tt_message_xarg_add(3) ToolTalk Functions tt_message_xarg_add(3)NAMEtt_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-inter‐
preted 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 han‐
dler 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 serial‐
ize 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 cor‐
rect type for this operation.
TT_ERR_XDR
The XDR procedure failed on the given data, or evaluated to
a zero-length expression.
SEE ALSOtt_c(5).
ToolTalk 1.3 1 March 1996 tt_message_xarg_add(3)
