tt_message_xarg_add(library call)										 tt_message_xarg_add(library call)

NAME

       tt_message_xarg_add -- add an argument with an XDR-interpreted value to a message object

SYNOPSIS

       #include <Tt/tt_c.h>
       Tt_status tt_message_xarg_add(
       Tt_message m,
       Tt_mode n,
       const char *vtype,
       xdrproc_t xdr_proc,
       void *value);

DESCRIPTION

       The tt_message_xarg_add function adds an argument with an XDR-interpreted value to a message object.

       To change existing argument values, the application must use only modes TT_OUT or TT_INOUT.

       Adding arguments when replying to a message produces undefined results.

       The  m argument is the opaque handle for the message involved in this operation.  The n argument specifies who (sender, handler, observers)
       writes and reads a message argument.  The following modes are defined:

       TT_IN	 The argument is written by the sender and read by the handler and any observers.

       TT_OUT	 The argument is written by the handler and read by the sender and any reply observers.

       TT_INOUT  The argument is written by the sender and the handler and read by all.

       The vtype argument describes the type of argument data being added.  The xdr_proc argument points to the XDR procedure to be used to  seri-
       alize the data pointed to by value. The value argument is the data to be serialized.

RETURN VALUE

       Upon successful completion, the tt_message_xarg_add function returns the status of the operation as one of the following Tt_status values:

       TT_OK	 The operation completed successfully.

       TT_ERR_MODE
		 The specified Tt_mode is invalid.

       TT_ERR_NOMP
		 The ttsession(1) process is not running and the ToolTalk service cannot restart it.

       TT_ERR_POINTER
		 The pointer passed does not point to an object of the correct type for this operation.

       TT_ERR_XDR
		 The XDR procedure failed on the given data, or evaluated to a zero-length expression.

SEE ALSO

       Tt/tt_c.h - Tttt_c(5)

														 tt_message_xarg_add(library call)