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+/* Copyright (C) 1996-2017 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/>. */
+
+#if !defined _SYS_UIO_H && !defined _FCNTL_H
+# error "Never include <bits/uio.h> directly; use <sys/uio.h> instead."
+#endif
+
+#ifndef _BITS_UIO_H
+#define _BITS_UIO_H 1
+
+#include <sys/types.h>
+
+
+/* We should normally use the Linux kernel header file to define this
+ type and macros but this calls for trouble because of the header
+ includes other kernel headers. */
+
+/* Size of object which can be written atomically.
+
+ This macro has different values in different kernel versions. The
+ latest versions of the kernel use 1024 and this is good choice. Since
+ the C library implementation of readv/writev is able to emulate the
+ functionality even if the currently running kernel does not support
+ this large value the readv/writev call will not fail because of this. */
+#define UIO_MAXIOV 1024
+
+
+#include <bits/types/struct_iovec.h>
+
+#endif
+
+
+#ifdef __USE_GNU
+# if defined _SYS_UIO_H && !defined _BITS_UIO_H_FOR_SYS_UIO_H
+# define _BITS_UIO_H_FOR_SYS_UIO_H 1
+
+__BEGIN_DECLS
+
+/* Read from another process' address space. */
+extern ssize_t process_vm_readv (pid_t __pid, const struct iovec *__lvec,
+ unsigned long int __liovcnt,
+ const struct iovec *__rvec,
+ unsigned long int __riovcnt,
+ unsigned long int __flags)
+ __THROW;
+
+/* Write to another process' address space. */
+extern ssize_t process_vm_writev (pid_t __pid, const struct iovec *__lvec,
+ unsigned long int __liovcnt,
+ const struct iovec *__rvec,
+ unsigned long int __riovcnt,
+ unsigned long int __flags)
+ __THROW;
+
+__END_DECLS
+
+# endif
+
+/* Flags for preadv2/pwritev2: */
+#define RWF_HIPRI 0x00000001 /* High priority request. */
+#define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC. */
+#define RWF_SYNC 0x00000004 /* per-IO O_SYNC. */
+
+#endif