---
title: Counting no. of mailman list subscribers
url: https://sammy.hk/counting-no-of-mailman-list-subscribers/
author: Sammy Fung
published: 2009-02-05T03:18:10+08:00
modified: 2021-06-01T00:43:14+08:00
description: "Just wrote a shell script quickly. It can count number of valid subscribers in every Mailman-driven mailing lists. This piece of code is licensed in GPL. 😉 #!/b…"
categories: ["開放源碼"]
tags: [bash]
source: https://sammy.hk
---
Just wrote a shell script quickly. It can count number of valid subscribers in every [Mailman](http://www.gnu.org/software/mailman/)-driven mailing lists. This piece of code is licensed in [GPL](http://www.gnu.org/licenses/gpl.html). 😉

> \#!/bin/sh
> \# Counting valid no. of list subscribers in mailman
> for i in `list\_lists -b`
> do
> total=`list\_members ${i} | wc -l`
> nomail=`list\_members -n ${i} | wc -l`
> valid=`echo ${total} – ${nomail} | bc -l`
> echo ${i}: ${total} – ${nomail} = ${valid} valid email addrs.
> done

**Running Result:**

> team-a: 123 – 0 = 123 valid email addrs.
> team-b: 456 – 78 = 378 valid email addrs.

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