--- /dev/null
+#! /bin/bash
+
+MSG_FS='|'
+
+set -e
+
+executable_name_of_cmd() {
+ basename "$(echo $1 | awk '{print $1; exit}')"
+}
+
+run_producer() {
+ pipe="$1"
+ bin="$2"
+ cmd="$3"
+ executable_name="$4"
+ perf_log="$5"
+
+ if [ ! "$perf_log" = '' ]
+ then
+ # %S system time in seconds
+ # %U user time in seconds
+ # %e elapsed time in seconds
+ # %c context switches involuntary
+ # %w context switches voluntary
+ # %x exit code
+ time_fmt='%S %U %e %c %w %x'
+ time="/usr/bin/time -ao ${perf_log} -f "
+ time_sep=' '
+ else
+ time_fmt=''
+ time=''
+ time_sep=''
+ fi
+
+ ${time}"${time_fmt}"${time_sep}$bin/$cmd \
+ 2> >(
+ while read line
+ do
+ echo "${NODE}${MSG_FS}${executable_name}${MSG_FS}error${MSG_FS}$line" > "$pipe"
+ done \
+ ) \
+ | while read line
+ do
+ echo "${NODE}${MSG_FS}${executable_name}${MSG_FS}data${MSG_FS}$line" > "$pipe"
+ done
+ cmd_exit_code=${PIPESTATUS[0]}
+ if [ "$cmd_exit_code" -ne 0 ]
+ then
+ echo
+ "${NODE}${MSG_FS}${executable_name}${MSG_FS}error${MSG_FS}NON_ZERO_EXIT_CODE${MSG_FS}$cmd_exit_code" \
+ > "$pipe"
+ fi
+}
+
+fork_watcher() {
+ pipe="$1"
+ bin="$2"
+ cmd="$3"
+ executable_name=$(executable_name_of_cmd "$cmd")
+ run_producer "$pipe" "$bin" "$cmd" "$executable_name" &
+}
+
+fork_poller() {
+ interval="$1"
+ perf_log_dir="$2"
+ shift 2
+ pipe="$1"
+ bin="$2"
+ cmd="$3"
+
+ executable_name=$(basename "$(echo $cmd | awk '{print $1; exit}')")
+
+ if [ ! "$perf_log_dir" = '' ]
+ then
+ cmd="$3"
+ perf_log_file=${executable_name}.log
+ mkdir -p "$perf_log_dir"
+ perf_log_path="$perf_log_dir/$perf_log_file"
+ fi
+
+ while :
+ do
+ run_producer "$pipe" "$bin" "$cmd" "$executable_name" "$perf_log_path"
+ sleep "$interval"
+ done &
+}
+
+main() {
+ declare -A opts=(
+ ["--node"]=$(hostname)
+ ["--dir_bin"]="$HOME/bin"
+ ["--dir_perf_logs"]=''
+ ["--file_pipe"]=$(mktemp)
+ ["--weather_station_id"]='KJFK'
+ ["--screen_brightness_device_name"]='acpi_video0'
+ ["--wifi_interface"]=''
+ ["--disk_space_device"]='/'
+ ["--disk_io_device"]='sda'
+ ["--thermal_zone"]=0
+ ["--fan_path"]='/proc/acpi/ibm/fan'
+ ["--pulseaudio_sink"]='0'
+ ["--interval_datetime"]=1
+ ["--interval_procs"]=1
+ ["--interval_brightness"]=1
+ ["--interval_weather"]=$(( 30 * 60)) # 30 minutes
+ ["--interval_mpd"]=1
+ ["--interval_volume"]=1
+ ["--interval_bluetooth"]=1
+ ["--interval_net_wifi"]=1
+ ["--interval_net_io"]=1
+ ["--interval_disk_space"]=1
+ ["--interval_disk_io"]=1
+ ["--interval_loadavg"]=1
+ ["--interval_temp"]=1
+ ["--interval_fan"]=1
+ ["--interval_mem"]=1
+ )
+ while :
+ do
+ key="$1"
+ val="$2"
+ case "$key" in
+ '')
+ break
+ ;;
+ * )
+ if [ -v opts["$key"] ]
+ then
+ if [ "$val" != "" ]
+ then
+ opts["$key"]="$val"
+ shift
+ shift
+ else
+ echo "Option $key requires an argument" >&2
+ exit 1
+ fi
+ else
+ echo "Unknown option: $key" >&2
+ exit 1
+ fi
+ esac
+ done
+
+ if [ "${opts['--wifi_interface']}" = '' ]
+ then
+ echo 'Please provide the required parameter: --wifi_interface' >&2
+ exit 1
+ fi
+
+ (
+ echo '=============================================='
+ echo "Khatus starting with the following parameters:"
+ echo '=============================================='
+ for param in ${!opts[@]}
+ do
+ echo "$param := ${opts[$param]}"
+ done \
+ | column -ts: \
+ | sort
+ echo '----------------------------------------------'
+ ) >&2
+
+ NODE="${opts['--node']}"
+
+ screen_brightness_device_path='/sys/class/backlight'
+ screen_brightness_device_path+="/${opts['--screen_brightness_device_name']}"
+
+ # Just shorthand
+ pipe="${opts['--file_pipe']}"
+ bin="${opts['--dir_bin']}"
+ perf="${opts['--dir_perf_logs']}"
+
+ rm -f "$pipe"
+ mkfifo "$pipe"
+
+ cmd_sens_screen_brightness='khatus_sensor_screen_brightness'
+ cmd_sens_screen_brightness+=" $screen_brightness_device_path"
+
+ cmd_sens_weather="khatus_sensor_weather $bin ${opts['--weather_station_id']}"
+ cmd_sens_disk_space="khatus_sensor_disk_space $bin ${opts['--disk_space_device']}"
+ cmd_sens_disk_io="khatus_sensor_disk_io $bin ${opts['--disk_io_device']}"
+ cmd_sens_temperature="khatus_sensor_temperature ${opts['--thermal_zone']}"
+ cmd_sens_fan="khatus_sensor_fan $bin ${opts['--fan_path']}"
+ cmd_sens_bluetooth="khatus_sensor_bluetooth_power $bin"
+ cmd_sens_mpd="khatus_sensor_mpd $bin"
+ cmd_sens_net_addr_io="khatus_sensor_net_addr_io $bin"
+ cmd_sens_volume="khatus_sensor_volume $bin"
+ cmd_sens_wifi="khatus_sensor_net_wifi_status $bin ${opts['--wifi_interface']}"
+ cmd_sens_loadavg="khatus_sensor_loadavg $bin"
+ cmd_sens_memory="khatus_sensor_memory $bin"
+
+ fork_watcher "$pipe" "$bin" "khatus_sensor_energy $bin"
+ fork_watcher "$pipe" "$bin" "khatus_sensor_devices $bin"
+ fork_poller "${opts['--interval_datetime']}" "$perf" "$pipe" "$bin" khatus_sensor_datetime
+ fork_poller "${opts['--interval_procs']}" "$perf" "$pipe" "$bin" "khatus_sensor_procs $bin"
+ fork_poller "${opts['--interval_brightness']}" "$perf" "$pipe" "$bin" "$cmd_sens_screen_brightness"
+ fork_poller "${opts['--interval_weather']}" "$perf" "$pipe" "$bin" "$cmd_sens_weather"
+ fork_poller "${opts['--interval_mpd']}" "$perf" "$pipe" "$bin" "$cmd_sens_mpd"
+ fork_poller "${opts['--interval_volume']}" "$perf" "$pipe" "$bin" "$cmd_sens_volume"
+ fork_poller "${opts['--interval_bluetooth']}" "$perf" "$pipe" "$bin" "$cmd_sens_bluetooth"
+ fork_poller "${opts['--interval_net_wifi']}" "$perf" "$pipe" "$bin" "$cmd_sens_wifi"
+ fork_poller "${opts['--interval_net_io']}" "$perf" "$pipe" "$bin" "$cmd_sens_net_addr_io"
+ fork_poller "${opts['--interval_disk_space']}" "$perf" "$pipe" "$bin" "$cmd_sens_disk_space"
+ fork_poller "${opts['--interval_disk_io']}" "$perf" "$pipe" "$bin" "$cmd_sens_disk_io"
+ fork_poller "${opts['--interval_loadavg']}" "$perf" "$pipe" "$bin" "$cmd_sens_loadavg"
+ fork_poller "${opts['--interval_temp']}" "$perf" "$pipe" "$bin" "$cmd_sens_temperature"
+ fork_poller "${opts['--interval_fan']}" "$perf" "$pipe" "$bin" "$cmd_sens_fan"
+ fork_poller "${opts['--interval_mem']}" "$perf" "$pipe" "$bin" "$cmd_sens_memory"
+
+ stdbuf -o L tail -f "$pipe"
+}
+
+main $@
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