ref: 2d60e8ab6926bc6850e5299182747c314e2589ce
dir: /lib/c/atexit.c/
#include <stdlib.h>
#include <errno.h>
#undef atexit
extern void (*_exitf[_ATEXIT_MAX])(void);
extern unsigned _exitn;
int
atexit(void (*fun)(void))
{
if (_exitn == _ATEXIT_MAX) {
errno = ENOMEM;
return -1;
}
_exitf[_exitn++] = fun;
return 0;
}