08-06-2009
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The UNIX and Linux Forums
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devfsadm(1M) System Administration Commands devfsadm(1M)
NAME
devfsadm, devfsadmd - administration command for /dev
SYNOPSIS
/usr/sbin/devfsadm [-C] [-c device_class] [-i driver_name] [ -n] [-r root_dir] [-s] [-t table_file] [-v]
/usr/lib/devfsadm/devfsadmd
DESCRIPTION
devfsadm(1M) maintains the /dev namespace. It replaces the previous suite of devfs administration tools including drvconfig(1M), disks(1M),
tapes(1M), ports(1M), audlinks(1M), and devlinks(1M).
The default operation is to attempt to load every driver in the system and attach to all possible device instances. Next, devfsadm creates
logical links to device nodes in /dev and /devices and loads the device policy.
devfsadmd(1M) is the daemon version of devfsadm(1M). The daemon is started during system startup and is responsible for handling both
reconfiguration boot processing and updating /dev and /devices in response to dynamic reconfiguration event notifications from the kernel.
For compatibility purposes, drvconfig(1M), disks(1M), tapes(1M), ports(1M), audlinks(1M), and devlinks(1M) are implemented as links to
devfsadm.
In addition to managing /dev, devfsadm also maintains the path_to_inst(4) database.
OPTIONS
The following options are supported:
-C Cleanup mode. Prompt devfsadm to cleanup dangling /dev links that are not normally removed. If the -c option is
also used, devfsadm only cleans up for the listed devices' classes.
-c device_class Restrict operations to devices of class device_class. Solaris defines the following values for device_class: disk,
tape, port, audio, and pseudo. This option might be specified more than once to specify multiple device classes.
-i driver_name Configure only the devices for the named driver, driver_name.
-n Do not attempt to load drivers or add new nodes to the kernel device tree.
-s Suppress any changes to /dev. This is useful with the -v option for debugging.
-t table_file Read an alternate devlink.tab file. devfsadm normally reads /etc/devlink.tab.
-r root_dir Presume that the /dev directory trees are found under root_dir, not directly under root (/). No other use or
assumptions are made about root_dir.
-v Print changes to /dev in verbose mode.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
1 An error occurred.
FILES
/devices device nodes directory
/dev logical symbolic links to /devices
/usr/lib/devfsadm/devfsadmd devfsadm daemon
/dev/.devfsadm_dev.lock update lock file
/dev/.devfsadm_daemon.lock daemon lock file
/etc/security/device_policy device policy file
/etc/security/extra_privs additional device privileges
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
svcs(1), add_drv(1M), modinfo(1M), modload(1M), modunload(1M), rem_drv(1M), svcadm(1M), tapes(1M), path_to_inst(4), attributes(5), privi-
leges(5), smf(5), devfs(7FS)
NOTES
This document does not constitute an API. The /devices directory might not exist or might have different contents or interpretations in a
future release. The existence of this notice does not imply that any other documentation that lacks this notice constitutes an API.
devfsadm no longer manages the /devices name space. See devfs(7FS).
The device configuration service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/device/local:default
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
SunOS 5.10 6 Aug 2004 devfsadm(1M)