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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 $sshoptions -o PasswordAuthentication=no $host -l $user 'echo -n 1'"
+ local ret=`ssh $sshoptions -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 $sshoptions $host -l $user '$RDIFFBACKUP -V'"
+ echo `ssh $sshoptions $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
+}
+
+function check_cstream() {
+ local cstream=$1
+ if [ ! -x $cstream ]; then
+ fatal "Can't find your cstream binary (trying: $cstream). If you use bwlimit you must have cstream installed."
+ fi
+}
+
+### GET CONFIG ###
+
+getconf options
+getconf testconnect yes
+getconf nicelevel 0
+getconf bwlimit
+getconf ignore_version no
+
+setsection source
+getconf type; sourcetype=$type
+getconf user; sourceuser=$user
+getconf host; sourcehost=$host
+check_consistency "source" "$type" "$user" "$host"
+getconf label
+getconf keep 60
+getconf include
+getconf vsnames all
+getconf vsinclude
+getconf exclude
+
+setsection dest
+getconf directory; destdir=$directory
+# strip trailing /
+destdir=${destdir%/}
+getconf type; desttype=$type
+getconf user; destuser=$user
+getconf host; desthost=$host
+getconf sshoptions
+check_consistency "destination" "$type" "$user" "$host"
+
+if [ -n "$sshoptions" ] && echo $options | grep -qv "remote-schema"; then
+ options="$options --remote-schema 'ssh -C $sshoptions %s rdiff-backup --server'"
+fi
+
+### CHECK CONFIG ###
+
+# If vservers are configured, check that the ones listed in $vsnames do exist.
+local usevserver=no
+if [ $vservers_are_available = yes ]; then
+ if [ "$vsnames" = all ]; then
+ vsnames="$found_vservers"
+ else
+ if ! vservers_exist "$vsnames" ; then
+ fatal "At least one of the vservers listed in vsnames ($vsnames) does not exist."
+ fi
+ fi
+ if [ -n "$vsinclude" ]; then
+ info "Using vservers '$vsnames'"
+ usevserver=yes
+ fi
+else
+ [ -z "$vsinclude" ] || warning 'vservers support disabled in backupninja.conf, vsincludes configuration lines will be ignored'
+fi
+
+# check the connection at the source and destination
+[ -n "$test" ] || test=0
+if [ "$testconnect" = "yes" ] || [ "${test}" -eq 1 ]; then
+ test_connection $sourceuser $sourcehost
+ test_connection $destuser $desthost
+fi
+
+if [ "$ignore_version" != "yes" ]; then
+ # 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
+fi
+
+# source specific checks
+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 [ "$keep" != yes ]; then
+
+ if [ "`echo $keep | tr -d 0-9`" == "" ]; then
+ # add D if no other date unit is specified
+ keep="${keep}D"
+ fi
+
+ removestr="$RDIFFBACKUP $options --force --remove-older-than $keep "
+ if [ "$desttype" == "remote" ]; then
+ removestr="${removestr}${destuser}@${desthost}::"
+ fi
+ removestr="${removestr}${destdir}/${label}";
+
+ debug "$removestr"
+ if [ $test = 0 ]; then
+ output="`su -c "$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
+
+fi
+
+# Add cstream
+
+if [ ! -z $bwlimit ]; then
+ check_cstream $CSTREAM;
+ if [ "$desttype" = "remote" ]; then
+ RDIFFBACKUP="$RDIFFBACKUP --remote-schema 'cstream -t $bwlimit | ssh %s \''rdiff-backup --server\'''"
+ elif [ "$sourcetype" = "remote" ]; then
+ RDIFFBACKUP="$RDIFFBACKUP --remote-schema 'ssh %s \''rdiff-backup --server\'' | cstream -t $bwlimit'"
+ else
+ fatal "You specified a bandwidth limit but neither your source nor destination types are remote."
+ fi
+fi
+
+### EXECUTE ###
+
+execstr="$RDIFFBACKUP $options --print-statistics "
+
+set -o noglob
+
+symlinks_warning="Maybe you have mixed symlinks and '*' in this statement, which is not supported."
+
+# 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 $vsnames; do
+ for vi in $vsinclude; do
+ str="${vi//__star__/*}"
+ str="$VROOTDIR/$vserver$str"
+ if [ -n "$str" ]; then
+ execstr="${execstr}--include '$str' "
+ else
+ warning "vsinclude statement '${vi//__star__/*}' will be ignored for VServer $vserver. $symlinks_warning"
+ fi
+ done
+ done
+fi
+
+set +o noglob
+
+# exclude everything else
+[ "$include" != "" -o "$vsinclude" != "" ] && execstr="${execstr}--exclude '/*' "
+
+# include client-part and server-part
+execstr="${execstr}$execstr_sourcepart $execstr_destpart"
+
+debug "$execstr"
+if [ $test = 0 ]; 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