2006 Brooke Vibber <bvibber@wikimedia.org>
* https://www.mediawiki.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
use MediaWiki\Shell\Shell;
/**
* @ingroup Dump
*/
class DumpPipeOutput extends DumpFileOutput {
/** @var string */
protected $command;
/** @var string|null */
protected $filename;
/** @var resource|false */
protected $procOpenResource = false;
/**
* @param string $command
* @param string|null $file
*/
public function __construct( $command, $file = null ) {
if ( $file !== null ) {
$command .= " > " . Shell::escape( $file );
}
$this->startCommand( $command );
$this->command = $command;
$this->filename = $file;
}
/**
* @param string $string
*/
public function writeCloseStream( $string ) {
parent::writeCloseStream( $string );
if ( $this->procOpenResource ) {
proc_close( $this->procOpenResource );
$this->procOpenResource = false;
}
}
/**
* @param string $command
*/
public function startCommand( $command ) {
$spec = [
0 => [ "pipe", "r" ],
];
$pipes = [];
$this->procOpenResource = proc_open( $command, $spec, $pipes );
$this->handle = $pipes[0];
}
/**
* @inheritDoc
*/
public function closeRenameAndReopen( $newname ) {
$this->closeAndRename( $newname, true );
}
/**
* @inheritDoc
*/
public function closeAndRename( $newname, $open = false ) {
$newname = $this->checkRenameArgCount( $newname );
if ( $newname ) {
if ( $this->handle ) {
fclose( $this->handle );
$this->handle = false;
}
if ( $this->procOpenResource ) {
proc_close( $this->procOpenResource );
$this->procOpenResource = false;
}
$this->renameOrException( $newname );
if ( $open ) {
$command = $this->command;
$command .= " > " . Shell::escape( $this->filename );
$this->startCommand( $command );
}
}
}
}
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