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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 Printf
open Unix
open Std_utils
open Utils
let rec findfs_uuid uuid =
findfs "UUID" uuid
and findfs_label label =
findfs "LABEL"label
and findfs tag str =
(* Kill the cache file, forcing blkid to reread values from the
* original filesystems. In blkid there is a '-p' option which is
* supposed to do this, but (a) it doesn't work and (b) that option
* is not supported in RHEL 5.
*)
(try unlink "/etc/blkid/blkid.tab" with Unix_error _ -> ());
(try unlink "/run/blkid/blkid.tab" with Unix_error _ -> ());
let out = command "findfs" [ sprintf "%s=%s" tag str ] in
(* Trim trailing \n if present. *)
let out = String.trim out in
if String.is_prefix out "/dev/mapper/" ||
String.is_prefix out "/dev/dm-" then (
match Lvm_utils.lv_canonical out with
| None ->
(* Ignore the case where 'out' doesn't appear to be an LV.
* The best we can do is return the original as-is.
*)
out
| Some out -> out
)
else
out
|
