.\"	$OpenBSD: ncheck_ffs.8,v 1.27 2020/02/08 17:25:25 schwarze Exp $
.\"
.\" Copyright (c) 1995, 1996 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
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.Dd $Mdocdate: February 8 2020 $
.Dt NCHECK_FFS 8
.Os
.Sh NAME
.Nm ncheck_ffs ,
.Nm ncheck
.Nd generate names from inode-numbers
.Sh SYNOPSIS
.Nm ncheck_ffs
.Op Fl ams
.Op Fl f Ar format
.Op Fl i Ar number ...
.Ar filesystem
.Sh DESCRIPTION
.Nm
generates a list of filenames and inode numbers for the given
file system.
Names of directories are followed by a
.Sq \&. .
.Nm
may be invoked more simply as
.Nm ncheck ,
with no change in behaviour.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl a
Print the file names
.Sq \&.
and
.Sq .. ,
which are ordinarily skipped.
.It Fl f Ar format
Use a custom output format when printing inode information.
Characters from
.Ar format
are printed for each inode with the following escape sequences:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It Cm \ea
Print a
.Aq bell
character.
.It Cm \eb
Print a
.Aq backspace
character.
.It Cm \ee
Print an
.Aq escape
character.
.It Cm \ef
Print a
.Aq form-feed
character.
.It Cm \eI
Print the inode number.
.It Cm \en
Print a
.Aq new-line
character.
.It Cm \eP
Print the pathname to the file using the current inode number.
.It Cm \er
Print a
.Aq carriage return
character.
.It Cm \et
Print a
.Aq tab
character.
.It Cm \ev
Print a
.Aq vertical tab
character.
.It Cm \e\(aq
Print a
.Aq single quote
character.
.It Cm \e\e
Print a backslash character.
.It Cm \e0
Print a NUL character.
.El
.Pp
All other characters, when prefixed by a backslash, simply print
the character following the backslash.
The device name is not printed on the first line of output when the
.Fl f
option is specified.
.It Fl i Ar number ...
Report only those files whose inode numbers are as listed.
.It Fl m
Give more verbose information on inodes.
.It Fl s
Report only special files and files with set-user-ID or set-group-ID
set.
This is meant to find hidden violations of security policies.
.El
.Pp
The report is not sorted.
.Sh SEE ALSO
.Xr sort 1 ,
.Xr fsck 8 ,
.Xr fsdb 8
.Sh HISTORY
An
.Nm ncheck
command appeared in
.At v6 .
The
.Nm
command was designed to be similar in functionality to the corresponding
command in SunOS 4.1.3.
.Sh AUTHORS
.An Thorsten Lockert Aq Mt tholo@sigmasoft.com