snapshot+systemupdate.sh

#!/bin/bash
#
# Snapshot + System Update
# ---------------------------
# Snapshot - Rollback - Btrfs
# ---------------------------

BTRFS=/usr/bin/btrfs
CP=/usr/bin/cp
ECHO=/usr/bin/echo
GREP=/usr/bin/grep
MOUNT=/usr/bin/mount
MV=/usr/bin/mv
PIKAUR=/usr/bin/pikaur
PACMAN=/usr/bin/pacman
REFLECTOR=/usr/bin/reflector
SED=/usr/bin/sed
SUDO=/usr/bin/sudo
CHECKUPDATES=/usr/bin/checkupdates

# ---------------------------
#      Snapshot System
# ---------------------------
if $CHECKUPDATES ; then
# if true ; then
bootstate=`$MOUNT | $GREP "on / type btrfs" | $GREP "subvol=/@snapshots/TESTING"`
if [ -z "$bootstate" ]
    then
        $ECHO ""
        $ECHO $bootstate
        $ECHO ""
        $ECHO "System ist nicht mit TESTING hochgefahren !"
        $ECHO "ENDE !"
        sleep 2
        exit 1
    else
    # -------- make new OLDSTABLE --------
        $SUDO $BTRFS subvolume delete /.snapshots/OLDSTABLE
        $SUDO $MV /.snapshots/STABLE /.snapshots/OLDSTABLE
        $SUDO $SED -i 's/STABLE/OLDSTABLE/g' /.snapshots/OLDSTABLE/etc/fstab
        $SUDO $CP /boot/vmlinuz-linux-stable /boot/vmlinuz-linux-oldstable
        $SUDO $CP /boot/initramfs-linux-stable.img /boot/initramfs-linux-oldstable.img
        # $SUDO $CP /boot/vmlinuz-linux-lts-stable /boot/vmlinuz-linux-lts-oldstable
        # $SUDO $CP /boot/initramfs-linux-lts-stable.img /boot/initramfs-linux-lts-oldstable.img

        # --------- make new STABLE ----------
        $SUDO $BTRFS subvolume snapshot / /.snapshots/STABLE
        $SUDO $SED -i 's/TESTING/STABLE/g' /.snapshots/STABLE/etc/fstab
        $SUDO $CP /boot/vmlinuz-linux /boot/vmlinuz-linux-stable
        $SUDO $CP /boot/initramfs-linux.img /boot/initramfs-linux-stable.img
        # $SUDO $CP /boot/vmlinuz-linux-lts /boot/vmlinuz-linux-lts-stable
        # $SUDO $CP /boot/initramfs-linux-lts.img /boot/initramfs-linux-lts-stable.img

        # ---------------------------
        #      Update System
        # ---------------------------
        $SUDO $REFLECTOR -l 10 -p https --sort rate # initiate 2 ChannelFastSpeed of MagentaHybrid-Router
        $SUDO $REFLECTOR --verbose -l 10 -p https --sort rate --save /etc/pacman.d/mirrorlist
        # $SUDO $PACMAN -Syu
        $PIKAUR -Syu # aktualisiert AUR gleich mit :-)

        # -------------------------------------------------------------------------------------
        #    disable automatic-search for grub - only 00_header 40_custom 41_custom are needed
        # -------------------------------------------------------------------------------------
        for file in `ls /etc/grub.d/ | grep -v ^4 | grep -v README | grep -v ^00 | grep -v disabled$` ; do
            $SUDO chmod 644 /etc/grub.d/$file
            $SUDO mv /etc/grub.d/$file /etc/grub.d/"$file"_disabled
        done

        # --------------------------------------------
        #    Balance Filesystem
        # --------------------------------------------
        $SUDO $BTRFS balance start -dusage=5 /btrfs

fi
else
    echo "Keine Updates vorhanden - ENDE !"
    sleep 2
fi