--- /dev/null
+#!/bin/sh
+#set -x
+
+# this script should provide the shortest possible unique hardware path
+# to a block device
+#
+
+# Horrible script. Handle with extreme care.
+
+# to be called from udev
+# DEVPATH=/block/sda/sda3 $0 (or similar)
+# $0 /block/sda
+# $0 /sys/block/sda
+
+# example for all:
+# for i in `find /sys/block -name dev` ;do DEVPATH="`echo $i | sed -e 's@^/sys\|/dev@@g'`" $0 ; done
+
+# examples:
+# SCSI cdrom
+# /block/sr0 -> /devices/pci0002:30/0002:30:0c.0/host0/0:0:1:0
+# result: pci-0002:30:0c.0-scsi-0:0:1:0
+# SCSI disk
+# /block/sda -> /devices/pci0002:30/0002:30:0c.0/host0/0:0:4:0
+# result: pci-0002:30:0c.0-scsi-0:0:4:0
+# SATA disk, 4 channels per controller
+# /block/sda -> /devices/pci0001:00/0001:00:07.0/0001:05:0c.0/host0/0:0:0:0
+# result: pci-0001:05:0c.0-scsi-0:0:0:0
+# IDE disk
+# /block/hda -> /devices/pci0002:02/0002:02:0d.0/ide0/0.0
+# result: pci-0002:02:0d.0-ide-0.0
+# IDE cdrom on a Mac ASIC:
+# /block/hdc -> /devices/pci0001:01/0001:01:17.0/0.80000000:mac-io/0.00020000:ata-3/ide1/1.0
+# result: mac-io_ata-3_master
+# IDE cdrom on a Mac ASIC, with ide-scsi:
+# /block/sr0 -> /devices/pci0001:01/0001:01:17.0/0.80000000:mac-io/0.0001f000:ata-4/ide0/0.1/host2/2:0:0:0
+# result: mac-io_ata-4_slave
+
+# USB CDrom drive without 'serial' number:
+# reusing 'product' and 'manufacturer' string, if available
+# /block/sr0 -> /devices/pci0001:00/0001:00:04.0/0001:02:0b.0/usb4/4-2/4-2:1.0/host4/4:0:0:0
+# result: usb-storage-odd-Freecom-USIDERev930:0:0:0
+
+# devices may have several interfaces on one PCI device, like IDE:
+# pci-0001:00:04.0_ide1-master
+# pci-0001:00:04.0_ide2-master
+# pci-0001:00:04.0_ide2-slave
+# they are marked as ports, it is expected that the driver shows
+# ide1 even if there is nothing connected to either master or slave
+# interface
+#
+# match order is important.
+# first IDE to find ide-scsi devices.
+# then SCSI
+# first usb-storage
+# then firewire sbp2
+# then the rest
+
+PATH=/lib/klibc/bin #/usr:/usr/sbin:/usr/bin:/sbin:/bin
+SYSFS=/sys
+export PATH
+RESULT=1
+CDROM=
+TYPE=
+OPWD="`pwd`"
+# Check for 'pwd -P'
+if $(pwd -P > /dev/null 2>&1); then
+ pwd_cmd="pwd -P"
+else
+ pwd_cmd="pwd"
+fi
+full_sysfs_class_path=
+full_sysfs_device_path=
+
+if [ -z "$DEVPATH" -a -z "$1" ] ; then
+ exit 1
+fi
+
+if [ -z "$DEVPATH" ] ; then
+ case "$1" in
+ $SYSFS/*)
+ DEVPATH="${1#$SYSFS}"
+ ;;
+ *)
+ DEVPATH=$1
+ ;;
+ esac
+fi
+
+if [ ! -d $SYSFS$DEVPATH ] ; then
+ exit 1
+fi
+if [ ! -f $SYSFS$DEVPATH/dev ] ; then
+ exit 1
+fi
+
+case "$DEVPATH" in
+ /block/*)
+ TYPE=block
+ ;;
+ /class/*)
+ TYPE="${DEVPATH#/class/}"
+ TYPE="${TYPE%%/*}"
+ ;;
+ *)
+ exit 1
+ ;;
+esac
+
+#
+##
+#
+
+get_port () {
+ local type offset port
+ type=$1
+ offset=$2
+ for i in $type[0-9]* ; do
+ : i $i
+ port="${i#$type}"
+ if [ "$port" -lt "$offset" ] ; then offset=$port ; fi
+ done
+ if [ "$port" != "0" ] ; then
+ echo $(($2 - $offset))
+ fi
+}
+
+handle_block_ide () {
+: handle_block_ide $*
+ local DEV=$1
+ local port idedev idecontroller
+ # IDE
+ : DEV $DEV
+ d=$DEV
+ case "$DEV" in
+ # remove ide-scsi part, leave only channel info
+ */ide[0-9]*/host[0-9]*)
+ while [ ! -z "$d" ] ; do
+ case "$d" in
+ */host[0-9]*)
+ d="${d%/*}"
+ continue
+ ;;
+ *)
+ break
+ ;;
+ esac
+ done
+ ;;
+ esac
+ idedev=$d
+ while [ ! -z "$d" ] ; do
+ case "$d" in
+ */ide[0-9]*)
+ port="${d##*/}"
+ d="${d%/*}"
+ continue
+ ;;
+ *)
+ break
+ ;;
+ esac
+ done
+ idecontroller=$d
+ # port info if the controller has more than one interface
+ port="${port#ide}"
+ : port $port d $d
+ : idedev $idedev kernel_port $port
+ case "${idedev##*.}" in
+ 0)
+ channel=0
+ ;;
+ 1)
+ channel=1
+ ;;
+ *)
+ echo "Error: $idedev is neither master or slave" >&2
+ esac
+ case "$d" in
+ *:mac-io/*)
+ : mac-io: $d
+ d="`echo $d | sed -e 's@^.*:mac-io[^:]\+:\([^/]\+\).*@mac-io_\1@'`"
+ ;;
+ /sys/devices)
+ # PCMCIA devices
+ ifname=${full_sysfs_class_path##*/}
+ set -- `sed -n "/$ifname/p" /var/lib/pcmcia/stab`
+ d="pcmcia-$1"
+ ;;
+ *)
+ d="pci-${d##*/}"
+ # d="`echo $d | sed -e 's@^.*/\([^/]\{1,\}\)/.@pci-\1@'`"
+ ;;
+ esac
+
+ cd $idecontroller
+ port="`get_port ide $port`"
+ cd "$OPWD"
+ : hardware_port $port
+ if [ -z "$port" ] ; then
+ d="${d}-ide-0:$channel"
+ else
+ d="${d}-ide-${port}:$channel"
+ fi
+
+ RESULT=0
+}
+
+handle_block_scsi () {
+: handle_block_scsi $*
+ local DEV=$1
+ local cil controller_port controller_dev
+ # SCSI device
+ cil="${DEV##*/}"
+ cil="${cil#*:}"
+ controller_dev=$DEV
+ while [ ! -z "$controller_dev" ] ; do
+ case "$controller_dev" in
+ */host[0-9]*)
+ controller_port=$controller_dev
+ controller_dev="${controller_dev%/*}"
+ ;;
+ *) break ;;
+ esac
+ done
+ : controller_dev $controller_dev
+ : controller_port $controller_port
+ # a host controller may have more than one interface/port
+ controller_port="${controller_port##*/}"
+ controller_port="${controller_port##host}"
+ #
+ case "$controller_dev" in
+ # grand central, old powermacs
+ *:gc/*)
+ adapter="`echo $controller_dev | sed -e 's@/[^/]\{1,\}$@@;s@^.*/@@;s@^.*:@@'`"
+ bus="gc"
+ ;;
+ *)
+ adapter="${controller_dev##*/}"
+ bus="pci"
+ ;;
+ esac
+ cd "$controller_dev"
+ controller_port="`get_port host $controller_port`"
+ cd "$OPWD"
+ d="$bus-$adapter"
+ if [ -z "$controller_port" ] ; then
+ controller_port=0
+ fi
+ d="${d}-scsi-${controller_port}:${cil}"
+ RESULT=0
+}
+
+handle_block_usb_storage () {
+: handle_block_usb_storage $*
+ local DEV=$1
+ cil="${DEV##*/}"
+ cil="${cil#*:}"
+ controller_dev=$DEV
+ while [ ! -z "$controller_dev" ] ; do
+ case "$controller_dev" in
+ */host[0-9]*)
+ controller_dev="${controller_dev%/*}"
+ ;;
+ *) break ;;
+ esac
+ done
+ : controller_dev $controller_dev
+ #
+ # usb-storage devs have a serial number, hopefully unique
+ serial=
+ if [ -f $controller_dev/../serial ] ; then
+ serial="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../serial`"
+ : serial XXX_${serial}_XXX
+ d="usb-$serial"
+ serial="`echo $serial | sed -e 's@[ 0]\{1,\}@@g'`"
+ fi
+ if [ -z "$serial" ] ; then
+ # no serial, broken device
+ # has eventually binary junk in vpd
+ identifier=
+ if [ -f $controller_dev/../product ] ; then
+ product="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../product`"
+ fi
+ if [ -f $controller_dev/../manufacturer ] ; then
+ manufacturer="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../manufacturer`"
+ fi
+ if [ -z "$product" -o -z "$manufacturer" ] ; then
+ read idvendor < $controller_dev/../idVendor
+ read idproduct < $controller_dev/../idProduct
+ identifier="0x${idvendor}-0x${idproduct}"
+ else
+ identifier="${manufacturer}-${product}"
+ fi
+ d="usb-${identifier}"
+ fi
+ d="$d:$cil"
+ RESULT=0
+
+
+}
+
+handle_block () {
+ full_sysfs_class_path="$SYSFS$DEVPATH"
+ if [ ! -f $full_sysfs_class_path/dev ] ; then return ; fi
+ # the main device has (hopefully) a symlink to the real device
+ # a partition is a subdir of the main (raw) device
+ if [ ! -L $full_sysfs_class_path/device ] ; then
+ if [ -f $full_sysfs_class_path/range ] ; then return ; fi
+ full_sysfs_class_path="${full_sysfs_class_path%/*}"
+ : full_sysfs_class_path "$full_sysfs_class_path"
+ if [ ! -L $full_sysfs_class_path/device -o ! -f $full_sysfs_class_path/dev ] ; then
+ return
+ fi
+ fi
+ cd $full_sysfs_class_path/device
+ full_sysfs_device_path="`$pwd_cmd`"
+ cd "$OPWD"
+ D=$full_sysfs_device_path
+ case "$D" in
+ */ide[0-9]/[0-9].[0-9]*|*/ide[0-9][0-9]/[0-9][0-9].[0-9]*)
+ handle_block_ide "$D"
+ ;;
+ */usb[0-9]*/[0-9]*/host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*)
+ handle_block_usb_storage "$D"
+ ;;
+ */css0/*)
+ if [ -r $full_sysfs_device_path/wwpn ]; then
+ read wwpn < $full_sysfs_device_path/wwpn
+ fi
+ if [ -r $full_sysfs_device_path/fcp_lun ]; then
+ read lun < $full_sysfs_device_path/fcp_lun
+ fi
+ if [ -r $full_sysfs_device_path/hba_id ]; then
+ read bus_id < $full_sysfs_device_path/hba_id
+ fi
+ if [ "$bus_id" -a "$wwpn" -a "$lun" ]; then
+ # S/390 zfcp adapter
+ d="ccw-$bus_id-zfcp-$wwpn:$lun"
+ RESULT=0
+ else
+ # DASD devices
+ bus="ccw"
+ adapter=${D##*/}
+ d="$bus-$adapter"
+ RESULT=0
+ fi
+ ;;
+ */host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*)
+ # check for ieee1394 sbp2
+ if test -f $D/ieee1394_id ; then
+ read ieee1394_id < $D/ieee1394_id
+ d="`echo ieee1394-${ieee1394_id} | sed -e 's@:@-@g'`"
+ RESULT=0
+ else
+ handle_block_scsi "$D"
+ fi
+ ;;
+
+ *)
+ : not handled
+ RESULT=1
+ return
+
+ ;;
+ esac
+ # look for a partition
+ if [ "$full_sysfs_class_path" != "$SYSFS$DEVPATH" ] ; then
+ dp="`echo $SYSFS$DEVPATH | sed -e 's@^/.*/@@;s@^[^0-9]\{1,\}@@;s@.*_@@'`"
+ case "$d" in
+ *[0-9])
+ d="${d}p${dp}"
+ ;;
+ *)
+ d="${d}${dp}"
+ ;;
+ esac
+ fi
+ # done
+ echo "ID_PATH=$d"
+}
+
+case "$TYPE" in
+ block)
+ handle_block
+ ;;
+ *)
+ RESULT=1
+ ;;
+esac
+exit $RESULT
~ianmdlvl / elogind.git / commitdiff