sysdeps/unix/sysv/linux/accept4.c

   1 /* Copyright (C) 2008 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2008.
   4
   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.
   9
  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.
  14
  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
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <signal.h>
  22 #include <sys/socket.h>
  23
  24 #include <sysdep-cancel.h>
  25 #include <sys/syscall.h>
  26
  27 #define __NR_accept4                            288
  28
  29
  30 #ifdef __NR_accept4
  31 int
  32 accept4 (int fd, __SOCKADDR_ARG addr, socklen_t *addr_len, int flags)
  33 {
  34   if (SINGLE_THREAD_P)
  35     return INLINE_SYSCALL (accept4, 4, fd, addr.__sockaddr__, addr_len, flags);
  36
  37   int oldtype = LIBC_CANCEL_ASYNC ();
  38
  39   int result = INLINE_SYSCALL (accept4, 4, fd, addr.__sockaddr__, addr_len,
  40                                flags);
  41
  42   LIBC_CANCEL_RESET (oldtype);
  43
  44   return result;
  45 }
  46 #else
  47 int
  48 accept4 (int fd, __SOCKADDR_ARG addr, socklen_t *addr_len, int flags)
  49 {
  50   __set_errno (ENOSYS);
  51   return -1;
  52 }
  53 stub_warning (accept4)
  54 #endif