Index for Section 8

Alphabetical listing for M

makedbm(8)
NAME
  makedbm - Makes a Network Information Service (NIS) dbm file

SYNOPSIS
  /var/yp/makedbm [-i yp_input_file] [-s yp_secure_name]
   [-a method] [-o yp_output_name] [-d yp_domain_name]
   [-m yp_master_name] infile outfile
  /var/yp/makedbm [-u dbmfilename]

FLAGS
  -a method
      Specifies that NIS maps are to be stored in one of the following
      formats:

      b		btree - Recommended when creating and maintaining very large
		maps.

      d		dbm/ndbm - For backward compatibility. This is the default.

      h		hash - A potentially quicker method for managing small maps.

  -i  Creates a special entry with the key yp_input_file.

  -s  Creates a special entry with the key yp_secure_file.  This causes the
      makedbm command to write a secure map.  The key value ypserver looks
      for YP_SECURE.

  -o  Creates a special entry with the key yp_output_name.

  -d  Creates a special entry with the key yp_domain_name.

  -m  Creates a special entry with the key yp_master_name.  If no master host
      name is specified, yp_master_name will be set to the local host name.

  -u  Undoes a dbm file. That is, prints out a dbm file one entry per line,
      with a single space separating keys from values.

DESCRIPTION
  The makedbm command takes the file specified by the argument infile and
  converts it to a single file or a pair of files in dbm(3), btree(3), or
  hash(3) format. The dbm(3) files are stored as outfile.pag and outfile.dir.
  The btree(3) files are stored as outfile.btree.  Each line of the input
  file is converted to a single dbm record.  All characters up to the first
  tab or space form the key, and the rest of the line is defined as the key's
  associated data.  If a line ends with a backslash (\), the data for that
  record is continued onto the next line.  It is left for the Network
  Information Service (NIS) clients to interpret the number sign (#); makedbm
  does not treat it as a comment character.  The infile parameter can be a
  hyphen (-), in which case makedbm reads the standard input.

  The makedbm command is meant to be used in generating database files for
  NIS.	The makedbm command generates a special entry with the key
  yp_last_modified, which is the date of infile.



RESTRICTIONS
  You must use the same database format for each map in a domain. In
  addition, a server serving multiple NIS domains must use the same database
  format for all domains.

  Although a Digital UNIX NIS server that takes advantage of btree files will
  be able to store very large maps, NIS slave servers that lack this feature
  might have a much smaller limit on the number of map entries they can
  handle.  It may not be possible to distribute very large maps from a
  Digital UNIX NIS master server to a slave server that lacks support for
  very large maps.  NIS clients are not affected by these enhancements.

EXAMPLES
  The following example shows how a combination of commands can be used to
  make the NIS dbm files passwd.byname.pag and passwd.byname.dir from the
  /etc/passwd file.  The percent sign (%) signifies the system prompt.

       % awk 'BEGIN { FS = ":"; OFS = ""; }
	{ print $1, $0 }' /etc/passwd > ptmp
       % makedbm ptmp passwd.byname
       % rm ptmp

  The awk command creates the file ptmp which is in a form usable by makedbm.
  The makedbm command uses the ptmp file to create the database files. The rm
  command removes the ptmp file.

  The following is an example of the makedb command used with the btree
  format database routine to store NIS maps.

       makedbm -a b ...

RELATED INFORMATION
  Commands: yppasswd(1), ypmake(8).

  Functions:  btree(3), dbm(3), dbopen(3), hash(3), ndbm(3).