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https://github.com/fosslinux/live-bootstrap.git
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WIP: Reduced userland full launch
This commit is contained in:
Alexandre Gomes Gaigalas
parent
63b24502c7
commit
dedaae3ea3
2 changed files with 269 additions and 0 deletions
214
qemu.sh
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214
qemu.sh
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#!/usr/bin/env sh
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# SPDX-FileCopyrightText: 2025 Alexandre Gomes Gaigalas <alganet@gmail.com>
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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set -euf
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# Runtime dependencies
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SH="${SH:-$(command -v sh)}"
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# Userland dependencies
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CAT="${CAT:-$(command -v cat)}"
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DD="${DD:-$(command -v dd)}"
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FIND="${FIND:-$(command -v find)}"
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MKDIR="${MKDIR:-$(command -v mkdir)}"
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WC="${WC:-$(command -v wc)}"
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# Emulation dependencies
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QEMU="${QEMU:-$(command -v qemu-system-i386)}"
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MKFIFO="${MKFIFO:-$(command -v mkfifo)}"
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NC="${NC:-$(command -v nc)}"
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# Don't look PATH anymore
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PATH=
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# Remember home folder
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SH_FILE="$PWD/$0"
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LB_ROOT="${SH_FILE%\/*}"
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# Reads from a pipe from `find` and writes a builder-hex0 compatible src,
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# optionally adding a $1 prefix to the destination filename
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to_builder_hex0_src () {
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local prefix="${1:-}"
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local fs_entry=
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local wc_out=
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while read -r fs_entry; do
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case $fs_entry in
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*'/.git'*) continue;; # Ignore lengthy .git filetrees
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esac
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if [ -d "$fs_entry" ]; then
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printf %s\\n "src 0 ${fs_entry#\.}"
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else
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wc_out="$($WC -c "$fs_entry")"
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printf %s\\n "src ${wc_out%% *} ${prefix}${fs_entry#\.}"
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$CAT "$fs_entry"
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fi
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done
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}
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# Walk the manifest looking for sources and does $1 on them
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walk_manifest_distfiles () {
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local action=$1
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local manifest_entry=
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local entry=
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local file=
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local walked=":"
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while read -r manifest_entry || [ -n "$manifest_entry" ]; do
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case $manifest_entry in
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'improve: get_network'*)
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break
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;;
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'build:'*)
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entry="${manifest_entry#'build: '}"
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entry="${entry%% *}"
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[ -e "./steps/${entry}/sources" ] || continue
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while read -r line; do
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file="${line##* }"
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if [ ! -e "./mirror/$file" ]; then
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file="${line##*\/}"
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file="${file%% *}"
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fi
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case $walked in *":$file:"*) continue;;esac
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walked="$walked$file:"
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$action "./distfiles/$file"
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done < "./steps/${entry}/sources"
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;;
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esac
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done < "./steps/manifest"
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}
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cd "$LB_ROOT"
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$MKDIR "$LB_ROOT/target"
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$MKDIR "$LB_ROOT/target/steps"
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$CAT <<@ > "$LB_ROOT/steps/bootstrap.cfg"
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ARCH=x86
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ARCH_DIR=x86
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FORCE_TIMESTAMPS=False
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CHROOT=False
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UPDATE_CHECKSUMS=False
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JOBS=6
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SWAP_SIZE=0
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FINAL_JOBS=6
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INTERNAL_CI=False
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INTERACTIVE=False
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BARE_METAL=False
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QEMU=True
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DISK=sda
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KERNEL_BOOTSTRAP=True
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BUILD_KERNELS=True
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CONFIGURATOR=False
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MIRRORS="http://10.0.2.2:42645"
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MIRRORS_LEN=1
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@
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# Creates ./target/init.builder-hex0-src
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{
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printf %s\\n "Copying stage0-posix..." 1>&2
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cd "$LB_ROOT/seed/stage0-posix";
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$FIND ./ | to_builder_hex0_src
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printf %s\\n "Copying seed folder..." 1>&2
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cd "$LB_ROOT/seed";
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$FIND ./ -maxdepth 1 | to_builder_hex0_src
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# Write steps
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printf %s\\n "Copying steps..." 1>&2
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cd "$LB_ROOT"
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printf %s\\n "src 0 /steps"
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$FIND ./steps | to_builder_hex0_src
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# Write distfiles as /external/distfiles
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cd "$LB_ROOT";
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printf %s\\n "src 0 /external"
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printf %s\\n "src 0 /external/distfiles"
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printf %s\\n "Copying distfiles..." 1>&2
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walk_manifest_distfiles echo | to_builder_hex0_src "/external"
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# Initialization sequence
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printf %s\\n "src 0 /dev"
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printf %s\\n "src 0 /bootstrap-seeds"
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printf %s\\n "src 0 /bootstrap-seeds/POSIX"
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printf %s\\n "src 0 /bootstrap-seeds/POSIX/x86"
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printf %s\\n "hex0 /x86/hex0_x86.hex0 /bootstrap-seeds/POSIX/x86/hex0-seed"
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printf %s\\n "hex0 /x86/kaem-minimal.hex0 /bootstrap-seeds/POSIX/x86/kaem-optional-seed"
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printf %s\\n "hex0 /x86/kaem-minimal.hex0 /init"
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printf %s\\n "/bootstrap-seeds/POSIX/x86/kaem-optional-seed /kaem.x86"
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} >> ./target/init.builder-hex0-src
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# Creates the builder_hex0 image
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printf %s\\n "Creating image (this might take a while)..." 1>&2
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$DD if=/dev/zero of="target/init.img" bs=512 count=33554432
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$DD if=seed/stage0-posix/bootstrap-seeds/NATIVE/x86/builder-hex0-x86-stage1.img of="target/init.img" conv=notrunc
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$DD if="builder-hex0/builder-hex0-x86-stage2.hex0" of="target/init.img" seek=1 bs=512 conv=notrunc
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STAGE2_LEN="$($WC -c builder-hex0/builder-hex0-x86-stage2.hex0)"
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STAGE2_LEN="${STAGE2_LEN% *}"
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if [ $((STAGE2_LEN % 512)) = 0 ]; then
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STAGE2_SECTORS=$((STAGE2_LEN / 512))
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else
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STAGE2_SECTORS=$((STAGE2_LEN / 512 + 1))
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fi
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SRC_LBA_SECTOR=$((STAGE2_SECTORS + 1))
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# Appends the generated source to the image
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printf %s\\n "Adding sources to image..." 1>&2
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$DD if="target/init.builder-hex0-src" of="target/init.img" seek=$SRC_LBA_SECTOR bs=512 conv=notrunc
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# Starts a simple HTTP file server for ./distfiles in the background
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{
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$MKFIFO $LB_ROOT/target/httpmirror.fifo
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while true; do
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$NC -l 127.0.0.1 42645 < $LB_ROOT/target/httpmirror.fifo | {
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ret="$(printf \\r)"
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while read -r line; do
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case $line in
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'GET /'*)
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distfile="${line#* \/}"
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distfile="${distfile% *}"
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;;
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"$ret")
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break
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;;
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*)
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continue
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;;
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esac
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done
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if ! [ -f "$LB_ROOT/mirror/$distfile" ]; then
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echo "HTTP/1.1 404 Not Found"
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echo "Content-Length: 0"
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echo "Connection: close"
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printf \\r\\n\\r\\n
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else
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echo "HTTP/1.1 200 OK"
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echo "Content-Length: $($WC -c "$LB_ROOT/mirror/$distfile")"
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echo "Connection: close"
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printf \\r\\n\\r\\n
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$CAT "$LB_ROOT/mirror/$distfile"
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fi
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} > $LB_ROOT/target/httpmirror.fifo
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done
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} &
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HTTPMIRROR_PID=$!
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# Launch image
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$QEMU \
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--enable-kvm \
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-m 4G \
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-smp 6 \
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-nographic \
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-no-reboot \
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-nic user,ipv6=off,model=e1000 \
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-drive file="target/init.img",format=raw \
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-machine kernel-irqchip=split || :
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kill -9 $HTTPMIRROR_PID
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