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84 lines
2.6 KiB
OCaml
84 lines
2.6 KiB
OCaml
(* guestfs-inspection
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* Copyright (C) 2009-2025 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 Std_utils
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open Mountable
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open Utils
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(* Unmount everything mounted under /sysroot.
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*
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* We have to unmount in the correct order, so we sort the paths by
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* longest first to ensure that child paths are unmounted by parent
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* paths.
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*
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* This call is more important than it appears at first, because it
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* is widely used by both test and production code in order to
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* get back to a known state (nothing mounted, everything synchronized).
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*)
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let rec umount_all () =
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(* This is called from internal_autosync and generally as a cleanup
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* function, and since the umount will definitely fail if any
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* handles are open, we may as well close them.
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*)
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(* XXX
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aug_finalize ();
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hivex_finalize ();
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journal_finalize ();
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*)
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let sysroot = Sysroot.sysroot () in
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let sysroot_len = String.length sysroot in
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let info = read_whole_file "/proc/self/mountinfo" in
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let info = String.nsplit "\n" info in
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let mps = ref [] in
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List.iter (
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fun line ->
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let line = String.nsplit " " line in
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(* The field of interest is the 5th field. Whitespace is escaped
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* with octal sequences like \040 (for space).
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* See fs/seq_file.c:mangle_path.
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*)
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if List.length line >= 5 then (
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let mp = List.nth line 4 in
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let mp = proc_unmangle_path mp in
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(* Allow a mount directory like "/sysroot" or "/sysroot/..." *)
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if (sysroot_len > 0 && String.is_prefix mp sysroot) ||
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(String.is_prefix mp sysroot &&
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String.length mp > sysroot_len &&
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mp.[sysroot_len] = '/') then
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List.push_front mp mps
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)
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) info;
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let mps = !mps in
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let mps = List.sort compare_longest_first mps in
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(* Unmount them. *)
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List.iter (
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fun mp -> ignore (command "umount" [mp])
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) mps
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and compare_longest_first s1 s2 =
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let n1 = String.length s1 in
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let n2 = String.length s2 in
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n2 - n1
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