HP-UX Reference (11i v2 03/08) - 3 Library Functions N-Z (vol 7)

r
rpc_clnt_create(3N) rpc_clnt_create(3N)
void clnt_destroy()
A function macro that destroys the client’s RPC handle. Destruction usually involves deallocation of
private data structures, including clnt itself. Use of clnt is undefined after calling
clnt_destroy( )
. If the RPC library opened the associated file descriptor, or
CLSET_FD_CLOSE
was set using clnt_control( )
, the file descriptor will be closed.
The caller should call
auth_destroy(
clnt→cl_auth) (before calling clnt_destroy()
)to
destroy the associated AUTH structure (see rpc_clnt_auth(3N)).
CLIENT *clnt_dg_create()
This routine creates an RPC client for the remote program prognum and version versnum; the client
uses a connectionless transport. The remote program is located at address svcaddr . The parameter
fildes is an open and bound file descriptor. This routine will resend the call message in intervals of
15 seconds until a response is received or until the call times out. The total time for the call to time
out is specified by
clnt_call() (see
clnt_call() in rpc_clnt_calls(3N)). The retry time out
and the total time out periods can be changed using
clnt_control()
. The user may set the size
of the send and receive buffers with the parameters sendsz and recvsz; values of
0 choose suitable
defaults. This routine returns
NULL if it fails.
void clnt_pcreateerror()
Print a message to standard error indicating why a client RPC handle could not be created. The
message is prepended with the string s and a colon, and appended with a newline.
CLIENT *clnt_raw_create()
This routine creates an RPC client handle for the remote program prognum and version versnum.
The transport used to pass messages to the service is a buffer within the process’s address space, so
the corresponding RPC server should live in the same address space; (see
svc_raw_create() in
rpc_svc_create(3N)). This allows simulation of RPC and measurement of RPC overheads, such as
round trip times, without any kernel or networking interference. This routine returns
NULL if it
fails.
clnt_raw_create()
should be called after svc_raw_create().
char *clnt_spcreateerror()
Like clnt_pcreateerror()
, except that it returns a string instead of printing to the standard
error. A newline is not appended to the message in this case.
Warning: returns a pointer to a buffer that is overwritten on each call. In multithread applications,
this buffer is implemented as thread-specific data.
CLIENT *clnt_tli_create()
This routine creates an RPC client handle for the remote program prognum and version versnum.
The remote program is located at address svcaddr.Ifsvcaddr is NULL and it is connection-
oriented, it is assumed that the file descriptor is connected. For connectionless transports, if
svcaddr is NULL, RPC_UNKNOWNADDR
error is set. fildes is a file descriptor which may be open,
bound and connected. If it is
RPC_ANYFD, it opens a file descriptor on the transport specified by
netconf.Iffildes is RPC_ANYFD and netconf is NULL,aRPC_UNKNOWNPROTO
error is set. If fildes
is unbound, then it will attempt to bind the descriptor. The user may specify the size of the buffers
with the parameters sendsz and recvsz; values of
0choosesuitabledefaults. Depending upon the
type of the transport (connection-oriented or connectionless),
clnt_tli_create() calls
appropriate client creation routines. This routine returns
NULL if it fails. The
clnt_pcreateerror() routine can be used to print the reason for failure. The remote
rpcbind service (see rpcbind(1M)) is not consulted for the address of the remote service.
CLIENT *clnt_tp_create()
Like clnt_create() except clnt_tp_create() tries only one transport specified through
netconf.
clnt_tp_create() creates a client handle for the program prognum, the version versnum, and
for the transport specified by netconf. Default options are set, which can be changed using
clnt_control() calls. The remote rpcbind service on the host host is consulted for the
address of the remote service. This routine returns NULL if it fails. The clnt_pcreateerror()
routine can be used to print the reason for failure.
CLIENT *clnt_vc_create()
This routine creates an RPC client for the remote program prognum and version versnum; the client
uses a connection-oriented transport. The remote program is located at address svcaddr. The
parameter fildes is an open and bound file descriptor. The user may specify the size of the send and
receive buffers with the parameters sendsz and recvsz; values of 0 choose suitable defaults. This
HP-UX 11i Version 2: August 2003 − 3 − Hewlett-Packard Company Section 3−−891