tt_message_barg_add(3) ToolTalk Functions tt_message_barg_add(3)NAMEtt_message_barg_add - add an argument to a pattern
SYNOPSIS
#include <Tt/tt_c.h>
Tt_status tt_message_barg_add(Tt_message m,
Tt_mode n,
const char *vtype,
const unsigned char *value,
int len);
DESCRIPTION
The tt_message_barg_add() function adds an argument to a pattern that
may have a byte-array value that contains embedded nulls.
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 ToolTalk service treats the value as an opaque byte string. To
pass structured data, the application and the receiving application
must encode and decode these opaque byte strings. The most common
method to do this is XDR.
The value argument is the value to be added. The len argument is the
length of the value in bytes.
RETURN VALUE
Upon successful completion, the tt_message_barg_add() function returns
the status of the operation as one of the following Tt_status values:
TT_OK The operation completed successfully.
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.
SEE ALSOtt_c(5), tt_message_arg_bval_set(3), tt_message_arg_add(3), tt_mes‐
sage_iarg_add(3).
ToolTalk 1.3 1 March 1996 tt_message_barg_add(3)
