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(* guestfs-inspection
* Copyright (C) 2009-2020 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
open Std_utils
open Utils
let rec vfs_type { Mountable.m_device = device } =
Option.default "" (get_blkid_tag device "TYPE")
and get_blkid_tag device tag =
let r, out, err =
commandr "blkid"
[(* Adding -c option kills all caching, even on RHEL 5. *)
"-c"; "/dev/null";
"-o"; "value"; "-s"; tag; device] in
match r with
| 0 -> Some (String.chomp out) (* success *)
| 2 -> None (* means tag not found *)
| _ -> failwithf "blkid: %s: %s: %s" device tag err
|
