tt_fd man page on HP-UX

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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 descrip‐
       tor 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 ser‐
		 vice 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		 The  current  default	process	 identifier  is out of date or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		 The specified ToolTalk session is out of date or invalid.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_mes‐
       sage_receive(3).

							   tt_fd(library call)
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