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This commit is contained in:
Philippe Charnier 1998-07-06 07:17:27 +00:00
parent 46fc8f78df
commit 7b353f1aca
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=37428
4 changed files with 22 additions and 18 deletions
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12
sbin/mount_null/mount_null.8
View File

@ -35,7 +35,7 @@
.\" SUCH DAMAGE. .\" SUCH DAMAGE.
.\" .\"
.\" @(#)mount_null.8 8.6 (Berkeley) 5/1/95 .\" @(#)mount_null.8 8.6 (Berkeley) 5/1/95
.\" $Id: mount_null.8,v 1.7 1997/02/22 14:32:50 peter Exp $ .\" $Id: mount_null.8,v 1.8 1997/03/11 12:33:34 peter Exp $
.\" .\"
.Dd May 1, 1995 .Dd May 1, 1995
.Dt MOUNT_NULL 8 .Dt MOUNT_NULL 8
@ -51,7 +51,7 @@ demonstrate the use of a null file system layer
.Ar mount-point .Ar mount-point
.Sh DESCRIPTION .Sh DESCRIPTION
The The
.Nm mount_null .Nm
command creates a command creates a
null layer, duplicating a sub-tree of the file system null layer, duplicating a sub-tree of the file system
name space under another part of the global file system namespace. name space under another part of the global file system namespace.
@ -68,7 +68,7 @@ A different device number for the virtual copy is returned by
but in other respects it is indistinguishable from the original. but in other respects it is indistinguishable from the original.
.Pp .Pp
The The
.Nm mount_null .Nm
filesystem differs from a traditional filesystem differs from a traditional
loopback file system in two respects: it is implemented using loopback file system in two respects: it is implemented using
a stackable layers techniques, and it's a stackable layers techniques, and it's
@ -189,7 +189,9 @@ process when constructing other vnode stacks.
.Sh CREATING OTHER FILE SYSTEM LAYERS .Sh CREATING OTHER FILE SYSTEM LAYERS
One of the easiest ways to construct new file system layers is to make One of the easiest ways to construct new file system layers is to make
a copy of the null layer, rename all files and variables, and a copy of the null layer, rename all files and variables, and
then begin modifying the copy. Sed can be used to easily rename then begin modifying the copy.
.Xr Sed 1
can be used to easily rename
all variables. all variables.
.Pp .Pp
The umap layer is an example of a layer descended from the The umap layer is an example of a layer descended from the
@ -228,6 +230,6 @@ UCLA Technical Report CSD-910056,
.Em "Stackable Layers: an Architecture for File System Development" . .Em "Stackable Layers: an Architecture for File System Development" .
.Sh HISTORY .Sh HISTORY
The The
.Nm mount_null .Nm
utility first appeared in utility first appeared in
.Bx 4.4 . .Bx 4.4 .

8
sbin/mount_null/mount_null.c
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@ -35,17 +35,17 @@
*/ */
#ifndef lint #ifndef lint
char copyright[] = static const char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\ "@(#) Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n"; The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */ #endif /* not lint */
#ifndef lint #ifndef lint
/* #if 0
static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95"; static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95";
*/ #endif
static const char rcsid[] = static const char rcsid[] =
"$Id: mount_null.c,v 1.9 1997/03/29 03:32:42 imp Exp $"; "$Id$";
#endif /* not lint */ #endif /* not lint */
#include <sys/param.h> #include <sys/param.h>

12
sbin/mount_nullfs/mount_nullfs.8
View File

@ -35,7 +35,7 @@
.\" SUCH DAMAGE. .\" SUCH DAMAGE.
.\" .\"
.\" @(#)mount_null.8 8.6 (Berkeley) 5/1/95 .\" @(#)mount_null.8 8.6 (Berkeley) 5/1/95
.\" $Id: mount_null.8,v 1.7 1997/02/22 14:32:50 peter Exp $ .\" $Id: mount_null.8,v 1.8 1997/03/11 12:33:34 peter Exp $
.\" .\"
.Dd May 1, 1995 .Dd May 1, 1995
.Dt MOUNT_NULL 8 .Dt MOUNT_NULL 8
@ -51,7 +51,7 @@ demonstrate the use of a null file system layer
.Ar mount-point .Ar mount-point
.Sh DESCRIPTION .Sh DESCRIPTION
The The
.Nm mount_null .Nm
command creates a command creates a
null layer, duplicating a sub-tree of the file system null layer, duplicating a sub-tree of the file system
name space under another part of the global file system namespace. name space under another part of the global file system namespace.
@ -68,7 +68,7 @@ A different device number for the virtual copy is returned by
but in other respects it is indistinguishable from the original. but in other respects it is indistinguishable from the original.
.Pp .Pp
The The
.Nm mount_null .Nm
filesystem differs from a traditional filesystem differs from a traditional
loopback file system in two respects: it is implemented using loopback file system in two respects: it is implemented using
a stackable layers techniques, and it's a stackable layers techniques, and it's
@ -189,7 +189,9 @@ process when constructing other vnode stacks.
.Sh CREATING OTHER FILE SYSTEM LAYERS .Sh CREATING OTHER FILE SYSTEM LAYERS
One of the easiest ways to construct new file system layers is to make One of the easiest ways to construct new file system layers is to make
a copy of the null layer, rename all files and variables, and a copy of the null layer, rename all files and variables, and
then begin modifying the copy. Sed can be used to easily rename then begin modifying the copy.
.Xr Sed 1
can be used to easily rename
all variables. all variables.
.Pp .Pp
The umap layer is an example of a layer descended from the The umap layer is an example of a layer descended from the
@ -228,6 +230,6 @@ UCLA Technical Report CSD-910056,
.Em "Stackable Layers: an Architecture for File System Development" . .Em "Stackable Layers: an Architecture for File System Development" .
.Sh HISTORY .Sh HISTORY
The The
.Nm mount_null .Nm
utility first appeared in utility first appeared in
.Bx 4.4 . .Bx 4.4 .

8
sbin/mount_nullfs/mount_nullfs.c
View File

@ -35,17 +35,17 @@
*/ */
#ifndef lint #ifndef lint
char copyright[] = static const char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\ "@(#) Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n"; The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */ #endif /* not lint */
#ifndef lint #ifndef lint
/* #if 0
static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95"; static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95";
*/ #endif
static const char rcsid[] = static const char rcsid[] =
"$Id: mount_null.c,v 1.9 1997/03/29 03:32:42 imp Exp $"; "$Id$";
#endif /* not lint */ #endif /* not lint */
#include <sys/param.h> #include <sys/param.h>