DragonFly On-Line Manual Pages
HOTPLUGD(8) DragonFly System Manager's Manual HOTPLUGD(8)
hotplugd -- devices hot plugging monitor daemon
The hotplugd daemon uses devattr(3) acting on signaled events by execut-
ing the scripts in the /etc/hotplug directory.
Actions can be configured either for device attachment or detachment. On
device attachment the attach script is executed if it exists. On device
detachment the detach script is executed if it exists. In both cases two
parameters are passed to the scripts: the class and name of the attached
or detached device. The device class corresponds to the classes
described in the <sys/device.h> header file and can be one of the follow-
0 generic, no special info
1 CPU (carries resource utilization)
2 disk drive
3 network interface
4 tape device
5 serial line interface
Not all classes are really usable. For example, it's unlikely that a CPU
will be hotplugged.
The device name is the usual name, as found in /dev, e.g. da1.
/dev/hotplug Pseudo-device file.
/etc/hotplug Directory where the scripts to execute are located.
/etc/hotplug/attach Script to execute on device attachment.
/etc/hotplug/detach Script to execute on device detachment.
Sample attach script:
case $DEVCLASS in
# disk devices
disklabel=`/sbin/disklabel $DEVNAME 2>&1 | \
sed -n '/^label: /s/^label: //p'`
case $disklabel in
# Sony DSC camera
mount -o nodev,nosuid /dev/"$DEVNAME"i /mnt/camera
# network devices; requires hostname.$DEVNAME
sh /etc/netstart $DEVNAME
The hotplugd program first appeared in OpenBSD 3.6.
The hotplugd program was adapted to use devattr(3) in DragonFly 2.9.
The hotplugd program was written by Alexander Yurchenko
DragonFly 4.9 November 14, 2010 DragonFly 4.9