49 lines
1.3 KiB
Bash
Executable file
49 lines
1.3 KiB
Bash
Executable file
#!/bin/bash
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read -p "Drive to backup: " DRIVE_TO_BACKUP
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read -p "Location of backup: " BACKUP_LOCATION
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DEVICE_NAME=$(basename $DRIVE_TO_BACKUP)
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# Create empty dir
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empty_dir=$(mktemp -d)
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BACKUP_LOCATION="${BACKUP_LOCATION}-$(date +'%Y-%m-%d').sqsh"
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CHECKSUM_FILE="$DEVICE_NAME.img.cksum"
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echo Backup: $DRIVE_TO_BACKUP
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echo To: $BACKUP_LOCATION
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mksquashfs $empty_dir $BACKUP_LOCATION -p "$DEVICE_NAME.img f 444 root root dd if=$DRIVE_TO_BACKUP bs=4M" -p "$CHECKSUM_FILE f 444 root root dd if=$DRIVE_TO_BACKUP | cksum"
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# Check Backup integrity by mounting and recalculating checksum from img and dev and compare to .img .img.cksum dev
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echo
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echo Checking Backup integrity ...
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echo
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BACKUP_MNT=$(mktemp -d)
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mount -o ro $BACKUP_LOCATION $BACKUP_MNT
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# Recalculate checksums
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DRIVE_CKSUM=$(dd if=$DRIVE_TO_BACKUP | cksum)
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# Compare checksums
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diff <(echo $DRIVE_CKSUM) <(cat $BACKUP_MNT/$CHECKSUM_FILE)
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if [ $? -ne 0 ]; then
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echo -e "\e[1;41m Backup not consistent! \e[0m"
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exit 1
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fi
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# Recalculate checksums
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IMG_CKSUM=$(dd if=$BACKUP_MNT/$DEVICE_NAME.img | cksum)
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# Compare checksums
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diff <(echo $IMG_CKSUM) <(cat $BACKUP_MNT/$CHECKSUM_FILE)
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if [ $? -ne 0 ]; then
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echo -e "\e[1;41m Backup not consistent! \e[0m"
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exit 1
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fi
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umount $BACKUP_LOCATION
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echo -e "\e[1;42m Backup complete \e[0m"
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