get post statuses

wp_post_statuses.php

function make_post_statuses() {
	global $wp_post_statuses;

	foreach ( $wp_post_statuses as $status => $name ) {
		if ( $status != 'trash' && $status != 'publish' && $status != 'auto-draft' )
			$statuses[] = $status;
	}

	return $statuses;
}