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HOTPLUGD(8) System Manager's Manual HOTPLUGD(8)

NAME

hotplugddevices hot plugging monitor daemon

SYNOPSIS

hotplugd [-d device]

DESCRIPTION

The hotplugd daemon monitors the hotplug(4) pseudo-device, acting on signaled events by executing the scripts in the /etc/hotplug directory. By default it uses the /dev/hotplug device for reading events from, but an alternative device can be specified with the -d option.
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 following:
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 listed in MAKEDEV(8), and the unit number, e.g. sd1.

FILES

/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.

EXAMPLES

Sample attach script:
#!/bin/sh 
 
DEVCLASS=$1 
DEVNAME=$2 
 
case $DEVCLASS in 
2) 
	# disk devices 
	disklabel=`/sbin/disklabel $DEVNAME 2>&1 | \ 
	    sed -n '/^label: /s/^label: //p'` 
	case $disklabel in 
	Sony*DSC*) 
		# Sony DSC camera 
		mount -o nodev,nosuid /dev/"$DEVNAME"i /mnt/camera 
		;; 
	esac 
	;; 
3) 
	# network devices; requires hostname.$DEVNAME 
	sh /etc/netstart $DEVNAME 
	;; 
esac

SEE ALSO

hotplug(4)

HISTORY

The hotplugd program first appeared in OpenBSD 3.6.

AUTHORS

The hotplugd program was written by Alexander Yurchenko <grange@openbsd.org>.
July 27, 2015 OpenBSD-current