雑、grep でいける。

m.bat

:: $ m \d+ -s ho12ge34
:: 12
:: 34
::
:: $ echo ho12ge34 | grep -o [0-9]\\+ -
:: 12
:: 34
::
@echo off
python -c "import re, sys;print('usage: m pattern file\n       m pattern -s string' if '-h' in sys.argv or len(sys.argv) <= 2 else '\n'.join(re.findall(sys.argv[1],sys.argv[sys.argv.index('-s') + 1] if '-s' in sys.argv[2:] else open(sys.argv[2], 'r', encoding='utf-8').read())))" %*

m.py

# coding: utf-8
import re, sys;

print(
  'usage: m pattern file\n       m pattern -s string'
  if '-h' in sys.argv or len(sys.argv) <= 2
  else '\n'.join(re.findall(
    sys.argv[1],
    sys.argv[sys.argv.index('-s') + 1]
    if '-s' in sys.argv[2:]
    else open(sys.argv[2], 'r', encoding='utf-8').read()
)))