4.3BSD-UWisc/man/cat8/htable.8

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HTABLE(8)           UNIX Programmer's Manual            HTABLE(8)



NAME
     htable - convert NIC standard format host tables

SYNOPSIS
     /etc/htable [ -c _c_o_n_n_e_c_t_e_d-_n_e_t_s ] [ -l _l_o_c_a_l-_n_e_t_s ] _f_i_l_e

DESCRIPTION
     _H_t_a_b_l_e is used to convert host files in the format specified
     in Internet RFC 810 to the format used by the network
     library routines.  Three files are created as a result of
     running _h_t_a_b_l_e: _h_o_s_t_s, _n_e_t_w_o_r_k_s, and _g_a_t_e_w_a_y_s.  The _h_o_s_t_s
     file may be used by the _g_e_t_h_o_s_t_b_y_n_a_m_e(3N) routines in map-
     ping host names to addresses if the nameserver, _n_a_m_e_d(8), is
     not used.  The _n_e_t_w_o_r_k_s file is used by the _g_e_t_n_e_t_e_n_t(3N)
     routines in mapping network names to numbers.  The _g_a_t_e_w_a_y_s
     file may be used by the routing daemon in identifying ``pas-
     sive'' Internet gateways; see _r_o_u_t_e_d(8C) for an explanation.

     If any of the files _l_o_c_a_l_h_o_s_t_s, _l_o_c_a_l_n_e_t_w_o_r_k_s, or _l_o_c_a_l_g_a_t_e_-
     _w_a_y_s are present in the current directory, the file's con-
     tents 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 network will
     be placed in the gateways file; a gateway listed in the
     localgateways file will override any in the input file.

     If the gateways file is to be used, 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.  _H_t_a_b_l_e only includes gate-
     ways 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 information 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.

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

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

BUGS
     If the name-domain system provided network name mapping well



Printed 12/27/86          May 22, 1986                          1






HTABLE(8)           UNIX Programmer's Manual            HTABLE(8)



     as host name mapping, _h_t_a_b_l_e would no longer be needed.






















































Printed 12/27/86          May 22, 1986                          2