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NAMErpcbind, rpcb_getmaps, rpcb_getaddr, rpcb_gettime, rpcb_rmtcall, rpcb_set, rpcb_unset — library routines for RPC bind service SYNOPSIS#include <rpc/rpc.h> struct rpcblist *rpcb_getmaps(const struct netconfig *netconf,
const char *host); bool_t rpcb_getaddr(const u_long prognum,
const u_long 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 u_long prognum,
const u_long versnum,
const u_long procnum,
const xdrproc_t inproc,
const caddr_t in,
const xdrproc_t outproc,
caddr_t out,
const struct timeval tout,
struct netbuf *svcaddr); bool_t rpcb_set(const u_long prognum,
const u_long versnum,
const struct netconfig *netconf,
const struct netbuf *svcaddr); bool_t rpcb_unset(const u_long prognum,
const u_long versnum,
const struct netconfig *netconf); DESCRIPTIONThese routines allow client C programs to make procedure
calls to the RPC binder service.
rpcbind
(see
rpcbind(1M))
maintains a list of mappings between programs
and their universal addresses. Routines- struct rpcblist *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. - bool_t 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 associated with
netconf.
The address found is returned in
svcaddr.
svcaddr
should be preallocated.
This routine returns
TRUE
if it succeeds. A return value of
FALSE
means that the mapping 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(3N))
contains the
RPC
status. - bool_t 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.
rpcb_gettime()
can be used to synchronize the time between the
client and the remote server.
This routine is particularly useful for secure
RPC. - enum clnt_stat 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 connectionless transport.
The parameter
*svcaddr
will be modified to the server's address if the procedure succeeds
(see
rpc_call()
and
clnt_call()
in
rpc_clnt_calls(3N)
for the definitions of other parameters). 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
rpcbind
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 transports. - bool_t 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(3N)).
If there already exists such an entry with
rpcbind,
rpcb_set()
will fail. - bool_t 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(3N)).
MULTITHREAD USAGE- Thread Safe:
Yes - Cancel Safe:
Yes - Fork Safe:
No - Async-cancel Safe:
No - Async-signal Safe:
No
These functions can be called safely in a multithreaded environment. They
may be cancellation points in that they call functions that are cancel
points. In a multithreaded environment, these functions are
not safe to be called by a child process after
fork()
and before
exec().
These functions should not be called by a multithreaded application
that support asynchronous cancellation or asynchronous signals. |
