sysdeps/unix/sysv/linux/x86_64/recv.c

   1 /* Copyright (C) 2001-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/socket.h>
  20 #include <sysdep-cancel.h>
  21
  22 /* Read N bytes into BUF from socket FD.
  23    Returns the number read or -1 for errors.  */
  24
  25 ssize_t
  26 __libc_recv (int fd, void *buf, size_t n, int flags)
  27 {
  28   if (SINGLE_THREAD_P)
  29     return INLINE_SYSCALL (recvfrom, 6, fd, buf, n, flags, NULL, NULL);
  30
  31   int oldtype = LIBC_CANCEL_ASYNC ();
  32
  33   ssize_t result = INLINE_SYSCALL (recvfrom, 6, fd, buf, n, flags, NULL, NULL);
  34
  35   LIBC_CANCEL_RESET (oldtype);
  36
  37   return result;
  38 }
  39
  40 weak_alias (__libc_recv, __recv)
  41 weak_alias (__recv, recv)