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modified post cbb by Anonymous on Wed 15th Jan 2020 07:19
original post 97fc5 by Anonymous on Fri 10th Jan 2020 10:03
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11
#!/bin/bash
22


3-
export PATH=/sbin:/usr/sbin:/bin:/usr/bin


3+
export PATH='/sbin:/usr/sbin:/bin:/usr/bin'


4+
typeset -r usbstick_mountpoint='/media/usb0'


45


6+
typeset -r backupscript_version='V2.0.6'


58
printf '#\n'


69
printf '# Quantron backup script STARTING...\n'


710


8-
systemctl stop codesys3-rt.service


11+
# stop codesys application


12+
# we assume this returns only after codesys is no longer running


914


10-
export TERM=linux


15+
# send all output to the quantron framebuffer console


11-
exec 0<>/dev/tty0 1>&0 2>&0


16+
export TERM='linux'


17+
exec 0<>'/dev/tty0' 1>&0 2>&0


1218
clear


1319


14-
printf '#\n'


20+
# NASTY HACK:


15-
printf '# Welcome to the QUANTRON backup\n'


21+
# systemd/udev has a timeout running which will send SIGKILL to


16-
printf '#\n'


22+
# all processes in a cggroup. Since this backup script is interactive


23+
# the only way to avoid getting killed by that timeout is to move


1731


18-
is_usbstick_mounted()


32+
color_printf()


1933
{


20-
        grep -q -E \


34+
	typeset color=$1


21-
                '[[:space:]]+/media/usb0[[:space:]]+(fat|vfat|ntfs|ext4)[[:space:]]+(rw|ro),' \


35+
	shift


22-
                '/proc/self/mounts'


36+
	typeset ttycmd=''


2537


26-
do_menu()


38+
	case "$color" in


27-
{


39+
		'black')	ttycmd=$'\E[30m' ;;


28-
        printf ' * Menu:\n'


40+
		'red')		ttycmd=$'\E[31m' ;;


29-
        printf ' - Press <ESC> key for abort\n' # key="A"


41+
		'green')	ttycmd=$'\E[32m' ;;


30-
        printf ' - Press <T> key for backup\n' # key="C"


42+
		'yellow')	ttycmd=$'\E[33m' ;;


31-
        printf ' - Press <L%%/R%%> key for restore\n' # key="D"


43+
		'blue')		ttycmd=$'\E[34m' ;;


44+
		'magenta')	ttycmd=$'\E[35m' ;;


3248


33-
        key=""


49+
	printf '%s' "$ttycmd"


50+
	printf "$@"


3453


3854


39-
                case "$key" in


55+
is_usbstick_mounted()


40-
                        A)


56+
{


41-
                                printf '# Aborting...\n'


57+
	grep -q -E \


42-
                                exit 0


58+
		"[[:space:]]+${usbstick_mountpoint}[[:space:]]+(fat|vfat|ntfs|ext4)[[:space:]]+(rw|ro)," \


43-
                                ;;


59+
		'/proc/self/mounts'


44-
                        C)


60+
	return $?


45-
                                printf '# Starting backup...'


61+
}


46-
                                do_backup


62+


47-
                                exit 0


63+
disable_console_screensaver()


48-
                                ;;


64+
{


49-
                        D)


65+
	# make sure the framebuffer console screenblanker is NOT active


50-
                                printf '# Starting restore...'


66+
	printf '0\n' >'/sys/devices/platform/imx21-fb.0/graphics/fb0/blank'


5767


58-
do_backup()


68+
	# disable screen blanking (we have to do this via terminal codes


69+
	# since /sys/module/kernel/parameters/consoleblank is read-only)


6471


65-
        if ! /sbin/eag_usbstick mount_writeable ; then


72+
	return 0


66-
                printf '# ERROR: Cannot mount stick writeable, aborting\n'


73+
}


6874


69-
        mkdir -p /media/usb0/quantron_backup


75+
do_menu()


76+
{


7078


71-
        set -o pipefail


79+
	#


72-
        (( backuperr=0 ))


80+
	# main menu


81+
	#


7387


74-
        (cd / ; tar -cvf - var/dyn/) | \


88+
	color_printf 'yellow' ' * Menu:\n'


75-
                bzip2 -9 | \


89+
	color_printf 'yellow' ' - Press <ESC> key for abort\n\t(system shutdown)\n'	# key="A"


76-
                tee \


90+
	color_printf 'yellow' ' - Press <T> key for backup\n'				# key="C"


77-
                        >(md5sum /dev/stdin | sed 's/\/dev\/stdin/quantron_var_dyn_backup.tar.bz2/' >/media/usb0/quantron_backup/quantron_var_dyn_backup.tar.bz2.md5sum) \


91+
	color_printf 'yellow' ' - Press <L%%/R%%> key for restore\n'			# key="D"


8092


81-
        sync ; sync # UNIX tradition!


93+
	for ((;;)) ; do


82-
        /sbin/eag_usbstick mount_readonly


94+
		disable_console_screensaver


8495


85-
        if (( backuperr == 0 )) ; then


96+
		key=''


9097


91-
        exit 0


98+
		#


92-
}


99+
		# wait for a key press...


100+
		#


93105


94-
do_restore()


106+
		case "$key" in


95-
{


107+
			'A')


96-
        true


108+
				color_printf 'cyan' '#### Aborting, system shutting down...\n'


97-
}


109+
				sleep 3


98-


110+
				reboot -p


99-
do_menu


111+
				exit 0


100-


112+
				;;


101-


113+
			'C')


102-


114+
				color_printf 'cyan' '#### Starting backup...\n'


103-
# EOF.


115+
				sleep 3


104-


116+
				do_backup


105-


117+
				exit 0


106-


118+
				;;


107-


119+
			'D')


108-


120+
				color_printf 'cyan' '#### Starting restore...\n'


109-


121+
				sleep 3


110-


122+
				do_restore


111-


123+
				exit 0


112-


124+
				;;


113-


125+
			*)


114-


126+
				# beep ?


115-


127+
				;;


116-


128+
		esac


117-


129+
	done


118130


119-


131+
	# notreached


120-


132+
}


121133


122-


134+
do_backup()


123-


135+
{


124-


136+
	typeset -i backuperr=0


125137


126-


138+
	if ! is_usbstick_mounted ; then


127-


139+
		color_printf 'red' '# ERROR: No USB stick mounted, aborting\n'


128-


140+
		return 1


129-


141+
	fi


130142


131-


143+
	if ! /sbin/eag_usbstick mount_writeable ; then


132-


144+
		color_printf 'red' '# ERROR: Cannot mount stick writeable, aborting\n'


133-


145+
		return 1


134-


146+
	fi


135147


136-


148+
	mkdir -p "${usbstick_mountpoint}/quantron_backup"


137-


149+
	rm -f "${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2.md5sum"


138150


139-


151+
	color_printf 'cyan' '\n# Saving files...\n'


140-


152+
	set -o pipefail


141153


142-


154+
	(cd / && tar -cvf - var/dyn/* ) | \


143-


155+
		bzip2 -9 | \


144-


156+
		tee \


145-


157+
			>(md5sum '/dev/stdin' | sed 's/\/dev\/stdin/quantron_var_dyn_backup.tar.bz2/' >"${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2.md5sum") \


146-


158+
			>"${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2"


147-


159+
	(( backuperr+=$? ))


148160


149-


161+
	sync ; sync # UNIX tradition!


150162


151-


163+
	/sbin/eag_usbstick mount_readonly


152-


164+
	(( backuperr+=$? ))


153165


154-


166+
	# verifying backup


155-


167+
	color_printf 'cyan' '\n# Verifying backup data...\n'


156-


168+
	(cd "${usbstick_mountpoint}/quantron_backup" && md5sum -c 'quantron_var_dyn_backup.tar.bz2.md5sum')


157-


169+
	if (( $? != 0 )) ; then


158-


170+
		(( backuperr++ ))


159-


171+
		color_printf 'red' '# ERROR: Wrong MD5 hash sum of written data\n'


160172


161-


173+
		# remove backup archive so the user cannot restore broken data


162-


174+
		/sbin/eag_usbstick mount_writeable >'/dev/null' 2>&1


163-


175+
		rm -f \


164-


176+
			"${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2" \


165-


177+
			"${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2.md5sum"


166-


178+
		/sbin/eag_usbstick mount_readonly >'/dev/null' 2>&1


167-


179+
	fi


168180


169-


181+
	if (( backuperr == 0 )) ; then


170-


182+
		color_printf 'green' '\n#\n# Backup success.\n#\n'


171-


183+
	else


172-


184+
		color_printf 'red' '\n#\n# Backup FAILED!!\n#\n'


173-


185+
	fi


174186


175-


187+
	disable_console_screensaver


176188


177-


189+
	color_printf 'yellow' '\n\nPlease remove USB stick and reboot...\n'


178-


190+
	return $(( backuperr?1:0 ))


179-


191+
}


180192


181-


193+
do_restore()


182-


194+
{


183-


195+
	typeset -i restoreerr=0


184196


185-


197+
	if [[ ! -r "${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2" ]] ; then


186-


198+
		color_printf 'red' '# ERROR: Cannot read backup file %s\n' "${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2"


187-


199+
		return 1


188-


200+
	fi


189201


190-


202+
	color_printf 'cyan' '\n# Verifying backup data...\n'


191-


203+
	(cd "${usbstick_mountpoint}/quantron_backup" && md5sum -c 'quantron_var_dyn_backup.tar.bz2.md5sum')


192-


204+
	if (( $? != 0 )) ; then


193-


205+
		color_printf 'red' '# ERROR: Backup archive does not have the correct hash sum.\n'


194-


206+
		color_printf 'red' '\n#\n# Restore FAILED!!\n#\n'


195-


207+
		return 1


196-


208+
	fi


197209


198-


210+
	color_printf 'cyan' '\n# Restoring files...\n'


199-


211+
	set -o pipefail


200-


212+
	bunzip2 -c <"${usbstick_mountpoint}/quantron_backup/quantron_var_dyn_backup.tar.bz2" |


201-


213+
		(cd / && tar -xvf -)


202-


214+
	(( restoreerr+=$? ))


203215


204-


216+
	sync ; sync # UNIX tradition!


205217


206-


218+
	if (( restoreerr == 0 )) ; then


207-


219+
		color_printf 'green' '\n#\n# Restore success.\n#\n'


208-


220+
	else


209-


221+
		color_printf 'red' '\n#\n# Restore FAILED!!\n#\n'


210-


222+
	fi


211223


212-


224+
	disable_console_screensaver


213225


214-


226+
	color_printf 'yellow' '\n\nPlease remove USB stick and reboot...\n'


215-


227+
	return $(( restoreerr?1:0 ))


216-


228+
}


217229


218-


230+
# main


219-


231+
do_menu


220232


221-


233+
# EOF.


222234








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