YP_MKDB(8)              FreeBSD System Manager's Manual             YP_MKDB(8)

NAME
     yp_mkdb - generate the NIS databases

SYNOPSIS
     yp_mkdb -c
     yp_mkdb -u dbname
     yp_mkdb [-c] [-b] [-s] [-f] [-i inputfile] [-o outputfile]
             [-d domainname] [-m mastername] inputfile dbname

DESCRIPTION
     The yp_mkdb utility creates db(3) style databases for use with FreeBSD's
     NIS server.  The yp_mkdb utility reads data from inputfile, and writes it
     to dbname in db(3) format (using the hash table method).  The input
     should be in 'key data' format, which is to say two fields of ASCII data
     separated by white space.  The first field is assumed to be the key, and
     everything else is assumed to be the data.  These databases are typically
     stored in /var/yp/[domainname] where domainname is the name of the NIS
     domain being served.  The yp_mkdb utility is usually invoked by
     /var/yp/Makefile.  The yp_mkdb utility can also be used to dump an NIS
     database file so that its contents can be examined.  For security
     reasons, all databases that yp_mkdb creates are readable and writable by
     owner only (and usually the owner is root).

     The following options are available:

     -c      Cause yp_mkdb to send a YPPROC_CLEAR request to ypserv(8) on the
             local host.  This signal tells the server to close any open
             database descriptors and flush out its database cache.  If used
             alone, this flag signals the server and does nothing else.  If
             used as part of a database creation command, yp_mkdb will send
             the signal only after the new database has been successfully
             created.

     -b      Cause yp_mkdb to add a special entry to the database with a key
             of YP_INTERDOMAIN and an empty data field.  If this key is
             present in a map, it alters the behavior of the 'match' procedure
             in ypserv(8) slightly.  If a match query fails (because the
             server could not find a record that matched the supplied key),
             and the YP_INTERDOMAIN key exists within the queried map,
             ypserv(8) will try to match the entry again using a DNS lookup.
             Note that this special behavior only applies to the hosts maps.
             Using the -b flag for other maps has no effect.

     -s      This flag is used to add a special entry to the database with a
             key of YP_SECURE and an empty data field.  If this key is present
             in a map, ypserv(8) will deny access to the map to any client
             that is not using a reserved port for its query.  This is used
             mainly for the master.passwd maps, which should be restricted to
             privileged access only.

     -f      This flag is used to turn on filtering of lines in the source
             file input that start with ``+'' or ``-'' characters.  These
             characters have special meaning for the group, passwd and
             master.passwd maps and hence should not be allowed to appear in
             them as the first character of a key or datum.  If the -f flag is
             used, yp_mkdb will reject any source line that starts with a
             ``+'' or ``-'' character and issue a warning message displaying
             the line that was dropped.

     -u dbname
             Dump (or 'unwind') an NIS database.  This option can be used to
             inspect the contents of an existing NIS database.

     -i inputfile
             When generating an NIS map, encode inputfile as a special entry
             in the database with a key of YP_INPUT_FILE.

     -o outputfile
             When generating an NIS map, encode outputfile as a special entry
             in the database with a key of YP_OUTPUT_FILE.

     -d domainname
             When generating an NIS map, encode domainname as a special entry
             in the database with a key of YP_DOMAIN_NAME.

     -m mastername
             When generating an NIS map, encode mastername as a special entry
             in the database with a key of YP_MASTER_NAME.  This entry in the
             database is frequently used by various NIS utilities to determine
             the name of an NIS master server for a domain.  By default,
             yp_mkdb assumes that the local host is the NIS master; the -m
             option is used to override this default.

FILES
     /var/yp/Makefile  the Makefile that calls yp_mkdb to build the NIS
                       databases

SEE ALSO
     db(3), ypserv(8)

AUTHORS
     Bill Paul <wpaul@ctr.columbia.edu>

FreeBSD 13.1-RELEASE-p6         March 12, 1996         FreeBSD 13.1-RELEASE-p6