#include <errno.h>
#include <fcntl.h>
#include "syscall.h"
-#include "libc.h"
int accept4(int fd, struct sockaddr *restrict addr, socklen_t *restrict len, int flg)
{
if (!flg) return accept(fd, addr, len);
int ret = socketcall_cp(accept4, fd, addr, len, flg, 0, 0);
if (ret>=0 || (errno != ENOSYS && errno != EINVAL)) return ret;
+ if (flg & ~(SOCK_CLOEXEC|SOCK_NONBLOCK)) {
+ errno = EINVAL;
+ return -1;
+ }
ret = accept(fd, addr, len);
if (ret<0) return ret;
if (flg & SOCK_CLOEXEC)