Marc S. Weidner
2e50dd9535
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
223 lines
6.4 KiB
Bash
223 lines
6.4 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-10-06; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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set -Ceuo pipefail
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umask 0077
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declare -grx VAR_SEMAPHORE="/root/cdi.ciss" # Semaphore to appear.
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declare -girx VAR_TIMEOUT=3600 # Semaphore timer in seconds.
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install -d -m 0755 /run/lock
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exec 9> /run/lock/9999_cdi_starter.lock
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flock -n 9 || { echo "9999_cdi_starter already running. Exiting."; exit 0; }
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#######################################
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# Call into the CISS.debian.installer once the semaphore file is present.
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# Globals:
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# None
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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cdi() {
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### Declare Arrays, HashMaps, and Variables.
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declare -i rc=""
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./ciss_debian_installer.sh \
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--autoinstall \
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--debug XTRACE \
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--log debug \
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--reionice-priority 1 0 \
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--renice-priority "-19" \
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rc="$?"
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if [[ "${rc}" -eq 0 ]]; then
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### In autoinstall mode this command should never be reached due to the reboot command inside ciss_debian_installer.sh.
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logger -t cdi-watcher "cdi(): ciss_debian_installer.sh completed SUCCESSFULLY [${rc}]."
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exit 0
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else
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logger -t cdi-watcher "cdi(): ciss_debian_installer.sh FAILED [${rc}]."
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exit "${rc}"
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fi
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f cdi
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#######################################
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# Wait for network connectivity by looping.
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# Globals:
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# None
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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net_wait() {
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### Declare Arrays, HashMaps, and Variables.
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declare -i i
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for ((i=1; i<=60; i++)); do
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if getent hosts git.coresecret.dev >/dev/null 2>&1; then
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return 0
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fi
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sleep 1
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done
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return 1
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f net_wait
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#######################################
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# Wrapper for loading CISS hardened Kernel Parameters.
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# Globals:
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# None
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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sysp() {
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sysctl -p /etc/sysctl.d/99_local.hardened
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# shellcheck disable=SC2312
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sysctl -a | grep -E '^(kernel|vm|net)\.' >| "/var/log/sysctl_check_$(date +'%Y-%m-%d_%H-%M-%S').log"
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return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f sysp
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#######################################
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# Main autostart function.
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# Arguments:
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# None
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#######################################
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main() {
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### Declare Arrays, HashMaps, and Variables.
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declare -r var_repo_url="https://git.coresecret.dev/msw/CISS.debian.installer.git"
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declare -r var_repo_dir="/root/git/CISS.debian.installer"
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declare -i i=""
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declare var_log="" var_mode=""
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### Prepare logging.
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install -d -m 0700 /root/.ciss/cdi
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install -d -m 0700 /root/.ciss/cdi/log
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var_log="/root/.ciss/cdi/log/9999-cdi-starter_$(date +"%Y-%m-%d_%H-%M-%S").log"
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touch "${var_log}"
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printf "CISS.debian.installer Master V8.13.768.2025.12.06 is up! \n" >> "${var_log}"
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### Sleep a moment to settle boot artifacts.
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sleep 8
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### Harden Kernel parameters.
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printf "Command: [sysp] to be executed ... \n" >> "${var_log}"
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sysp
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printf "Command: [sysp] executed.\n" >> "${var_log}"
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### Wait for network connectivity.
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printf "Command: [net_wait] to be executed ... \n" >> "${var_log}"
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# shellcheck disable=SC2310
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if ! net_wait; then
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logger -t cdi-watcher "Network/DNS not available after 60s; skipping online bootstrap."
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printf "Command: [net_wait] no DNS/network after 60s; skipping apt/git bootstrap.\n" >> "${var_log}"
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### Do not mark the service as failed when the system is simply offline.
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exit 0
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fi
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printf "Command: [net_wait] executed.\n" >> "${var_log}"
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### apt update.
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if ! apt-get update >> "${var_log}"; then
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logger -t cdi-watcher "apt-get update failed; continuing without package refresh."
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printf "Command: [apt-get update] failed; continuing without package refresh.\n" >> "${var_log}"
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fi
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### Download CISS.debian.installer.
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install -d -m 0700 /root/git
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cd /root/git
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[[ -d "${var_repo_dir}" ]] && rm -rf "${var_repo_dir}"
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if ! git clone "${var_repo_url}" "${var_repo_dir}"; then
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logger -t cdi-watcher "git clone of ${var_repo_url} failed; aborting CDI autostart."
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printf "Command: [git clone %s %s] failed; aborting CDI autostart.\n" "${var_repo_url}" "${var_repo_dir}" >> "${var_log}"
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exit 0
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fi
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chmod 0700 "${var_repo_dir}/ciss_debian_installer.sh"
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cd "${var_repo_dir}"
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printf "Command: [git clone %s %s] executed.\n" "${var_repo_url}" "${var_repo_dir}" >> "${var_log}"
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### Poll up to VAR_TIMEOUT seconds for the semaphore to appear and be mode 0600.
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for ((i=0; i<VAR_TIMEOUT; i++)); do
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if [[ -e "${VAR_SEMAPHORE}" && ! -s "${VAR_SEMAPHORE}" ]]; then
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var_mode="$(stat -c '%a' -- "${VAR_SEMAPHORE}" 2>/dev/null || echo '?')"
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if [[ "${var_mode}" == "600" ]]; then
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logger -t cdi-watcher "Semaphore found (${VAR_SEMAPHORE}, mode 0600) after ${i}s -> invoking cdi()"
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printf "Command: [cdi] to be executed.\n" >> "${var_log}"
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cdi
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### cdi() never returns (it exits the script), so no code below this point in the 'then'-block will run.
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else
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logger -t cdi-watcher "Semaphore ${VAR_SEMAPHORE} present but wrong mode ${var_mode} (expected 600); ignoring"
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printf "INFO: [Semaphore %s present but wrong mode %s (expected 600); ignoring] executed.\n" "${VAR_SEMAPHORE}" "${var_mode}" >> "${var_log}"
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fi
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fi
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sleep 1
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done
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### Timeout reached without acceptable semaphore.
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logger -t cdi-watcher "No valid semaphore ${VAR_SEMAPHORE} (mode 0600) within ${VAR_TIMEOUT}s; exiting idle."
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printf "CISS.debian.installer Master V8.13.768.2025.12.06: No valid semaphore [%s] within [%s]s.\n" "${VAR_SEMAPHORE}" "${VAR_TIMEOUT}" >> "${var_log}"
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exit 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f main
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main "$@"
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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