BFE EngineeringandClaude Fable 5
abbc690277
ubuntu-latest ships shellcheck 0.9.0, which warns that ash scripts are checked as dash; 0.10 (local) does not. shell=dash is the accurate dialect for busybox ash. Verified clean under BOTH versions; boot smoke re-run. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018HUayid7W5w7jBdb9Rrj1K
97 lines
3.6 KiB
Plaintext
Executable File
97 lines
3.6 KiB
Plaintext
Executable File
#!/bin/busybox sh
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# shellcheck shell=dash
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# Stage-2 init: PID 1 on the disk rootfs (rootfs_a or rootfs_b), reached via
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# switch_root from the initramfs. Brings up the minimum a WardenOS userspace
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# needs — mounts, by-name symlinks, network, serial alias — then starts any
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# payload daemons and holds. This stands in for the device's BusyBox SysV
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# /etc/init.d/S* sequence; it is deliberately tiny, not a model of it.
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/bin/busybox mount -t devtmpfs devtmpfs /dev 2>/dev/null
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exec </dev/console >/dev/console 2>&1
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/bin/busybox --install -s /bin
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t tmpfs tmpfs /tmp
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# shellcheck source=qemu/rootfs/etc/warden-lib.sh disable=SC1091
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. /etc/warden-lib.sh
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# Fresh devtmpfs — repopulate the by-name contract; same VALIDATED slot rule
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# as stage 1 (shared helper, so the two can never drift).
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warden_populate_by_name
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slot="$(warden_slot)"
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# The device's matched mounts: persistent state and the slot's oem partition.
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# Fail-fast: a scenario against an image whose userdata cannot mount would
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# otherwise burn its whole deadline before failing generically. warden.shell
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# still gets a shell for post-mortem.
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mount_fatal() {
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if ! mount -t ext4 "/dev/block/by-name/$1" "$2"; then
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echo "WARDEN-QEMU-MOUNT-FAILED $1"
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if grep -qw warden.shell /proc/cmdline; then
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echo "warden.shell: post-mortem shell (exit powers off)"
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setsid cttyhack sh
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fi
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poweroff -f
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fi
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}
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mount_fatal userdata /userdata
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mount_fatal "oem${slot}" /oem
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mkdir -p /userdata/warden
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# RS485: warden-modbus hardcodes /dev/ttyS4 at compile time; alias it to the
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# VM's pci-serial UART when one is present (needs the virt.fragment kernel).
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[ -c /dev/ttyS0 ] && ln -sf /dev/ttyS0 /dev/ttyS4
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# Network: slirp user-mode net on eth0 (DHCP, fallback to QEMU's static map).
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# The fallback keys off the interface actually having an address — udhcpc
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# exiting 0 only proves a lease, not that the hook script applied it.
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ip link set lo up
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if [ -e /sys/class/net/eth0 ]; then
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ip link set eth0 up
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udhcpc -i eth0 -n -q -t 5 -T 2 >/dev/null 2>&1 || true
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if ! ip -4 addr show dev eth0 | grep -q 'inet '; then
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ip addr add 10.0.2.15/24 dev eth0 2>/dev/null
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ip route replace default via 10.0.2.2 dev eth0
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echo "nameserver 10.0.2.3" > /etc/resolv.conf
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fi
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fi
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hostname warden-qemu
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echo "WARDEN-QEMU-ROOTFS-OK slot=${slot}"
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# Payload daemons (dropped into /usr/bin by qemu/mkimage.sh from qemu/payload/).
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# WARDEN_FLARE_INSECURE=1: the VM's portal is the desk mock over plain HTTP.
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# This is a dev instrument — a production device build never sets it.
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export WARDEN_FLARE_INSECURE=1
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# No HPMCU on -M virt: the mailbox SRAM (0xff6fff00) is unmapped bus space
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# here, and flared's /dev/mem poke dies with an external abort (SIGBUS). The
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# SCR1 supervisor state machine is modeled in sim/src/hpmcu.rs instead.
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export WARDEN_HPMCU=0
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for d in /usr/bin/warden-flared /usr/bin/warden-modbus; do
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if [ -x "$d" ]; then
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name="$(basename "$d")"
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echo "init: starting $name"
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"$d" > "/tmp/${name}.log" 2>&1 &
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fi
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done
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# The UI (LVGL fbdev+evdev build from flare-edge tools/build-ui-vm.sh) needs
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# virtio-gpu's fbdev: present only with run.sh --display on|headless AND the
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# virt.fragment kernel.
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if [ -x /usr/bin/warden-ui ] && [ -c /dev/fb0 ]; then
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echo "init: starting warden-ui (fbdev)"
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/usr/bin/warden-ui > /tmp/warden-ui.log 2>&1 &
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fi
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if grep -qw warden.shell /proc/cmdline; then
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echo "warden.shell: interactive shell (exit powers off)"
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setsid cttyhack sh
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poweroff -f
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fi
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# Hold: daemons run, console idles, scenarios drive the VM from outside.
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while :; do sleep 3600; done
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