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- #!/bin/bash
- #
- # USB-specific hotplug policy agent.
- #
- # This should handle 2.2.18+ and 2.4.* USB hotplugging,
- # with a consistent framework for adding device and driver
- # specific treatments.
- #
- # Kernel USB hotplug params include:
- #
- # ACTION=%s [add or remove]
- # PRODUCT=%x/%x/%x
- # INTERFACE=%d/%d/%d
- # TYPE=%d/%d/%d
- #
- # And if usbfs (originally called usbdevfs) is configured, also:
- #
- # DEVFS=/proc/bus/usb
- # DEVICE=/proc/bus/usb/%03d/%03d
- #
- # This script then adds the variable:
- #
- # REMOVER=/var/run/usb/<some string unique to $DEVICE>
- #
- # This is the path where the script would like to find a remover, if
- # the target device needs one. This script is executed on remove if
- # it is executable when the remove happens.
- #
- # If usbfs is mounted on /proc/bus/usb, $DEVICE is a file which
- # can be read to get the device's current configuration descriptor.
- # (The "usbmodules" utility helps do that.)
- #
- # On systems using Linux 2.4.* kernels, be sure to use the right
- # modutils (2.4.2+). That ensures that hotplugging uses the list
- # of modules installed for your kernel, rather than the one that's
- # included here for use on systems without MODULE_DEVICE_TABLE
- # support.
- #
- #
- # HISTORY:
- #
- # 18-Jan-2002 fix match algorithm in usb_map_modules()
- # 14-Jan-2002 fix work around 2.2 brokeness of $PRODUCT
- # 09-Jan-2002 REMOVER for system without usbdevfs
- # 14-Mar-2001 Cleanup, bitmask the match_flags
- # 26-Feb-2001 Cleanup, support comments (Gioele Barabucci)
- # 23-Jan-2001 Update 2.2 handling; unfortunately there's no "feature
- # test" that can work robustly
- # 05-Jan-2001 Quick hack for kernel 2.4.0 and modutils 2.4.1
- # 03-Jan-2001 Initial version of "new" hotplug agent, using feedback
- # and contributions from Adam Richter, Ryan VanderBijl,
- # Norbert Preining, Florian Lohoff, David Brownell and
- # others. To replace the original /etc/usb/policy. (db)
- # 15-Feb-2001 Remove use of "<<" (Adam Richter)
- #
- # $Id: usb.agent,v 1.22 2002/04/01 21:15:24 dbrownell Exp $
- #
-
- if [ -f /etc/sysconfig/usb ]; then
- . /etc/sysconfig/usb
- fi
-
- cd /etc/hotplug
- . hotplug.functions
- # DEBUG=yes export DEBUG
-
- # generated by modutils, for current 2.4.x kernels
- MAP_CURRENT=$MODULE_DIR/modules.usbmap
-
- # used if MAP_CURRENT is missing; for 2.2.x kernels
- MAP_DISTMAP=$HOTPLUG_DIR/usb.distmap
-
- #
- # used for kernel drivers that don't show up in CURRENT or DISTMAP,
- # currently input drivers (joysticks, UPSs, etc) and usb storage;
- #
- MAP_HANDMAP=$HOTPLUG_DIR/usb.handmap
-
- #
- # used to run config scripts for user mode drivers (jPhoto, gPhoto2,
- # rio500 tools, etc) ... instead of naming kernel modules, it names
- # config scripts (which mustn't overlap with kernel modules). Those
- # could change $DEVICE permissions, etc.
- #
- MAP_USERMAP=$HOTPLUG_DIR/usb.usermap
-
-
- # accumulates list of modules we may care about
- DRIVERS=""
-
- if [ "$PRODUCT" = "" -o "$ACTION" = "" ]; then
- mesg Bad USB agent invocation
- exit 1
- fi
-
- # we can't "unset IFS" on bash1, so save a copy
- DEFAULT_IFS="$IFS"
-
- #
- # Each modules.usbmap format line corresponds to one entry in a
- # MODULE_DEVICE_TABLE(usb,...) declaration in a kernel file.
- #
- # Think of it as a database column with up to three "match specs"
- # to associate kernel modules with particular devices or classes
- # of device. The match specs provide a reasonably good filtering
- # mechanism, but some driver probe() routines need to provide
- # extra filtering.
- #
- declare -i usb_idVendor usb_idProduct usb_bcdDevice
- declare -i usb_bDeviceClass usb_bDeviceSubClass usb_bDeviceProtocol
- declare -i usb_bInterfaceClass usb_bInterfaceSubClass usb_bInterfaceProtocol
-
- usb_convert_vars ()
- {
- if [ "$AWK" = "" ]; then
- mesg "can't find awk!"
- exit 1
- fi
-
- # work around 2.2 brokenness
- # munges the usb_bcdDevice such that it is a integer rather
- # than a float: e.g. 1.0 become 0100
- PRODUCT=`echo $PRODUCT | sed -e "s+\.\([0-9]\)$+.\10+" -e "s/\.$/00/" \
- -e "s+/\([0-9]\)\.\([0-9][0-9]\)+/0\1\2+" \
- -e "s+/\([0-9][0-9]\)\.\([0-9][0-9]\)+/\1\2+"`
- set `echo $PRODUCT | $AWK -F/ '{print "0x" $1, "0x" $2, "0x" $3 }'` ''
- usb_idVendor=$1
- usb_idProduct=$2
- usb_bcdDevice=$3
-
- if [ "$TYPE" != "" ]; then
- IFS=/
- set $TYPE ''
- usb_bDeviceClass=$1
- usb_bDeviceSubClass=$2
- usb_bDeviceProtocol=$3
- IFS="$DEFAULT_IFS"
- else
- # out-of-range values
- usb_bDeviceClass=1000
- usb_bDeviceSubClass=1000
- usb_bDeviceProtocol=1000
- fi
-
- if [ "$INTERFACE" != "" ]; then
- IFS=/
- set $INTERFACE ''
- usb_bInterfaceClass=$1
- usb_bInterfaceSubClass=$2
- usb_bInterfaceProtocol=$3
- IFS="$DEFAULT_IFS"
- else
- # out-of-range values
- usb_bInterfaceClass=1000
- usb_bInterfaceSubClass=1000
- usb_bInterfaceProtocol=1000
- fi
- }
-
- declare -i USB_MATCH_VENDOR=0x0001
- declare -i USB_MATCH_PRODUCT=0x0002
- declare -i USB_MATCH_DEV_LO=0x0004
- declare -i USB_MATCH_DEV_HI=0x0008
- declare -i USB_MATCH_DEV_CLASS=0x0010
- declare -i USB_MATCH_DEV_SUBCLASS=0x0020
- declare -i USB_MATCH_DEV_PROTOCOL=0x0040
- declare -i USB_MATCH_INT_CLASS=0x0080
- declare -i USB_MATCH_INT_SUBCLASS=0x0100
- declare -i USB_MATCH_INT_PROTOCOL=0x0200
-
- #
- # stdin is "modules.usbmap" syntax
- # on return, all matching modules were added to $DRIVERS
- #
- usb_map_modules ()
- {
- # convert the usb_device_id fields to integers as we read them
- local line module
- declare -i match_flags
- declare -i idVendor idProduct bcdDevice_lo bcdDevice_hi
- declare -i bDeviceClass bDeviceSubClass bDeviceProtocol
- declare -i bInterfaceClass bInterfaceSubClass bInterfaceProtocol
-
- # look at each usb_device_id entry
- # collect all matches in $DRIVERS
-
- while read line
- do
- # comments are lines that start with "#" ...
- # be careful, they still get parsed by bash!
- case "$line" in
- \#*) continue ;;
- esac
-
- set $line
-
- module=$1
- match_flags=$2
-
- idVendor=$3
- idProduct=$4
- bcdDevice_lo=$5
- bcdDevice_hi=$6
-
- bDeviceClass=$7
- bDeviceSubClass=$8
- bDeviceProtocol=$9
-
- shift 9
- bInterfaceClass=$1
- bInterfaceSubClass=$2
- bInterfaceProtocol=$3
-
- : checkmatch $module
-
- : idVendor $idVendor $usb_idVendor
- if [ $USB_MATCH_VENDOR -eq $(( $match_flags & $USB_MATCH_VENDOR )) ] &&
- [ $idVendor -ne $usb_idVendor ]; then
- continue
- fi
-
- : idProduct $idProduct $usb_idProduct
- if [ $USB_MATCH_PRODUCT -eq $(( $match_flags & $USB_MATCH_PRODUCT )) ] &&
- [ $idProduct -ne $usb_idProduct ]; then
- continue
- fi
-
- : bcdDevice range $bcdDevice_hi $bcdDevice_lo actual $usb_bcdDevice
- if [ $USB_MATCH_DEV_LO -eq $(( $match_flags & $USB_MATCH_DEV_LO )) ] &&
- [ $usb_bcdDevice -lt $bcdDevice_lo ]; then
- continue
- fi
-
- # bcdDevice_lo <= bcdDevice <= bcdDevice_hi
- if [ $USB_MATCH_DEV_HI -eq $(( $match_flags & $USB_MATCH_DEV_HI )) ] &&
- [ $usb_bcdDevice -gt $bcdDevice_hi ]; then
- continue
- fi
-
- : bDeviceClass $bDeviceClass $usb_bDeviceClass
- if [ $USB_MATCH_DEV_CLASS -eq $(( $match_flags & $USB_MATCH_DEV_CLASS )) ] &&
- [ $bDeviceClass -ne $usb_bDeviceClass ]; then
- continue
- fi
- : bDeviceSubClass $bDeviceSubClass $usb_bDeviceSubClass
- if [ $USB_MATCH_DEV_SUBCLASS -eq $(( $match_flags & $USB_MATCH_DEV_SUBCLASS )) ] &&
- [ $bDeviceSubClass -ne $usb_bDeviceSubClass ]; then
- continue
- fi
- : bDeviceProtocol $bDeviceProtocol $usb_bDeviceProtocol
- if [ $USB_MATCH_DEV_PROTOCOL -eq $(( $match_flags & $USB_MATCH_DEV_PROTOCOL )) ] &&
- [ $bDeviceProtocol -ne $usb_bDeviceProtocol ]; then
- continue
- fi
-
- # NOTE: for now, this only checks the first of perhaps
- # several interfaces for this device.
-
- : bInterfaceClass $bInterfaceClass $usb_bInterfaceClass
- if [ $USB_MATCH_INT_CLASS -eq $(( $match_flags & $USB_MATCH_INT_CLASS )) ] &&
- [ $bInterfaceClass -ne $usb_bInterfaceClass ]; then
- continue
- fi
- : bInterfaceSubClass $bInterfaceSubClass $usb_bInterfaceSubClass
- if [ $USB_MATCH_INT_SUBCLASS -eq $(( $match_flags & $USB_MATCH_INT_SUBCLASS )) ] &&
- [ $bInterfaceSubClass -ne $usb_bInterfaceSubClass ]; then
- continue
- fi
- : bInterfaceProtocol $bInterfaceProtocol $usb_bInterfaceProtocol
- if [ $USB_MATCH_INT_PROTOCOL -eq $(( $match_flags & $USB_MATCH_INT_PROTOCOL )) ] &&
- [ $bInterfaceProtocol -ne $usb_bInterfaceProtocol ]; then
- continue
- fi
-
- # It was a match!
- DRIVERS="$module $DRIVERS"
- : drivers $DRIVERS
- done
- }
-
- #
- # declare a REMOVER name that the add action can use to create a
- # remover, or that the remove action can use to execute a remover.
- #
- if [ "$DEVICE" = "" ]; then
- declare -rx REMOVER=/var/run/usb/`echo "$INTERFACE/$PRODUCT/$TYPE" | sed -e 's;/;%;g'`
- else
- declare -rx REMOVER=/var/run/usb/`echo $DEVICE | sed -e 's;/;%;g'`
- fi
-
- #
- # What to do with this USB hotplug event?
- #
- case $ACTION in
-
- add)
- # Let the usb subsystem finish talking to the device, before we do
- # NOTE: This hack doesn't fix the real problem. It seems to be
- # needed for some HID devices because "usbmodules" does control
- # messaging, and the HCDs don't all queue such messages safely.
- sleep 3
-
- usb_convert_vars
-
- FOUND=false
- LABEL="USB product $PRODUCT"
-
- if [ -e "$REMOVER" ]; then
- rm -f "$REMOVER"
- fi
-
- # on 2.4 systems, modutils 2.4.2+ maintains MAP_CURRENT
- # ... otherwise we can't rely on it (sigh)
- case "$KERNEL" in
- 2.4.*|2.5.*)
- if [ -r $MAP_CURRENT ]; then
- load_drivers usb $MAP_CURRENT "$LABEL"
- echo load_drivers usb $MAP_DISTMAP "$LABEL" >> /tmp/tse23
- fi;;
- *)
- if [ -r $MAP_DISTMAP ]; then
- load_drivers usb $MAP_DISTMAP "$LABEL"
- echo load_drivers usb $MAP_DISTMAP "$LABEL" >> /tmp/tse23
- fi;;
- esac
- if [ "$DRIVERS" != "" ]; then
- FOUND=true
- fi
-
- # cope with special driver module configurations
- # (mostly HID devices, until input can hotplug)
- if [ -r $MAP_HANDMAP ]; then
- load_drivers usb $MAP_HANDMAP "$LABEL"
- if [ "$DRIVERS" != "" ]; then
- FOUND=true
- fi
- fi
-
- # some devices have user-mode drivers (no kernel module, but config)
- # or specialized user-mode setup helpers
- if [ -r $MAP_USERMAP ]; then
- MODPROBE=:
- load_drivers usb $MAP_USERMAP "$LABEL"
- if [ "$DRIVERS" != "" ]; then
- FOUND=true
- fi
- fi
-
- if [ "$FOUND" = "false" ]; then
- mesg "... no modules for $LABEL"
- exit 2
- fi
-
- ;;
-
- remove)
- if [ -x $REMOVER ]; then
- $REMOVER
- fi
- rm -f $REMOVER
- ;;
-
- *)
- debug_mesg USB $ACTION event not supported
- exit 1
- ;;
-
- esac
-