Postfix Overview - Introduction - SCN Research

POSTMAP(1)
POSTMAP(1)
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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
o
Blank lines are ignored. So are lines beginning
with `#'.
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 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.
-i Incremental mode. Read entries from standard input
and do not truncate an existing database. By
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6/26/01