Starnix is a component that runs Linux binaries on Fuchsia. Currently, starnix is highly experimental and can run only trivial programs.
Currently, we require a x86_64 host Linux system to run starnix.
We cannot currently build an appropriate binary with the Fuchsia build system, which means you'll need to manually build a Linux binary.
$ cd src/proc/bin/starnix/fixtures $ ./build.sh
Next, edit the //src/proc/bin/starnix/BUILD.gn file and uncomment the lines indicated by comments about testing locally.
In //src/sys/component_manager/src/elf_runner/mod.rs, comment out the code block that prevents direct creation of processes. To find the code block, look for the comment “Prevent direct creation of processes”.
In order to run starnix, we need to build both //src/proc and //examples:
$ fx set core.x64 --with //examples,//src/proc,//src/proc:tests $ fx build
Run Fuchsia as normal, for example using fx serve and fx emu -N.
To monitor starnix, look for log messages with the starnix tag:
fx log --tag starnix
Now, you're ready to run starnix. Unfortunately, component framework v2 does not have a way to start components manually (see https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=70952), so we need to start a nested v2 component manager inside the component framework v1 and instruct that component manager to run starnix:
$ fx shell 'run fuchsia-pkg://fuchsia.com/components-basic-example#meta/component_manager_for_examples.cmx fuchsia-pkg://fuchsia.com/starnix#meta/starnix_manager.cm'
If everything is working, you should see some log messages like the following:
[00064.846853][33707][33709][starnix, starnix] INFO: main [00064.847640][33707][33709][starnix, starnix] INFO: start_component: fuchsia-pkg://fuchsia.com/hello_starnix#meta/hello_starnix.cm