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RPCBIND(3)               BSD Library Functions Manual               RPCBIND(3)
NAME
     rpcb_getmaps, rpcb_getaddr, rpcb_gettime, rpcb_rmtcall, rpcb_set,
     rpcb_unset -- library routines for RPC bind service
SYNOPSIS
     #include <rpc/rpc.h>
     rpcblist *
     rpcb_getmaps(const struct netconfig *netconf, const char *host);
     bool_t
     rpcb_getaddr(const rpcprog_t prognum, const rpcvers_t versnum,
         const struct netconfig *netconf, struct netbuf *svcaddr,
         const char *host);
     bool_t
     rpcb_gettime(const char *host, time_t * timep);
     enum clnt_stat
     rpcb_rmtcall(const struct netconfig *netconf, const char *host,
         const rpcprog_t prognum, const rpcvers_t versnum,
         const rpcproc_t procnum, const xdrproc_t inproc, const caddr_t in,
         const xdrproc_t outproc, const caddr_t out,
         const struct timeval tout, const struct netbuf *svcaddr);
     bool_t
     rpcb_set(const rpcprog_t prognum, const rpcvers_t versnum,
         const struct netconfig *netconf, const struct netbuf *svcaddr);
     bool_t
     rpcb_unset(const rpcprog_t prognum, const rpcvers_t versnum,
         const struct netconfig *netconf);
DESCRIPTION
     These routines allow client C programs to make procedure calls to the RPC
     binder service.  (see rpcbind(8)) maintains a list of mappings between
     programs and their universal addresses.
Routines
     rpcb_getmaps()
            An interface to the rpcbind service, which returns a list of the
            current RPC program-to-address mappings on host.  It uses the
            transport specified through netconf to contact the remote rpcbind
            service on host.  This routine will return NULL, if the remote
            rpcbind could not be contacted.
     rpcb_getaddr()
            An interface to the rpcbind service, which finds the address of
            the service on host that is registered with program number
            prognum, version versnum, and speaks the transport protocol asso-
            ciated with netconf.  The address found is returned in svcaddr.
            The svcaddr argument should be preallocated.  This routine returns
            TRUE if it succeeds.  A return value of FALSE means that the map-
            ping does not exist or that the RPC system failed to contact the
            remote rpcbind service.  In the latter case, the global variable
            rpc_createerr (see rpc_clnt_create(3)) contains the RPC status.
     rpcb_gettime()
            This routine returns the time on host in timep.  If host is NULL,
            rpcb_gettime() returns the time on its own machine.  This routine
            returns TRUE if it succeeds, FALSE if it fails.  The
            rpcb_gettime() function can be used to synchronize the time
            between the client and the remote server.
     rpcb_rmtcall()
            An interface to the rpcbind service, which instructs rpcbind on
            host to make an RPC call on your behalf to a procedure on that
            host.  The netconfig() structure should correspond to a connec-
            tionless transport.  The svcaddr argument will be modified to the
            server's address if the procedure succeeds (see rpc_call() and
            clnt_call() in rpc_clnt_calls(3) for the definitions of other
            arguments).
            This procedure should normally be used for a ``ping'' and nothing
            else.  This routine allows programs to do lookup and call, all in
            one step.
            Note: Even if the server is not running rpcb_rmtcall() does not
            return any error messages to the caller.  In such a case, the
            caller times out.
            Note: rpcb_rmtcall() is only available for connectionless trans-
            ports.
     rpcb_set()
            An interface to the rpcbind service, which establishes a mapping
            between the triple [prognum, versnum, netconf->nc_netid] and
            svcaddr on the machine's rpcbind service.  The value of nc_netid
            must correspond to a network identifier that is defined by the
            netconfig database.  This routine returns TRUE if it succeeds,
            FALSE otherwise.  (See also svc_reg() in rpc_svc_calls(3).)  If
            there already exists such an entry with rpcbind, rpcb_set() will
            fail.
     rpcb_unset()
            An interface to the rpcbind service, which destroys the mapping
            between the triple [prognum, versnum, netconf->nc_netid] and the
            address on the machine's rpcbind service.  If netconf is NULL,
            rpcb_unset() destroys all mapping between the triple [prognum,
            versnum, all-transports] and the addresses on the machine's
            rpcbind service.  This routine returns TRUE if it succeeds, FALSE
            otherwise.  Only the owner of the service or the super-user can
            destroy the mapping.  (See also svc_unreg() in rpc_svc_calls(3).)
AVAILABILITY
     These functions are part of libtirpc.
ENVIRONMENT
     If RPCB_V2FIRST is defined, rpcbind protocol version tryout algorithm
     changes from v4,v2,v3 to v2,v4,v3.
SEE ALSO
     rpc_clnt_calls(3), rpc_svc_calls(3), rpcbind(8), rpcinfo(8)
BSD                               May 7, 1993                              BSD