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(* guestfs-inspection
* Copyright (C) 2009-2019 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 Mountable
open Utils
(* Unmount everything mounted under /sysroot.
*
* We have to unmount in the correct order, so we sort the paths by
* longest first to ensure that child paths are unmounted by parent
* paths.
*
* This call is more important than it appears at first, because it
* is widely used by both test and production code in order to
* get back to a known state (nothing mounted, everything synchronized).
*)
let rec umount_all () =
(* This is called from internal_autosync and generally as a cleanup
* function, and since the umount will definitely fail if any
* handles are open, we may as well close them.
*)
(* XXX
aug_finalize ();
hivex_finalize ();
journal_finalize ();
*)
let sysroot = Sysroot.sysroot () in
let sysroot_len = String.length sysroot in
let info = read_whole_file "/proc/self/mountinfo" in
let info = String.nsplit "\n" info in
let mps = ref [] in
List.iter (
fun line ->
let line = String.nsplit " " line in
(* The field of interest is the 5th field. Whitespace is escaped
* with octal sequences like \040 (for space).
* See fs/seq_file.c:mangle_path.
*)
if List.length line >= 5 then (
let mp = List.nth line 4 in
let mp = proc_unmangle_path mp in
(* Allow a mount directory like "/sysroot" or "/sysroot/..." *)
if (sysroot_len > 0 && String.is_prefix mp sysroot) ||
(String.is_prefix mp sysroot &&
String.length mp > sysroot_len &&
mp.[sysroot_len] = '/') then
List.push_front mp mps
)
) info;
let mps = !mps in
let mps = List.sort compare_longest_first mps in
(* Unmount them. *)
List.iter (
fun mp -> ignore (command "umount" [mp])
) mps
and compare_longest_first s1 s2 =
let n1 = String.length s1 in
let n2 = String.length s2 in
n2 - n1
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