ref: ea2d5f8dd91f10d96998aedcfbe22f21a9a73d1a
dir: /lib/c/src/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 = ENOMEN;
return -1;
}
_exitf[_exitn++] = fun;
return 0;
}