Lists Linux block devices and for each one the controller it is connected to.

lsblkctrl.sh

#!/bin/bash

# Lists Linux block devices and for each one the controller
# it is connected to.

set -o pipefail

for i in /sys/block/sd*; do
    # Find the path that contains the PCI ID of the controller.
    link=$(readlink $i)
    # Assume that the PCI ID of the controller is the path part
    # right before the /host... part.
    parts=($(echo $link | sed -e 's,/host.*,,' | tr "/" "\n"))
    # The PCI ID of the controller should now be the last item
    # in the array.
    pciid=${parts[-1]}
    # Get the device description from the PCI ID.
    ctrl=$(lspci -s $pciid 2>/dev/null | sed -e 's/.*: //')
    # Print the result if lspci suceeeded (it doesn't for a block
    # device connected to USB).
    test $? -eq 0 && echo $i: $ctrl
done