Markus Zehnder
e85d616da7
* add simulation mode for easier development * improved sensor file watcher, poc cpu & mem usage Trigger file read by rename event * feat: system information sensor tool Gather various sensor values with the sysinfo crate: https://github.com/GuillaumeGomez/sysinfo Values can be written to a sensor source file with the `--out` cmd line option for the `asterctl` tool. * ci: build sysinfo tool and include in build artifact * feat: support integerDigits, decimalDigits sensor value format options * docs: update documentation Closes #6
74 lines
1.9 KiB
Bash
Executable File
74 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# Simple proof-of-concept Linux shell script to periodically write the CPU usage into a sensor text file.
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#
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# A single sensor `cpu_percent` is written to the sensor file containing the overall cpu usage in percent.
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# CPU usage is calculated every second.
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#
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# CPU usage logic from:
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# https://stackoverflow.com/questions/9229333/how-to-get-overall-cpu-usage-e-g-57-on-linux
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#
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set -e
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set -o pipefail
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REFRESH=1
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TEMP_DIR="${TMPDIR:-/tmp}"
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TMP_SENSOR_FILE="${TEMP_DIR}/cpu.txt.tmp"
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SENSOR_FILE="${TEMP_DIR}/sensors/cpu.txt"
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#=============================================================
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usage() {
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cat << EOF
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Simple PoC script to periodically write the CPU usage into a sensor text file.
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Usage:
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$0 [-r REFRESH] [-s SENSOR_FILE] [-t TEMP_DIR]
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-r REFRESH refresh in seconds. Default: $REFRESH
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-s SENSOR_FILE output sensor file. Default: $SENSOR_FILE
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-t TEMP_DIR temporary directory. Default: $TEMP_DIR
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EOF
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exit 1
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}
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#=============================================================
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#------------------------------------------------------------------------------
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# Start of script
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#------------------------------------------------------------------------------
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# check command line arguments
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while getopts "r:s:t:h" opt; do
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case ${opt} in
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"r")
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REFRESH="$OPTARG"
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;;
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"s")
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SENSOR_FILE="$OPTARG"
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;;
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"t")
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TMP_SENSOR_FILE="$OPTARG/cpu.txt.tmp"
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;;
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h )
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usage
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;;
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: )
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echo "Option: -$OPTARG requires an argument" 1>&2
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usage
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;;
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\? )
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echo "Invalid option: -$OPTARG" 1>&2
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usage
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;;
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esac
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done
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mkdir -p "$(dirname "$SENSOR_FILE")"
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while :
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do
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USAGE=$({ head -n1 /proc/stat;sleep "$REFRESH";head -n1 /proc/stat; } | awk '/^cpu /{u=$2-u;s=$4-s;i=$5-i;w=$6-w}END{print "cpu_percent:"int(0.5+100*(u+s+w)/(u+s+i+w))}')
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echo "$USAGE" > "$TMP_SENSOR_FILE"
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mv "$TMP_SENSOR_FILE" "$SENSOR_FILE"
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done
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