GETNETENT(3N)           COMMAND REFERENCE           GETNETENT(3N)



NAME
     getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent
     - get network entry

SYNOPSIS
     #include <netdb.h>

     struct netent *getnetent()

     struct netent *getnetbyname(name)
     char *name;

     struct netent *getnetbyaddr(net,addrtype)
     long net;
     int addrtype;

     setnetent(stayopen)
     int stayopen

     endnetent()

DESCRIPTION
     Getnetent, getnetbyname, and getnetbyaddr each return a
     pointer to an object with the following structure containing
     the broken-out fields of a line in the network database,
     /etc/networks.

          struct    netent {
               char *n_name;  /* official name of net */
               char **n_aliases;   /* alias list */
               int  n_addrtype;    /* net address type */
               int  n_net;         /* network # */
          };



     The members of this structure are:

     n_name      The official name of the network.

     n_aliases   A zero terminated list of  alternate  names  for
                 the network.

     n_addrtype  The  type  of  the  network   number   returned;
                 currently only AF_INET.

     n_net       The  network  number.    Network   numbers   are
                 returned in host byte order.







Printed 10/17/86                                                1

GETNETENT(3N)           COMMAND REFERENCE           GETNETENT(3N)



     Getnetent reads the next line of the file, opening the  file
     if necessary.  The file remains open upon completion.

     Getnetbyname and getnetbyaddr open the file,  if  necessary,
     then  sequentially  search  from  the  beginning of the file
     until a matching net name or net address and address  family
     is  found,  or until EOF is encountered.  The file is closed
     upon completion.  Network numbers are supplied in host  byte
     order.

     Setnetent opens and rewinds the file.  If the stayopen  flag
     is   nonzero,  the  net  database  will  not  be  closed  by
     subsequent  calls  to   endnetent   (either   directly,   or
     indirectly through one of the other getnet calls).

     Endnetent closes the file.

FILES
     /etc/networks


DIAGNOSTICS
     Null pointer (0) returned on EOF or error.

CAVEATS
     All information is contained in a static area so it must  be
     copied  if it is to be saved.  Only Internet network numbers
     are currently understood.

SEE ALSO
     networks(5n).
























Printed 10/17/86                                                2

%%index%%
na:72,120;
sy:192,1408;
de:1600,1237;2981,1201;
fi:4182,79;
di:4261,127;
ca:4388,214;
se:4602,111;
%%index%%000000000132