Red Bear OS — microkernel OS in Rust, based on Redox

Derivative of Redox OS (https://www.redox-os.org) adding:
- AMD GPU driver (amdgpu) via LinuxKPI compat layer
- ext4 filesystem support (ext4d scheme daemon)
- ACPI fixes for AMD bare metal (x2APIC, DMAR, IVRS, MCFG)
- Custom branding (hostname, os-release, boot identity)

Build system is full upstream Redox with RBOS overlay in local/.
Patches for kernel, base, and relibc are symlinked from local/patches/
and protected from make clean/distclean. Custom recipes live in
local/recipes/ with symlinks into the recipes/ search path.

Build:  make all CONFIG_NAME=redbear-full
Sync:   ./local/scripts/sync-upstream.sh

mk/disk.mk

@@ -0,0 +1,101 @@
+# Configuration file with the commands configuration of the Red Bear OS image
+
+$(BUILD)/harddrive.img: $(FSTOOLS) $(REPO_TAG)
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	mkdir -p $(BUILD)
+	-$(FUMOUNT) $(MOUNT_DIR) || true
+	-$(FUMOUNT) /tmp/redox_installer || true
+	rm -rf $@  $@.partial $(MOUNT_DIR)
+	FILESYSTEM_SIZE=$(FILESYSTEM_SIZE) && \
+	if [ -z "$$FILESYSTEM_SIZE" ] ; then \
+	FILESYSTEM_SIZE=$(shell $(INSTALLER) --filesystem-size -c $(FILESYSTEM_CONFIG)); \
+	fi && \
+	truncate -s "$$FILESYSTEM_SIZE"m $@.partial
+	umask 002 && $(INSTALLER) $(INSTALLER_OPTS) -c $(FILESYSTEM_CONFIG) $@.partial
+	mv $@.partial $@
+endif
+
+$(BUILD)/rbos-live.iso: $(FSTOOLS) $(REPO_TAG) rbos.ipxe
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	mkdir -p $(BUILD)
+	rm -rf $@  $@.partial
+	-$(FUMOUNT) /tmp/redox_installer || true
+	FILESYSTEM_SIZE=$(FILESYSTEM_SIZE) && \
+	if [ -z "$$FILESYSTEM_SIZE" ] ; then \
+	FILESYSTEM_SIZE=$(shell $(INSTALLER) --filesystem-size -c $(FILESYSTEM_CONFIG)); \
+	fi && \
+	truncate -s "$$FILESYSTEM_SIZE"m $@.partial
+	umask 002 && $(INSTALLER) $(INSTALLER_OPTS) -c $(FILESYSTEM_CONFIG) --write-bootloader="$(BUILD)/bootloader-live.efi" --live $@.partial
+	mv $@.partial $@
+	cp rbos.ipxe $(BUILD)/rbos.ipxe
+endif
+
+$(BUILD)/filesystem.img: $(FSTOOLS) $(REPO_TAG)
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	mkdir -p $(BUILD)
+	-$(FUMOUNT) $(MOUNT_DIR) || true
+	rm -rf $@  $@.partial $(MOUNT_DIR)
+	-$(FUMOUNT) /tmp/redox_installer || true
+	FILESYSTEM_SIZE=$(FILESYSTEM_SIZE) && \
+	if [ -z "$$FILESYSTEM_SIZE" ] ; then \
+	FILESYSTEM_SIZE=$(shell $(INSTALLER) --filesystem-size -c $(FILESYSTEM_CONFIG)); \
+	fi && \
+	truncate -s "$$FILESYSTEM_SIZE"m $@.partial
+	$(REDOXFS_MKFS) $(REDOXFS_MKFS_FLAGS) $@.partial
+	mkdir -p $(MOUNT_DIR)
+	$(REDOXFS) $@.partial $(MOUNT_DIR)
+	sleep 1
+	pgrep redoxfs
+	umask 002 && $(INSTALLER) $(INSTALLER_OPTS) -c $(FILESYSTEM_CONFIG) $(MOUNT_DIR)
+	sync
+	-$(FUMOUNT) $(MOUNT_DIR) || true
+	rm -rf $(MOUNT_DIR)
+	mv $@.partial $@
+endif
+
+mount: $(FSTOOLS) FORCE
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	@mkdir -p $(MOUNT_DIR)
+	$(REDOXFS) $(BUILD)/harddrive.img $(MOUNT_DIR)
+	@sleep 2
+	@echo "\033[1;36;49mharddrive.img mounted ($$(pgrep redoxfs))\033[0m"
+endif
+
+mount_extra: $(FSTOOLS) FORCE
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	@mkdir -p $(MOUNT_DIR)
+	$(REDOXFS) $(BUILD)/extra.img $(MOUNT_DIR)
+	@sleep 2
+	@echo "\033[1;36;49mextra.img mounted ($$(pgrep redoxfs))\033[0m"
+endif
+
+mount_live: $(FSTOOLS) FORCE
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	@mkdir -p $(MOUNT_DIR)
+	$(REDOXFS) $(BUILD)/rbos-live.iso $(MOUNT_DIR)
+	@sleep 2
+	@echo "\033[1;36;49mrbos-live.iso mounted ($$(pgrep redoxfs))\033[0m"
+endif
+
+unmount: FORCE
+ifeq ($(FSTOOLS_IN_PODMAN),1)
+	$(PODMAN_RUN) make $@
+else
+	@sync
+	-$(FUMOUNT) $(MOUNT_DIR)
+	@rm -rf $(MOUNT_DIR)
+	@-$(FUMOUNT) /tmp/redox_installer 2>/dev/null || true
+	@echo "\033[1;36;49mFilesystem unmounted\033[0m"
+endif