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su -
cat > /usr/share/zfs/zpool.d/upath <<EOT
#!/bin/sh
if [ "\$1" = "-h" ] ; then
        echo
        echo "Show the underlying path for a device."
         exit fi   # shellcheck disable   exit
fi
 # shellcheck disable=SC2154
echo upath="\$VDEV_UPATH"
EOT
sed -i '/./!d' /usr/share/zfs/zpool.d/upath

#!/bin/cat > /usr/share/zfs/zpool.d/iostat <<EOT
#!/bin/sh
#
# Display most relevant iostat bandwidth/latency numbers.   The output is
# dependent on the name of the script/symlink used to call it.
#
helpstr="
iostat:                 Show iostat values since boot (summary page).
iostat-1s:           Do a single 1-second iostat sample and show values.
iostat-10s:         Do a single 10-second iostat sample and show values."
script="\${0##*/}"
if [ "\$1" = "-h" ] ; then
        echoecho "\$helpstr" | grep "\$script:" | tr -s '\\t' | cut -f 2-
      exit  exit
fi
if [ "\$script" = "iostat-1s" ] ; then
      #  # Do a single one-second sample
       interval interval=1
        ## Don't show summary stats
        briefbrief="yes"
elif [ "\$script" = "iostat-10s" ] ; then
        ## Do a single ten-second sample
        intervalinterval=10
        ## Don't show summary stats
     brief   brief="yes"
fi
if [ -f "\$VDEV_UPATH" ] ; then
    # We're a   # We're a file-based vdev, iostat doesn't work on us.   Do nothing.
        exitexit
fi
out=\$(iostat -x "\${VDEV_UPATH##*/}" \
    $
    \${interval:+"\$interval"} \
    $
    \${interval:+"1"} | tail -n 2)
          
# Sample output (we want the last two lines):
#  #  
# Linux 2.6.32-642.13.1.el6.x86_64 (centos68)     03/09/2017     2017      _x86_64_                (6 CPU)
#
# avg-cpu:   %user  %user   %nice %system %iowait  %steal %iowait  %steal   %idle
#          
#           0.00   00    0.00   00    0.00   00    0.00   00    0.00 00  100.00
#
# Device:                  rrqm/s  s   wrqm/s    s     r/s    s     w/s   s    rkB/s   s    wkB/s avgrq-sz avgqu-sz  sz   await r_await w_await await  svctm svctm  %util
# sdb sdb               0.00     0.00    0.00    0.00     0.00     0.00     0.00     0.00    0.00    0.00    0.00   0.00             0.00     0.00    0.00    0.00     0.00     0.00     0.00     0.00    0.00    0.00    0.00   0.00   0.00
#
# Get the column names
cols=\$(echo "\$out" | head -n 1)
# Get the values and tab separate them to make them cut-able.
vals=\$(echo "\$out" | tail -n 1 | tr -s '[:space:]' '\\t')
i=0
for col in \$cols ; do
        ii=\$((i+1))
        ## Skip the first column since it's just the device name
        ifif [ \$i -eq 1 ]; then
        continue
    fi
    # -eq 1 ]; then
        continue
    fi
    # Get i'th value
        valval=\$(echo "\$vals" | cut -f "\$i")
        echoecho "\$col=\$val"
done
EOT
sed -i '/./!d' /usr/share/zfs/zpool.d/iostat