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#!/usr/bin/env bash
#
# Script to create stage4's fstab entry for swap devices
#
# Will use swap partitions of MBR's type '82' or
# GPT UUID '0657fd6d-a4ab-43c4-84e5-0933c84b4f4f'
#
. /etc/openslx
for swap_dev in \
$(slx-tools dev_find_partitions "82" "0657fd6d-a4ab-43c4-84e5-0933c84b4f4f"); do
[ -z "$swap_dev" ] && continue
# Generate swap fstab entry for NEWROOT. Use priority 10 to prefer zram
echo -e "$swap_dev\tswap\t\tswap\t\tx-systemd.makefs,pri=10\t0\t0" \
>> "$NEWROOT/etc/fstab"
# check if configured not to wipe any existing filesystem
[ "$SLX_WIPE_SWAP_DEVICE" = "yes" ] || continue
# create a drop-in to wipe the device's filesystem
swap_dev_systemd_escaped="$(tr '/' '-' <<< ${swap_dev:1})"
base_dir="$NEWROOT/etc/systemd/system"
dropin_dir="$base_dir/systemd-mkswap@${swap_dev_systemd_escaped}.service.d"
mkdir -p "$dropin_dir"
cat <<- EOF > "$dropin_dir/wipefs.conf"
[Service]
ExecStartPre=/sbin/wipefs -a %f
EOF
done
true
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