fbtab —
change device protection upon login
The
fbtab file contains lines which specify
how the permissions and ownership of various system files should be changed
based on the user's login device name.
Comments start with a ‘
#’ and extend to
the end of the line. Blank lines or lines with only a comment are ignored.
All other lines consist of three fields delimited by whitespace.
-
-
- Login Device
- The device you have logged in on (e.g., “/dev/ttyv0”).
-
-
- File Permission
- An octal permission number (0600), as used by
chmod(2).
-
-
- Other devices
- The final field is a colon (‘
:’)
delimited list of devices (e.g., “/dev/console:/dev/fd0a”).
All device names are absolute paths. A path that ends in
“/*” refers to all directory entries except
“.” and “..”.
The
fbtab file is used by
login(1) to
chown(2) the
specified files to the user who has performed a login. Additionally,
chmod(2) is used to
set the devices to the specified permission. When a user logs out,
init(8) is responsible
for performing the inverse operation, which results in the files once again
belonging to root.
- /etc/fbtab
-
login(1),
login_fbtab(3),
init(8)
Guido van Rooij
![[OpenBSD]](/openbsd.gif){kind=small}