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first proofreading pass

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Daniel Barlow 2023-09-15 00:32:18 +01:00
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@ -24,17 +24,18 @@ Requirements
************ ************
You will need a reasonably powerful computer running Nix. Devices You will need a reasonably powerful computer running Nix. Devices
that run Liminix are unlikely tohave the CPU power and disk space to that run Liminix are unlikely to have the CPU power and disk space to
be able to build it in situ, so the build process is based around be able to build it in situ, so the build process is based around
"cross-compilation" from another computer. The build machine can be "cross-compilation" from another computer. The build machine can be
any reasonably powerful desktop/laptop/server PC running NixOS. any reasonably powerful desktop/laptop/server PC running NixOS.
Standalone Nixpkgs installations on other Linux distribuions or MacOS Standalone Nixpkgs installations on other Linux distributions - or on
also ought to work (but I haven't tested that configuration) MacOS - also ought to work but are untested.
Running in Qemu Running in Qemu
*************** ***************
You can do this without even having a router to play with.
Clone the Liminix git repository and change into its directory Clone the Liminix git repository and change into its directory
@ -50,13 +51,13 @@ Now build Liminix
nix-build -I liminix-config=./examples/hellonet.nix \ nix-build -I liminix-config=./examples/hellonet.nix \
--arg device "import ./devices/qemu" -A outputs.default --arg device "import ./devices/qemu" -A outputs.default
In this command ``liminix-config`` points to the configuration for the In this command ``liminix-config`` points to the desired software
device (services, users, filesystem, secrets) and ``device`` is the configuration (e.g. services, users, filesystem, secrets) and
file for your hardware device definition. ``outputs.default`` tells ``device`` describes the hardware (or emulated hardware) to run it on.
Liminix to build the appropriate image output appropriate to ``outputs.default`` tells Liminix that we want the default image
flash to the hardware device: for the qemu "hardware" it's an alias output for flashing to the device: for the Qemu "hardware" it's an
for ``outputs.vmbuild``, which creates a directory containing a root alias for ``outputs.vmbuild``, which creates a directory containing a
filesystem image and a kernel. root filesystem image and a kernel.
.. tip:: The first time you run this it may take several hours, .. tip:: The first time you run this it may take several hours,
because it builds all of the dependencies including a full because it builds all of the dependencies including a full
@ -70,10 +71,11 @@ Now you can try it:
nix-shell --run "mips-vm ./result/vmlinux ./result/rootfs" nix-shell --run "mips-vm ./result/vmlinux ./result/rootfs"
This starts the Qemu emulator to run the Liminix configuration you This starts Qemu emulator with a bunch of useful options, to run
just built. It connects the Liminix serial console and the `QEMU the Liminix configuration you just built. It connects the Liminix
monitor <https://www.qemu.org/docs/master/system/monitor.html>`_ to serial console and the `QEMU monitor
stdin/stdout. Use ^P (not ^A) to switch to the monitor. <https://www.qemu.org/docs/master/system/monitor.html>`_ to
stdin/stdout.
You should now see Linux boot messages and after a few seconds be You should now see Linux boot messages and after a few seconds be
presented with a login prompt. You can login on the console as presented with a login prompt. You can login on the console as