#!/bin/sh

set -eu

# 把 usbnet 共用的 authorized_keys 同步到几处常见 root SSH 目录，
# 避免不同 sshd/dropbear 读取路径不一致。

TS="$(date +%Y%m%d-%H%M%S 2>/dev/null || echo now)"
OUT_DIR="/mnt/us/ssh-debug/${TS}"
LOG_FILE="${OUT_DIR}/fix-all-keys.log"
SOURCE_KEYS="/mnt/us/usbnet/etc/authorized_keys"

mkdir -p "${OUT_DIR}"
exec >"${LOG_FILE}" 2>&1

ROOT_HOME="$(awk -F: '/^root:/{print $6}' /etc/passwd 2>/dev/null || true)"
[ -n "${ROOT_HOME}" ] || ROOT_HOME="/tmp/root"

echo "Root home: ${ROOT_HOME}"
echo "Source keys: ${SOURCE_KEYS}"

for target_dir in "${ROOT_HOME}/.ssh" /root/.ssh /var/local/root/.ssh /mnt/us/usbnet/etc/dot.ssh; do
    echo "--- target: ${target_dir} ---"
    mkdir -p "${target_dir}"
    if [ -f "${target_dir}/authorized_keys" ]; then
        cp "${target_dir}/authorized_keys" "${target_dir}/authorized_keys.bak.${TS}" || true
    fi
    cp "${SOURCE_KEYS}" "${target_dir}/authorized_keys"
    chmod 700 "${target_dir}" 2>/dev/null || true
    chmod 600 "${target_dir}/authorized_keys" 2>/dev/null || true
    ls -ld "${target_dir}" "${target_dir}/authorized_keys" 2>/dev/null || true
done

killall -HUP sshd 2>/dev/null || true

echo
echo "=== DONE ==="
echo "${OUT_DIR}"