_IO_vfscanf
extern int _IO_vfscanf(_IO_FILE *, const char *, va_list, int *);
int count = _IO_vfscanf(_strbuf, format, ap, &errcode);
int count = _IO_vfscanf(this, fmt0, ap, &errcode);
int count = _IO_vfscanf(this, format, ap, NULL);
ret = _IO_vfscanf (&sf._sbf._f, format, args, NULL);
extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
return _IO_vfscanf (_IO_stdin, format, args, NULL);
done = _IO_vfscanf (stdin, format, arg, NULL);
strong_alias (_IO_vfscanf_internal, _IO_vfscanf)