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e2c7bddf10
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57 lines
1.7 KiB
OCaml
57 lines
1.7 KiB
OCaml
(* guestfs-inspection
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* Copyright (C) 2009-2023 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Printf
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open Unix
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open Std_utils
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open Utils
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let rec findfs_uuid uuid =
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findfs "UUID" uuid
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and findfs_label label =
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findfs "LABEL"label
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and findfs tag str =
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(* Kill the cache file, forcing blkid to reread values from the
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* original filesystems. In blkid there is a '-p' option which is
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* supposed to do this, but (a) it doesn't work and (b) that option
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* is not supported in RHEL 5.
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*)
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(try unlink "/etc/blkid/blkid.tab" with Unix_error _ -> ());
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(try unlink "/run/blkid/blkid.tab" with Unix_error _ -> ());
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let out = command "findfs" [ sprintf "%s=%s" tag str ] in
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(* Trim trailing \n if present. *)
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let out = String.trim out in
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if String.is_prefix out "/dev/mapper/" ||
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String.is_prefix out "/dev/dm-" then (
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match Lvm_utils.lv_canonical out with
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| None ->
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(* Ignore the case where 'out' doesn't appear to be an LV.
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* The best we can do is return the original as-is.
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*)
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out
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| Some out -> out
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)
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else
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out
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