On Feb 24, 2020, at 9:40 AM, Samuel Herts <sdherts@gmail.com> = wrote:

So if I wanted a c++ script to run on the bmc = whenever I desired, how exactly would I go about implementing it as a = module to run? Kind of like the Phosphor state manager module that the = Hello World guide starts on, specifically, what steps would I need to = take or what resources should I look into for creating my own module = that will run when a specific command is sent, like the systemctl start = phosphor.

This would probably make a good tutorial = under

https://github.com/openbmc/docs/tree/master/development

but here=E2=80=99s the really fast answer from my = perspective.

First you create a git = repository somewhere (i.e. github).

Next you pick a logical location in for your = recipe to

be located. For example if it was going to be a = package used

by all of OpenBMC, it would go out somewhere = in

https://github.com/openbmc/openbmc/tree/master/meta-phosphor/re= cipes-phosphor

A good example is = bmcweb:

https://github.com/openbmc/openbmc/blob/master/meta-phosphor/re= cipes-phosphor/interfaces/bmcweb_git.bb

You=E2=80=99d make = a recipe like this, point SRC_URI and SRCREV to your

code and = the commit id to pick up.

You=E2=80=99= d create your own service file, like bmcweb.service

(note the = service file is packaged in your repo).

(i.e. https://github.com/openbmc/bmcweb/blob/master/bmcweb.service.in= )

For the [Install] section you would just put the = following

to ensure your service was started on BMC boot = up.

WantedBy=3Dmulti-user.target

You=E2=80=99d = adjust the ExecStart to call your application

Note that bmcweb uses CMake but we=E2=80=99re = moving a lot of

projects to meson which is what I=E2=80=99d = recommend if you=E2=80=99re

creating a new = project.

https://gerrit.openbmc-project.xyz/c/openbmc/phosphor-state-man= ager/+/27878

is an example of adding service files to = meson.

Then you would go into a = packagegroup, like

https://github.com/openbmc/openbmc/blob/master/meta-phosphor/re= cipes-phosphor/packagegroups/packagegroup-obmc-apps.bb

and = do something similar to what they did with

bmcweb and add it = as an RDEPENDS

Then you would = bitbake your image and voila, your code would

be pulled down, = built, and packaged into the image. When you

start it in QEMU = you would see your application run.

If= you were writing something you thought would be useful

for = the community then you would send out an email and

write up a = design doc to get feedback on the right

location for the code = and recipe to go.

https://github.com/openbmc/docs/blob/master/designs/design-temp= late.md

Andrew

On Mon, Jan 20, 2020 at 1:57 AM Michael Richardson = <mcr@sandelman.ca> wrote:

Samuel Herts <sdherts@gmail.com> wrote:
> I am currently working on getting a working OpenBMC = test environment
> up and running. I am using VirtualBox and the github = Development
> Environment tutorial. I had a couple questions = regarding how to make
> our own modules. Would it be possible to upload files = to the bmc on
> the virtual server?

You can do that.
The disk is rather small by default.
If you are using VirtualBox, you may be able to use the vboxfs file = system to
mount the host. That might require adding modules to the kernel.

> And would I be able to make a script which can read = text off of that
> file inside the bmc chip?

> I have a physical server which I am not using yet, = would I be able to
> install openbmc and the scripts and insert the file = onto the actual
> bmc chip, and eventually read from that file?

Maybe. What server do you have?

--
] Never tell me = the odds! | = ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works = | IoT architect [
] mcr@sandelman.ca http://www.sandelman.ca/ = | ruby on rails [

Sincerely, Samuel Herts