ref: 1156d6a42e3a86badbda9c894bee1be97aed7923
dir: /src/libc/stdlib/exit.c/
#include <stdlib.h>
#undef exit
void (*_exitf[_ATEXIT_MAX])(void);
unsigned _exitn;
void
exit(int status)
{
while (_exitn > 0)
(*_exitf[--_exitn])();
_Exit(status);
}