XPAAtExit - install exit handler

XPAAtExit() will install an exit handler using atexit() to run XPAFree on all XPA access points. This
       might be useful in cases where Unix sockets are being used: if an explicit call to XPAFree() is not made
       by the program, the Unix socket file will not be deleted immediately without an atexit handler. (NB: this
       call should not be made in a Tcl/Tk application. Accessing the Tcl native file system after Tcl has shut
       down all file systems causes the Tcl/Tl program to crash).

version 2.1.15                                    July 23, 2013                                     xpaatexit(3)

XPAAtExit-installexithandler

         #include <xpa.h>

         void XPAAtExit(void);