Manual: ntfssecaudit
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 system, and checks their con‐
sistency. 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 examination.
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 directory.
-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 (currently Windows attrib).
volume perms file
Sets the security parameters of file to perms. Perms is the Linux requested mode (rwx flags, expressed in oc‐
tal 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 re‐
quested 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 effective 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 descriptor 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 parameters 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
subdirectory of the root of the partition for which the mapping is to be defined. This will cause the owner‐
ship 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 let‐
ters 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
https://github.com/tuxera/ntfs-3g/wiki/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 development team on the ntfs-3g-devel@lists.sf.net ad‐
dress.
AUTHORS
ntfssecaudit has been developed by Jean-Pierre André.
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)