OpenVoiceOS/buildroot-external/rootfs-overlay/usr/libexec/ovos-zram

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#!/bin/sh
# Credits go to: https://github.com/home-assistant/operating-system/
set -e
#### Options ####
TYPE=""
MOUNT=""
DEVICE=""
SIZE=0
#### Parse arguments ####
while [ "$1" != "" ]; do
key=$1
case $key in
-t|--type)
TYPE=$2
shift
;;
-s|--size)
SIZE=$2
shift
;;
-m|--mount)
MOUNT=$2
shift
;;
*)
echo "[Error] $0 : Argument '$1' unknown"
exit 1
;;
esac
shift
done
# Valide Type
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if [ "$TYPE" != "swap" ] && [ "$TYPE" != "fs" ]; then
echo "[Error] Type unknown!"
exit 1
fi
# Lookup device
if [ "$TYPE" = "swap" ]; then
DEVICE="/dev/zram0"
elif [ "$MOUNT" = "var" ]; then
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DEVICE="/dev/zram1"
#elif [ "$MOUNT" = "tmp" ]; then
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# DEVICE="/dev/zram1"
else
echo "[Error] No device for lookup!"
exit 1
fi
# Calc 20% of memory for ZRAM swap partition
if [ "$TYPE" = "swap" ] && [ "$SIZE" -eq "0" ]; then
SIZE="$(awk '/MemTotal/{ print $2 * 0.20 }' /proc/meminfo)K"
fi
# Init device
zramctl "$DEVICE" -s "$SIZE" -a lz4
# Swap
if [ "$TYPE" = "swap" ]; then
mkswap -L "ovos-zramswap" "$DEVICE"
fi
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# FileSystem
if [ "$TYPE" = "fs" ]; then
mkfs.ext4 -L "ovos-$MOUNT" -O ^has_journal "$DEVICE"
fi
# Copy persistent file structures into zram device
if [ "$MOUNT" = "var" ]; then
# Check if this is a first run
if [ ! -d /mnt/data/var ]; then
mkdir -p /mnt/data/var
cp -af /var/* /mnt/data/var/
fi
cp -af /mnt/data/var/* "$DEVICE"
fi