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HTABLE(8)                   System Manager's Manual                  HTABLE(8)



NAME
       htable - convert NIC standard format host tables

SYNOPSIS
       /etc/htable [ -c connected-nets ] [ -l local-nets ] file

DESCRIPTION
       Htable  is used to convert host files in the format specified in Inter-
       net RFC 810 to the format used by the network library routines.   Three
       files  are  created as a result of running htable: hosts, networks, and
       gateways.  The hosts file is used by  the  gethostent(3N)  routines  in
       mapping host names to addresses.  The networks file is used by the get-
       netent(3N) routines in mapping network names to numbers.  The  gateways
       file  is used by the routing daemon in identifying ``passive'' Internet
       gateways; see routed(8C) for an explanation.

       If any of the files localhosts,  localnetworks,  or  localgateways  are
       present  in  the current directory, the file's contents is prepended to
       the output file.  Of these, only  the  gateways  file  is  interpreted.
       This  allows  sites to maintain local aliases and entries which are not
       normally present in the master database.  Only one gateway to each net-
       work  will  be  placed  in  the  gateways file; a gateway listed in the
       localgateways file will override any in the input file.

       A list of networks to which the host is directly connected is specified
       with  the  -c flag.  The networks, separated by commas, may be given by
       name   or    in    internet-standard    dot    notation,    e.g.     -c
       arpanet,128.32,local-ether-net.   Htable  only  includes gateways which
       are directly connected to one of the networks specified, or  which  can
       be reached from another gateway on a connected net.

       If  the  -l option is given with a list of networks (in the same format
       as for -c), these networks will be treated as ``local,''  and  informa-
       tion  about  hosts  on local networks is taken only from the localhosts
       file.  Entries for local hosts from the main database will be  omitted.
       This  allows  the localhosts file to completely override any entries in
       the input file.

       Htable is best used in conjunction with the gettable(8C) program  which
       retrieves the NIC database from a host.

SEE ALSO
       intro(3N), gettable(8C)



4th Berkeley Distribution        4 March 1983                        HTABLE(8)