at_quick_exit —
registers a cleanup function to run on quick exit
Standard C Library (libc, -lc)
#include <stdlib.h>
int
  
  at_quick_exit(void
    (*func)(void));
The at_quick_exit() function registers a cleanup
  function to be called when the program exits as a result of calling
  quick_exit(3). The cleanup
  functions are called in the reverse order and will not be called if the
  program exits by calling exit(3),
  _Exit(2), or
  abort(3).
The at_quick_exit() function returns the value 0 if
  successful and a non-zero value on failure.
The at_quick_exit() function conforms to
  ISO/IEC 9899:2011 (“ISO C11”).