1.\" $NetBSD: dumplfs.8,v 1.8 2002/01/19 03:10:41 wiz Exp $ 2.\" 3.\" Copyright (c) 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)dumplfs.8 8.1 (Berkeley) 6/18/93 35.\" 36.Dd June 13, 2000 37.Dt DUMPLFS 8 38.Os 39.Sh NAME 40.Nm dumplfs 41.Nd dump file system information 42.Sh SYNOPSIS 43.Nm dumplfs 44.Op Fl a 45.Op Fl b Ar blkno 46.Op Fl I Ar blkno 47.Op Fl i 48.Op Fl s Ar segno 49.Op Ar filesys No \&| Ar device 50.Sh DESCRIPTION 51.Nm 52prints out the file system layout information for the 53LFS file system or special device specified. 54The listing is very long and detailed. 55This command is useful mostly for finding out certain file system 56information such as the file system block size. 57.Pp 58The following flags are interpreted by 59.Nm dumplfs . 60.Bl -tag -width indent 61.It Fl a 62Dump the contents of all superblocks, not just the first. Superblocks 63appear in the dumplfs output with the segment containing them. 64.It Fl b 65Use the block specified immediately after the flag as the super block for the 66filesystem. 67.It Fl I 68Use the block specified immediately after the flag as the inode block 69containing the index file inode. 70.It Fl i 71Dump information about the inode free list. 72.It Fl s 73Add the segment number immediately following the flag to a list of segments to 74dump. This flag may be specified more than once to dump more than one segment. 75The default is to dump all segments. 76.El 77.Sh SEE ALSO 78.Xr disktab 5 , 79.Xr fs 5 , 80.Xr disklabel 8 , 81.Xr newfs_lfs 8 82.Sh HISTORY 83The 84.Nm dumplfs 85command appeared in 86.Bx 4.4 . 87