Vagrant Up or Provision if already Up

I need to create a simple script (Windows .bat) that will provision or up a box.

Not much experience with .bat files, so this is what I have so far:

Edited thanks to Greg Hewgill

cd C:\vagrant-box\

call vagrant-up.bat

if errorlevel 1 call vagrant-provision.bat

The .bat files called in the script just contain one line: vagrant up and vagrant reload, respectively.

When the vagrant box is down, then vagrant up runs successfully. When up, I encounter an error with vagrant up (which I expect) but the whole batch file dies there. ErrorLevel doesn't appear to do anything.

Here is the error if it makes a difference

Bringing machine 'default' up with 'virtualbox' provider...
There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["list", "hostonlyifs"]

Stderr: VBoxManage.exe: error: Failed to create the VirtualBox object!
VBoxManage.exe: error: Code CO_E_SERVER_EXEC_FAILURE (0x80080005) - Server execution failed (extend)
VBoxManage.exe: error: Most likely, the VirtualBox COM server is not running or failed to start.

I want to emphasize I don't care about the error per se. It works when the box is not running, so it's fine. I just want to capture or ignore it, and move to the next command.

vagrant up exits with code 0 even if the machine is already running.

But you don't have to bother with exit codes, you can just run:

vagrant provision && vagrant up

And you should cover both cases. If the guest is not running, vagrant provision will gracefully fail and vagrant up will succeed, and vice versa.