连接到无线网络后调用脚本

Question

一旦我连接到特定的无线网络，有没有办法让我调用 shell 脚本？我想这样做的原因是我必须先登录网络，然后才能开始使用它，如果可能的话，我想将其自动化。

我读到这个问题：有没有办法在每次连接到特定无线网络时运行脚本？

但我真的不确定如何使用 upstart 来做到这一点。

Answer 1

为我之前的回答道歉，这是我多年前的做法。似乎事情发生了变化。

事实证明/etc/NetworkManager/dispatcher.d/，当连接发生变化时（up、down、preup、predown），网络管理器会运行目录中的所有脚本（root 拥有的脚本、可执行的脚本、其他用户无法读取的脚本和 setuid 脚本） .

环境变量由网络管理器设置并传递给此脚本。您会对 CONNECTION_UUID 环境变量（包含唯一字符串）感兴趣。

因此，要解决您的问题（在连接到特定无线网络时执行脚本）：

1) 找出您感兴趣的无线连接的 uuid（通过查看/etc/NetworkManager/system-connections/目录中相应的连接文件）。

2) 如果环境变量 CONNECTION_UUID 与上述 (1) 中的无线网络的 uuid 匹配，则编写一个 bash（或 perl、或 python 或其他）脚本，该脚本可以执行您想要的操作。

3) 将此脚本放入/etc/NetworkManager/dispatcher.d/并适当设置所有者和权限。

进一步阅读： man networkmanager （以及对上述目录中的脚本进行一些探索）。

一个示例脚本：

#!/bin/bash
#####################################
# MounterBeast Script
# /etc/NetworkManager/dispatcher.d/02remotemount
# Copyright 2011 Nathan E. Williams
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Usage:
# This script must be customized for your configuration.
# By default, the script will attempt to mount a CIFS share
# when a specified MAC address is found at the network gateway,
# or over sshfs if the MAC address of the gateway is not the specified MAC.
# e.g. I mount over CIFS to the servers internal IP when at home, and
# over sshfs when away from home.
#
# id gateway mac without physically checking the sticker:
# $ arp -n -a $(ip route show 0.0.0.0/0 | awk '{print $3}') | awk '{print $4}'
#
# Testing:
# up) sudo /etc/NetworkManager/dispatcher.d/02remotemount wlan0 up
# down) sudo /etc/NetworkManager/dispatcher.d/02remotemount wlan0 down
#####################################
#
# Configuration:
#
targetmac='xx:xx:xx:xx:xx:xx'
mount_user='$USER'
mount_pass='pass'
internal_server_name='192.168.1.102'
external_server_name='my.dyndns.com'
share_name="music"
mount_point='/mnt/remote'
ssh_port='22'
#
# Should not need to edit below
#
gateway=$(ip route show 0.0.0.0/0 | awk '{print $3}')
mactest=$(arp -n -a $gateway | awk '{print $4}')

if [[ "$mactest" == "$targetmac" ]]
then
  case "$2" in
          up)
          sleep 5
          mount -t cifs -o username=$mount_user,password=$mount_pass //$internal_server_name/$share_name $mount_point
          ;;
          down)
          umount -l $mount_point
          ;;
  esac
else
  case "$2" in
      up)
          sleep 5
          sshfs -p $ssh_port $external_server_name:$share_name $mount_point
      ;;
      down)
          umount -l $mount_point
      ;;
  esac
fi

exit $?