Removed: old system-stats script
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LemmyCook
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1 changed files with 0 additions and 270 deletions
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#!/usr/bin/env -S bash
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# A Bash script to monitor system stats and output them in JSON format.
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# --- Configuration ---
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# Default sleep duration in seconds. Can be overridden by the first argument.
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SLEEP_DURATION=3
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# --- Argument Parsing ---
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# Check if a command-line argument is provided for the sleep duration.
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if [[ -n "$1" ]]; then
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# Basic validation to ensure the argument is a number (integer or float).
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if [[ "$1" =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
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SLEEP_DURATION=$1
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else
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# Output to stderr if the format is invalid.
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echo "Warning: Invalid duration format '$1'. Using default of ${SLEEP_DURATION}s." >&2
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fi
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fi
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# --- Global Cache Variables ---
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# These variables will store the discovered CPU temperature sensor path and type
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# to avoid searching for it on every loop iteration.
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TEMP_SENSOR_PATH=""
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TEMP_SENSOR_TYPE=""
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# Network speed monitoring variables
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PREV_RX_BYTES=0
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PREV_TX_BYTES=0
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PREV_TIME=0
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# --- Data Collection Functions ---
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#
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# Gets memory usage in GB, MB, and as a percentage.
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#
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get_memory_info() {
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awk '
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/MemTotal/ {total=$2}
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/MemAvailable/ {available=$2}
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END {
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if (total > 0) {
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usage_kb = total - available
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usage_gb = usage_kb / 1000000
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usage_percent = (usage_kb / total) * 100
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printf "%.1f %.0f\n", usage_gb, usage_percent
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} else {
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# Fallback if /proc/meminfo is unreadable or empty.
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print "0.0 0 0"
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}
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}
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' /proc/meminfo
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}
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#
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# Gets the usage percentage of the root filesystem ("/").
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#
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get_disk_usage() {
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# df gets disk usage. --output=pcent shows only the percentage for the root path.
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# tail -1 gets the data line, and tr removes the '%' sign and whitespace.
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df --output=pcent / | tail -1 | tr -d ' %'
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}
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#
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# Calculates current CPU usage over a short interval.
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#
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get_cpu_usage() {
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# Read all 10 CPU time fields to prevent errors on newer kernels.
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read -r cpu prev_user prev_nice prev_system prev_idle prev_iowait prev_irq prev_softirq prev_steal prev_guest prev_guest_nice < /proc/stat
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# Calculate previous total and idle times.
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local prev_total_idle=$((prev_idle + prev_iowait))
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local prev_total=$((prev_user + prev_nice + prev_system + prev_idle + prev_iowait + prev_irq + prev_softirq + prev_steal + prev_guest + prev_guest_nice))
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# Wait for a short period.
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sleep 0.05
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# Read all 10 CPU time fields again for the second measurement.
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read -r cpu user nice system idle iowait irq softirq steal guest guest_nice < /proc/stat
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# Calculate new total and idle times.
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local total_idle=$((idle + iowait))
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local total=$((user + nice + system + idle + iowait + irq + softirq + steal + guest + guest_nice))
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# Add a check to prevent division by zero if total hasn't changed.
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if (( total <= prev_total )); then
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echo "0.0"
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return
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fi
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# Calculate the difference over the interval.
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local diff_total=$((total - prev_total))
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local diff_idle=$((total_idle - prev_total_idle))
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# Use awk for floating-point calculation and print the percentage.
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awk -v total="$diff_total" -v idle="$diff_idle" '
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BEGIN {
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if (total > 0) {
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# Formula: 100 * (Total - Idle) / Total
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usage = 100 * (total - idle) / total
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printf "%.1f\n", usage
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} else {
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print "0.0"
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}
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}'
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}
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#
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# Finds and returns the CPU temperature in degrees Celsius.
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# Caches the sensor path for efficiency.
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#
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get_cpu_temp() {
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# If the sensor path hasn't been found yet, search for it.
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if [[ -z "$TEMP_SENSOR_PATH" ]]; then
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for dir in /sys/class/hwmon/hwmon*; do
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# Check if the 'name' file exists and read it.
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if [[ -f "$dir/name" ]]; then
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local name
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name=$(<"$dir/name")
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# Check for supported sensor types.
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if [[ "$name" == "coretemp" || "$name" == "k10temp" || "$name" == "zenpower" ]]; then
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TEMP_SENSOR_PATH=$dir
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TEMP_SENSOR_TYPE=$name
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break # Found it, no need to keep searching.
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fi
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fi
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done
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fi
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# If after searching no sensor was found, return 0.
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if [[ -z "$TEMP_SENSOR_PATH" ]]; then
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echo 0
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return
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fi
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# --- Get temp based on sensor type ---
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if [[ "$TEMP_SENSOR_TYPE" == "coretemp" ]]; then
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# For Intel 'coretemp', average all available temperature sensors.
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local total_temp=0
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local sensor_count=0
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# Use a for loop with a glob to iterate over all temp input files.
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# This is more efficient than 'find' for this simple case.
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for temp_file in "$TEMP_SENSOR_PATH"/temp*_input; do
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# The glob returns the pattern itself if no files match,
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# so we must check if the file actually exists.
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if [[ -f "$temp_file" ]]; then
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total_temp=$((total_temp + $(<"$temp_file")))
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sensor_count=$((sensor_count + 1))
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fi
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done
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if (( sensor_count > 0 )); then
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# Use awk for the final division to handle potential floating point numbers
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# and convert from millidegrees to integer degrees Celsius.
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awk -v total="$total_temp" -v count="$sensor_count" 'BEGIN { print int(total / count / 1000) }'
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else
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# If no sensor files were found, return 0.
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echo 0
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fi
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elif [[ "$TEMP_SENSOR_TYPE" == "k10temp" ]]; then
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# For AMD 'k10temp', find the 'Tctl' sensor, which is the control temperature.
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local tctl_input=""
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for label_file in "$TEMP_SENSOR_PATH"/temp*_label; do
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if [[ -f "$label_file" ]] && [[ $(<"$label_file") == "Tctl" ]]; then
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# The input file has the same name but with '_input' instead of '_label'.
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tctl_input="${label_file%_label}_input"
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break
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fi
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done
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if [[ -f "$tctl_input" ]]; then
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# Read the temperature and convert from millidegrees to degrees.
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echo "$(( $(<"$tctl_input") / 1000 ))"
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else
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echo 0 # Fallback
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fi
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elif [[ "$TEMP_SENSOR_TYPE" == "zenpower" ]]; then
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# For zenpower, read the first available temp sensor
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for temp_file in "$TEMP_SENSOR_PATH"/temp*_input; do
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if [[ -f "$temp_file" ]]; then
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local temp_value
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temp_value=$(cat "$temp_file" | tr -d '\n\r') # Remove any newlines
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echo "$((temp_value / 1000))"
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return
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fi
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done
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echo 0
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if [[ -f "$tctl_input" ]]; then
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# Read the temperature and convert from millidegrees to degrees.
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echo "$(($(<"$tctl_input") / 1000))"
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else
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echo 0 # Fallback
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fi
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else
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echo 0 # Should not happen if cache logic is correct.
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fi
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}
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# --- Main Loop ---
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# This loop runs indefinitely, gathering and printing stats.
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while true; do
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# Call the functions to gather all the data.
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# get_memory_info
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read -r mem_gb mem_per <<< "$(get_memory_info)"
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# Command substitution captures the single output from the other functions.
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disk_per=$(get_disk_usage)
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cpu_usage=$(get_cpu_usage)
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cpu_temp=$(get_cpu_temp)
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# Get network speeds
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current_time=$(date +%s.%N)
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total_rx=0
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total_tx=0
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# Read total bytes from /proc/net/dev for all interfaces
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while IFS=: read -r interface stats; do
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# Skip only loopback interface, allow other interfaces
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if [[ "$interface" =~ ^lo[[:space:]]*$ ]]; then
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continue
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fi
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# Extract rx and tx bytes (fields 1 and 9 in the stats part)
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rx_bytes=$(echo "$stats" | awk '{print $1}')
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tx_bytes=$(echo "$stats" | awk '{print $9}')
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# Add to totals if they are valid numbers
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if [[ "$rx_bytes" =~ ^[0-9]+$ ]] && [[ "$tx_bytes" =~ ^[0-9]+$ ]]; then
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total_rx=$((total_rx + rx_bytes))
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total_tx=$((total_tx + tx_bytes))
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fi
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done < <(tail -n +3 /proc/net/dev)
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# Calculate speeds if we have previous data
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rx_speed=0
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tx_speed=0
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if [[ "$PREV_TIME" != "0" ]]; then
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time_diff=$(awk -v current="$current_time" -v prev="$PREV_TIME" 'BEGIN { printf "%.3f", current - prev }')
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rx_diff=$((total_rx - PREV_RX_BYTES))
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tx_diff=$((total_tx - PREV_TX_BYTES))
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# Calculate speeds in bytes per second using awk
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rx_speed=$(awk -v rx="$rx_diff" -v time="$time_diff" 'BEGIN { printf "%.0f", rx / time }')
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tx_speed=$(awk -v tx="$tx_diff" -v time="$time_diff" 'BEGIN { printf "%.0f", tx / time }')
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fi
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# Update previous values for next iteration
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PREV_RX_BYTES=$total_rx
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PREV_TX_BYTES=$total_tx
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PREV_TIME=$current_time
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# Use printf to format the final JSON output string, adding the mem_mb key.
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printf '{"cpu": "%s", "cputemp": "%s", "memgb":"%s", "memper": "%s", "diskper": "%s", "rx_speed": "%s", "tx_speed": "%s"}\n' \
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"$cpu_usage" \
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"$cpu_temp" \
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"$mem_gb" \
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"$mem_per" \
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"$disk_per" \
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"$rx_speed" \
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"$tx_speed"
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# Wait for the specified duration before the next update.
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sleep "$SLEEP_DURATION"
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done
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