Add raw device detection

src/camogmgui/camogm_interface.php

@@ -400,7 +400,12 @@ else
 				}
 				echo "</item>";
 			}
-
+			break;
+		case "list_raw_devices":
+			$devices = get_raw_dev();
+			foreach ($devices as $device) {
+				echo "<raw_device>" . $device . "</raw_device>";
+			}
 			break;
 		case "mkdir":
 			$dir_name = $_GET['name'];
@@ -601,6 +606,63 @@ function xml_footer() {
 	echo "</camogm_interface>\n";
 }
 
+/** Get a list of disk devices which have file system and can be mounted. This function
+ *  uses 'blkid' command from busybox.
+*/ 
+function get_mnt_dev()
+{
+	exec("blkid", $ids);
+	$i = 0;
+	foreach ($ids as $id) {
+		$devices[$i] = preg_replace('/: +.*/', "", $id);
+		if (preg_match('/(?<=TYPE=")[a-z0-9]+(?=")/', $id, $fs) == 1)
+			$fs_types[$i] = $fs[0];
+		else
+			$fs_types[$i] = "none";
+		$i++;
+	}
+	return array("devices" => $devices, "types" => $fs_types);
+}
+
+/** Get a list of devices whithout file system which can be used for raw disk storage from camogm. */
+function get_raw_dev()
+{
+	$j = 0;
+	$regexp = '/sd[a-z0-9]+$/';
+	$names = array();
+	$ret = get_mnt_dev();
+	$devices = $ret["devices"]; 
+	$types = $ret["types"];
+	exec("cat /proc/partitions", $partitions);
+
+	// get a list of all suitable partitions	
+	// the first two elements of an array are table header and empty line delimiter, skip them
+	for ($i = 2; $i < count($partitions); $i++) {
+		// select SATA devices only
+		if (preg_match($regexp, $partitions[$i], $name) == 1) {
+			$names[$j] = $name[0];
+			$j++;
+		}
+	}
+	
+	// filter out partitions with file system 
+	$i = 0;
+	$raw_devices = array();
+	foreach ($names as $name) {
+		$found = false;
+		foreach ($devices as $device) {
+			if (strpos($device, $name) !== false)
+				$found = true;
+		}
+		if ($found === false) {
+			// current partition is not found in the blkid list, add it to raw devices
+			$raw_devices[$i] = "/dev/" . $name;
+			$i++;
+		}
+	}
+	
+	return $raw_devices;
+}
 ?>