FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/cmd/zpool/zpool.d/model

     #!/bin/sh
     #
     # Print some common lsblk values
     #
     # Any (lowercased) name symlinked to the lsblk script will be passed to lsblk
     # as one of its --output names.  Here's a partial list of --output names
     # from the lsblk binary:
     #
     # Available columns (for --output):
    #        NAME  device name
    #       KNAME  internal kernel device name
    #     MAJ:MIN  major:minor device number
    #      FSTYPE  filesystem type
    #  MOUNTPOINT  where the device is mounted
    #       LABEL  filesystem LABEL
    #        UUID  filesystem UUID
    #          RA  read-ahead of the device
    #          RO  read-only device
    #          RM  removable device
    #       MODEL  device identifier
    #        SIZE  size of the device
    #       STATE  state of the device
    #       OWNER  user name
    #       GROUP  group name
    #        MODE  device node permissions
    #   ALIGNMENT  alignment offset
    #      MIN-IO  minimum I/O size
    #      OPT-IO  optimal I/O size
    #     PHY-SEC  physical sector size
    #     LOG-SEC  logical sector size
    #        ROTA  rotational device
    #       SCHED  I/O scheduler name
    #     RQ-SIZE  request queue size
    #        TYPE  device type
    #    DISC-ALN  discard alignment offset
    #   DISC-GRAN  discard granularity
    #    DISC-MAX  discard max bytes
    #   DISC-ZERO  discard zeroes data
    #
    # If the script is run as just 'lsblk' then print out disk size, vendor,
    # and model number.
    
    
    helpstr="
    label:  Show filesystem label.
    model:  Show disk model number.
    size:   Show the disk capacity.
    vendor: Show the disk vendor.
    lsblk:  Show the disk size, vendor, and model number."
    
    script="${0##*/}"
    
    if [ "$1" = "-h" ] ; then
            echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
            exit
    fi
    
    if [ "$script" = "lsblk" ] ; then
            list="size vendor model"
    else
            list=$(echo "$script" | tr '[:upper:]' '[:lower:]')
    fi
    
    # Sometimes, UPATH ends up /dev/(null).
    # That should be corrected, but for now...
    # shellcheck disable=SC2154
    if [ ! -b "$VDEV_UPATH" ]; then
            somepath="${VDEV_PATH}"
    else
            somepath="${VDEV_UPATH}"
    fi
    
    # Older versions of lsblk don't support all these values (like SERIAL).
    for i in $list ; do
    
            # Special case: Looking up the size of a file-based vdev can't
            # be done with lsblk.
            if [ "$i" = "size" ] && [ -f "$somepath" ] ; then
                    size=$(du -h --apparent-size "$somepath" | cut -f 1)
                    echo "size=$size"
                    continue
            fi
    
    
            val=""
            if val=$(eval "lsblk -dl -n -o $i $somepath 2>/dev/null") ; then
                    # Remove leading/trailing whitespace from value
                    val=$(echo "$val" | sed -e 's/^[[:space:]]*//' \
                         -e 's/[[:space:]]*$//')
            fi
            echo "$i=$val"
    done

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