cmd/zpool_id/zpool_id

   1 #!/bin/bash
   2
   3 CONFIG=${CONFIG:-/etc/zfs/zdev.conf}
   4 PATH_ID=${PATH_ID:-/lib/udev/path_id}
   5 AWK=${AWK:-/bin/awk}
   6
   7 die() {
   8         echo "Error: $*"
   9         exit 1
  10 }
  11
  12 usage() {
  13         cat << EOF
  14 Usage: zpool_id [h] [-c configfile] <devpath>
  15   -c    Alternate config file [default /etc/zfs/zdev.conf]
  16   -d    Use path_id from device as the mapping key
  17   -h    Show this message
  18 EOF
  19         exit 1
  20 }
  21
  22 while getopts 'c:d:h' OPTION; do
  23         case ${OPTION} in
  24         c)
  25                 CONFIG=${OPTARG}
  26                 ;;
  27         d)
  28                 DEVICE=${OPTARG}
  29                 ;;
  30         h)
  31                 usage
  32                 ;;
  33         esac
  34 done
  35
  36 # Check that a device was requested
  37 [ -z ${DEVICE} ] && usage
  38
  39 # Check for the existence of a configuration file
  40 [ ! -f ${CONFIG} ] && die "Missing config file: ${CONFIG}"
  41
  42 # Use udev's path_id to generate a unique persistent key
  43 eval `${PATH_ID} ${DEVICE}`
  44 [ -z ${ID_PATH} ] && die "Missing ID_PATH for ${DEVICE}"
  45
  46 # Use the persistent key to lookup the zpool device id in the
  47 # configuration file which is of the format <device id> <key>.
  48 # Lines starting with #'s are treated as comments and ignored.
  49 # Exact matches are required, wild cards are not supported,
  50 # and only the first match is returned.
  51 ID_ZPOOL=`${AWK} "/${ID_PATH}\>/ && !/^#/ { print \\$1; exit }" ${CONFIG}`
  52 [ -z ${ID_ZPOOL} ] && die "Missing ID_ZPOOL for ID_PATH: ${ID_PATH}"
  53
  54 if [ ${ID_ZPOOL} ]; then
  55         echo "ID_PATH=${ID_PATH}"
  56         echo "ID_ZPOOL=${ID_ZPOOL}"
  57         echo "ID_ZPOOL_PATH=disk/zpool/${ID_ZPOOL}"
  58 fi
  59
  60 exit 0