#!/bin/sh
# emergency-shell.sh — Drop to a debug shell on boot failure
# Called by init when a critical stage fails
# POSIX sh only — BusyBox ash compatible

echo "" >&2
echo "=====================================================" >&2
echo "  KubeSolo OS — Emergency Shell" >&2
echo "=====================================================" >&2
echo "" >&2
echo "  The boot process has failed. You have been dropped" >&2
echo "  into an emergency shell for debugging." >&2
echo "" >&2
echo "  Useful commands:" >&2
echo "    dmesg | tail -50       Kernel messages" >&2
echo "    cat /proc/cmdline      Boot parameters" >&2
echo "    cat /proc/mounts       Current mounts" >&2
echo "    blkid                  Block device info" >&2
echo "    ip addr                Network interfaces" >&2
echo "    ls /usr/lib/kubesolo-os/init.d/  Init stages" >&2
echo "" >&2

# Show version if available
if [ -f /etc/kubesolo-os-version ]; then
    echo "  OS Version: $(cat /etc/kubesolo-os-version)" >&2
fi

# Show what stage failed if known
if [ -n "${FAILED_STAGE:-}" ]; then
    echo "  Failed stage: $FAILED_STAGE" >&2
fi

echo "" >&2
echo "  Type 'exit' to attempt re-running the init sequence." >&2
echo "  Type 'reboot' to restart the system." >&2
echo "=====================================================" >&2
echo "" >&2

# Ensure basic env is usable
export PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin"
export PS1="[kubesolo-emergency] # "
export HOME=/root
export TERM="${TERM:-linux}"

# Create home dir if needed
mkdir -p /root

exec /bin/sh