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


NAME

     hotplugd -- devices hot plugging monitor daemon


SYNOPSIS

     hotplugd


DESCRIPTION

     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-
     ing:

           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.


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

     devattr(3)


HISTORY

     The hotplugd program first appeared in OpenBSD 3.6.

     The hotplugd program was adapted to use devattr(3) in DragonFly 2.9.


AUTHORS

     The hotplugd program was written by Alexander Yurchenko
     <grange@openbsd.org>.

DragonFly 3.5                  November 14, 2010                 DragonFly 3.5

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