Simplify ldap restore hook

data/hooks/restore/05-conf_ldap

@@ -1,15 +1,8 @@
+#!/bin/bash
+
 backup_dir="${1}/conf/ldap"
 
-if [[ $EUID -ne 0 ]]; then
-
-    # We need to execute this script as root, since the ldap
-    # service will be shut down during the operation (and sudo
-    # won't be available)
-    /bin/bash $(readlink -f $0) $1
-
-else
-
-    service slapd stop || true
+systemctl stop slapd
 
 # Create a directory for backup
 TMPDIR="/tmp/$(date +%s)"
@@ -28,7 +21,7 @@ else
           mv "${TMPDIR}/ldap" /var/lib/ldap)
     chown -R openldap: /etc/ldap/slapd.d /var/lib/ldap
 
-        service slapd start
+    systemctl start slapd
     rm -rf "$TMPDIR"
 
     # Print an error message and exit
@@ -42,7 +35,8 @@ else
 cp -a "${backup_dir}/ldap.conf" /etc/ldap/ldap.conf
 cp -a "${backup_dir}/slapd.ldif" /etc/ldap/slapd.ldif
 # Legacy thing but we need it to force the regen-conf in case of it exist
-    cp -a "${backup_dir}/slapd.conf" /etc/ldap/slapd.conf
+[ ! -e "${backup_dir}/slapd.conf" ] \
+    || cp -a "${backup_dir}/slapd.conf" /etc/ldap/slapd.conf
 slapadd -F /etc/ldap/slapd.d -b cn=config \
     -l "${backup_dir}/cn=config.master.ldif" \
   || die 1 "Unable to restore LDAP configuration"
@@ -58,4 +52,3 @@ else
 
 service slapd start
 rm -rf "$TMPDIR"
-fi