Provided by: postfix_2.2.10-1_i386 bug

NAME

       postmap - Postfix lookup table management

SYNOPSIS

       postmap [-Nfinoprsuvw] [-c config_dir] [-d key] [-q key]
               [file_type:]file_name ...

DESCRIPTION

       The  postmap(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:

           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
       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.

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(1) creates a
              new database from the entries in file_name.

       -N     Include the terminating null character  that  terminates  lookup
              keys  and  values.  By  default, postmap(1) 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, postmap(1) 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(1) 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 complain about attempts to update
              existing entries, and make those updates anyway.

       -s     Retrieve all database elements, and write one line of key  value
              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.

       -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 complain about attempts to update
              existing entries, and ignore those attempts.

       Arguments:

       file_type
              The database type. To find out what types are supported, use the
              "postconf -m" command.

              The postmap(1) 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  on  systems  with  support  for  db
                     databases.

              cdb    The output consists of  one  file,  named  file_name.cdb.
                     This  is  available  on  systems  with  support  for  cdb
                     databases.

              dbm    The output consists of two files, named file_name.pag and
                     file_name.dir.  This is available on systems with support
                     for dbm databases.

              hash   The output file is a  hashed  file,  named  file_name.db.
                     This   is  available  on  systems  with  support  for  db
                     databases.

              sdbm   The output consists of two files, named file_name.pag and
                     file_name.dir.  This is available on systems with support
                     for sdbm databases.

              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
              database.

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(1)  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 (seepostconf -doutput)
              The  default  location  of  the  Postfix  main.cf  and master.cf
              configuration files.

       default_database_type (seepostconf -doutput)
              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,
              "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  "postconf readme_directory" or "postconf html_directory" 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

                                                                    POSTMAP(1)