import sys
import signal
import time


asked_to_exit = False


def put_exec_logger(st):
    with open("exec-logger.log", "a") as f:
        f.write(st)
        f.flush()


def to_handle(signum, frame):
    global asked_to_exit

    asked_to_exit = True
    auxst = 'om-exec Signal (' + str(signum) + ') received\n'
    put_exec_logger(auxst)


def prepare_and_do_shutdown():
    c = 0
    while c < 10:
        auxst = 'om-exec Asked to finish - waiting 10 seconds before exiting... Counting ' + str(c) + "\n"
        put_exec_logger(auxst)
        time.sleep(1)
        c += 1
    put_exec_logger("om-exec Exiting grancefully" + "\n")
    exit(0)


def core():
    global asked_to_exit

    signal.signal(signal.SIGINT, to_handle)
    signal.signal(signal.SIGTERM, to_handle)

    break_reason = "EOF"
    for line in sys.stdin:
        if asked_to_exit:
            break_reason = "signal"
            break
        with open("om-exec-out.out", "a") as f:
            f.write(line)
            f.flush()
        put_exec_logger(line)

    put_exec_logger("om-exec Exiting reason " + break_reason + "\n")
    prepare_and_do_shutdown()


if __name__ == '__main__':
    core()

<Input log_file>
    Module      im_file
    File        '/path/to/log/file'
</Input>

<Output myapp>
    Module      om_exec
    Command     /path/to/myapp

    # On Windows the path to the application executable
    # should include the file extension.
    #Command    C:\Program Files\MyApp\myapp.exe

    Arg         --level=info
</Output>

<Input log_file>
    Module      im_file
    File        '/path/to/log/file'
</Input>

<Output stdout>
    Module      om_exec
    Command     /bin/sh
    Arg         -c
    Arg         cat $1
</Output>

<Input log_file>
    Module    im_file
    File      '/path/to/log/file'
</Input>

<Output bash_script>
   Module     om_exec
   Command    /path/to/logreader.sh
   Arg        -o
   Arg        /path/to/output.log
</Output>

#!/usr/bin/env bash

LOG=./output.log
PIDF=./pidf
ME=$(basename $0)
echo $$ > $PIDF

while getopts o: flag

do
    case "${flag}" in
        o)  # Path to the output log file
            LOG=${OPTARG};;
        \?) # Invalid option
            echo "Error: Invalid option"
            exit;;
    esac
done

printlog(){
   echo "$ME[$$]:$@" >> $LOG
}

trap_function(){
   rm $PIDF
   exit
}

trap trap_function 15 2

while read LINE; do
   printlog "INPUT:$LINE"
done

trap_function

<Input log_file>
    Module    im_file
    File      'C:\Logs\input.log'
</Input>

<Output python_script>
   Module     om_exec
   Command    C:\Python39\python.exe
   Arg        -u
   Arg        C:\Scripts\logreader.py
   Arg        --output-file
   Arg        C:\Logs\output.log
</Output>

import argparse
import sys

arg_parser = argparse.ArgumentParser()
arg_parser.add_argument("--output-file",
                        type=str,
                        required=False,
                        dest="output_file",
                        default="./output.log",
                        help="Path to the output log file")
parsed_args = arg_parser.parse_args()

def read_stdin(file_path):
    with open(file_path, "a") as fh_stream:
        for line in sys.stdin:
            fh_stream.write(line)
            fh_stream.flush()

if __name__ == '__main__':
    read_stdin(parsed_args.output_file)

<Input log_file>
    Module    im_file
    File      'C:\Logs\input.log'
</Input>

<Output powershell_script>
   Module     om_exec
   Command    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
   Arg        C:\Scripts\logreader.ps1
   Arg        -OutputFile
   Arg        C:\Logs\output.log
</Output>

param (
    [string]$OutputFile = "$PSScriptRoot\output.log"
)

while ($line = Read-Host)
{
    $line | Add-Content -Path $OutputFile
}