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POSTMAP(1)                                             POSTMAP(1)


NAME
       postmap - Postfix lookup table management

SYNOPSIS
       postmap [-Ninrvw] [-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

       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      Blank  lines  are  ignored.  So are lines beginning
              with `#'.

       o      A table entry has the form

                   key whitespace value

       o      A line that starts with  whitespace  continues  the
              preceding 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 non-zero if  the
              requested information was not found.




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POSTMAP(1)                                             POSTMAP(1)


       -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.

       -q key Search  the  specified  maps  for key and print the
              first value found on the  standard  output  stream.
              The exit status is non-zero if the requested infor-
              mation was not 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.

              When  no  file_type is specified, the software uses
              the database type specified via  the  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



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POSTMAP(1)                                             POSTMAP(1)


       skipped and are flagged with a warning.

BUGS
       The "delete key" support is limited to one  delete  opera-
       tion per command invocation.

ENVIRONMENT
       MAIL_CONFIG
              Directory with Postfix configuration files.

       MAIL_VERBOSE
              Enable verbose logging for debugging purposes.

CONFIGURATION PARAMETERS
       database_type
              Default  output  database  type.  On many UNIX sys-
              tems, the default database type is either  hash  or
              dbm.

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





























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