Here is the script that I use. Like I said, saving the last month of backup images is likely a bit overboard, but it made for a quick script.
The use of tar vs rsync is really one of personal preference. Both will do the job. I like tar as I get nice small compressed backups and all the file structure (ownership, permissions, symbolic links, etc.) are preserved no matter the filesystem the backup is being stored onto. I believe rsync does the same with the proper switches.
Code:
#!/bin/sh
# Last modifed: August 9, 2023
USERNAME="**********"
PASSWORD="**********"
UNC="\\\\192.168.189.5\\users"
EXTDRIVE="/tmp/mnt/WDCloud"
BKDIR="/router/AX88UBackup"
DAY="$(date +%d)"
USBDRIVE="/tmp/mnt/$(nvram get usb_path_sda1_label)"
if ! [ -d $EXTDRIVE ]; then
mkdir -p $EXTDRIVE
chmod 777 $EXTDRIVE
fi
if ! mount | grep $EXTDRIVE > /dev/null 2>&1; then
modprobe md4 > /dev/null # Required now by some 388.x firmware for mounting remote drives
mount -t cifs $UNC $EXTDRIVE -o "vers=2.1,username=${USERNAME},password=${PASSWORD}"
sleep 5
fi
if [ -n "`mount | grep $EXTDRIVE`" ]; then
if ! [ -d "${EXTDRIVE}${BKDIR}" ]; then mkdir -p "${EXTDRIVE}${BKDIR}"; fi
if ! [ -d "${EXTDRIVE}${BKDIR}/${DAY}" ]; then mkdir -p "${EXTDRIVE}${BKDIR}/${DAY}"; fi
[ -f ${EXTDRIVE}${BKDIR}/${DAY}/jffs.tar* ] && rm ${EXTDRIVE}${BKDIR}/${DAY}/jffs.tar*
[ -f ${EXTDRIVE}${BKDIR}/${DAY}/USBDrive.tar* ] && rm ${EXTDRIVE}${BKDIR}/${DAY}/USBDrive.tar*
tar -czf ${EXTDRIVE}${BKDIR}/${DAY}/jffs.tar.gz -C /jffs . >/dev/null
logger "Script ImageUSB: Finished backing up jffs to ${EXTDRIVE}${BKDIR}/${DAY}/jffs.tar.gz"
tar -zcf ${EXTDRIVE}${BKDIR}/${DAY}/USBDrive.tar.gz -C $USBDRIVE . >/dev/null
logger "Script ImageUSB: Finished backing up USB Key to ${EXTDRIVE}${BKDIR}/${DAY}/USBDrive.tar.gz"
sleep 10
umount $EXTDRIVE
else
echo "Failed to run ImageUSB script as mount failed"
fi
Then in my services-start script, I have an entry as follows;
cru a SyncUsbToNas "0 3 * * * /jffs/addons/young/ImageUSB >/dev/null 2>&1"
Hope you find this useful...
Cheers
