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You may have run out of disk space.' ); $this->strings['start_rollback'] = __( 'Attempting to restore the previous version.' ); $this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has been restored to your previous version.' ); } /** * Upgrades WordPress core. * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass. * @global callable $_wp_filesystem_direct_method Filesystem direct method callback. * * @param object $current Response object for whether WordPress is current. * @param array $args { * Optional. Arguments for upgrading WordPress core. Default empty array. * * @type bool $pre_check_md5 Whether to check the file checksums before * attempting the upgrade. Default true. * @type bool $attempt_rollback Whether to attempt to rollback the chances if * there is a problem. Default false. * @type bool $do_rollback Whether to perform this "upgrade" as a rollback. * Default false. * } * @return string|false|WP_Error New WordPress version on success, false or WP_Error on failure. */ public function upgrade( $current, $args = array() ) { global $wp_filesystem; require ABSPATH . WPINC . '/version.php'; // $wp_version; $start_time = time(); $defaults = array( 'pre_check_md5' => true, 'attempt_rollback' => false, 'do_rollback' => false, 'allow_relaxed_file_ownership' => false, ); $parsed_args = wp_parse_args( $args, $defaults ); $this->init(); $this->upgrade_strings(); // Is an update available? if ( ! isset( $current->response ) || 'latest' === $current->response ) { return new WP_Error( 'up_to_date', $this->strings['up_to_date'] ); } $res = $this->fs_connect( array( ABSPATH, WP_CONTENT_DIR ), $parsed_args['allow_relaxed_file_ownership'] ); if ( ! $res || is_wp_error( $res ) ) { return $res; } $wp_dir = trailingslashit( $wp_filesystem->abspath() ); $partial = true; if ( $parsed_args['do_rollback'] ) { $partial = false; } elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() ) { $partial = false; } /* * If partial update is returned from the API, use that, unless we're doing * a reinstallation. If we cross the new_bundled version number, then use * the new_bundled zip. Don't though if the constant is set to skip bundled items. * If the API returns a no_content zip, go with it. Finally, default to the full zip. */ if ( $parsed_args['do_rollback'] && $current->packages->rollback ) { $to_download = 'rollback'; } elseif ( $current->packages->partial && 'reinstall' !== $current->response && $wp_version === $current->partial_version && $partial ) { $to_download = 'partial'; } elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' ) && ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) { $to_download = 'new_bundled'; } elseif ( $current->packages->no_content ) { $to_download = 'no_content'; } else { $to_download = 'full'; } // Lock to prevent multiple Core Updates occurring. $lock = WP_Upgrader::create_lock( 'core_updater', 15 * MINUTE_IN_SECONDS ); if ( ! $lock ) { return new WP_Error( 'locked', $this->strings['locked'] ); } $download = $this->download_package( $current->packages->$to_download, false ); /* * Allow for signature soft-fail. * WARNING: This may be removed in the future. */ if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) { // Output the failure error as a normal feedback, and not as an error: /** This filter is documented in wp-admin/includes/update-core.php */ apply_filters( 'update_feedback', $download->get_error_message() ); // Report this failure back to WordPress.org for debugging purposes. wp_version_check( array( 'signature_failure_code' => $download->get_error_code(), 'signature_failure_data' => $download->get_error_data(), ) ); // Pretend this error didn't happen. $download = $download->get_error_data( 'softfail-filename' ); } if ( is_wp_error( $download ) ) { WP_Upgrader::release_lock( 'core_updater' ); return $download; } $working_dir = $this->unpack_package( $download ); if ( is_wp_error( $working_dir ) ) { WP_Upgrader::release_lock( 'core_updater' ); return $working_dir; } // Copy update-core.php from the new version into place. if ( ! $wp_filesystem->copy( $working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true ) ) { $wp_filesystem->delete( $working_dir, true ); WP_Upgrader::release_lock( 'core_updater' ); return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because some files could not be copied. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' ); } $wp_filesystem->chmod( $wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE ); wp_opcache_invalidate( ABSPATH . 'wp-admin/includes/update-core.php' ); require_once ABSPATH . 'wp-admin/includes/update-core.php'; if ( ! function_exists( 'update_core' ) ) { WP_Upgrader::release_lock( 'core_updater' ); return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] ); } $result = update_core( $working_dir, $wp_dir ); // In the event of an issue, we may be able to roll back. if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) { $try_rollback = false; if ( is_wp_error( $result ) ) { $error_code = $result->get_error_code(); /* * Not all errors are equal. These codes are critical: copy_failed__copy_dir, * mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full. * do_rollback allows for update_core() to trigger a rollback if needed. */ if ( str_contains( $error_code, 'do_rollback' ) ) { $try_rollback = true; } elseif ( str_contains( $error_code, '__copy_dir' ) ) { $try_rollback = true; } elseif ( 'disk_full' === $error_code ) { $try_rollback = true; } } if ( $try_rollback ) { /** This filter is documented in wp-admin/includes/update-core.php */ apply_filters( 'update_feedback', $result ); /** This filter is documented in wp-admin/includes/update-core.php */ apply_filters( 'update_feedback', $this->strings['start_rollback'] ); $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) ); $original_result = $result; $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result, ) ); } } /** This action is documented in wp-admin/includes/class-wp-upgrader.php */ do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core', ) ); // Clear the current updates. delete_site_transient( 'update_core' ); if ( ! $parsed_args['do_rollback'] ) { $stats = array( 'update_type' => $current->response, 'success' => true, 'fs_method' => $wp_filesystem->method, 'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ), 'fs_method_direct' => ! empty( $GLOBALS['_wp_filesystem_direct_method'] ) ? $GLOBALS['_wp_filesystem_direct_method'] : '', 'time_taken' => time() - $start_time, 'reported' => $wp_version, 'attempted' => $current->version, ); if ( is_wp_error( $result ) ) { $stats['success'] = false; // Did a rollback occur? if ( ! empty( $try_rollback ) ) { $stats['error_code'] = $original_result->get_error_code(); $stats['error_data'] = $original_result->get_error_data(); // Was the rollback successful? If not, collect its error too. $stats['rollback'] = ! is_wp_error( $rollback_result ); if ( is_wp_error( $rollback_result ) ) { $stats['rollback_code'] = $rollback_result->get_error_code(); $stats['rollback_data'] = $rollback_result->get_error_data(); } } else { $stats['error_code'] = $result->get_error_code(); $stats['error_data'] = $result->get_error_data(); } } wp_version_check( $stats ); } WP_Upgrader::release_lock( 'core_updater' ); return $result; } /** * Determines if this WordPress Core version should update to an offered version or not. * * @since 3.7.0 * * @param string $offered_ver The offered version, of the format x.y.z. * @return bool True if we should update to the offered version, otherwise false. */ public static function should_update_to_version( $offered_ver ) { require ABSPATH . WPINC . '/version.php'; // $wp_version; // x.y.z $current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version ), 0, 2 ) ); // x.y $new_branch = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y $current_is_development_version = (bool) strpos( $wp_version, '-' ); // Defaults: $upgrade_dev = get_site_option( 'auto_update_core_dev', 'enabled' ) === 'enabled'; $upgrade_minor = get_site_option( 'auto_update_core_minor', 'enabled' ) === 'enabled'; $upgrade_major = get_site_option( 'auto_update_core_major', 'unset' ) === 'enabled'; // WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'development', 'branch-development', 'minor', false. if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) { if ( false === WP_AUTO_UPDATE_CORE ) { // Defaults to turned off, unless a filter allows it. $upgrade_dev = false; $upgrade_minor = false; $upgrade_major = false; } elseif ( true === WP_AUTO_UPDATE_CORE || in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development', 'branch-development' ), true ) ) { // ALL updates for core. $upgrade_dev = true; $upgrade_minor = true; $upgrade_major = true; } elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) { // Only minor updates for core. $upgrade_dev = false; $upgrade_minor = true; $upgrade_major = false; } } // 1: If we're already on that version, not much point in updating? if ( $offered_ver === $wp_version ) { return false; } // 2: If we're running a newer version, that's a nope. if ( version_compare( $wp_version, $offered_ver, '>' ) ) { return false; } $failure_data = get_site_option( 'auto_core_update_failed' ); if ( $failure_data ) { // If this was a critical update failure, cannot update. if ( ! empty( $failure_data['critical'] ) ) { return false; } // Don't claim we can update on update-core.php if we have a non-critical failure logged. if ( $wp_version === $failure_data['current'] && str_contains( $offered_ver, '.1.next.minor' ) ) { return false; } /* * Cannot update if we're retrying the same A to B update that caused a non-critical failure. * Some non-critical failures do allow retries, like download_failed. * 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2. */ if ( empty( $failure_data['retry'] ) && $wp_version === $failure_data['current'] && $offered_ver === $failure_data['attempted'] ) { return false; } } // 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2. if ( $current_is_development_version ) { /** * Filters whether to enable automatic core updates for development versions. * * @since 3.7.0 * * @param bool $upgrade_dev Whether to enable automatic updates for * development versions. */ if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) ) { return false; } // Else fall through to minor + major branches below. } // 4: Minor in-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4). if ( $current_branch === $new_branch ) { /** * Filters whether to enable minor automatic core updates. * * @since 3.7.0 * * @param bool $upgrade_minor Whether to enable minor automatic core updates. */ return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor ); } // 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1). if ( version_compare( $new_branch, $current_branch, '>' ) ) { /** * Filters whether to enable major automatic core updates. * * @since 3.7.0 * * @param bool $upgrade_major Whether to enable major automatic core updates. */ return apply_filters( 'allow_major_auto_core_updates', $upgrade_major ); } // If we're not sure, we don't want it. return false; } /** * Compares the disk file checksums against the expected checksums. * * @since 3.7.0 * * @global string $wp_version The WordPress version string. * @global string $wp_local_package Locale code of the package. * * @return bool True if the checksums match, otherwise false. */ public function check_files() { global $wp_version, $wp_local_package; $checksums = get_core_checksums( $wp_version, $wp_local_package ?? 'en_US' ); if ( ! is_array( $checksums ) ) { return false; } foreach ( $checksums as $file => $checksum ) { // Skip files which get updated. if ( str_starts_with( $file, 'wp-content' ) ) { continue; } if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum ) { return false; } } return true; } }