sysdeps/unix/sysv/linux/oldsendmsg.c

   1 /* Compatibility implementation of sendmsg.
   2    Copyright (C) 2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/socket.h>
  20 #include <sysdep-cancel.h>
  21 #include <socketcall.h>
  22 #include <shlib-compat.h>
  23
  24 /* Both libc.so and libpthread.so provides sendmsg, so we need to
  25    provide the compat symbol for both libraries.  */
  26 #if SHLIB_COMPAT (MODULE_NAME, GLIBC_2_0, GLIBC_2_24)
  27
  28 /* We can use the same struct layout for old symbol version since
  29    size is the same.  */
  30 ssize_t
  31 __old_sendmsg (int fd, const struct msghdr *msg, int flags)
  32 {
  33 # ifdef __ASSUME_SENDMSG_SYSCALL
  34   return SYSCALL_CANCEL (sendmsg, fd, msg, flags);
  35 # else
  36   return SOCKETCALL_CANCEL (sendmsg, fd, msg, flags);
  37 # endif
  38 }
  39 compat_symbol (MODULE_NAME, __old_sendmsg, sendmsg, GLIBC_2_0);
  40 #endif