mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/* Copyright (C) 2010 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Andreas Schwab <schwab@redhat.com>, 2010.
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <sysdep-cancel.h>
|
|
#include <sys/syscall.h>
|
|
#include <kernel-features.h>
|
|
|
|
|
|
#ifdef __NR_recvmmsg
|
|
int
|
|
recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags,
|
|
const struct timespec *tmo)
|
|
{
|
|
if (SINGLE_THREAD_P)
|
|
return INLINE_SYSCALL (recvmmsg, 5, fd, vmessages, vlen, flags, tmo);
|
|
|
|
int oldtype = LIBC_CANCEL_ASYNC ();
|
|
|
|
int result = INLINE_SYSCALL (recvmmsg, 5, fd, vmessages, vlen, flags, tmo);
|
|
|
|
LIBC_CANCEL_RESET (oldtype);
|
|
|
|
return result;
|
|
}
|
|
#elif defined __NR_socketcall
|
|
# ifndef __ASSUME_RECVMMSG
|
|
extern int __internal_recvmmsg (int fd, struct mmsghdr *vmessages,
|
|
unsigned int vlen, int flags,
|
|
const struct timespec *tmo)
|
|
attribute_hidden;
|
|
|
|
static int have_recvmmsg;
|
|
|
|
int
|
|
recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags,
|
|
const struct timespec *tmo)
|
|
{
|
|
if (__builtin_expect (have_recvmmsg >= 0, 1))
|
|
{
|
|
int ret = __internal_recvmmsg (fd, vmessages, vlen, flags, tmo);
|
|
/* The kernel returns -EINVAL for unknown socket operations.
|
|
We need to convert that error to an ENOSYS error. */
|
|
if (__builtin_expect (ret < 0, 0)
|
|
&& have_recvmmsg == 0
|
|
&& errno == EINVAL)
|
|
{
|
|
/* Try another call, this time with an invalid file
|
|
descriptor and all other parameters cleared. This call
|
|
will not cause any harm and it will return
|
|
immediately. */
|
|
ret = __internal_recvmmsg (-1, 0, 0, 0, 0);
|
|
if (errno == EINVAL)
|
|
{
|
|
have_recvmmsg = -1;
|
|
__set_errno (ENOSYS);
|
|
}
|
|
else
|
|
{
|
|
have_recvmmsg = 1;
|
|
__set_errno (EINVAL);
|
|
}
|
|
return -1;
|
|
}
|
|
return ret;
|
|
}
|
|
__set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
# else
|
|
/* When __ASSUME_RECVMMSG recvmmsg is defined in internal_recvmmsg.S. */
|
|
# endif
|
|
#else
|
|
int
|
|
recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags,
|
|
const struct timespec *tmo)
|
|
{
|
|
__set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
stub_warning (recvmmsg)
|
|
#endif
|