NTFSUSERMAPSection: Maintenance Commands (8)
Updated: February 2016
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NAMEntfsusermap - NTFS Building a User Mapping File
SYNOPSISntfsusermap windows-system-device [other-ntfs-device...]
Where windows-system-device is the device containing the Windows system whose users are to be mapped to current Linux system.
And other-ntfs-device is another device containing files which are to be accessed both by the Windows mentioned above and current Linux system.
the ntfsusermap command must be started as root, and the designated devices must not be mounted.
DESCRIPTIONntfsusermap creates the file defining the mapping of Windows accounts to Linux logins for users who owns files which should be visible from both Windows and Linux.
It relies on existing files which were created on Windows, trying to locate significant files and asking which Linux user or group should own them. When a Linux owner or group is requested, the reply may be :
- the uid or gid (numeric or symbolic) of Linux owner or group of the file.
- In that situation, no more file with the same Windows owner will be selected.
- In that situation another file owned by the same Windows user or group may be selected later so that a mapping can be defined.
The mappings for standard Windows users, such as "Administrator" or "All Users" are defined implicitly. As a consequence a user mapping should never be defined as Linux root.
When there are no more significant files, ntfsusermap create the mapping file into the file UserMapping in the current directory. This file has to be moved to the hidden directory .NTFS-3G in the root of all the NTFS file systems to be shared between Windows and Linux. This requires the file system to be mounted, but the created file will not be taken into account if not present at mount time, which means the file system has to be unmounted and mounted again for the new mapping file to be taken into account.
OPTIONSNo option is defined for ntfsusermap.
EXAMPLESMap the users defined on the Windows system present on /dev/sda1 :
A detailed example, with screen displays is available on http://jp-andre.pagesperso-orange.fr/ntfsusermap.html
EXIT CODESntfsusermap exits with a value of 0 when no error was detected, and with a value of 1 when an error was detected.
KNOWN ISSUESPlease see email@example.com address.
AUTHORSntfs-3g.secaudit has been developed by Jean-Pierre André.
THANKSSeveral 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 ALSOntfsprogs(8), attr(5), getfattr(1)
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