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# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
#
# rdiff-backup handler script for backupninja
# requires rdiff-backup
#
### FUNCTIONS ###
function test_connection() {
# given a user and host,
# tests the connection.
# if user or host is missing, returns 0
# (ie, assume it's a local connection).
if [ $# -lt 2 ]; then
debug "(local is assumed to be a good connection)"
return 0
fi
local user=$1
local host=$2
debug "ssh -o PasswordAuthentication=no $host -l $user 'echo -n 1'"
local ret=`ssh -o PasswordAuthentication=no $host -l $user 'echo -n host is alive'`
if echo $ret | grep "host is alive"; then
debug "Connected to $host as $user successfully"
else
fatal "Can't connect to $host as $user."
fi
}
function get_version() {
# given no arguments, returns the local version.
# given a user and host, returns the remote version.
# if user or host is missing, returns the local version.
if [ "$#" -lt 2 ]; then
debug "$RDIFFBACKUP -V"
echo `$RDIFFBACKUP -V`
else
local user=$1
local host=$2
debug "ssh $host -l $user '$RDIFFBACKUP -V'"
echo `ssh $host -l $user "$RDIFFBACKUP -V | grep rdiff-backup"`
fi
}
function check_consistency() {
local section=$1
local type=$2
local user=$3
local host=$4
if [ "$type" == "local" ]; then
if [ "$user" != "" ]; then
warning "User should not be specified for local $section."
fi
if [ "$host" != "" ]; then
warning "Host should not be specified for local $section."
fi
fi
if [ "$type" == "remote" ]; then
if [ "$user" == "" ]; then
fatal "User must be specified for remote $section."
fi
if [ "host" == "" ]; then
fatal "Host must be specifed for remote $section."
fi
fi
}
### GET CONFIG ###
getconf options
getconf testconnect yes
getconf nicelevel 0
setsection source
getconf type; sourcetype=$type
getconf user; sourceuser=$user
getconf host; sourcehost=$host
check_consistency "source" "$type" "$user" "$host"
getconf label
getconf keep 60
getconf include
getconf vsinclude
getconf exclude
setsection dest
getconf directory; destdir=$directory
# strip trailing /
destdir=${destdir%/}
getconf type; desttype=$type
getconf user; destuser=$user
getconf host; desthost=$host
check_consistency "destination" "$type" "$user" "$host"
### CHECK CONFIG ###
# See if vservers are configured
local usevserver=no
if [ $vservers_are_available = yes -a -n "$vsinclude" ]; then
info "vserver method enabled"
usevserver=yes
fi
# check the connection at the source and destination
if [ "$testconnect" = "yes" ] || [ "${test}" -eq 1 ]; then
test_connection $sourceuser $sourcehost
test_connection $destuser $desthost
fi
# see that rdiff-backup has the same version at the source and destination
sourceversion=`get_version $sourceuser $sourcehost`
destversion=`get_version $destuser $desthost`
if [ "$sourceversion" != "$destversion" ]; then
fatal "rdiff-backup does not have the same version at the source and at the destination."
fi
# source specific checks
[ "$include" != "" -o "$vsinclude" != "" ] || fatal "No source includes specified"
#TODO should I test for vsinclude if usevservers=yes?
case $sourcetype in
remote ) execstr_sourcepart="$sourceuser@$sourcehost::/" ;;
local ) execstr_sourcepart="/" ;;
* ) fatal "sourcetype '$sourcetype' is neither local nor remote" ;;
esac
# destination specific checks
[ "$destdir" != "" ] || fatal "Destination directory not set"
case $desttype in
remote ) execstr_destpart="$destuser@$desthost::$destdir/$label" ;;
local ) execstr_destpart="$destdir/$label" ;;
* ) fatal "desttype '$desttype' is neither local nor remote" ;;
esac
### REMOVE OLD BACKUPS ###
if [ "`echo $keep | tr -d 0-9`" == "" ]; then
# add D if no other date unit is specified
keep="${keep}D"
fi
removestr="$RDIFFBACKUP --force --remove-older-than $keep "
if [ "$desttype" == "remote" ]; then
removestr="${removestr}${destuser}@${desthost}::"
fi
removestr="${removestr}${destdir}/${label}";
debug "$removestr"
if [ ! $test ]; then
output=`$removestr 2>&1`
if [ $? = 0 ]; then
debug $output
info "Removing backups older than $keep days succeeded."
else
warning $output
warning "Failed removing backups older than $keep."
fi
fi
### EXECUTE ###
execstr="$RDIFFBACKUP $options --print-statistics "
# TODO: order the includes and excludes
# excludes
for i in "$exclude"; do
str="${i//__star__/*}"
execstr="${execstr}--exclude '$str' "
done
# includes
for i in "$include"; do
[ "$i" != "/" ] || fatal "Sorry, you cannot use 'include = /'"
str="${i//__star__/*}"
execstr="${execstr}--include '$str' "
done
# vsinclude
if [ $usevserver = yes ]; then
for vserver in `ls $VROOTDIR|grep -v lost+found`; do
for vi in "$vsinclude"; do
str="${vi//__star__/*}"
execstr="${execstr}--include '$VROOTDIR/$vserver$str' "
done
done
fi
# exclude everything else
execstr="${execstr}--exclude '/*' "
# include client-part and server-part
execstr="${execstr}$execstr_sourcepart $execstr_destpart"
debug "$execstr"
if [ ! $test ]; then
output=`nice -n $nicelevel su -c "$execstr" 2>&1`
if [ $? = 0 ]; then
debug $output
info "Successfully finished backing up source $label"
else
warning $output
warning "Failed backup up source $label"
fi
fi
return 0
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