Maxime Devos <maximede...@telenet.be> skribis: > Ludovic Courtès schreef op wo 01-06-2022 om 18:38 [+0200]: >> There’s a talk by Lennart Poettering where he explains that, contrary to >> what one might think, “chown -R $HOME” turns out to be fast enough that >> systemd-homed can do that unconditionally (off the of my head). > > Interesting.
‘%gdm-activation’ has an optimization to recurse only if the top-level directory has itself the wrong UID: --8<---------------cut here---------------start------------->8--- (define %gdm-activation ;; Ensure /var/lib/gdm is owned by the "gdm" user. This is normally the ;; case but could be wrong if the "gdm" user was created, then removed, and ;; then recreated under a different UID/GID: <https://bugs.gnu.org/37423>. (with-imported-modules '((guix build utils)) #~(begin (use-modules (guix build utils)) (let* ((gdm (getpwnam "gdm")) (uid (passwd:uid gdm)) (gid (passwd:gid gdm)) (st (stat "/var/lib/gdm" #f))) ;; Recurse into /var/lib/gdm only if it has wrong ownership. (when (and st (or (not (= uid (stat:uid st))) (not (= gid (stat:gid st))))) (for-each (lambda (file) (chown file uid gid)) (find-files "/var/lib/gdm" #:directories? #t))))))) --8<---------------cut here---------------end--------------->8--- We can use that trick if needed: we’d get only one stat(2) call in the common case. Ludo’.
