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