From 6ffd11f129405c7bd663201096d8fcfcde6344a9 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Sun, 18 May 2014 22:06:38 +0200 Subject: system: Prevent grub.cfg from being GC'd. * guix/build/install.scm (install-grub): Use 'copy-file' instead of 'symlink' for GRUB.CFG. --- guix/build/install.scm | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) (limited to 'guix') diff --git a/guix/build/install.scm b/guix/build/install.scm index 564735a7f6..f61c16f13a 100644 --- a/guix/build/install.scm +++ b/guix/build/install.scm @@ -38,11 +38,18 @@ (define-module (guix build install) (define* (install-grub grub.cfg device mount-point) "Install GRUB with GRUB.CFG on DEVICE, which is assumed to be mounted on MOUNT-POINT. Return #t on success." - (mkdir-p (string-append mount-point "/boot/grub")) - (symlink grub.cfg (string-append mount-point "/boot/grub/grub.cfg")) - (zero? (system* "grub-install" "--no-floppy" - "--boot-directory" (string-append mount-point "/boot") - device))) + (let* ((target (string-append mount-point "/boot/grub/grub.cfg")) + (pivot (string-append target ".new"))) + (mkdir-p (dirname target)) + + ;; Copy GRUB.CFG instead of just symlinking it since it's not a GC root. + ;; Do that atomically. + (copy-file grub.cfg pivot) + (rename-file pivot target) + + (zero? (system* "grub-install" "--no-floppy" + "--boot-directory" (string-append mount-point "/boot") + device)))) (define (evaluate-populate-directive directive target) "Evaluate DIRECTIVE, an sexp describing a file or directory to create under -- cgit v1.2.3