POSTMAP(1)                                             POSTMAP(1)
NAME
       postmap - Postfix lookup table management
SYNOPSIS
       postmap [-Nfinorvw] [-c config_dir] [-d key] [-q key]
       [file_type:]file_name ...
DESCRIPTION
       The postmap command creates or queries one or more Postfix
       lookup  tables,  or updates an existing one. The input and
       output file formats are expected to be compatible with:
           makemap file_type file_name < file_name
       If the result files do not exist they will be created with
       the  same  group  and other read permissions as the source
       file.
       While the table update is in progress, signal delivery  is
       postponed,  and  an exclusive, advisory, lock is placed on
       the entire table, in order to avoid surprises in spectator
       programs.
       The format of a lookup table input file is as follows:
       o      A table entry has the form
                   key whitespace value
       o      Empty  lines and whitespace-only lines are ignored,
              as are lines whose first  non-whitespace  character
              is a `#'.
       o      A  logical  line starts with non-whitespace text. A
              line that starts with whitespace continues a  logi-
              cal line.
       The  key  and  value are processed as is, except that sur-
       rounding white space is stripped off. Unlike with  Postfix
       alias  databases,  quotes cannot be used to protect lookup
       keys that  contain  special  characters  such  as  `#'  or
       whitespace. The key is mapped to lowercase to make mapping
       lookups case insensitive.
       Options:
       -N     Include the terminating null character that  termi-
              nates  lookup  keys and values. By default, Postfix
              does whatever is the default for the host operating
              system.
       -c config_dir
              Read  the  main.cf  configuration file in the named
              directory  instead  of  the  default  configuration
              directory.
       -d key Search  the  specified  maps for key and remove one
              entry per map.  The exit status is  zero  when  the
              requested information was found.
              If a key value of - is specified, the program reads
              key values from the standard input stream. The exit
              status  is  zero when at least one of the requested
              keys was found.
       -f     Do not fold the lookup key to lower case while cre-
              ating or querying a map.
       -i     Incremental  mode. Read entries from standard input
              and  do  not  truncate  an  existing  database.  By
              default,  postmap  creates  a new database from the
              entries in file_name.
       -n     Don't include the terminating null  character  that
              terminates  lookup  keys  and  values.  By default,
              Postfix does whatever is the default for  the  host
              operating system.
       -o     Do  not  release  root privileges when processing a
              non-root input file. By default, postmap drops root
              privileges  and  runs  as  the  source  file  owner
              instead.
       -q key Search the specified maps for  key  and  print  the
              first  value  found  on the standard output stream.
              The exit status is zero when the requested informa-
              tion was found.
              If a key value of - is specified, the program reads
              key values  from  the  standard  input  stream  and
              prints  one  line  of key value output for each key
              that was found. The exit status  is  zero  when  at
              least one of the requested keys was found.
       -r     When  updating a table, do not warn about duplicate
              entries; silently replace them.
       -v     Enable verbose logging for debugging purposes. Mul-
              tiple  -v  options  make  the software increasingly
              verbose.
       -w     When updating a table, do not warn about  duplicate
              entries; silently ignore them.
       Arguments:
       file_type
              The type of database to be produced.
              btree  The  output  file  is  a  btree  file, named
                     file_name.db.  This  is  available  only  on
                     systems with support for db databases.
              dbm    The  output  consists  of  two  files, named
                     file_name.pag and  file_name.dir.   This  is
                     available  only  on systems with support for
                     dbm databases.
              hash   The output file  is  a  hashed  file,  named
                     file_name.db.   This  is  available  only on
                     systems with support for db databases.
              Use the command postconf -m to find out what  types
              of  database your Postfix installation can support.
              When no file_type is specified, the  software  uses
              the     database    type    specified    via    the
              default_database_type configuration parameter.
       file_name
              The name of  the  lookup  table  source  file  when
              rebuilding a database.
DIAGNOSTICS
       Problems and transactions are logged to the standard error
       stream. No output means no problems. Duplicate entries are
       skipped and are flagged with a warning.
       postmap  terminates  with zero exit status in case of suc-
       cess (including successful postmap -q lookup)  and  termi-
       nates with non-zero exit status in case of failure.
ENVIRONMENT
       MAIL_CONFIG
              Directory with Postfix configuration files.
       MAIL_VERBOSE
              Enable verbose logging for debugging purposes.
CONFIGURATION PARAMETERS
       default_database_type
              Default  output  database  type.  On many UNIX sys-
              tems, the default database type is either  hash  or
              dbm.
       berkeley_db_create_buffer_size
              Amount  of buffer memory to be used when creating a
              Berkeley DB hash or btree lookup table.
       berkeley_db_read_buffer_size
              Amount of buffer memory to be used when  reading  a
              Berkeley DB hash or btree lookup table.
LICENSE
       The  Secure  Mailer  license must be distributed with this
       software.
AUTHOR(S)
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA
                                                       POSTMAP(1)