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    Command:

    postmap

    
    
    

    SYNOPSIS

           postmap [-Nbfhimnoprsvw] [-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 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
    
                       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.
    
           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  $number
           substitutions.
    
    
    

    COMMAND-LINE ARGUMENTS

           -b     Enable  message  body  query mode. When reading lookup keys from
                  standard input with "-q -", 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 -b option starts generating lookup keys  at  the
                  first  non-header line, and stops when the end of the message is
    
                  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 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.
    
           -h     Enable  message header query mode. When reading lookup keys from
                  standard input with "-q -", 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 -h option generates lookup keys until the first
                  non-header line is reached.  To simulate  header_checks(5)  pro-
                  cessing,  enable  MIME parsing with -m. With this, the -h 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.
    
           -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.
    
           -m     Enable MIME parsing with "-b" and "-h".
    
                  This feature is available in Postfix version 2.6 and later.
    
           -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
    
                  This feature is available in Postfix version 2.2 and later,  and
                  is not available for all database types.
    
           -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.
    
           conf(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 (see 'postconf -d' output)
                  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), 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)
    
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