POSTMAP(1)						      General Commands Manual							POSTMAP(1)

NAME

       postmap - Postfix lookup table management

SYNOPSIS

       postmap [-Nfinrvw] [-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 logical line.

       The  key  and  value  are processed as is, except that surrounding 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 terminates 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 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 data-
	      base 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 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 prints one line of key value  out-
	      put 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. 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 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  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 sta-
       tus in case of failure.

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 systems, 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

																	POSTMAP(1)