NAME    [Toc]    [Back]

     hotplugd - devices hot plugging monitor daemon

SYNOPSIS    [Toc]    [Back]

     hotplugd [-d device]

DESCRIPTION    [Toc]    [Back]

     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.  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 can be really usable, e.g. it's unlikely to
have a hot
     plug CPU.

     Device name is a usual name including unit number, e.g. sd1.

FILES    [Toc]    [Back]

     /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    [Toc]    [Back]

     Sample attach script:

           #!/bin/sh

           DEVCLASS=$1
           DEVNAME=$2

           case $DEVCLASS in
           2)
                   # disk devices

                   disklabel=`/sbin/disklabel  $DEVNAME  |   grep
'^label:' |                        sed -e 's/^label: //'`
                   case $disklabel in
                   Sony*DSC*)
                           # Sony DSC camera
                           mount /dev/"$DEVNAME"i /mnt/camera
                           ;;
                   esac

                   ;;
           3)
                   # network devices

                   /sbin/dhclient $DEVNAME

                   ;;
           esac

SEE ALSO    [Toc]    [Back]

     hotplug(4)

HISTORY    [Toc]    [Back]

     The hotplugd program first appeared in OpenBSD 3.6.

AUTHORS    [Toc]    [Back]

     The hotplugd program was written by Alexander Yurchenko
     <[email protected]>.

OpenBSD      3.6                          March      30,     2004