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/* Copyright (C) 2015-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/socket.h>
#include <sysdep-cancel.h>
#include <socketcall.h>
#include <shlib-compat.h>
ssize_t
__libc_recvmsg (int fd, struct msghdr *msg, int flags)
{
ssize_t ret;
/* POSIX specifies that both msghdr::msg_iovlen and msghdr::msg_controllen
to be int and socklen_t respectively. However Linux defines it as
both size_t. So for 64-bit it requires some adjustments by copying to
temporary header and zeroing the pad fields. */
#if __WORDSIZE == 64
struct msghdr hdr, *orig = msg;
if (msg != NULL)
{
hdr = *msg;
hdr.__glibc_reserved1 = 0;
hdr.__glibc_reserved2 = 0;
msg = &hdr;
}
#endif
#ifdef __ASSUME_RECVMSG_SYSCALL
ret = SYSCALL_CANCEL (recvmsg, fd, msg, flags);
#else
ret = SOCKETCALL_CANCEL (recvmsg, fd, msg, flags);
#endif
#if __WORDSIZE == 64
if (orig != NULL)
*orig = hdr;
#endif
return ret;
}
weak_alias (__libc_recvmsg, __recvmsg)
versioned_symbol (libc, __libc_recvmsg, recvmsg, GLIBC_2_24);
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