physical_pci_tree.sh

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#! /bin/bash

#

Ensure root privileges

if [ " $EUID "

-ne 0 ] ;

then

echo

" Please run as root (sudo). "

exit 1

fi

echo

"

echo

" 🌐 MOTHERBOARD PCI SLOT TREE & STATUS "

echo

"

#

Temporary files to hold processed blocks

tmp_block= " /tmp/dmi_block.txt "

rm -f " $tmp_block "

#

Read dmidecode output and split by Handle (individual slot blocks)

dmidecode -t slot |

while IFS= read -r line ;

do

if [[ " $line "

=~ ^Handle \ ]] || [[ -z

" $line " ]] ;

then

#

Process the previous block if it exists

if [ -s

" $tmp_block " ] ;

then

#

Extract variables

        slot_name=

$( grep " Designation: "

" $tmp_block "

| cut -d ' : ' -f2- | xargs

)

            slot_type=

$( grep " Type: "

" $tmp_block "

| cut -d ' : ' -f2- | xargs

)

            slot_usage=

$( grep " Current Usage: "

" $tmp_block "

| cut -d ' : ' -f2- | xargs

)

            bus_addr=

$( grep " Bus Address: "

" $tmp_block "

| cut -d ' : ' -f2- | xargs

)

#

Standardize bus address to match lspci format (domain:bus:dev.fn -> bus:dev.fn)

#

 Example: 0000:01:00.0 becomes 01:00.0

            pci_addr=

$( echo " $bus_addr "

| sed ' s/^[1]{4}:// '

)

#

Render Tree Structure

echo

" ├── 🔲 Slot: $slot_name "

echo

" │ ├── Type:
$slot_type "

if [ " $slot_usage "

" In Use " ] && [ -n

" $pci_addr " ] && [ " $pci_addr "

!=

" 00:00.0 " ] ;

then

echo

" │ ├── Status: ✅ POPULATED ( $pci_addr ) "

#

Fetch device details and format as sub-branches

            lspci -s 

" $pci_addr "

|

while

read -r dev_line ;

do

echo

" │ │ └── Device: ${dev_line #*: [0-9a-fA-F][0-9a-fA-F]. * } "

done

#

Append full detail tree from lspci -v for this specific device

            lspci -v -s 

" $pci_addr "

| grep -E " (Kernel driver|Capabilities|LnkSta:) "

|

while

read -r cap_line ;

do

echo

" │ │ └── $( echo " $cap_line "

| xargs ) "

done

else

echo

" │ └── Status: ❌ EMPTY "

fi

echo

" │ "

#

Clear block for next record

" $tmp_block "

fi

fi

#

Append line to current block if inside a slot entry

if [[ -n

" $line " ]] && [[ !

" $line "

=~ ^

#

]]; then echo

" $line "

" $tmp_block "

fi

done

echo

" └── [End of Component Mapping] "

echo

"

#

Cleanup

rm -f

" $tmp_block "

---

1. 0-9a-fA-F ↩︎

source & further reading

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