1.\" $NetBSD: dumplfs.8,v 1.11 2003/08/07 11:25:20 agc 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)dumplfs.8 8.1 (Berkeley) 6/18/93 31.\" 32.Dd June 13, 2000 33.Dt DUMPLFS 8 34.Os 35.Sh NAME 36.Nm dumplfs 37.Nd dump file system information 38.Sh SYNOPSIS 39.Nm dumplfs 40.Op Fl adiS 41.Op Fl b Ar blkno 42.Op Fl I Ar blkno 43.Op Fl s Ar segno 44.Ar filesys No \&| Ar device 45.Sh DESCRIPTION 46.Nm 47prints out the file system layout information for the 48LFS file system or special device specified. 49The listing is very long and detailed. 50This command is useful mostly for finding out certain file system 51information such as the file system block size. 52.Pp 53The following flags are interpreted by 54.Nm dumplfs . 55.Bl -tag -width indent 56.It Fl a 57Dump the contents of all superblocks, not just the first. Superblocks 58appear in the dumplfs output with the segment containing them. 59.It Fl b 60Use the block specified immediately after the flag as the super block for the 61filesystem. 62.It Fl d 63Check partial segment data checksums and report mismatches. This makes 64.Nm 65operate much more slowly. 66.It Fl I 67Use the block specified immediately after the flag as the inode block 68containing the index file inode. 69.It Fl i 70Dump information about the inode free list. 71.It Fl S 72Dump information about the segment table. 73.It Fl s 74Add the segment number immediately following the flag to a list of segments to 75dump. This flag may be specified more than once to dump more than one segment. 76The default is to dump all segments. 77.El 78.Sh SEE ALSO 79.Xr disktab 5 , 80.Xr fs 5 , 81.Xr disklabel 8 , 82.Xr newfs_lfs 8 83.Sh HISTORY 84The 85.Nm dumplfs 86command appeared in 87.Bx 4.4 . 88