cmd/zpool/zpool.d/lsblk

   1 #!/bin/sh
   2 #
   3 # Print some common lsblk values
   4 #
   5 # Any (lowercased) name symlinked to the lsblk script will be passed to lsblk
   6 # as one of its --output names.  Here's a partial list of --output names
   7 # from the lsblk binary:
   8 #
   9 # Available columns (for --output):
  10 #        NAME  device name
  11 #       KNAME  internal kernel device name
  12 #     MAJ:MIN  major:minor device number
  13 #      FSTYPE  filesystem type
  14 #  MOUNTPOINT  where the device is mounted
  15 #       LABEL  filesystem LABEL
  16 #        UUID  filesystem UUID
  17 #          RA  read-ahead of the device
  18 #          RO  read-only device
  19 #          RM  removable device
  20 #       MODEL  device identifier
  21 #        SIZE  size of the device
  22 #       STATE  state of the device
  23 #       OWNER  user name
  24 #       GROUP  group name
  25 #        MODE  device node permissions
  26 #   ALIGNMENT  alignment offset
  27 #      MIN-IO  minimum I/O size
  28 #      OPT-IO  optimal I/O size
  29 #     PHY-SEC  physical sector size
  30 #     LOG-SEC  logical sector size
  31 #        ROTA  rotational device
  32 #       SCHED  I/O scheduler name
  33 #     RQ-SIZE  request queue size
  34 #        TYPE  device type
  35 #    DISC-ALN  discard alignment offset
  36 #   DISC-GRAN  discard granularity
  37 #    DISC-MAX  discard max bytes
  38 #   DISC-ZERO  discard zeroes data
  39 #
  40 # If the script is run as just 'lsblk' then print out disk size, vendor,
  41 # and model number.
  42
  43
  44 helpstr="
  45 label:  Show filesystem label.
  46 model:  Show disk model number.
  47 size:   Show the disk capacity.
  48 vendor: Show the disk vendor.
  49 lsblk:  Show the disk size, vendor, and model number."
  50
  51 script="${0##*/}"
  52
  53 if [ "$1" = "-h" ] ; then
  54         echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
  55         exit
  56 fi
  57
  58 if [ "$script" = "lsblk" ] ; then
  59         list="size vendor model"
  60 else
  61         list=$(echo "$script" | tr '[:upper:]' '[:lower:]')
  62 fi
  63
  64 # Sometimes, UPATH ends up /dev/(null).
  65 # That should be corrected, but for now...
  66 # shellcheck disable=SC2154
  67 if [ ! -b "$VDEV_UPATH" ]; then
  68         somepath="${VDEV_PATH}"
  69 else
  70         somepath="${VDEV_UPATH}"
  71 fi
  72
  73 # Older versions of lsblk don't support all these values (like SERIAL).
  74 for i in $list ; do
  75
  76         # Special case: Looking up the size of a file-based vdev can't
  77         # be done with lsblk.
  78         if [ "$i" = "size" ] && [ -f "$somepath" ] ; then
  79                 size=$(du -h --apparent-size "$somepath" | cut -f 1)
  80                 echo "size=$size"
  81                 continue
  82         fi
  83
  84
  85         val=""
  86         if val=$(eval "lsblk -dl -n -o $i $somepath 2>/dev/null") ; then
  87                 # Remove leading/trailing whitespace from value
  88                 val=$(echo "$val" | sed -e 's/^[[:space:]]*//' \
  89                      -e 's/[[:space:]]*$//')
  90         fi
  91         echo "$i=$val"
  92 done