tt_fd(library call)													       tt_fd(library call)

NAME

       tt_fd -- return a file descriptor

SYNOPSIS

       #include <Tt/tt_c.h>
       int tt_fd(void)

DESCRIPTION

       The  tt_fd  function returns a file descriptor.	The returned file descriptor alerts the process that a message has arrived for the default
       procid in the default session.

       File descriptors are either active or inactive.	When the file descriptor becomes active, the process must  call  tt_message_receive(3)	to
       receive the message.

RETURN VALUE

       Upon successful completion, the tt_fd function returns the file descriptor for the current procid.  The application can use tt_int_error(3)
       to extract one of the following Tt_status values from the returned integer:

       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_PROCID
		 The current default process identifier is out of date or invalid.

       TT_ERR_SESSION
		 The specified ToolTalk session is out of date or invalid.

APPLICATION USAGE

       The application must have a separate file descriptor for each procid.  To get an associated file descriptor,  the  application  should  use
       tt_fd each time it calls tt_open(3).

SEE ALSO

       Tt/tt_c.h - Tttt_c(5), tt_open(3), tt_int_error(3), tt_message_receive(3).

															       tt_fd(library call)