FBTAB(5) - File Formats Manual #

FBTAB(5) - File Formats Manual

NAME #

fbtab - change device protection upon login

DESCRIPTION #

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 device paths (e.g., “/dev/console:/dev/fd0a:/dev/wskbd*”). Device paths may include shell-style globbing patterns (see glob(7)), potentially matching multiple devices.

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.

FILES #

/etc/fbtab

SEE ALSO #

login(1), login_fbtab(3), glob(7), init(8)

AUTHORS #

Guido van Rooij

OpenBSD 7.5 - April 21, 2022