tac stupidly writes to a tempfile when the input isn't seekable, which is true in our case as it's reading from a pipe. Since the whole goal here is to avoid using disk, build an array in reverse. For whatever reason, Bash truly sucks at doing this from a execution time standpoint, but that isn't really a concern here. Signed-off-by: Dave Reisner <dreisner@archlinux.org> --- functions | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/functions b/functions index 02852b8..b409055 100644 --- a/functions +++ b/functions @@ -497,8 +497,8 @@ umount_all() { continue fi - mounts+=("$target") - done < <(findmnt -mrunRo TARGET,FSTYPE,OPTIONS / | tac) + mounts=("$target" "${mounts[@]}") + done < <(findmnt -mrunRo TARGET,FSTYPE,OPTIONS /) umount -r "${mounts[@]}" -- 1.7.8.3