1 /* Copyright (C) 2008, 2009 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2008.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <sys/socket.h>
24 #include <sysdep-cancel.h>
25 #include <sys/syscall.h>
26 #include <kernel-features.h>
31 accept4 (int fd
, __SOCKADDR_ARG addr
, socklen_t
*addr_len
, int flags
)
34 return INLINE_SYSCALL (accept4
, 4, fd
, addr
.__sockaddr__
, addr_len
, flags
);
36 int oldtype
= LIBC_CANCEL_ASYNC ();
38 int result
= INLINE_SYSCALL (accept4
, 4, fd
, addr
.__sockaddr__
, addr_len
,
41 LIBC_CANCEL_RESET (oldtype
);
45 #elif defined __NR_socketcall
46 # ifndef __ASSUME_ACCEPT4
47 extern int __internal_accept4 (int fd
, __SOCKADDR_ARG addr
,
48 socklen_t
*addr_len
, int flags
)
51 static int have_accept4
;
54 accept4 (int fd
, __SOCKADDR_ARG addr
, socklen_t
*addr_len
, int flags
)
56 if (__builtin_expect (have_accept4
>= 0, 1))
58 int ret
= __internal_accept4 (fd
, addr
, addr_len
, flags
);
59 /* The kernel returns -EINVAL for unknown socket operations.
60 We need to convert that error to an ENOSYS error. */
61 if (__builtin_expect (ret
< 0, 0)
65 /* Try another call, this time with the FLAGS parameter
66 cleared and an invalid file descriptor. This call will not
67 cause any harm and it will return immediately. */
68 ret
= __internal_accept4 (-1, addr
, addr_len
, 0);
87 /* When __ASSUME_ACCEPT4 accept4 is defined in internal_accept4.S. */
91 accept4 (int fd
, __SOCKADDR_ARG addr
, socklen_t
*addr_len
, int flags
)
96 stub_warning (accept4
)