Aether/remote-backup

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#!/bin/bash
# File: HelloWorld.bash
#
# Description: This file exemplifies printing 'Hello world!' in bash.
#
# Package: AniNIX/HelloWorld
# Copyright: WTFPL
#
# Author: DarkFeather <ircs://aninix.net:6697/DarkFeather>
# Should only be done as root.
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if [ "$(whoami)" != "root" ]; then
echo Needs to be run as root.
exit 1;
fi
# Default the host to the Aether host in whatever domain this host lives in.
host="$1"
if [ -z "$host" ]; then
host=Aether
fi
# Default the path to /
path="$2"
if [ -z "$path" ]; then
path='/'
fi
# Try to contract the host
if (nmap --open -p 22 "$host" | grep -E '22/tcp\s+open' &>/dev/null); then
# Confirm with the user
printf "Are you sure you want to back everything up to %s?\n* Is the root password set and backup volume mounted on '/mnt'?\n* Do you have time for this backup to complete?\n* Does \`ssh-keyscan -D localhost\` on the server match this? `ssh-keyscan -D "$host" 2>/dev/null | grep 4\ 2`\nEnter YES in all capitals to continue..." "$host"
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read answer
if [ "$answer" != "YES" ]; then
echo User did not confirm.
exit 1;
else
rsync -aAXv --delete --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} "$path" root@"$host":/mnt"$path"
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status="$?"
echo rsync exited with status $status
exit $status
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fi
else
echo "Host is not responding in a timely fashion."
exit 1;
fi