getnetbyname

       work entry

SYNOPSIS
       #include <netdb.h>

       struct netent *getnetent(void);

       struct netent *getnetbyname(const char *name);

       struct netent *getnetbyaddr(uint32_t net, int type);

       void setnetent(int stayopen);

       void endnetent(void);

DESCRIPTION
       The getnetent() function reads the next entry from the  networks  data-
       base  and  returns  a netent structure containing the broken-out fields
       from the entry.  A connection is opened to the database if necessary.

       The getnetbyname() function returns a netent structure  for  the  entry
       from the database that matches the network name.

       The  getnetbyaddr()  function  returns a netent structure for the entry
       from the database that matches the network number  net  of  type  type.
       The net argument must be in host byte order.

       The  setnetent()  function opens a connection to the database, and sets
       the next entry to the first entry.  If stayopen is non-zero,  then  the
       connection  to  the database will not be closed between calls to one of
       the getnet*() functions.

       The endnetent() function closes the connection to the database.

       The netent structure is defined in <netdb.h> as follows:

           struct netent {
               char      *n_name;     /* official network name */
               char     **n_aliases;  /* alias list */
               int        n_addrtype; /* net address type */
               uint32_t   n_net;      /* network number */
           }

       The members of the netent structure are:

       n_name The official name of the network.

       n_aliases
              A NULL-terminated list of alternative names for the network.

       n_addrtype
              The type of the network number; always AF_INET.

       n_net  The network number in host byte order.

NOTES
       In glibc versions before 2.2, the net argument of getnetbyaddr() was of
       type long.

SEE ALSO
       getnetent_r(3), getprotoent(3), getservent(3)
       RFC 1101

COLOPHON
       This  page  is  part of release 3.23 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.



GNU                               2008-08-19                      GETNETENT(3)