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tt_fd(3)
CDE


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_receive3 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_error3 to extract
  one of the following Tt_status values from the returned integer: The
  operation completed successfully.
  The ttsession1 process is not running and the ToolTalk service cannot
  restart it.
  The current default process identifier is out of date or invalid.
  The specified ToolTalk session is out of date or invalid.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_open3.

SEE ALSO
  Tt/tt_c.h5, tt_open3, tt_int_error3, tt_message_receive3.