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NetBSD/sbin/fsck_lfs/fsck_lfs.8

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2001-11-16 14:26:53 +03:00
.\" $NetBSD: fsck_lfs.8,v 1.7 2001/11/16 11:26:55 wiz Exp $
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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.\"
.\" Copyright (c) 1980, 1989, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)fsck.8 8.3 (Berkeley) 11/29/94
.\"
.Dd March 17, 1999
.Dt FSCK_LFS 8
Drop arguments of .Os.
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.Os
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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.Sh NAME
.Nm fsck_lfs
"LFS" really stands for "Log-*structured* File System"
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.Nd Log-structured File System consistency check and interactive repair
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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.Sh SYNOPSIS
.Nm fsck_lfs
.Op Fl b Ar block#
.Op Fl d
.\" .Op Fl m
.\" .Op Fl f
.Op Fl p
.Op Fl y
.Op Fl n
.Ar filesystem
.Ar ...
.Sh DESCRIPTION
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
performs interactive filesystem consistency checks and repair for each of
the filesystems specified on the command line. It is normally invoked from
.Xr fsck 8 .
.Pp
The design of LFS takes care that no filesystem inconsistencies can
happen unless hardware or software failures intervene.
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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will report and optionally correct any such inconsistencies.
.Pp
For each corrected inconsistency one or more lines will be printed
identifying the filesystem on which the correction will take place,
and the nature of the correction. After successfully correcting a filesystem,
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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will print the number of files on that filesystem,
the number of used and free blocks,
and the percentage of fragmentation.
.Pp
If sent a
.Dv QUIT
signal,
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
will finish the filesystem checks, then exit with an abnormal return status.
.Pp
Without the
.Fl p
option,
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
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audits and interactively repairs inconsistent conditions for filesystems.
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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If the filesystem is inconsistent the operator is prompted for concurrence
before each correction is attempted.
It should be noted that some of the corrective actions will result in
some loss of data.
The amount and severity of data lost may be determined from the diagnostic
output.
The default action for each consistency correction
is to wait for the operator to respond
.Li yes
or
.Li no .
If the operator does not have write permission on the filesystem
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
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will default to a
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.Fl n
action.
.Pp
The following flags are interpreted by
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
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.Nm "" .
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.Bl -tag -width indent
.It Fl b
Use the block specified immediately after the flag as
fsck_lfs can now write to the filesystem, allowing it to correct most (though still not all) errors in a damaged lfs. Segment byte accounting is corrected in pass 5. "fsck_lfs -p" will do a partial roll-forward, verifying the checkpoint from the newer superblock. fscknames[] is updated so that fsck knows about fsck_lfs.
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the super block for the filesystem.
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
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.It Fl d
Print debugging output.
.\" .It Fl f
.\" Force checking of file systems. Normally, if a file system is cleanly
.\" unmounted, the kernel will set a
.\" .Dq clean flag
.\" in the file system superblock, and
.\" .Nm
.\" will not check the file system. This option forces
.\" .Nm
.\" to check the file system, regardless of the state of the clean flag.
.\" .It Fl m
.\" Use the mode specified in octal immediately after the flag as the
.\" permission bits to use when creating the
.\" .Pa lost+found
.\" directory rather than the default 1700.
.\" In particular, systems that do not wish to have lost files accessible
.\" by all users on the system should use a more restrictive
.\" set of permissions such as 700.
.It Fl n
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
Assume a no response to all questions asked by
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
except for
.Ql CONTINUE? ,
which is assumed to be affirmative;
do not open the filesystem for writing.
.It Fl p
fsck_lfs can now write to the filesystem, allowing it to correct most (though still not all) errors in a damaged lfs. Segment byte accounting is corrected in pass 5. "fsck_lfs -p" will do a partial roll-forward, verifying the checkpoint from the newer superblock. fscknames[] is updated so that fsck knows about fsck_lfs.
2000-05-16 08:55:58 +04:00
Specify ``preen'' mode. Currently, in this mode
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
fsck_lfs can now write to the filesystem, allowing it to correct most (though still not all) errors in a damaged lfs. Segment byte accounting is corrected in pass 5. "fsck_lfs -p" will do a partial roll-forward, verifying the checkpoint from the newer superblock. fscknames[] is updated so that fsck knows about fsck_lfs.
2000-05-16 08:55:58 +04:00
simply checks validity of the newer checkpoint.
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.It Fl y
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
Assume a yes response to all questions asked by
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm "" ;
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
this should be used with great caution as this is a free license
to continue after essentially unlimited trouble has been encountered.
.El
.Pp
.Bl -enum -indent indent -compact
Inconsistencies checked are as follows:
.It
fsck_lfs can now write to the filesystem, allowing it to correct most (though still not all) errors in a damaged lfs. Segment byte accounting is corrected in pass 5. "fsck_lfs -p" will do a partial roll-forward, verifying the checkpoint from the newer superblock. fscknames[] is updated so that fsck knows about fsck_lfs.
2000-05-16 08:55:58 +04:00
Blocks claimed by more than one inode.
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.It
Blocks claimed by an inode outside the range of the filesystem.
.It
Incorrect link counts.
.It
Size checks:
.Bl -item -indent indent -compact
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
.It
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
Directory size not a multiple of DIRBLKSIZ.
.It
Partially truncated file.
.El
.It
Bad inode format.
.It
Directory checks:
.Bl -item -indent indent -compact
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
.It
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
File pointing to unallocated inode.
.It
Inode number out of range.
.It
Dot or dot-dot not the first two entries of a directory
or having the wrong inode number.
.El
.It
Super Block checks:
.Bl -item -indent indent -compact
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
.It
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
More blocks for inodes than there are in the filesystem.
.It
fsck_lfs can now write to the filesystem, allowing it to correct most (though still not all) errors in a damaged lfs. Segment byte accounting is corrected in pass 5. "fsck_lfs -p" will do a partial roll-forward, verifying the checkpoint from the newer superblock. fscknames[] is updated so that fsck knows about fsck_lfs.
2000-05-16 08:55:58 +04:00
Segment block counts incorrect, or ``clean'' segments containing live data.
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.El
.El
.Pp
Orphaned files and directories (allocated but unreferenced) are,
with the operator's concurrence, reconnected by
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
placing them in the
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.Pa lost+found
directory.
The name assigned is the inode number.
If the
.Pa lost+found
directory does not exist, it is created.
If there is insufficient space its size is increased.
.Pp
Because of inconsistencies between the block device and the buffer cache,
the raw device should always be used.
.Sh DIAGNOSTICS
Xref newfs_lfs instead of newlfs; whitespace fixes while I'm here.
2001-04-03 15:07:50 +04:00
The diagnostics produced by
fix up various .Nm abuses: - keep the case consistent between the actual name and what's referenced. e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence. - remove unnecessary `.Nm foo' after the first occurrence (except for using `.Nm ""' if there's stuff following, or for the 2nd and so on occurrences in a SYNOPSIS - use Sx, Ic, Li, Em, Sq, and Xr as appropriate
2000-11-07 09:43:24 +03:00
.Nm
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
are fully enumerated and explained in Appendix A of
.Rs
.%T "Fsck \- The UNIX File System Check Program"
.Re
Sort sections, use standard section headers.
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.Sh SEE ALSO
.Xr fstab 5 ,
.Xr fsck 8 ,
.Xr newfs_lfs 8 ,
.Xr reboot 8
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
.Sh HISTORY
The
.Nm
program was first made available in
.Nx 1.4 .
Sort sections, use standard section headers.
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.Sh AUTHORS
Initial checkin of fsck_lfs. This version cannot do any repair (-p flag does nothing, and one of -p or -n is required) but can be useful as a diagnostic tool.
1999-03-18 05:02:18 +03:00
Most of the
.Nm
program was taken from
.Xr fsck_ffs 8 ;
what was not was written by Konrad Schroder <perseant@hhhh.org>.
Sort sections, use standard section headers.
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.Sh BUGS
.Nm
cannot currently perform a full roll-forward, or correct all of the
errors that it can detect.