Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 115 insertions, 0 deletions

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+.\" -*- nroff -*-
+.\" Copyright 1993, 1994, 1995 by Theodore Ts'o.  All Rights Reserved.
+.\" This file may be copied under the terms of the GNU Public License.
+.\" 
+.TH DUMPE2FS 8 "February 2023" "E2fsprogs version 1.47.0"
+.SH NAME
+dumpe2fs \- dump ext2/ext3/ext4 file system information
+.SH SYNOPSIS
+.B dumpe2fs
+[
+.B \-bfghixV
+]
+[
+.B \-o superblock=\fIsuperblock
+]
+[
+.B \-o blocksize=\fIblocksize
+]
+.I device
+.SH DESCRIPTION
+.B dumpe2fs
+prints the super block and blocks group information for the file system
+present on
+.I device.
+.PP
+.B Note:
+When used with a mounted file system, the printed
+information may be old or inconsistent.
+.SH OPTIONS
+.TP
+.B \-b
+print the blocks which are reserved as bad in the file system.
+.TP
+.B \-o superblock=\fIsuperblock
+use the block
+.I superblock
+when examining the file system.
+This option is not usually needed except by a file system wizard who
+is examining the remains of a very badly corrupted file system.
+.TP
+.B \-o blocksize=\fIblocksize
+use blocks of
+.I blocksize
+bytes when examining the file system.
+This option is not usually needed except by a file system wizard who
+is examining the remains of a very badly corrupted file system.
+.TP
+.B \-f
+force dumpe2fs to display a file system even though it may have some
+file system feature flags which dumpe2fs may not understand (and which
+can cause some of dumpe2fs's display to be suspect).
+.TP
+.B \-g
+display the group descriptor information in a machine readable colon-separated
+value format.  The fields displayed are the group number; the number of the
+first block in the group; the superblock location (or -1 if not present); the
+range of blocks used by the group descriptors (or -1 if not present); the block
+bitmap location; the inode bitmap location; and the range of blocks used by the
+inode table.
+.TP
+.B \-h
+only display the superblock information and not any of the block
+group descriptor detail information.
+.TP
+.B \-i
+display the file system data from an image file created by
+.BR e2image ,
+using
+.I device
+as the pathname to the image file.
+.TP
+.B \-m
+If the
+.B mmp
+feature is enabled on the file system, check if
+.I device
+is in use by another node, see
+.BR e2mmpstatus (8)
+for full details.  If used together with the
+.B \-i
+option, only the MMP block information is printed.
+.TP
+.B \-x
+print the detailed group information block numbers in hexadecimal format
+.TP
+.B \-V
+print the version number of
+.B dumpe2fs
+and exit.
+.SH EXIT CODE
+.B dumpe2fs
+exits with a return code of 0 if the operation completed without errors.
+It will exit with a non-zero return code if there are any errors, such
+as problems reading a valid superblock, bad checksums, or if the device
+is in use by another node and
+.B -m
+is specified.
+.SH BUGS
+You may need to know the physical file system structure to understand the
+output.
+.SH AUTHOR
+.B dumpe2fs
+was written by Remy Card <Remy.Card@linux.org>.  It is currently being
+maintained by Theodore Ts'o <tytso@alum.mit.edu>.
+.SH AVAILABILITY
+.B dumpe2fs
+is part of the e2fsprogs package and is available from
+http://e2fsprogs.sourceforge.net.
+.SH SEE ALSO
+.BR e2fsck (8),
+.BR e2mmpstatus (8),
+.BR mke2fs (8),
+.BR tune2fs (8).
+.BR ext4 (5)
+