[Network Interface Cards] Prints NICs installed on the host #Shell

net_nics.sh

# net_nics.sh

set -o pipefail &&

( #macos
  system_profiler SPEthernetDataType | 
    grep "BSD name" -B 11 | #hardware NICs have BSD names (excludes virtual interaces and bridges)
    grep -v -E "Name|Type|Bus|ID|Sub|Link" | #remove lines we're not concerned with
    sed 's/BSD name://g' | #remove labels
    sed 's/://g' | #remove colons
    tr -d '\n' | #remove new lines
    awk '{ gsub("--","\n"); print $0 }' | #replace -- with new lines
    awk '{ printf $NF"\t"; $NF=""; print $0 }' | #reorder (interface first)
    sed 's/[[:space:]]$//g' | #remove trailing space
    sed 's/\(.*\) /\1       /g' || #add tab between make and model

  # bsd
  pciconf -lv |
    grep -A 2 "class=0x020000" | #only network devices
    tr -s "\n" " " | #replace new lines with spaces
    awk -F' -- ' '{$1=$1}1' OFS='\n' | #replace -- with new lines
    sed 's/ device = //g' | #remove label
    sed 's/@.*= //g' | #remove pci info
    tr -s "'" "\t" || #replace quotes with tab
    
  # linux (lspci)
  ( while read -r interface; do 
      echo "$(
        lspci -Dm -d "::0200" | #lists network pci devices
          awk -vFPAT='([^ ]*)|("[^"]+")' '{ print $1,$3,$4 }' )" | #parse pci domain, make and model
          sed "s/$( echo "${interface}" |
              awk '{ print $1}' #replace pci domain
            )/$( echo "${interface}" | 
              awk '{ print $2}' #with interface name
            )/" | 
            grep "$( echo "${interface}" |
            awk '{ print $2}' #only print lines that have been substituted
          )"
    done < <( ls -l /sys/class/net | 
        grep "$( lspci -Dm -d "::0200" |
            awk '{print $1 }' #search network interfaces for pci address of nics
          )" |
          awk -F/ '{ print $(NF-2),$NF }' #parse pci address and interface name
        ) | 
        sed 's/ "/"/g' | #clean up extraneous space
        tr -s '"' '\t' #add tabs
  )
) 2>/dev/null ||

exit 1 #failure

exit 0 #success