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NTFSSECAUDIT(8) System Manager's Manual NTFSSECAUDIT(8)
NAME
ntfssecaudit - NTFS Security Data Auditing
SYNOPSIS
ntfssecaudit [options] args
Where options is a combination of :
-a full auditing of security data (Linux only)
-b backup ACLs
-e setting extra backed-up parameters (in conjunction with -s)
-h displaying hexadecimal security descriptors saved in a file
-r recursing in a directory
-s setting backed-up ACLs
-u getting a user mapping proposal
-v verbose (very verbose if set twice)
and args define the parameters and the set of files acted upon.
Typing secaudit with no args will display a summary of available options.
DESCRIPTION
ntfssecaudit displays the ownership and permissions of a set of files on an NTFS file sys-
tem, and checks their consistency. It can be started in terminal mode only (no graphical
user interface is available.)
When a volume is required, it has to be unmounted, and the command has to be issued as
root. The volume can be either a block device (i.e. a disk partition) or an image file.
When acting on a directory or volume, the command may produce a lot of information. It is
therefore advisable to redirect the output to a file or pipe it to a text editor for exam-
ination.
OPTIONS
Below are the valid combinations of options and arguments that ntfssecaudit accepts. All
the indicated arguments are mandatory and must be unique (if wildcards are used, they must
resolve to a single name.)
-h file
Displays in an human readable form the hexadecimal security descriptors saved in
file. This can be used to turn a verbose output into a very verbose output.
-a[rv] volume
Audits the volume : all the global security data on volume are scanned and errors
are displayed. If option -r is present, all files and directories are also scanned
and their relations to global security data are checked. This can produce a lot of
data.
This option is not effective on volumes formatted for old NTFS versions (pre NTFS
3.0). Such volumes have no global security data.
When errors are signalled, it is advisable to repair the volume with an appropriate
tool (such as chkdsk on Windows.)
[-v] volume file
Displays the security parameters of file : its interpreted Linux mode (rwx flags in
octal) and Posix ACL[1], its security key if any, and its security descriptor if
verbose output.
-r[v] volume directory
displays the security parameters of all files and subdirectories in directory :
their interpreted Linux mode (rwx flags in octal) and Posix ACL[1], their security
key if any, and their security descriptor if verbose output.
-b[v] volume [directory]
Recursively extracts to standard output the NTFS ACLs of files in volume and direc-
tory.
-s[ev] volume [backup-file]
Sets the NTFS ACLS as indicated in backup-file or standard input. The input data
must have been created on Linux. With option -e, also sets extra parameters (cur-
rently Windows attrib).
volume perms file
Sets the security parameters of file to perms. Perms is the Linux requested mode
(rwx flags, expressed in octal form as in chmod) or a Posix ACL[1] (expressed like
in setfacl -m). This sets a new ACL which is effective for Linux and Windows.
-r[v] volume perms directory
Sets the security parameters of all files and subdirectories in directory to perms.
Perms is the Linux requested mode (rwx flags, expressed in octal form as in chmod),
or a Posix ACL[1] (expressed like in setfacl -m.) This sets new ACLs which are ef-
fective for Linux and Windows.
[-v] mounted-file
Displays the security parameters of mounted-file : its interpreted Linux mode (rwx
flags in octal) and Posix ACL[1], its security key if any, and its security de-
scriptor if verbose output. This is a special case which acts on a mounted file (or
directory) and does not require being root. The Posix ACL interpretation can only
be displayed if the full path to mounted-file from the root of the global file tree
is provided.
-u[v] mounted-file
Displays a proposed contents for a user mapping file, based on the ownership param-
eters set by Windows on mounted-file, assuming this file was created on Windows by
the user who should be mapped to the current Linux user. The displayed information
has to be copied to the file .NTFS-3G/UserMapping where .NTFS-3G is a hidden subdi-
rectory of the root of the partition for which the mapping is to be defined. This
will cause the ownership of files created on that partition to be the same as the
original mounted-file.
NOTE
[1] provided the POSIX ACL option was selected at compile time. A Posix ACL specification
looks like "[d:]{ugmo}:[id]:[perms],..." where id is a numeric user or group id, and perms
an octal digit or a set from the letters r, w and x.
Example : "u::7,g::5,o:0,u:510:rwx,g:500:5,d:u:510:7"
EXAMPLES
Audit the global security data on /dev/sda1
ntfssecaudit -ar /dev/sda1
Display the ownership and permissions parameters for files in directory /audio/music on
device /dev/sda5, excluding sub-directories :
ntfssecaudit /dev/sda5 /audio/music
Set all files in directory /audio/music on device /dev/sda5 as writeable by owner and
read-only for everybody :
ntfssecaudit -r /dev/sda5 644 /audio/music
EXIT CODES
ntfssecaudit exits with a value of 0 when no error was detected, and with a value of 1
when an error was detected.
KNOWN ISSUES
Please see
http://www.tuxera.com/community/ntfs-3g-faq/
for common questions and known issues. If you would find a new one in the latest release
of the software then please send an email describing it in detail. You can contact the de-
velopment team on the ntfs-3g-devel AT lists.net address.
AUTHORS
ntfssecaudit has been developed by Jean-Pierre Andre.
THANKS
Several people made heroic efforts, often over five or more years which resulted the
ntfs-3g driver. Most importantly they are Anton Altaparmakov, Richard Russon, Szabolcs
Szakacsits, Yura Pakhuchiy, Yuval Fledel, and the author of the groundbreaking FUSE
filesystem development framework, Miklos Szeredi.
SEE ALSO
ntfsprogs(8), attr(5), getfattr(1)
ntfssecaudit 1.5.0 February 2010 NTFSSECAUDIT(8)
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