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| author | Luke Shumaker <lukeshu@parabola.nu> | 2017-04-10 13:08:33 -0400 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@parabola.nu> | 2017-04-16 23:20:29 -0400 |
| commit | d209a589f690723e5aa14f94a3b5c57222f31c54 (patch) | |
| tree | cb88b7b5063bc6a97c8ee3f2bf6187ae9ee398b5 | |
| parent | 49088b0860276c664933c2b3e36a2fef714b7a07 (diff) | |
makechrootpkg: delete_chroot: Fix the is-btrfs-subvolume check.
First of all, it ran `is_btrfs "$chrootdir"` to decide if it was on
btrfs, but $chrootdir wasn't defined locally; it just happens to work
because $chrootdir was defined in main(). (I noticed this because in
Parabola, it is called differently, so $chrootdir was empty).
So I was tempted to just change it to `is_btrfs "$copydir"`, but if
$copydir is just a regular directory on a btrfs filesystem, then it
It would leave much of $copydir intact. What we really care about is
if $copydir is a btrfs subvolume; which we can check by combining the
is_btrfs check with inspecting the inum of the directory.
I put this combined check in lib/archroot.sh:is_subvolume.
https://lists.archlinux.org/pipermail/arch-projects/2013-September/003901.html
| -rw-r--r-- | lib/archroot.sh | 11 | ||||
| -rw-r--r-- | makechrootpkg.in | 2 |
2 files changed, 11 insertions, 2 deletions
diff --git a/lib/archroot.sh b/lib/archroot.sh index 46d4963..87c28a2 100644 --- a/lib/archroot.sh +++ b/lib/archroot.sh @@ -25,6 +25,15 @@ is_btrfs() { } ## +# usage : is_subvolume( $path ) +# return : whether $path is a the root of a btrfs subvolume (including +# the top-level subvolume). +## +is_subvolume() { + [[ -e "$1" && "$(stat -f -c %T "$1")" == btrfs && "$(stat -c %i "$1")" == 256 ]] +} + +## # usage : subvolume_delete_recursive( $path ) # # Find all btrfs subvolumes under and including $path and delete them. @@ -32,7 +41,7 @@ is_btrfs() { subvolume_delete_recursive() { local subvol - is_btrfs "$1" || return 0 + is_subvolume "$1" || return 0 while IFS= read -d $'\0' -r subvol; do if ! btrfs subvolume delete "$subvol" &>/dev/null; then diff --git a/makechrootpkg.in b/makechrootpkg.in index 72b7eb7..88c2cdc 100644 --- a/makechrootpkg.in +++ b/makechrootpkg.in @@ -144,7 +144,7 @@ delete_chroot() { local copy=${1:-$2} stat_busy "Removing chroot copy [%s]" "$copy" - if is_btrfs "$chrootdir" && ! mountpoint -q "$copydir"; then + if is_subvolume "$copydir" && ! mountpoint -q "$copydir"; then subvolume_delete_recursive "$copydir" || die "Unable to delete subvolume %s" "$copydir" else |