以特定用户的身份从PHP运行命令行应用程序 [英] Running command-line application from PHP as specific user

问题描述

我在本地主机上运行Apache.通过以www-user身份运行的PHP脚本，我想控制我的机器上Rhythmbox的播放.到目前为止，我的PHP脚本中有一个简单的命令:

I am running Apache on my localhost. From a PHP script run as www-user I would like to control Rhythmbox playback on my machine. So far I have a simple command in my PHP script:

exec('rhythmbox-client --pause');

当我像我一样从命令行运行它时，这很好用，但是如果它以www-user身份运行，我想rhythmbox-client不知道/无法访问我的Rhythmbox实例.

This works great when I run it from the command-line as me, but if it runs as www-user I guess rhythmbox-client doesn't know/can't access my instance of Rhythmbox.

有没有一种简单的方法可以让该PHP脚本以我的用户而不是www-user的身份运行，或者告诉rhythmbox-client要控制哪个实例?

Is there an easy way for that PHP script to run as my user rather than www-user, or to tell rhythmbox-client which instance to control?

整个应用程序是，当我的电话摘机时，它将调用我的PHP脚本，该脚本暂停音乐，并在电话摘机时恢复播放.我爱VoIP电话！

The overall application is that when my phone goes off-hook it calls my PHP script which pauses music, and resumes playback when the phone is on-hook. I love VoIP phones!

解决方案: 多亏了Carpetsmoker和Tarek，我使用sudo作为答案，但是存在一些问题.为了克服它们，我做了以下工作:

Solution: Thanks to Carpetsmoker and Tarek I used sudo as the answer but there was a couple of problems. To overcome them I did the following:

创建了一个bash脚本来调用rhythmbox-client.该bash脚本是使用PHP中的sudo执行的，如下面的答案所述.不幸的是，rhythmbox-client不知道要控制什么环境，因此bash脚本如下所示:

Created a bash script to call rhythmbox-client. This bash script was executed using sudo in PHP as described in the answer below. Unfortunately rhythmbox-client didn't know what environment to control, so the bash script looks like this:

#! /bin/bash
DBUS_ADDRESS=`grep -z DBUS_SESSION_BUS_ADDRESS /proc/*/environ 2> /dev/null| sed 's/DBUS/\nDBUS/g' | tail -n 1`
if [ "x$DBUS_ADDRESS" != "x" ]; then
        export $DBUS_ADDRESS
        /usr/bin/rhythmbox-client --pause
fi

现在，bash脚本可以由PHP和wwwuser执行，并且我的手机可以暂停/播放音乐！

Now that bash script can be executed by PHP and wwwuser, and my phone can pause/play my music!

推荐答案

一种解决方案是使用sudo(8):

exec('sudo -u myuser ls /');

很明显，您将需要设置sudo(8)，以允许运行Web服务器的用户调用它.使用visudo(8)编辑sudoers文件，可以使用类似以下内容的文件:

You will, obviously, need to setup sudo(8) to allow the user running your webserver to invoke it. Editing the sudoers file with visudo(8), you can use something like:

wwwuser ALL=/usr/bin/rhythmbox-client

为了防止Apache能够运行其他命令，并且仅 rythymbox命令.

To prevent Apache from being able to run other commands and only the rythymbox command.

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