@code{on_exit}.
@end deftypefun
+@comment stdlib.h
+@comment ISO
+@deftypefun void _Exit (int @var{status})
+The @code{_Exit} function is the @w{ISO C} equivalent to @code{_exit}.
+The @w{ISO C} committee members were not sure whether the definitions of
+@code{_exit} and @code{_Exit} were compatible so they have not used the
+POSIX name.
+
+This function was introduced in @w{ISO C9x} and is declared in
+@file{stdlib.h}.
+@end deftypefun
+
When a process terminates for any reason---either by an explicit
termination call, or termination as a result of a signal---the
following things happen: