2004-01-02 Automate change of permissions on USB connected digital cameras

• When an USB device gets plugged in, the permissions on it's device file are default rw-r--r--. Therefore, as ordinary user, you cannot use this device properly. This turns out to be a problem when it comes to devices such as digital cameras.
• the solution :
  You can put a usermap in /etc/hotplug/usb/ which causes particular devices (distinguished by its manufacturer & device ids) to run a custom script when they get plugged in.
  /etc/hotplug/usb/usbcam.usermap for my CANON Digital IXUS 400 camera:
  # Canon digital IXUS 400 usbcam 0x0003 0x04a9 0x3075 0x0000 0x0000 0x00 0x00 0x00 0x00 0x00 0x00 0x00000000
  The first field refers to a script, /etc/hotplug/usb/usbcam that gets executed on hotplug events.
  #!/bin/sh /usr/bin/logger -p kern.info "e-circ: usb-camera event, device=${DEVICE}, action=${ACTION}" case "${ACTION}" in "add") /bin/chmod a+w ${DEVICE} ;; *) ;; esac
  It appears that only the add event is passed to this scipt.
  The documentation refers to this method as
  # # used to run config scripts for user mode drivers (jPhoto, gPhoto2, # rio500 tools, etc) ... instead of naming kernel modules, it names # config scripts. those could change $DEVICE permissions, etc. # # for purely user mode drivers, scripts $HOTPLUG_DIR/usb/NAME should be # installed with usermap files in $HOTPLUG_DIR/usb/NAME.usermap instead # of continuing to use/modify $MAP_USERMAP #