source: kBuild/vendor/grep/current/gnulib-tests/accept.c

/* accept.c --- wrappers for Windows accept function

   Copyright (C) 2008-2021 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   This file is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Paolo Bonzini */

#include <config.h>

#define WIN32_LEAN_AND_MEAN
/* Get winsock2.h. */
#include <sys/socket.h>

/* Get set_winsock_errno, FD_TO_SOCKET etc. */
#include "w32sock.h"

#undef accept

int
rpl_accept (int fd, struct sockaddr *addr, socklen_t *addrlen)
{
  SOCKET sock = FD_TO_SOCKET (fd);

  if (sock == INVALID_SOCKET)
    {
      errno = EBADF;
      return -1;
    }
  else
    {
      SOCKET fh = accept (sock, addr, addrlen);
      if (fh == INVALID_SOCKET)
        {
          set_winsock_errno ();
          return -1;
        }
      else
        return SOCKET_TO_FD (fh);
    }
}