diff --git a/synchronize_users.pl b/synchronize_users.pl
index 76ef481ee36cc20357e388303cdeed61e914e553..4685de82a24601711e2f766fb0ae013d2f266652 100755
--- a/synchronize_users.pl
+++ b/synchronize_users.pl
@@ -12,9 +12,9 @@ use File::Basename;
 use Net::LDAP;
 
 use lib (
-  new Config::IniFiles(
-    -file => "/opt/etc/ini/global.ini"
-  )->val( 'APPLICATION', 'LIBRARY' )
+          new Config::IniFiles(
+                                -file => "/opt/etc/ini/global.ini"
+          )->val( 'APPLICATION', 'LIBRARY' )
 );
 
 use SNET::LdapNS qw(:all);
@@ -23,138 +23,110 @@ my $global_iniFile = new Config::IniFiles( -file => "/opt/etc/ini/global.ini" );
 my $ldap_iniFile = new Config::IniFiles( -file => $global_iniFile->val( 'INI', 'LDAP' ) );
 
 my $ldap_server = {
-  'uri' => $ldap_iniFile->val( 'LDAP_SNET', 'SERVER' ),
-  'base' => $ldap_iniFile->val( 'LDAP_SNET', 'BASE' ),
-  'user' => $ldap_iniFile->val( 'LDAP_CREDENTIALS', 'USER' ),
-  'password' => $ldap_iniFile->val( 'LDAP_CREDENTIALS', 'PASSWORD' ),
+                    'uri'      => $ldap_iniFile->val( 'LDAP_SNET',        'SERVER' ),
+                    'base'     => $ldap_iniFile->val( 'LDAP_SNET',        'BASE' ),
+                    'user'     => $ldap_iniFile->val( 'LDAP_CREDENTIALS', 'USER' ),
+                    'password' => $ldap_iniFile->val( 'LDAP_CREDENTIALS', 'PASSWORD' ),
 };
 
 my $ldap_server_ng = {
-  'uri' => $ldap_iniFile->val( 'LDAP_NG', 'SERVER' ),
-  'base' => $ldap_iniFile->val( 'LDAP_NG', 'BASE' ),
-  'user' => $ldap_iniFile->val( 'LDAP_NG_CREDENTIALS', 'USER' ),
-  'password' => $ldap_iniFile->val( 'LDAP_NG_CREDENTIALS', 'PASSWORD' ),
+                       'uri'      => $ldap_iniFile->val( 'LDAP_NG',             'SERVER' ),
+                       'base'     => $ldap_iniFile->val( 'LDAP_NG',             'BASE' ),
+                       'user'     => $ldap_iniFile->val( 'LDAP_NG_CREDENTIALS', 'USER' ),
+                       'password' => $ldap_iniFile->val( 'LDAP_NG_CREDENTIALS', 'PASSWORD' ),
 };
 
-sub synchronize($$) {
+sub synchronize($$)
+{
 
-  my ($cfrom, $cto) = @_;
+    my ( $cfrom, $cto ) = @_;
 
-  die 'missing parameters' unless (
-    (defined($cfrom) && defined($cto))
-    &&
-    (ref($cfrom) eq 'HASH')
-    &&
-    (ref($cto) eq 'HASH')
-  );
+    die 'missing parameters' unless (    ( defined( $cfrom ) && defined( $cto ) )
+                                      && ( ref( $cfrom ) eq 'HASH' )
+                                      && ( ref( $cto ) eq 'HASH' ) );
 
-  my $from = $cfrom->{'userInfos'};
-  my $to = $cto->{'userInfos'};
+    my $from = $cfrom->{'userInfos'};
+    my $to   = $cto->{'userInfos'};
 
-  die 'missing userInfos' unless (
-    defined($from)
-    &&
-    defined($to)
-  );
+    die 'missing userInfos' unless (    defined( $from )
+                                     && defined( $to ) );
 
+    while ( my ( $k, $v ) = each %{$from} ) {
 
-  while (my ($k, $v) = each %{$from}) {
+        my $uid = $cfrom->{'connection'}->clean_dn( $k );
+        my $dn  = 'uid=' . $uid . ',ou=People,' . $cto->{'base'};
 
-    my $uid = $cfrom->{'connection'}->clean_dn($k);
-    my $dn = 'uid='.$uid.',ou=People,'.$cto->{'base'};
+        if ( !defined( $to->{$dn} ) ) {
+            print STDERR "$0: [warning] user `$dn' not found\n";
+            next;
+        }
 
-    if (!defined($to->{$dn})) {
-      print STDERR "$0: [warning] user `$dn' not found\n";
-      next;
-    }
+        my $entry = Net::LDAP::Entry->new( $dn );
+        $entry->changetype( 'modify' );
+        my $changes = 0;
 
-    my $entry = Net::LDAP::Entry->new($dn);
-    $entry->changetype('modify');
-    my $changes = 0;
+        foreach my $attr ( 'userpassword', 'uidnumber' ) {
 
-    foreach my $attr ('userpassword', 'uidnumber') {
+            next unless (    defined( $v->{$attr} )
+                          && defined( $to->{$dn}->{$attr} ) );
 
-      next unless (
-        defined($v->{$attr})
-        &&
-        defined($to->{$dn}->{$attr})
-      );
-      
-      my $from_attr = ${$v->{$attr}}[0];
-      my $to_attr = ${$to->{$dn}->{$attr}}[0];
+            my $from_attr = ${ $v->{$attr} }[0];
+            my $to_attr   = ${ $to->{$dn}->{$attr} }[0];
 
-      if ($from_attr ne $to_attr) {
-        $changes++;
-        $entry->replace($attr => $from_attr);
-      }
+            if ( $from_attr ne $to_attr ) {
+                $changes++;
+                $entry->replace( $attr => $from_attr );
+            }
 
-    }
+        }
 
-    if ($changes > 0) {
-      my $result = $entry->update($cto->{'connection'}->{'connection'});
-      if ($result->is_error()) {
-        print STDERR "$0: [error] unable to synchronize $uid:".(
-          defined($result->error_desc) ? $result->error_desc : $result->error()
-        )."\n";
-      }
-      else {
-        print STDERR "$0: [success] $uid synchronized\n";
-      }
-    }
+        if ( $changes > 0 ) {
+            my $result = $entry->update( $cto->{'connection'}->{'connection'} );
+            if ( $result->is_error() ) {
+                print STDERR "$0: [error] unable to synchronize $uid:" . ( defined( $result->error_desc ) ? $result->error_desc : $result->error() ) . "\n";
+            } else {
+                print STDERR "$0: [success] $uid synchronized\n";
+            }
+        }
 
-  }
+    }
 
 }
 
-
 eval {
 
-  foreach my $server ($ldap_server, $ldap_server_ng) {
-    my $uri = $server->{'uri'};
-    die "invalid uri `$uri'" unless ($uri =~ m/^(?:ldap:\/\/)?([^:]+)(?::389)?$/i);
-    $server->{'server'} = $1;
-  }
-
-  SNET::LdapNS::ldapns_add_dn_exception($ldap_server->{'user'});
-  SNET::LdapNS::ldapns_bind(
-    $ldap_server->{'server'},
-    $ldap_server->{'user'},
-    $ldap_server->{'password'},
-    $ldap_server->{'uri'},
-    'LDAPISS',
-    0, 0, 0
-  );
-  $ldap_server->{'connection'} = SNET::LdapNS::get_connection($ldap_server->{'uri'});
-  $ldap_server->{'userInfos'} = $ldap_server->{'connection'}->search(
-    base => 'ou=People,'.$ldap_server->{'base'},
-    scope => 'sub',
-    filter => '(objectClass=posixAccount)',
-    attrs => ['uid', 'uidNumber', 'userPassword' ]
-  );
-  SNET::LdapNS::ldapns_del_dn_exception($ldap_server->{'user'});
-
-  SNET::LdapNS::ldapns_bind(
-    $ldap_server_ng->{'server'},
-    $ldap_server_ng->{'user'},
-    $ldap_server_ng->{'password'},
-    $ldap_server_ng->{'uri'},
-    'LDAPISS',
-    1, 0, 0
-  );
-  $ldap_server_ng->{'connection'} = SNET::LdapNS::get_connection($ldap_server_ng->{'uri'});
-  $ldap_server_ng->{'userInfos'} = $ldap_server_ng->{'connection'}->search(
-    base => 'ou=People,'.$ldap_server_ng->{'base'},
-    scope => 'sub',
-    filter => '(objectClass=posixAccount)',
-    attrs => ['uid', 'uidNumber', 'userPassword' ]
-  );
-
-  synchronize($ldap_server, $ldap_server_ng);
+    foreach my $server ( $ldap_server, $ldap_server_ng ) {
+        my $uri = $server->{'uri'};
+        die "invalid uri `$uri'" unless ( $uri =~ m/^(?:ldap:\/\/)?([^:]+)(?::389)?$/i );
+        $server->{'server'} = $1;
+    }
+
+    SNET::LdapNS::ldapns_add_dn_exception( $ldap_server->{'user'} );
+    SNET::LdapNS::ldapns_bind( $ldap_server->{'server'}, $ldap_server->{'user'}, $ldap_server->{'password'}, $ldap_server->{'uri'}, 'LDAPISS', 0, 0, 0 );
+    $ldap_server->{'connection'} = SNET::LdapNS::get_connection( $ldap_server->{'uri'} );
+    $ldap_server->{'userInfos'} = $ldap_server->{'connection'}->search(
+                                                                        base   => 'ou=People,' . $ldap_server->{'base'},
+                                                                        scope  => 'sub',
+                                                                        filter => '(objectClass=posixAccount)',
+                                                                        attrs  => [ 'uid', 'uidNumber', 'userPassword' ]
+    );
+    SNET::LdapNS::ldapns_del_dn_exception( $ldap_server->{'user'} );
+
+    SNET::LdapNS::ldapns_bind( $ldap_server_ng->{'server'}, $ldap_server_ng->{'user'}, $ldap_server_ng->{'password'}, $ldap_server_ng->{'uri'}, 'LDAPISS', 1, 0, 0 );
+    $ldap_server_ng->{'connection'} = SNET::LdapNS::get_connection( $ldap_server_ng->{'uri'} );
+    $ldap_server_ng->{'userInfos'} = $ldap_server_ng->{'connection'}->search(
+                                                                              base   => 'ou=People,' . $ldap_server_ng->{'base'},
+                                                                              scope  => 'sub',
+                                                                              filter => '(objectClass=posixAccount)',
+                                                                              attrs  => [ 'uid', 'uidNumber', 'userPassword' ]
+    );
+
+    synchronize( $ldap_server, $ldap_server_ng );
 
 };
-if ($@) {
-  print STDERR $@;
-  exit 1;
+if ( $@ ) {
+    print STDERR $@;
+    exit 1;
 }
 
 exit 0;