Get readable memory information without needing sudo for dmidecode on Linux - taken from plasma/kinfocenter MR !204

memory_info.sh

#!/bin/sh

# SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
# SPDX-FileCopyrightText: 2024 Thomas Duckworth <tduck973564@gmail.com>

o="$(udevadm info -q property -p /sys/devices/virtual/dmi/id --no-pager)"

# Calculate minimum width required for all output
width="$(echo "$o"| grep -e "MEMORY_ARRAY" -e "MEMORY_DEVICE" | awk -F '=' '
{
  gsub(/MEMORY_DEVICE_[0-9]*_|MEMORY_ARRAY_/, "", $1)
  if (length($1) > width) {
    width = length($1)
  }
}
END {
  print width
}')"

section() {
  printf "%s:\n" "$2"

  echo "$1" | awk -v width="$width" -F '=' '
  function pretty_bytes(x) {
    sizes=" B   KiB MiB GiB TiB EiB PiB YiB ZiB"
    while (x >= 1024 && length(sizes) > 1) {
      x /= 1024
      sizes = substr(sizes, 5)
    }
    sizes = substr(sizes, 1, 4)
    xf = (sizes == " B  ") ? "%-1d" : "%-1.2f"
    return sprintf(xf"%s", x, sizes)
  }
  {
    # Strip whitespace from either side
    key = $1
    gsub(/^[ \t]+|[ \t]+$/, "", key)
    value = $2
    gsub(/^[ \t]+|[ \t]+$/, "", value)

    # Remove leading MEMORY_DEVICE_*_ or MEMORY_ARRAY_ from keys
    gsub(/MEMORY_DEVICE_[0-9]*_|MEMORY_ARRAY_/, "", key)

    # Replace underscores with spaces
    gsub(/_/, " ", key)

    # Capitalize first letter, lowercase rest, trim whitespace beforehand
    key = tolower(key)
    gsub(/^[ \t]+/, "", key)
    key = toupper(substr(key, 1, 1)) substr(key, 2);

    # Make keys and values more readable
    gsub(/ mts/, " in MT/s", key)
    gsub(/ id/, " ID", key)
    gsub(/Num /, "Number of ", key)
    if (key == "Present" && (value == "0" || value == "1")) {
      value = (value == "1") ? "Yes" : "No"
    }
    if (value ~ /^[0-9]+$/ && key == "Size" || key == "Volatile size" || key == "Data width" || key == "Max capacity" || key == "Total width") {
      value = pretty_bytes(value)
    }

    # Only output things that actually provide information - except for "No", which just means the slot is empty
    if (value != "Unknown" && value != "<OUT OF SPEC>" && value != "Not Specified" && value != "None" && value ~ /[^[:space:]]/) {
      dict[key] = value
    }
  }
  END {
    margin = "    "
    for (key in dict) {
      printf margin key"="dict[key]"\n"
    }

    # Crude way of preserving same alignment of all sections
    normalizer = margin
    for (i = 1; i <= width; i++) {
      normalizer = normalizer " "
    }
    normalizer = normalizer "="
    printf normalizer
  }' | column -t -s =
}

section "$(echo "$o" | grep "MEMORY_ARRAY")" "Memory array information"

num_devices="$(echo "$o" | grep "MEMORY_ARRAY_NUM_DEVICES" | cut -d '=' -f2)"

for i in $(seq 1 "$num_devices"); do
  section "$(echo "$o" | grep "MEMORY_DEVICE_$((i - 1))")" "Memory slot $i"
done