modify-gencache-tdb

#!/bin/sh

[ `id -u` != 0 ] && echo "Need root privileges" && exit

DOMAIN="DOMAIN"
DOMAINSID=`sudo net getdomainsid | grep $DOMAIN | awk '{ print $6 }'`
GID="513"
SID="${DOMAINSID}-${GID}"

SMB_TDB="smb.conf-tdb-backend"
SMB_AD="smb.conf-ad-backend"

TDBDUMP="/usr/bin/tdbdump"
TDBTOOL="/usr/bin/tdbtool"
GENCACHETDB="/var/cache/samba/gencache.tdb"

systemctl stop winbind
rm -f /var/{cache,lib}/samba/*.tdb

cd /etc/samba
cp $SMB_TDB smb.conf
systemctl start winbind
getent passwd > /tmp/getent-passwd-`date +%s`

systemctl stop winbind
cd  /var/cache/samba
KEY=`   $TDBDUMP $GENCACHETDB   |\
        tr '\n' ' '             |\
        sed 's/} /}\n/g'        |\
        grep $SID               |\
        grep GID2SID            |\
        cut -f2 -d\"            `

TIME=`  $TDBDUMP $GENCACHETDB   |\
        tr '\n' ' '             |\
        sed 's/} /}\n\g'        |\
        grep $SID               |\
        grep GID2SID            |\
        cut -f4 -d\"            |\
        cut -f1 -d/             |\
        awk '{ print $1 }'      `

$TDBTOOL $GENCACHETDB delete "$KEY"
$TDBTOOL $GENCACHETDB store "IDMAP/$SID\0" "  ${TIME}/${GID}:G\0"
$TDBTOOL $GENCACHETDB store "IDMAP/GID2SID/${GID}\0" "  ${TIME}/$SID\0"

cd /etc/samba
cp $SMB_AD smb.conf
systemctl start winbind
ls -l /home/$DOMAIN/ > /dev/null
getent passwd > /tmp/getent-passwd-`date +%s`