logindevperm(4) File Formats logindevperm(4)NAME
logindevperm, fbtab - login-based device permissions
SYNOPSIS
/etc/logindevperm
DESCRIPTION
The /etc/logindevperm file contains information that is used by
login(1) and ttymon(1M) to change the owner, group, and permissions of
devices upon logging into or out of a console device. By default, this
file contains lines for the keyboard, mouse, audio, and frame buffer
devices.
The owner of the devices listed in /etc/logindevperm is set to the
owner of the console by login(1). The group of the devices is set to
the owner's group specified in /etc/passwd. The permissions are set as
specified in /etc/logindevperm.
Fields are separated by TAB and/or SPACE characters. Blank lines and
comments can appear anywhere in the file; comments start with a hash‐
mark, ` # ', and continue to the end of the line.
The first field specifies the name of a console device (for example,
/dev/console). The second field specifies the permissions to which the
devices in the device_list field (third field) will be set. These per‐
missions must be expressed in octal format. For example, 0774. A
device_list is a colon-separated list of device names. A device name
must be a /dev link. A directory or logical name in the device name may
be either one of the following:
· a fully qualified name. For example, fbs.
· a regular expression. For example, [a-z0-9.]+ (see regexp(5) for
more information on regular expressions).
· a wildcard character "*" specifying all directory or node names
(except "." and ".."). For example, /dev/fbs/* specifies all frame
buffer devices.
Some examples of /etc/logindevperm file entries include:
/dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/[a-z0-9.]+
/dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/*
/dev/usb/[0-9a-f]+[.][0-9a-f]+/*/*
specify all ugen(7D) endpoints and status nodes.
Drivers may also be specified to limit the permission changes to minor
nodes owned by the specified drivers. For example,
/dev/console 0600 /dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/* \
driver=usb_mid,scsa2usb,usbprn # libusb devices
Due to the persistence of devfs(7FS) minor node management, the user
should be logged in as root if the list of minor nodes will be reduced
and the devices should all be plugged in.
Once the devices are owned by the user, their permissions and ownership
can be changed using chmod(1) and chown(1), as with any other user-
owned file.
Upon logout the owner and group of these devices will be reset by tty‐
mon(1M) to owner root and root's group as specified in /etc/passwd
(typically other). The permissions are set as specified in the
/etc/logindevperm file.
FILES
/etc/passwd File that contains user group information.
SEE ALSOchmod(1), chown(1), login(1), ttymon(1M), passwd(4), regexp(5),
ugen(7D)NOTES
/etc/logindevperm provides a superset of the functionality provided by
/etc/fbtab in SunOS 4.x releases.
SunOS 5.10 20 Mar 2006 logindevperm(4)
