NAME

       regex - libnfsidmap plugin using regex based mapping

SYNOPSIS

       Plugin for libnfsidmap.  Uses regex to map NFSv4 names to and from ids.

DESCRIPTION

       The regex plugin parses NFSv4 user and groups names using regex to extract the local user or group. NFSv4
       names are created by adding constant strings before and after the local user and group names.

       It additionally supports an additional configuration file for static group mappings.

CONFIGURATION

       The  configuration  for the plugin is in a new [Regex] section in /etc/idmapd.conf that may contain lines
       of the form

         variable = value

       The recognized variables are as follows:

   [Regex] section variables
       User-Regex
              Regular expression that extracts the local user name from an NFSv4 name. Several  expressions  can
              be concatenated with '|'. The first match will be used.

       Group-Regex
              Regular  expression that extracts the local group name from an NFSv4 name. Several expressions can
              be concatenated with '|'. The first match will be used.

       Prepend-Before-User
              Constant string to put before a local user name when building an NFSv4 name.

              (Default: none)

       Append-After-User
              Constant string to put after a local user name when building an NFSv4 name.

              (Default: none)

       Prepend-Before-Group
              Constant string to put before a local group name when building an NFSv4 name.

              (Default: none)

       Append-After-Group
              Constant string to put before a local group name when building an NFSv4 name.

              (Default: none)

       Group-Name-Prefix
              Constant string that is prepended to a local group name when converting it to an NFSv4 name. If an
              NFSv4 group name has this prefix it is removed when converting it to a local group  name.  IS  not
              applied if a static group mapping matches.

              This  allows  to  organize  the group name space in a central directory that is used for a central
              NFS4 server and use short group names in the local directory used in organizational units.

       Group-Name-No-Prefix-Regex
              Regular expression to exclude groups from adding and removing the prefix set by Group-Name-Prefix.
              The regular expression must match both the remote and local group names.

              (Default: none)

       Group-Map-File
              File name of an INI style file containing static group mappings.

              (Default: /etc/idmapd.conf)

       Group-Map-Section
              Section in the static group mapping file that contains the mappings. The name must  be  all  lower
              case. The section name in the file is case sensitive.

              (Default: groups)

STATIC MAPPING

       The Group-Map-File and Group-Map-Section variables can be used to define a section containing mappings of
       the form

         nfs4 group = local group

       The default is to have a [Groups] section in the /etc/idmapd.conf file.

       For both the NFS4 and local group name the Group-Name-Prefix prefix is not applied or removed.

EXAMPLES

       An example [Regex] and [Groups] section in the /etc/idmapd.conf file:

       [Regex]
       User-Regex = ^EXAMPLE\([^@]+)@EXAMPLE.ORG$
       Group-Regex = ^([^@]+)@EXAMPLE.ORG@EXAMPLE.ORG$|^EXAMPLE\([^@]+)@EXAMPLE.ORG$
       Prepend-Before-User = EXAMPLE
       Append-After-User = @EXAMPLE.ORG
       #Prepend-Before-Group =
       Append-After-Group = @example.org@example.org
       Group-Name-Prefix = sales-
       Group-Name-No-Prefix-Regex = -group$

       [Groups]
       domain users = users

SEE ALSO

       idmapd.conf(5)

BUGS

       Report bugs to <stefan.walter@inf.ethz.ch>

                                                   29 May 2017                              libnfsidmap-regex(5)