NAME

postmap - Postfix lookup table management

SYNOPSIS



ppoossttmmaapp [--NNbbffhhiimmnnoopprrssvvww] [--cc _c_o_n_f_i_g___d_i_r]
[--dd _k_e_y] [--qq _k_e_y]
        [_f_i_l_e___t_y_p_e:]_f_i_l_e___n_a_m_e ...

DESCRIPTION

The ppoossttmmaapp(1) 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:


    mmaakkeemmaapp _f_i_l_e___t_y_p_e _f_i_l_e___n_a_m_e < _f_i_l_e___n_a_m_e

If the result files do not exist they will be created with the same group and other read permissions as their 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 processes.

INPUT FILE FORMAT



The format of a lookup table input file is as follows:
· A table entry has the form



     _k_e_y whitespace _v_a_l_u_e
· 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 _k_e_y and _v_a_l_u_e 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.

By default the lookup key is mapped to lowercase to make the lookups case insensitive; as of Postfix 2.3 this case folding happens only with tables whose lookup keys are fixed-case strings such as btree:, dbm: or hash:. With earlier versions, the lookup key is folded even with tables where a lookup field can match both upper and lower case text, such as regexp: and pcre:. This resulted in loss of information with $_n_u_m_b_e_r substitutions.

COMMAND-LINE ARGUMENTS



--bb Enable message body query mode. When reading lookup keys
from standard input with "--qq --", process the input as if it is an email message in RFC 2822 format. Each line of body content becomes one lookup key.

By default, the --bb option starts generating lookup keys at the first non-header line, and stops when the end of the message is reached. To simulate bbooddyy__cchheecckkss(5) processing, enable MIME parsing with --mm. With this, the --bb option generates no body-style lookup keys for attachment MIME headers and for attached message/* headers.

This feature is available in Postfix version 2.6 and later.
--cc _c_o_n_f_i_g___d_i_r Read the mmaaiinn..ccff configuration file in the named directory
instead of the default configuration directory.
--dd _k_e_y Search the specified maps for _k_e_y 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.

--ff Do not fold the lookup key to lower case while creating or querying
a table.

With Postfix version 2.3 and later, this option has no effect for regular expression tables. There, case folding is controlled by appending a flag to a pattern.

--hh Enable message header query mode. When reading lookup keys
from standard input with "--qq --", process the input as if it is an email message in RFC 2822 format. Each logical header line becomes one lookup key. A multi-line header becomes one lookup key with one or more embedded newline characters.

By default, the --hh option generates lookup keys until the first non-header line is reached. To simulate hheeaaddeerr__cchheecckkss(5) processing, enable MIME parsing with --mm. With this, the --hh option also generates header-style lookup keys for attachment MIME headers and for attached message/* headers.

This feature is available in Postfix version 2.6 and later.
--ii Incremental mode. Read entries from standard input and do not
truncate an existing database. By default, ppoossttmmaapp(1) creates a new database from the entries in ffiillee__nnaammee.
--mm Enable MIME parsing with "--bb" and "--hh".


This feature is available in Postfix version 2.6 and later.
--NN Include the terminating null character that terminates lookup keys
and values. By default, ppoossttmmaapp(1) does whatever is the default for the host operating system.
--nn Don't include the terminating null character that terminates lookup
keys and values. By default, ppoossttmmaapp(1) does whatever is the default for the host operating system.
--oo Do not release root privileges when processing a non-root
input file. By default, ppoossttmmaapp(1) drops root privileges and runs as the source file owner instead.
--pp 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).
--qq _k_e_y Search the specified maps for _k_e_y 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 _k_e_y _v_a_l_u_e output for each key that was found. The exit status is zero when at least one of the requested keys was found.

--rr When updating a table, do not complain about attempts to update
existing entries, and make those updates anyway.
--ss Retrieve all database elements, and write one line of
_k_e_y _v_a_l_u_e output for each element. The elements are printed in database order, which is not necessarily the same as the original input order.

This feature is available in Postfix version 2.2 and later, and is not available for all database types.
--vv Enable verbose logging for debugging purposes. Multiple --vv
options make the software increasingly verbose.
--ww When updating a table, do not complain about attempts to update
existing entries, and ignore those attempts.

Arguments:

_f_i_l_e___t_y_p_e The database type. To find out what types are supported, use
the "ppoossttccoonnff --mm" command.

The ppoossttmmaapp(1) command can query any supported file type, but it can create only the following file types:

bbttrreeee The output file is a btree file, named _f_i_l_e___n_a_m_e..ddbb.
This is available on systems with support for ddbb databases.
ccddbb The output consists of one file, named _f_i_l_e___n_a_m_e..ccddbb.
This is available on systems with support for ccddbb databases.
ddbbmm The output consists of two files, named _f_i_l_e___n_a_m_e..ppaagg and
_f_i_l_e___n_a_m_e..ddiirr. This is available on systems with support for ddbbmm databases.
hhaasshh The output file is a hashed file, named _f_i_l_e___n_a_m_e..ddbb.
This is available on systems with support for ddbb databases.
ssddbbmm The output consists of two files, named _f_i_l_e___n_a_m_e..ppaagg and
_f_i_l_e___n_a_m_e..ddiirr. This is available on systems with support for ssddbbmm databases.

When no _f_i_l_e___t_y_p_e is specified, the software uses the database type specified via the ddeeffaauulltt__ddaattaabbaassee__ttyyppee configuration parameter.

_f_i_l_e___n_a_m_e The name of the lookup table source file when rebuilding a database.

DIAGNOSTICS

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

ppoossttmmaapp(1) terminates with zero exit status in case of success (including successful "ppoossttmmaapp --qq" lookup) and terminates with non-zero exit status in case of failure.

ENVIRONMENT



MMAAIILL__CCOONNFFIIGG Directory with Postfix configuration files.
MMAAIILL__VVEERRBBOOSSEE Enable verbose logging for debugging purposes.

CONFIGURATION PARAMETERS



The following mmaaiinn..ccff parameters are especially relevant to
this program.
The text below provides only a parameter summary. See
ppoossttccoonnff(5) for more details including examples.
bbeerrkkeelleeyy__ddbb__ccrreeaattee__bbuuffffeerr__ssiizzee ((1166777777221166)) The per-table I/O buffer size for programs that create Berkeley DB
hash or btree tables.
bbeerrkkeelleeyy__ddbb__rreeaadd__bbuuffffeerr__ssiizzee ((113311007722)) The per-table I/O buffer size for programs that read Berkeley DB
hash or btree tables.
ccoonnffiigg__ddiirreeccttoorryy ((sseeee ''ppoossttccoonnff --dd'' oouuttppuutt)) The default location of the Postfix main.cf and master.cf
configuration files.
ddeeffaauulltt__ddaattaabbaassee__ttyyppee ((sseeee ''ppoossttccoonnff --dd'' oouuttppuutt)) The default database type for use in nneewwaalliiaasseess(1), ppoossttaalliiaass(1)
and ppoossttmmaapp(1) commands.
ssyysslloogg__ffaacciilliittyy ((mmaaiill)) The syslog facility of Postfix logging.
ssyysslloogg__nnaammee ((sseeee ''ppoossttccoonnff --dd'' oouuttppuutt)) The mail system name that is prepended to the process name in syslog
records, so that "smtpd" becomes, for example, "postfix/smtpd".

SEE ALSO


postalias(1), create/update/query alias database
postconf(1), supported database types
postconf(5), configuration parameters
syslogd(8), system logging

README FILES



Use "ppoossttccoonnff rreeaaddmmee__ddiirreeccttoorryy" or
"ppoossttccoonnff hhttmmll__ddiirreeccttoorryy" to locate this information.

DATABASE_README, Postfix lookup table overview

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