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diff --git a/sysdeps/unix/bsd/ultrix4/sys/mman.h b/sysdeps/unix/bsd/ultrix4/sys/mman.h
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+/* Definitions for BSD-style memory management.  Ultrix 4 version.
+Copyright (C) 1994 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* These are the bits used by 4.4 BSD and its derivatives.  On systems
+   (such as GNU) where these facilities are not system services but can be
+   emulated in the C library, these are the definitions we emulate.  */
+
+#ifndef        _SYS_MMAN_H
+
+#define        _SYS_MMAN_H     1
+#include <features.h>
+
+#include <gnu/types.h>
+#define __need_size_t
+#include <stddef.h>
+
+
+/* Protections are chosen from these bits, OR'd together.  The
+   implementation does not necessarily support PROT_EXEC or PROT_WRITE
+   without PROT_READ.  The only guarantees are that no writing will be
+   allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
+
+#define        PROT_NONE       0x00    /* No access.  */
+#define        PROT_READ       0x01    /* Pages can be read.  */
+#define        PROT_WRITE      0x02    /* Pages can be written.  */
+#define        PROT_EXEC       0x04    /* Pages can be executed.  */
+
+
+/* Sharing types (must choose one and only one of these).  */
+#define        MAP_SHARED      0x01    /* Share changes.  */
+#define        MAP_PRIVATE     0x02    /* Changes private; copy pages on write.  */
+#define        MAP_TYPE        0x0f    /* Mask for sharing type.  */
+
+/* Other flags.  */
+#define        MAP_FIXED       0x10    /* Map address must be exactly as requested. */
+
+/* Advice to `madvise'.  */
+#define        MADV_NORMAL     0       /* No further special treatment.  */
+#define        MADV_RANDOM     1       /* Expect random page references.  */
+#define        MADV_SEQUENTIAL 2       /* Expect sequential page references.  */
+#define        MADV_WILLNEED   3       /* Will need these pages.  */
+#define        MADV_DONTNEED   4       /* Don't need these pages.  */
+
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+/* Map addresses starting near ADDR and extending for LEN bytes.  from
+   OFFSET into the file FD describes according to PROT and FLAGS.  If ADDR
+   is nonzero, it is the desired mapping address.  If the MAP_FIXED bit is
+   set in FLAGS, the mapping will be at ADDR exactly (which must be
+   page-aligned); otherwise the system chooses a convenient nearby address.
+   The return value is the actual mapping address chosen or (caddr_t) -1
+   for errors (in which case `errno' is set).  A successful `mmap' call
+   deallocates any previous mapping for the affected region.  */
+
+__caddr_t mmap __P ((__caddr_t __addr, size_t __len,
+                    int __prot, int __flags, int __fd, off_t __offset));
+
+/* Deallocate any mapping for the region starting at ADDR and extending LEN
+   bytes.  Returns 0 if successful, -1 for errors (and sets errno).  */
+int munmap __P ((__caddr_t __addr, size_t __len));
+
+/* Change the memory protection of the region starting at ADDR and
+   extending LEN bytes to PROT.  Returns 0 if successful, -1 for errors
+   (and sets errno).  */
+int mprotect __P ((__caddr_t __addr, size_t __len, int __prot));
+
+/* Ultrix 4 does not implement `msync' or `madvise'.  */
+
+/* Synchronize the region starting at ADDR and extending LEN bytes with the
+   file it maps.  Filesystem operations on a file being mapped are
+   unpredictable before this is done.  */
+int msync __P ((caddr_t __addr, size_t __len));
+
+/* Advise the system about particular usage patterns the program follows
+   for the region starting at ADDR and extending LEN bytes.  */
+int madvise __P ((__caddr_t __addr, size_t __len, int __advice));
+
+__END_DECLS
+
+
+#endif /* sys/mman.h */