**********************************************************************
*
* Function:
* --------
*
* This function uses the utmpx
* functions to locate and remove the caller's USERID from the utmpx
* file.  This routine is a SETUID program, so that it can write to the
* utmpx file.
*
* note: This routine removes the caller's session from the utmpx file
*       whenever it is called.  If this routine is called erroneously
*       (when the user is not really logging off) it will go ahead and
*       remove the session from the utmpx file.  This will destroy the
*       integrity of the utmpx file.

* Parameters:
* ----------
*
*   1:IN      argc -- usual main() parameters
*
*   2:IN      argv -- usual main() parameters
*
*     argv[0] = program name ("fomtlinc")
*
*     argv[1] = exit status (as a %d-coded integer value)
*
*     argv[2] = (not used)
*
*     argv[3] = (not used)
*
*     argv[4] = debug level (as a %d-coded integer = 0 to 5)
*
*     others -- test only arguments follow
*

*
*
*   assumed file descriptors on entry:
*
*   0 -- master TTY (needed for ttyname()
*   1 -- might be a debug fd (debug messages written here)
*   2 -- might be an error fd (for system error messages)
*
*
* Return Value:
* ------------
*
*   1-byte exit status contains 2 bits of syscall ID and 6 bits of
*   compressed errno information for the parent.  This information is
*   used only by the TSO/E OMVS command to put out logoff-oriented
*   error messages to the user's terminal.

* Non-returning Exits: none
* -------------------
*
*
* Main Side Effects:
* -----------------
*
*   The caller's session is removed from the utmpx file