POSTMAP(1)                                                          POSTMAP(1)

NAME
       postmap - Postfix lookup table management SYNOPSIS
       postmap [-Nfinopruvw] [-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.  INPUT FILE FORMAT
       The format of a lookup table input file is as follows:

       ·      A table entry has the form

                   key whitespace value

       ·      Empty lines and whitespace-only lines are ignored, as are  lines
              whose first non-whitespace character is a `#'.

       ·      A  logical  line  starts  with  non-whitespace text. A line that
              starts with whitespace continues a logical line.

       The key and value are processed as is, except  that  surrounding  white
       space is stripped off. Unlike with Postfix alias databases, quotes can-
       not 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.  COMMAND-LINE ARGUMENTS

       -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 creating 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     Include the terminating null character  that  terminates  lookup
              keys  and  values.  By  default,  Postfix  does  whatever is the
              default for the host operating system.

       -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.

       -p     Do not inherit the file access permissions from the  input  file
              when  creating  a  new  file.   Instead,  create a new file with
              default access permissions (mode 0644).

       -q key Search the specified maps for key  and  write  the  first  value
              found  to  the  standard  output stream. 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 and writes 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.

       -u     Upgrade the database to the current version.

       -v     Enable verbose  logging  for  debugging  purposes.  Multiple  -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 database type. To find out what types are supported, use the
              "postconf -m" command.

              The  postmap  command  can query any supported file type, but it
              can create only the following file types:

              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 data-
              base.

DIAGNOSTICS
       Problems are logged to the standard error stream and to syslogd(8).  No
       output  means  that  no  problems  were detected. Duplicate entries are
       skipped and are flagged with a warning.

       postmap terminates with zero exit status in case of success  (including
       successful  postmap -q lookup) and terminates 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
              The following main.cf parameters are especially relevant to this
              program.  The text below provides only a parameter summary.  See
              postconf(5) for more details including examples.

       berkeley_db_create_buffer_size (16777216)
              The  per-table I/O buffer size for programs that create Berkeley
              DB hash or btree tables.

       berkeley_db_read_buffer_size (131072)
              The per-table I/O buffer size for programs that read Berkeley DB
              hash or btree tables.

       config_directory (see 'postconf -d' output)
              The  default  location of the Postfix main.cf and master.cf con-
              figuration files.

       default_database_type (see 'postconf -d' output)
              The default database type for use in newaliases(1), postalias(1)
              and postmap(1) commands.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (postfix)
              The  mail  system  name that is prepended to the process name in
              syslog records, so that "smtpd"  becomes,  for  example,  "post-
              fix/smtpd".   SEE  ALSO  postalias(1), create/update/query alias
              database postconf(1), supported database types postconf(5), con-
              figuration parameters syslogd(8), system logging README FILES
              locate this information.
              DATABASE_README, Postfix lookup table overview
              LICENSE
              The Secure Mailer license must be distributed  with  this  soft-
              ware.  AUTHOR(S) Wietse Venema IBM T.J. Watson Research P.O. Box
              704 Yorktown Heights, NY 10598, USA

                                                                    POSTMAP(1)