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| 1 | <?php |
| 2 | /** |
| 3 | * Execute the MySQL client binary, connecting to the wiki's DB. |
| 4 | * Note that this will not do table prefixing or variable substitution. |
| 5 | * To safely run schema patches, use sql.php. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * http://www.gnu.org/copyleft/gpl.html |
| 21 | * |
| 22 | * @file |
| 23 | * @ingroup Maintenance |
| 24 | */ |
| 25 | |
| 26 | use MediaWiki\Shell\Shell; |
| 27 | use Wikimedia\IPUtils; |
| 28 | |
| 29 | require_once __DIR__ . '/Maintenance.php'; |
| 30 | |
| 31 | /** |
| 32 | * @ingroup Maintenance |
| 33 | */ |
| 34 | class MysqlMaintenance extends Maintenance { |
| 35 | public function __construct() { |
| 36 | parent::__construct(); |
| 37 | $this->addDescription( "Execute the MySQL client binary. " . |
| 38 | "Non-option arguments will be passed through to mysql." ); |
| 39 | $this->addOption( 'write', 'Connect to the primary database', false, false ); |
| 40 | $this->addOption( 'group', 'Specify query group', false, true ); |
| 41 | $this->addOption( 'host', 'Connect to a known MySQL server', false, true ); |
| 42 | $this->addOption( 'raw-host', |
| 43 | 'Connect directly to a specific MySQL server, even if not known to MediaWiki ' |
| 44 | . 'via wgLBFactoryConf (e.g. parser cache or depooled host). ' |
| 45 | . 'Credentails will be chosen based on --cluster and --wikidb.', |
| 46 | false, |
| 47 | true |
| 48 | ); |
| 49 | $this->addOption( 'list-hosts', 'List the available DB hosts', false, false ); |
| 50 | $this->addOption( 'cluster', 'Use an external cluster by name', false, true ); |
| 51 | $this->addOption( 'wikidb', |
| 52 | 'The database wiki ID to use if not the current one', |
| 53 | false, |
| 54 | true |
| 55 | ); |
| 56 | |
| 57 | // Fake argument for help message |
| 58 | $this->addArg( '-- mysql_option ...', 'Options to pass to mysql', false ); |
| 59 | } |
| 60 | |
| 61 | public function execute() { |
| 62 | $dbName = $this->getOption( 'wikidb', false ); |
| 63 | $lbf = $this->getServiceContainer()->getDBLoadBalancerFactory(); |
| 64 | |
| 65 | // Pick LB |
| 66 | if ( $this->hasOption( 'cluster' ) ) { |
| 67 | try { |
| 68 | $lb = $lbf->getExternalLB( $this->getOption( 'cluster' ) ); |
| 69 | } catch ( InvalidArgumentException $e ) { |
| 70 | $this->fatalError( 'Error: invalid cluster' ); |
| 71 | } |
| 72 | } else { |
| 73 | $lb = $lbf->getMainLB( $dbName ); |
| 74 | } |
| 75 | |
| 76 | // List hosts, or pick host |
| 77 | if ( $this->hasOption( 'list-hosts' ) ) { |
| 78 | $serverCount = $lb->getServerCount(); |
| 79 | for ( $index = 0; $index < $serverCount; ++$index ) { |
| 80 | echo $lb->getServerName( $index ) . "\n"; |
| 81 | } |
| 82 | return; |
| 83 | } |
| 84 | if ( $this->hasOption( 'host' ) ) { |
| 85 | $host = $this->getOption( 'host' ); |
| 86 | $serverCount = $lb->getServerCount(); |
| 87 | for ( $index = 0; $index < $serverCount; ++$index ) { |
| 88 | if ( $lb->getServerName( $index ) === $host ) { |
| 89 | break; |
| 90 | } |
| 91 | } |
| 92 | if ( $index >= $serverCount ) { |
| 93 | $this->fatalError( "Error: Host not configured: \"$host\"" ); |
| 94 | } |
| 95 | } elseif ( $this->hasOption( 'write' ) ) { |
| 96 | $index = $lb->getWriterIndex(); |
| 97 | } else { |
| 98 | $group = $this->getOption( 'group', false ); |
| 99 | $index = $lb->getReaderIndex( $group ); |
| 100 | if ( $index === false && $group ) { |
| 101 | // retry without the group; it may not exist |
| 102 | $index = $lb->getReaderIndex( false ); |
| 103 | } |
| 104 | if ( $index === false ) { |
| 105 | $this->fatalError( 'Error: unable to get reader index' ); |
| 106 | } |
| 107 | } |
| 108 | if ( $lb->getServerType( $index ) !== 'mysql' ) { |
| 109 | $this->fatalError( 'Error: this script only works with MySQL/MariaDB' ); |
| 110 | } |
| 111 | |
| 112 | $serverInfo = $lb->getServerInfo( $index ); |
| 113 | // Override host. This uses the server info of the host determined |
| 114 | // by the other options for the purposes of user/password. |
| 115 | if ( $this->hasOption( 'raw-host' ) ) { |
| 116 | $host = $this->getOption( 'raw-host' ); |
| 117 | $serverInfo = [ 'host' => $host ] + $serverInfo; |
| 118 | } |
| 119 | |
| 120 | $this->runMysql( $serverInfo, $dbName ); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Run the mysql client for the given server info |
| 125 | * |
| 126 | * @param array $info |
| 127 | * @param string|false $dbName The DB name, or false to use the main wiki DB |
| 128 | */ |
| 129 | private function runMysql( $info, $dbName ) { |
| 130 | // Write the password to an option file to avoid disclosing it to other |
| 131 | // processes running on the system |
| 132 | $tmpFile = TempFSFile::factory( 'mw-mysql', 'ini' ); |
| 133 | chmod( $tmpFile->getPath(), 0600 ); |
| 134 | file_put_contents( $tmpFile->getPath(), "[client]\npassword={$info['password']}\n" ); |
| 135 | |
| 136 | // stdin/stdout need to be the actual file descriptors rather than |
| 137 | // PHP's pipe wrappers so that mysql can use them as an interactive |
| 138 | // terminal. |
| 139 | $desc = [ |
| 140 | 0 => STDIN, |
| 141 | 1 => STDOUT, |
| 142 | 2 => STDERR, |
| 143 | ]; |
| 144 | |
| 145 | // Split host and port as in DatabaseMySQL::mysqlConnect() |
| 146 | $realServer = $info['host']; |
| 147 | $hostAndPort = IPUtils::splitHostAndPort( $realServer ); |
| 148 | $socket = false; |
| 149 | $port = false; |
| 150 | if ( $hostAndPort ) { |
| 151 | $realServer = $hostAndPort[0]; |
| 152 | if ( $hostAndPort[1] ) { |
| 153 | $port = $hostAndPort[1]; |
| 154 | } |
| 155 | } elseif ( substr_count( $realServer, ':' ) == 1 ) { |
| 156 | // If we have a colon and something that's not a port number |
| 157 | // inside the hostname, assume it's the socket location |
| 158 | [ $realServer, $socket ] = explode( ':', $realServer, 2 ); |
| 159 | } |
| 160 | |
| 161 | if ( $dbName === false ) { |
| 162 | $dbName = $info['dbname']; |
| 163 | } |
| 164 | |
| 165 | $args = [ |
| 166 | 'mysql', |
| 167 | "--defaults-extra-file={$tmpFile->getPath()}", |
| 168 | "--user={$info['user']}", |
| 169 | "--database={$dbName}", |
| 170 | ]; |
| 171 | if ( $socket !== false ) { |
| 172 | $args[] = "--socket={$socket}"; |
| 173 | } else { |
| 174 | $args[] = "--host={$realServer}"; |
| 175 | } |
| 176 | if ( $port !== false ) { |
| 177 | $args[] = "--port={$port}"; |
| 178 | } |
| 179 | |
| 180 | $args = array_merge( $args, $this->getArgs() ); |
| 181 | |
| 182 | // Ignore SIGINT if possible, otherwise the wrapper terminates when the user presses |
| 183 | // ctrl-C to kill a query. |
| 184 | if ( function_exists( 'pcntl_signal' ) ) { |
| 185 | pcntl_signal( SIGINT, SIG_IGN ); |
| 186 | } |
| 187 | |
| 188 | $pipes = []; |
| 189 | $proc = proc_open( Shell::escape( $args ), $desc, $pipes ); |
| 190 | if ( $proc === false ) { |
| 191 | $this->fatalError( 'Unable to execute mysql' ); |
| 192 | } |
| 193 | |
| 194 | $ret = proc_close( $proc ); |
| 195 | if ( $ret === -1 ) { |
| 196 | $this->fatalError( 'proc_close() returned -1' ); |
| 197 | } elseif ( $ret ) { |
| 198 | $this->fatalError( 'Failed.', $ret ); |
| 199 | } |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | $maintClass = MysqlMaintenance::class; |
| 204 | require_once RUN_MAINTENANCE_IF_MAIN; |