caddr_t -> void *
PR/4269: Chris Demetriou: Add MS_* to msync()
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christos
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@ -1,4 +1,4 @@
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.\" $NetBSD: minherit.2,v 1.1 1997/09/08 18:42:44 chuck Exp $
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.\" $NetBSD: minherit.2,v 1.2 1997/10/16 23:21:47 christos Exp $
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.\"
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.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -43,7 +43,7 @@
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.Fd #include <sys/types.h>
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.Fd #include <sys/mman.h>
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.Ft int
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.Fn minherit "caddr_t addr" "size_t len" "int inherit"
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.Fn minherit "void *addr" "size_t len" "int inherit"
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.Sh DESCRIPTION
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The
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.Fn minherit
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@ -1,4 +1,4 @@
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.\" $NetBSD: mlock.2,v 1.3 1995/06/24 10:42:03 cgd Exp $
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.\" $NetBSD: mlock.2,v 1.4 1997/10/16 23:21:50 christos Exp $
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.\"
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.\" Copyright (c) 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -44,9 +44,9 @@
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.Fd #include <sys/types.h>
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.Fd #include <sys/mman.h>
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.Ft int
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.Fn mlock "caddr_t addr" "size_t len"
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.Fn mlock "void *addr" "size_t len"
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.Ft int
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.Fn munlock "caddr_t addr" "size_t len"
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.Fn munlock "void *addr" "size_t len"
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.Sh DESCRIPTION
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The
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.Nm mlock
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@ -1,4 +1,4 @@
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.\" $NetBSD: mmap.2,v 1.8 1997/07/15 06:47:38 mikel Exp $
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.\" $NetBSD: mmap.2,v 1.9 1997/10/16 23:21:52 christos Exp $
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.\"
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.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -42,8 +42,8 @@
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/mman.h>
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.Ft caddr_t
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.Fn mmap "caddr_t addr" "size_t len" "int prot" "int flags" "int fd" "off_t offset"
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.Ft void *
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.Fn mmap "void *addr" "size_t len" "int prot" "int flags" "int fd" "off_t offset"
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.Sh DESCRIPTION
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The
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.Nm mmap
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@ -1,4 +1,4 @@
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/* $NetBSD: mmap.c,v 1.7 1997/07/13 20:25:31 christos Exp $ */
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/* $NetBSD: mmap.c,v 1.8 1997/10/16 23:21:55 christos Exp $ */
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/*
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* Copyright (c) 1992, 1993
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@ -38,7 +38,7 @@
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#if 0
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static char sccsid[] = "@(#)mmap.c 8.1 (Berkeley) 6/17/93";
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#else
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__RCSID("$NetBSD: mmap.c,v 1.7 1997/07/13 20:25:31 christos Exp $");
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__RCSID("$NetBSD: mmap.c,v 1.8 1997/10/16 23:21:55 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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@ -51,9 +51,9 @@ __RCSID("$NetBSD: mmap.c,v 1.7 1997/07/13 20:25:31 christos Exp $");
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* This function provides 64-bit offset padding that
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* is not supplied by GCC 1.X but is supplied by GCC 2.X.
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*/
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caddr_t
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void *
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mmap(addr, len, prot, flags, fd, offset)
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caddr_t addr;
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void *addr;
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size_t len;
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int prot;
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int flags;
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@ -1,4 +1,4 @@
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.\" $NetBSD: mprotect.2,v 1.6 1995/10/12 15:41:08 jtc Exp $
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.\" $NetBSD: mprotect.2,v 1.7 1997/10/16 23:21:56 christos Exp $
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.\"
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.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -43,7 +43,7 @@
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.Fd #include <sys/types.h>
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.Fd #include <sys/mman.h>
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.Ft int
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.Fn mprotect "caddr_t addr" "size_t len" "int prot"
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.Fn mprotect "void *addr" "size_t len" "int prot"
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.Sh DESCRIPTION
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The
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.Fn mprotect
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@ -1,4 +1,4 @@
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.\" $NetBSD: msync.2,v 1.8 1995/10/12 15:41:09 jtc Exp $
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.\" $NetBSD: msync.2,v 1.9 1997/10/16 23:21:57 christos Exp $
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.\"
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.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -33,23 +33,24 @@
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.\"
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.\" @(#)msync.2 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dd October 10, 1997
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.Dt MSYNC 2
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.Os
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.Os NetBSD 1.3
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.Sh NAME
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.Nm msync
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.Nd synchronize a mapped region
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/mman.h>
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.Ft int
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.Fn msync "caddr_t addr" "size_t len"
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.Fn msync "void *addr" "size_t len" "int flags"
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.Sh DESCRIPTION
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The
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.Fn msync
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system call
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writes any modified pages back to the filesystem and updates
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the file modification time.
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system call writes all pages with shared modifications
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in the specified
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region of the process's address space back to permanent
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storage, and, if requested, invalidates cached data mapped
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in the region.
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If
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.Fa len
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is 0, all modified pages within the region containing
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@ -57,39 +58,66 @@ is 0, all modified pages within the region containing
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will be flushed;
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if
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.Fa len
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is non-zero, only the pages containing
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is non-zero, only modified pages containing
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.Fa addr
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and
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.Fa len
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succeeding locations will be examined.
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succeeding locations will be flushed.
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Any required synchronization of memory caches
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will also take place at this time.
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Filesystem operations on a file that is mapped for shared modifications
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are unpredictable except after an
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.Fn msync .
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.Pp
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The
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.Fa flags
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argument is formed by
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.Em or Ns 'ing
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the following values
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.Pp
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.Bd -literal -offset indent -compact
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MS_ASYNC Perform asynchronous writes.
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MS_SYNC Perform synchronous writes.
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MS_INVALIDATE Invalidate cached data after writing.
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.Ed
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.Sh ERRORS
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The following errors may be reported:
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.Bl -tag -width Er
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.It Bq Er EBUSY
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The
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.Dv MS_INVALIDATE
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flag was specified and a portion of the specified region
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was locked with
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.Xr mlock 2 .
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.It Bq Er EINVAL
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The specified
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.Fa flags
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argument was invalid.
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.It Bq Er EINVAL
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The
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.Fa addr
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parameter was not page aligned.
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.It Bq Er EINVAL
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The
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.Fa addr
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parameter did not specify an address part of a mapped region.
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.It Bq Er EINVAL
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The
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.Fa len
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parameter was negative.
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.It Bq Er EIO
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An I/O error occured while writing to the file system.
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An I/O error occured while writing.
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.It Bq Er ENOMEM
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Addresses in the specified region are outside the range allowed
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for the address space of the process, or specify one or more pages
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which are unmapped.
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.Sh SEE ALSO
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.Xr madvise 2 ,
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.Xr munmap 2 ,
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.Xr mprotect 2 ,
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.Xr mincore 2
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.Xr mlock 2 ,
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.Xr mmap 2 ,
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.Xr munlock 2
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.Sh BUGS
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Writes are currently done synchronously even if the
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.Dv MS_ASYNC
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flag is specified.
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.Sh HISTORY
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The
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.Fn msync
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function first appeared in 4.4BSD.
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function first appeared in
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.Bx 4.4 .
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It was modified to conform to
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.St -p1003.1b-93
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in
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.Nx 1.3 .
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.P
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@ -1,4 +1,4 @@
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.\" $NetBSD: munmap.2,v 1.6 1997/07/15 06:52:43 mikel Exp $
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.\" $NetBSD: munmap.2,v 1.7 1997/10/16 23:21:59 christos Exp $
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.\"
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.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -43,7 +43,7 @@
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.Fd #include <sys/types.h>
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.Fd #include <sys/mman.h>
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.Ft int
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.Fn munmap "caddr_t addr" "size_t len"
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.Fn munmap "void *addr" "size_t len"
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.Sh DESCRIPTION
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The
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.Fn munmap
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