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
85 lines
2.1 KiB
Bash
Executable File
85 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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# Simple proof-of-concept Linux shell script to periodically write the memory usage into a sensor text file.
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#
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# The following sensor values are written to the sensor file.
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# - memory_total in bytes
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# - memory_free in bytes
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# - memory_available in bytes
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# - memory_usage in percent
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#
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# Memory usage is calculated every five seconds.
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set -e
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set -o pipefail
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REFRESH=5
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TEMP_DIR="${TMPDIR:-/tmp}"
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TMP_SENSOR_FILE="${TEMP_DIR}/mem.txt.tmp"
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SENSOR_FILE="${TEMP_DIR}/sensors/mem.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 memory 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/mem.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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MEM_TOTAL=$(grep MemTotal /proc/meminfo | awk '{print $2}')
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MEM_FREE=$(grep MemFree /proc/meminfo | awk '{print $2}')
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MEM_AVAILABLE=$(grep MemAvailable /proc/meminfo | awk '{print $2}')
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printf "memory_total:%d\nmemory_free:%d\nmemory_available:%d\nmemory_usage:%d\n" \
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"$MEM_TOTAL" \
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"$MEM_FREE" \
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"$MEM_AVAILABLE" \
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$(((MEM_TOTAL - MEM_AVAILABLE) * 100 / MEM_TOTAL)) > "$TMP_SENSOR_FILE"
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mv "$TMP_SENSOR_FILE" "$SENSOR_FILE"
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sleep "$REFRESH"
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done
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