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I'm trying to write a small script to mount a VirtualBox shared folder each time I execute the script. I want to do it with Python, because I'm trying to learn it for scripting.
The problem is that I need privileges to launch mount command. I could run the script as sudo, but I prefer it to make sudo by its own.
I already know that it is not safe to write your password into a .py file, but we are talking about a virtual machine that is not critical at all: I just want to click the .py script and get it working.
This is my attempt:
#!/usr/bin/env python import subprocess sudoPassword = 'mypass' command = 'mount -t vboxsf myfolder /home/myuser/myfolder' subprocess.Popen('sudo -S' , shell=True,stdout=subprocess.PIPE) subprocess.Popen(sudoPassword , shell=True,stdout=subprocess.PIPE) subprocess.Popen(command , shell=True,stdout=subprocess.PIPE) My python version is 2.6
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In Linux, the sudo command allows us to execute a command or script as the superuser. However, by default, the sudo command works in an interactive mode.
Sudo, the one command to rule them all. It stands for “super user do!” and is pronounced like “sue dough”. As a Linux system administrator or power user, it's one of the most important commands in your arsenal. Have you ever tried to run a command in terminal only to be given “Access Denied?”.
Running a Specific Script as Another User. Before we can execute scripts as other users with sudo, we'll need to add the current user to the sudoers file. To do that, we'll use the visudo command to safely edit the /etc/sudoers file. The command above echo the rule and pipe the rule into the visudo command.
Many answers focus on how to make your solution work, while very few suggest that your solution is a very bad approach. If you really want to "practice to learn", why not practice using good solutions? Hardcoding your password is learning the wrong approach!
If what you really want is a password-less mount for that volume, maybe sudo isn't needed at all! So may I suggest other approaches?
Use /etc/fstab as mensi suggested. Use options user and noauto to let regular users mount that volume.
Use Polkit for passwordless actions: Configure a .policy file for your script with <allow_any>yes</allow_any> and drop at /usr/share/polkit-1/actions
Edit /etc/sudoers to allow your user to use sudo without typing your password. As @Anders suggested, you can restrict such usage to specific commands, thus avoiding unlimited passwordless root priviledges in your account. See this answer for more details on /etc/sudoers.
All the above allow passwordless root privilege, none require you to hardcode your password. Choose any approach and I can explain it in more detail.
As for why it is a very bad idea to hardcode passwords, here are a few good links for further reading:
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