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k-os/scripts/make-disk-image.sh

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#!/bin/bash
# Builds the k-os disk: one ext4 filesystem holding every program init may
# start. Init and storage themselves are packed into the kernel image.
set -euo pipefail
IMG="${IMG:-boot.img}"
SIZE="${SIZE:-16M}"
TARGET="riscv64gc-unknown-none-elf"
BUILD_DIR="target/${TARGET}/release"
# What the storage server's ext4 driver does not maintain, switched off so it
# can write to the disk (see storage-server's tests/ext4_real.rs).
FEATURES="^has_journal,^metadata_csum,^64bit,^dir_index,^huge_file,^orphan_file,^metadata_csum_seed"
ROOT="$(mktemp -d)"
trap 'rm -rf "${ROOT}"' EXIT
copy() {
local src="$1" dst="$2"
if [ -f "${BUILD_DIR}/${src}" ]; then
cp "${BUILD_DIR}/${src}" "${ROOT}/${dst}"
fi
}
copy echo "echo.elf"
copy snake "snake.elf"
copy display-qemu "display.elf"
copy input-qemu "input.elf"
copy log-server "log.elf"
copy permission-manager "permis.elf"
copy session-server "session.elf"
copy terminal-server "terminal.elf"
copy shell "shell.elf"
copy cat "cat.elf"
copy ls "ls.elf"
# Files that ship on the disk.
cp -r disk/. "${ROOT}/"
# Only the test image: its presence makes init run the self-test.
if [ -n "${SMPTEST:-}" ]; then
copy smptest "smptest.elf"
copy spawntest "spawntst.elf"
copy hello "hello.elf"
fi
rm -f "${IMG}"
mkfs.ext4 -q -F -b 4096 -L k-os -O "${FEATURES}" -d "${ROOT}" "${IMG}" "${SIZE}"
echo "=== ${IMG}: ext4, ${SIZE} ==="
ls -1 "${ROOT}"