Linux: Burn to optical media

gistfile1.txt

#!/bin/bash

# SUDOERS /etc/sudoers.d/lbbackup
# Cmnd_Alias LS_HARDWARE = /usr/bin/lshw
# Cmnd_Alias MOUNT_UDF = /bin/mount -oloop\,rw *
# Cmnd_Alias UNMOUNT_UDF = /bin/umount /data/TEMP_UDF_DIR/MOUNT_UDF
# Cmnd_Alias BURN_UDF = /usr/bin/growisofs
# Cmnd_Alias CHOWN_MOUNT = /bin/chown -R lbbackup\:lbbackup /data/TEMP_UDF_DIR/MOUNT_UDF
# lbbackup ALL=(ALL) NOPASSWD: LS_HARDWARE, MOUNT_UDF, UNMOUNT_UDF, BURN_UDF, CHOWN_MOUNT

  backup_date=`date +"%Y%m%d.%H%M%S"`
     LOG_FILE=/var/log/backup/backup_burn_remote_copy.${backup_date}.log
 CATALOG_FILE=/var/log/backup/backup_burn_remote_copy.${backup_date}.catalog
  LOOP_DEVICE=/dev/sr0
     UDF_FILE=/data/TEMP_UDF_DIR/backup_${backup_date}.udf
    UDF_MOUNT=/data/TEMP_UDF_DIR/MOUNT_UDF
S3_BACKUP_DIR=/data/backups/s3/

# prints stdout and logs to file
function logger ()
{
	echo "`date +"%Y%m%d.%H%M%S"` ${1}" | tee -a $LOG_FILE
}

# function to wrap errors and exit
rc=0
function check_return_value
{
	if [ $rc -eq 0 ] ; then
		logger "	* [INFO] Success! Return Value: $rc"
	else
		logger "	* [ERROR] Operation FAILED!!! Please check the logs!"
        exit 55
	fi
}

function notify_error_exit
{
	# coming soon - email alerts
	echo "ERROR: ${1}" | tee -a $LOG_FILE
	exit 99
}

function notify_success_email
{
	echo "coming soon"
}

function check_data_mount
{
	# check if /data mount is mounted
	if [[ `/bin/mount -v | grep "/dev/mapper/data on /data type ext4 (rw)"` ]] ; then
		logger "	* [INFO] /data mount is mounted"
	else
		notify_error_exit "DATA Mount /data NOT mounted"
	fi
}

function check_loop_device
{
	if [[ `sudo lshw | awk '/\*-cd/,/con/' | sed -e 's/^[ \t]*//' | grep "status=ready"` ]] ; then
			logger "	* [INFO] LOOP Device $LOOP_DEVICE is READY (media inside the drive)"
	else
		notify_error_exit "Loop device (Bluray Drive) is not in Ready state. Check if blank media is inside the drive."
	fi
}

function copy_latest_backups
{
	# Make catalog of backups from 0-7 days ago

	# DB FILES
	for i in `seq 0 7`; do
		day_i=`date --date="$i days ago" +"%Y%m%d"`
		/usr/bin/find ${S3_BACKUP_DIR}  -name *${day_i}*.bak -type f -print0 |  du -hc --files0-from=-  | grep -v total >> ${CATALOG_FILE}
	done

	# S3 FILES
	# COMING SOON

	logger " ** [FILES TO BACKUP UP] **"
	cat ${CATALOG_FILE} | sort -k2 | tee -a $LOG_FILE

	/bin/cp -v ${CATALOG_FILE} ${UDF_MOUNT} | tee -a $LOG_FILE
	/usr/bin/awk '{print $2}' ${CATALOG_FILE} | /usr/bin/xargs -I {} /bin/cp -v --parents {} ${UDF_MOUNT} | tee -a $LOG_FILE
	rc=${PIPESTATUS[0]} ; check_return_value
}

function udf_mount
{
	# check if /data mount is mounted
	if [[ `/bin/mount -v | grep "/data/TEMP_UDF_DIR/MOUNT_UDF"` ]] ; then
		notify_error_exit "Temp UDF device already mounted. Please check why that is the case. There should be no UDF loop devices mounted before we attempt to mount a new UDF loop device :)"
	fi

    # create UDF file
    /usr/bin/truncate --size=25GB $UDF_FILE
    /usr/bin/mkudffs $UDF_FILE

    # mount UDF file so we can copy things to to it
    sudo /bin/mount -oloop,rw $UDF_FILE $UDF_MOUNT
}

function udf_burn
{
    sudo /bin/umount $UDF_MOUNT | tee -a $LOG_FILE
	rc=${PIPESTATUS[0]} ; check_return_value
    sudo /usr/bin/growisofs -speed=4 -Z $LOOP_DEVICE=${UDF_FILE} | tee -a $LOG_FILE
}

function verify_burn
{
    # function to check hash of each file
	echo ""
	# after verification delete temp UDF file
}

logger " * [STEP 1 of 6] Check if LOOP Device $LOOP_DEVICE is ready (does the bluray drive have media inside it?)"
check_loop_device
logger "" ; logger " * [STEP 2 of 6] Check if /data parittion is mounted"
check_data_mount
logger "" ; logger " * [STEP 3 of 6] Mount temporary UDF file (so we can copy backups files to it)"
udf_mount
logger "" ; logger " * [STEP 4 of 6] Copy latest backup files to UDF_MOUNT (searching for backups 0-7 days ago)"
copy_latest_backups
logger "" ; logger " * [STEP 5 of 6] Burn BACKUP!!"
udf_burn
#verify_burn