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|
#!/usr/bin/env bash
set -e
dir="$1"
if [ -z "$dir" ]; then
{
echo 'This script is for destroying old /var/lib/docker directories more safely than'
echo ' "rm -rf", which can cause data loss or other serious issues.'
echo
echo "usage: $0 directory"
echo " ie: $0 /var/lib/docker"
} >&2
exit 1
fi
if [ "$(id -u)" != 0 ]; then
echo >&2 "error: $0 must be run as root"
exit 1
fi
if [ ! -d "$dir" ]; then
echo >&2 "error: $dir is not a directory"
exit 1
fi
dir="$(readlink -f "$dir")"
echo
echo "Nuking $dir ..."
echo
dir_in_dir() {
inner="$1"
outer="$2"
[ "${inner#$outer}" != "$inner" ]
}
# let's start by unmounting any submounts in $dir
# (like -v /home:... for example - DON'T DELETE MY HOME DIRECTORY BRU!)
for mount in $(awk '{ print $5 }' /proc/self/mountinfo); do
mount="$(readlink -f "$mount" || true)"
if [ "$dir" != "$mount" ] && dir_in_dir "$mount" "$dir"; then
(
set -x
umount -f "$mount"
)
fi
done
# now, let's go destroy individual btrfs subvolumes, if any exist
if command -v btrfs > /dev/null 2>&1; then
# Find btrfs subvolumes under $dir checking for inode 256
# Source: http://stackoverflow.com/a/32865333
for subvol in $(find "$dir" -type d -inum 256 | sort -r); do
if [ "$dir" != "$subvol" ]; then
(
set -x
btrfs subvolume delete "$subvol"
)
fi
done
fi
# finally, DESTROY ALL THINGS
(
shopt -s dotglob
set -x
rm -rf "$dir"/*
)
|
