tt_open(library call)													     tt_open(library call)

NAME

       tt_open -- return the process identifier for the calling process

SYNOPSIS

       #include <Tt/tt_c.h>
       char *tt_open(void)

DESCRIPTION

       The tt_open function returns the process identifier for the calling process.

RETURN VALUE

       The  tt_open  function  also  sets  this  identifier as the default procid for the process.  The tt_open(3) function is typically the first
       ToolTalk function called by a process.

       The application must call tt_open(3) before other tt_ calls are made.  However, there are  two  exceptions:  tt_default_session_set(3)  and
       tt_X_session(3) can be called before tt_open.

       A  process  can call tt_open more than once to obtain multiple procids.	To open another session, the process must make the following calls
       in the order specified:

       tt_default_session_set
       tt_open

RETURN VALUE

       Upon successful completion, the tt_open function returns the character value that uniquely identifies the process.  The application can use
       tt_ptr_error(3) to extract one of the following Tt_status values from the returned pointer:

       TT_OK	 The operation completed successfully.

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

APPLICATION USAGE

       The application should use tt_free(3) to free any data stored in the address returned by the ToolTalk API.

       Each procid has its own associated file descriptor, and can join another session.  To switch to another procid, the application should call
       tt_default_procid_set.

SEE ALSO

       Tt/tt_c.h  -  Tttt_c(5),  tt_fd(3),  tt_default_procid(3),  tt_default_procid_set(3),   tt_default_session(3),	tt_default_session_set(3),
       tt_ptr_error(3), tt_free(3).

															     tt_open(library call)