Added /sbin/btrfs to the list of checked binary locations (used on Gentoo)

Author: nazar-pc

changelog.md

@@ -1,3 +1,6 @@
+# 0.9 (17 March, 2017)
+* Added `/sbin/btrfs` to the list of checked binary locations (used on Gentoo)
+
 # 0.8 (24 March, 2016)
 * `minimum_delete_count` and `minimum_delete_count_other` options introduced
 

just-backup-btrfs

@@ -2,14 +2,15 @@
 <?php
 namespace nazarpc;
 use
+	RuntimeException,
 	SQLite3;
 
 /**
  * @package   Just backup btrfs
  * @author    Nazar Mokrynskyi <[email protected]>
  * @copyright Copyright (c) 2014-2017, Nazar Mokrynskyi
  * @license   http://opensource.org/licenses/MIT
- * @version   0.7
+ * @version   0.9
  */
 class Just_backup_btrfs {
 	/**
@@ -22,13 +23,23 @@ class Just_backup_btrfs {
 	protected $binary;
 	/**
 	 * @param array $config
+	 *
+	 * @throws RuntimeException
 	 */
 	function __construct ($config) {
 		if (!$config) {
 			exit("Incorrect configuration, aborted\n");
 		}
 		$this->config = $config;
-		$this->binary = file_exists('/usr/sbin/btrfs') ? '/usr/sbin/btrfs' : '/bin/btrfs';
+		if (file_exists('/usr/sbin/btrfs')) {
+			$this->binary = '/usr/sbin/btrfs';
+		} elseif (file_exists('/sbin/btrfs')) {
+			$this->binary = '/sbin/btrfs';
+		} elseif (file_exists('/bin/btrfs')) {
+			$this->binary = '/bin/btrfs';
+		} else {
+			throw new RuntimeException("Can't find btrfs binary");
+		}
 	}
 	function backup () {
 		$default_config = [