#!/bin/bash

# SARPi Project - Slackware ARM on a Raspberry Pi [sarpi.penthux.net]
#
# Copyright (c) 2021 Sarpi Project - https://sarpi.penthux.net
#
# cpu_status.sh
#
# Raspberry Pi CPU clock frequency and thermal status.
# This script outputs the current status of the CPU clock speed (MHz)
# and core temperature (Celsius) for monitoring or testing purposes
# while under load or idle. Easily modified to suit other ARM devices.
#
# Usage -
# Default command:   ./cpu_status.sh           # run once, no refresh
# Default refresh:   watch ./cpu_status.sh     # 2 seconds refresh
# Custom refresh:    watch -n<number of seconds or 0> ./cpu_status.sh
# With highlights:   watch -d -n0 ./cpu_status.sh
# Perm highlights:   watch -d=cumulative -n0 ./cpu_status.sh
#
# Exaga : 15 Jan 2018 - progenitor
#         29 Jun 2019 - update rpi model & hw revision
#         03 Jul 2019 - update quad-core cpu and system uptime
#         18 Jul 2019 - update cpu-id and cpufreq-info
#         27 Jan 2020 - code revision and update
#         07 Sep 2020 - code clean-up

# Halt script process on error
set -e
IFS="$(printf '\n\t')"

# Output SARPi marque
echo -e "SARPi Project - sarpi.penthux.net\nSlackware ARM SoC [MHz & Thermal] Stats\n"

# Get RPi model, hardware revision, and CPU
RPiModel=$(tr -d '\0' </proc/device-tree/model)
RPiHWRev=$(cat <"/proc/cpuinfo" | grep Revision | cut -d' ' -f2)
RPiCPUiD=$(cat <"/proc/cpuinfo" | grep Serial | cut -d' ' -f2)

# Get cpu_status function
cpu_status () {
# Get current CPU frequency (All 4 cores)
CPU0freq=$(cat <"/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq")
cpuFreq0=$((CPU0freq/1000))
if [ -f /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_cur_freq ]; then
CPU1freq=$(cat <"/sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_cur_freq")
cpuFreq1=$((CPU1freq/1000))
CPU2freq=$(cat <"/sys/devices/system/cpu/cpu2/cpufreq/cpuinfo_cur_freq")
cpuFreq2=$((CPU2freq/1000))
CPU3freq=$(cat <"/sys/devices/system/cpu/cpu3/cpufreq/cpuinfo_cur_freq")
cpuFreq3=$((CPU3freq/1000))
fi

# Ouput RPi model/version and system uptime to terminal
echo "Device : ${RPiModel}"
echo "HW Rev : ${RPiHWRev}"
echo -e "CPU ID : ${RPiCPUiD}\n" 

# Output system uptime
echo -e "Uptime :$(uptime)\n" 


# Output CPU clock status to terminal
echo CPU Freq Status [clock speed]
echo "CPU 0 Freq : ${cpuFreq0}"MHz
if [ -f /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_cur_freq ]; then
    echo "CPU 1 Freq : ${cpuFreq1}"MHz
    echo "CPU 2 Freq : ${cpuFreq2}"MHz
    echo "CPU 3 Freq : ${cpuFreq3}"MHz
fi


# Display CPU freq usage stats
echo -e "\n$(cpufreq-info | grep -m 1 -h 'cpufreq stats:' | cut -d'(' -f1 | cut -d' ' -f3-12)\n"


# Get CPU thermal status and output to terminal
echo CPU Thermal Status
cpuTemp0=$(cat <"/sys/class/thermal/thermal_zone0/temp")
cpuTemp1=$((cpuTemp0/1000))
cpuTemp2=$((cpuTemp0/100))
cpuTempM=$((cpuTemp2 % cpuTemp1))
echo "CPU temp : ${cpuTemp1}.${cpuTempM}"\'C

# Output exit method to terminal
echo -e "\n[Press CTRL+C to exit.]\n"

}

# Roll cpu_status function
cpu_status

exit 0

#EOF<*>