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Diffstat (limited to 'src/property/mount.lisp')
-rw-r--r-- | src/property/mount.lisp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/property/mount.lisp b/src/property/mount.lisp new file mode 100644 index 0000000..eba0eca --- /dev/null +++ b/src/property/mount.lisp @@ -0,0 +1,50 @@ +;;; Consfigurator -- Lisp declarative configuration management system + +;;; Copyright (C) 2021 Sean Whitton <spwhitton@spwhitton.name> + +;;; This file 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 3, or (at your option) +;;; any later version. + +;;; This file 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, see <http://www.gnu.org/licenses/>. + +(in-package :consfigurator.property.mount) +(named-readtables:in-readtable :consfigurator) + +(defprop unmounted-below :posix (dir) + "Unmount anything mounted at or below DIR." + (:desc #?"${dir} unmounted") + (:hostattrs + (declare (ignore dir)) + ;; findmnt(1) & arguments to mount(1)/umount(1) we use are from util-linux + (os:required 'os:linux)) + (:apply + (with-change-if-changes-file-content ("/proc/mounts") + (let* ((dir (ensure-directory-pathname dir)) + (all-mounts + (mapcar #'ensure-directory-pathname + (runlines "findmnt" "-rn" "--output" "target"))) + (mounts-below (remove-if-not (rcurry #'subpathp dir) all-mounts)) + (sorted (sort mounts-below (complement #'subpathp)))) + (loop as next = (pop sorted) + while next + do (loop while (subpathp (car sorted) next) do (pop sorted)) + ;; If any of the mounts were made with --rbind then unmounting + ;; will unmount the source filesystems too (e.g. things + ;; mounted under /dev), so use --make-rslave to prevent that. + (mrun "mount" "--make-rslave" next) + (mrun "umount" "--recursive" next)))))) + +(defproplist unmounted-below-and-removed :posix (dir) + "Unmount anything mounted at or below DIR and recursively delete dir." + (:desc #?"${dir} unmounted and removed") + (:check (not (remote-exists-p dir))) + (unmounted-below dir) + (cmd:single "rm" "-rf" dir)) |