b475fd4d77
In case of making a backup to format the card and shoot new photos/videos, I need to be sure to have a valid backup. I check if there is enough space on storage to make the backup, else shutting down the Pi. User feedback in that case is not perfect, ACT led is turned off, it should exist a better way to warn the user.
81 lines
2.9 KiB
Bash
Executable File
81 lines
2.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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# IMPORTANT:
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# Run the install-little-backup-box.sh script first
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# to install the required packages and configure the system.
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# Specify devices and their mount points
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STORAGE_DEV="sda1"
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STORAGE_MOUNT_POINT="/media/storage"
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CARD_DEV="sdb1"
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CARD_MOUNT_POINT="/media/card"
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# Set the ACT LED to heartbeat
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sudo sh -c "echo heartbeat > /sys/class/leds/led0/trigger"
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# Wait for a USB storage device (e.g., a USB flash drive)
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STORAGE=$(ls /dev/* | grep $STORAGE_DEV | cut -d"/" -f3)
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while [ -z ${STORAGE} ]
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do
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sleep 1
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STORAGE=$(ls /dev/* | grep $STORAGE_DEV | cut -d"/" -f3)
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done
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# When the USB storage device is detected, mount it
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mount /dev/$STORAGE_DEV $STORAGE_MOUNT_POINT
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# Set the ACT LED to blink at 1000ms to indicate that the storage device has been mounted
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sudo sh -c "echo timer > /sys/class/leds/led0/trigger"
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sudo sh -c "echo 1000 > /sys/class/leds/led0/delay_on"
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# If there is a wpa_supplicant.conf file in the root of the storage device
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# Rename the original config file,
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# move wpa_supplicant.conf from the card to /etc/wpa_supplicant/
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# Reboot to enable networking
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if [ -f "$STORAGE_MOUNT_POINT/wpa_supplicant.conf" ]; then
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sudo sh -c "echo 100 > /sys/class/leds/led0/delay_on"
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mv /etc/wpa_supplicant/wpa_supplicant.conf /etc/wpa_supplicant/wpa_supplicant.conf.bak
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mv "$STORAGE_MOUNT_POINT/wpa_supplicant.conf" /etc/wpa_supplicant/wpa_supplicant.conf
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reboot
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fi
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# Wait for a card reader or a camera
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CARD_READER=$(ls /dev/* | grep $CARD_DEV | cut -d"/" -f3)
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until [ ! -z $CARD_READER ]
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do
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sleep 1
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CARD_READER=$(ls /dev/sd* | grep $CARD_DEV | cut -d"/" -f3)
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done
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# If the card reader is detected, mount it and obtain its UUID
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if [ ! -z $CARD_READER ]; then
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mount /dev/$CARD_DEV $CARD_MOUNT_POINT
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# # Set the ACT LED to blink at 500ms to indicate that the card has been mounted
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sudo sh -c "echo 500 > /sys/class/leds/led0/delay_on"
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# Create the CARD_ID file containing a random 8-digit identifier if doesn't exist
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if [ ! -f $CARD_MOUNT_POINT/CARD_ID ]; then
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< /dev/urandom tr -cd 0-9 | head -c 8 > $CARD_MOUNT_POINT/CARD_ID
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fi
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# Read the 8-digit identifier number from the CARD_ID file on the card
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# and use it as a directory name in the backup path
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read -r ID < $CARD_MOUNT_POINT/CARD_ID
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BACKUP_PATH=$STORAGE_MOUNT_POINT/"$ID"
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# Shutdown if there is not enough free space on storage
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STORAGEFREE=$(df -P /dev/sda1 | awk 'NR==2 {print $4}')
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TRANSFERTAMOUNT=$(($(rsync -an --stats $CARD_MOUNT_POINT/ $BACKUP_PATH | awk '/Total transferred file size:/ {print $5}' | sed 's/,//g') /1024 ))
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if (($STORAGEFREE < $TRANSFERTAMOUNT)); then
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sudo sh -c "echo 0 > /sys/class/leds/led0/brightness"
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shutdown -h now
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fi
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# Perform backup using rsync
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rsync -avh $CARD_MOUNT_POINT/ $BACKUP_PATH
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# Turn off the ACT LED to indicate that the backup is completed
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sudo sh -c "echo 0 > /sys/class/leds/led0/brightness"
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fi
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# Shutdown
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sync
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shutdown -h now
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