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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

LIBRARY
     Standard C Library (libc, -lc)

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).)

SEE ALSO
     rpc_clnt_calls(3), rpc_svc_calls(3), rpcbind(8), rpcinfo(8)

BSD				  May 7, 1993				   BSD
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