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#!/bin/bash -e
#
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# copy_crashplan_id - shell scripts to copy the connection key from a remote
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# (e.g. headless) Crashplan instance and setup the local
# machine's Crashplan client to connect to it using port
# forwarding over an open SSH connection. See also https://support.code42.com/CrashPlan/4/Configuring/Using_CrashPlan_On_A_Headless_Computer
#
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# Version 1.1, latest version at: https://gitlab.lindenaar.net/scripts/crashplan
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#
# Copyright (c) 2016 Frederik Lindenaar
#
# This script is free software: you can redistribute and/or modify it under the
# terms of version 3 of the GNU General Public License as published by the Free
# Software Foundation, or (at your option) any later version of the license.
#
# This script is distributed in the hope that it will be useful but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, visit <http://www.gnu.org/licenses/> to download it.
### Configuration ###
HOST= # name of machine runnig crashplan
USER= # userid to use to login to machine
# Leave blank for current user
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SRC_SYSTEM=Linux # either Linux, Darwin, osx or detect
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# Autodetects if blank (ssh conn, slow!)
### Implementation ###
# default settings, no need to change
PORT=4244
ADDR=127.0.0.1
# Support function to send an error message to STDERR and exit with status 1
die() { echo "Error: $*" >&2; exit 1; }
# Support function to determine destination location of .ui_info
# parameters: $1 - name of file (for error msg) $2 os (output of `uname -s`)
# based on https://support.code42.com/CrashPlan/4/Configuring/Using_CrashPlan_On_A_Headless_Computer#Locations_Of_.ui_info
file_location() {
case $2 in
OSX|osx|[Dd]arwin)
if [ -d "~/Library/Application Support/CrashPlan" ]; then
echo "~/Library/Application Support/CrashPlan/.ui_info"
else
echo "/Library/Application Support/CrashPlan/.ui_info"
fi
;;
[Ll]inux)
echo "/var/lib/crashplan/.ui_info"
;;
*) die "$1 os $2 is not supported"
esac
}
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myname=`basename "$0" .sh`
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# determine the connection parameters based on command line and configuration
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if [ $# -gt 2 -o "$1" == "-h" -o "$1" == "--help" -o $# -eq 0 -a -z "$HOST" ]; then
cat<<EOH
usage: $myname [user@]hostname [linux|osx|detect]${HOST:+"
or just $myname to copy from $HOST"}
Copy the connection key from a remote (e.g. headless) Crashplan instance and
setup the Crashplan client on local machine to connect to it using SSH port
forwarding (enable with ssh -L $PORT:$ADDR:4243 <name of Crashplan server>)
See also https://support.code42.com/CrashPlan/4/Configuring/Using_CrashPlan_On_A_Headless_Computer
EOH
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exit 2
elif [ $# -gt 0 ]; then
conn=$1
HOST=`echo $conn | cut -d\@ -f 2 -`
SRC_SYSTEM=${2:-$SRC_SYSTEM}
else
conn=${USER:+$USER@}$HOST
fi
# ensure the host is reachable
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if ping -c 1 $HOST > /dev/null 2>&1; then
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echo "copying Crashplan connect key from $HOST"
else
die "unable to reach host $HOST"
fi
# check if sudo is needed and available, prompt for password now if required
if [ -w "$dst" ]; then
sudo=
else
sudo=`which sudo || true`
if [ -z "$sudo" ]; then
die "no write access to $dst and sudo not available"
fi
$sudo -p "Need root access to update $dst
Please enter your password for sudo: " -v
fi
# determine the src and dst files
os=`uname -s`
if [ -z "$SRC_SYSTEM" -o "$SRC_SYSTEM" == detect ]; then
echo autodetecting OS type for $HOST
SRC_SYSTEM=`ssh $conn uname -s`
fi
src=`file_location source "$SRC_SYSTEM"`
dst=`file_location destination "$os"`
# use script name to generate a temp file name, ensure the temp file is removed
tmpfile=`mktemp -t "$myname"`
trap 'rm -f "$tmpfile"' 0
# retrieve the key from the host and generate the new .ui_info file
if scp -q "$conn:$src" "$tmpfile"; then
key=`cut -d, -f2 "$tmpfile"`
echo "$PORT,$key,$ADDR" > "$tmpfile"
else
die "unable to copy $src from $HOST"
fi
# check if the file is different, and if so put it in place
if $sudo cmp -s "$tmpfile" "$dst"; then
echo "no update needed, $dst up to date"
elif $sudo install -C -b -m 0644 "$tmpfile" "$dst"; then
echo "$dst updated for $HOST"
else
die "$dst could not be updated"
fi
echo "Connect with: ssh -L $PORT:$ADDR:4243 $conn"
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