FBTAB(5) BSD File Formats Manual FBTAB(5)
fbtab -- change device protection upon login
The fbtab file contains lines which specify how the permissions and own-
ership 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.,
File Permission An octal permission number (0600), as used by
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.
login(1), login_fbtab(3), init(8)
Guido van Rooij
BSD May 29, 2017 BSD