tt_pattern_arg_add(3)

NAME
     tt_pattern_arg_add - add an argument to a pattern

SYNOPSIS
     #include <Tt/tt_c.h>
     Tt_status tt_pattern_arg_add(Tt_pattern p,
                                  Tt_mode n,
                                  const char *vtype,
                                  const char *value);

DESCRIPTION
     The tt_pattern_arg_add() function adds an argument to a pattern.  The
     application must add pattern arguments before it registers the pattern
     with the ToolTalk service.

     The p argument is the opaque handle for the pattern 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
     type ALL matches any argument value type.  The value argument is the
     value to fill in.  This value must be an unsigned character string.  A
     NULL matches any value.

RETURN VALUE
     Upon successful completion, the tt_pattern_arg_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 correct
                type for this operation.
SEE ALSO
     Tttt_c(5), tt_pattern_register(3), tt_pattern_barg_add(3),
     tt_pattern_iarg_add(3).