456 lines
20 KiB
Bash
456 lines
20 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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readonly SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
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readonly INSTALL_DIR="/scert"
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readonly DEFAULT_CERTIFICATE_DIR="/ssl"
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readonly SERVICE_USER="Scert"
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readonly SERVICE_GROUP="Scert"
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readonly SERVICE_DIR="/etc/systemd/system"
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readonly SERVICE_DROP_IN_DIR="$SERVICE_DIR/Scert.service.d"
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readonly INSTALL_METADATA_FILE="$INSTALL_DIR/conf/installation.json"
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source_dir="$SCRIPT_DIR"
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certificate_dir="$DEFAULT_CERTIFICATE_DIR"
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certificate_dir_explicit=false
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nologin_shell=""
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transaction_dir=""
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transaction_active=false
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declare -a transaction_targets=()
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print_usage() {
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cat <<'USAGE'
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Scert Linux 安装器
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用法：
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sudo ./install-linux.sh [选项]
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选项：
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--source-dir DIR 安装产物目录，必须包含 scert 和 scert-admin
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--certificate-dir DIR 证书根目录，默认 /ssl
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-h, --help 显示帮助
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Linux 安装目录固定为 /scert，证书业务目录可在首次初始化时继续配置。
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安装器只负责安装文件、创建运行用户和目录、注册 systemd unit，并执行一次
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systemctl daemon-reload。安装器不会启动或启用 Scert-admin，也不会创建公网防火墙规则。
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USAGE
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}
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fail() {
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printf '安装失败：%s\n' "$1" >&2
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exit 1
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}
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parse_args() {
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while (($# > 0)); do
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case "$1" in
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--source-dir)
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(($# >= 2)) || fail "--source-dir 缺少参数"
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source_dir="$2"
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shift 2
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;;
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--certificate-dir)
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(($# >= 2)) || fail "--certificate-dir 缺少参数"
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certificate_dir="$2"
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certificate_dir_explicit=true
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shift 2
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;;
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-h|--help)
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print_usage
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exit 0
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;;
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*)
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fail "不支持的参数：$1"
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;;
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esac
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done
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}
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load_existing_certificate_dir() {
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if [[ "$certificate_dir_explicit" == "true" || ! -e "$INSTALL_METADATA_FILE" ]]; then
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return
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fi
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reject_symlink_path "$INSTALL_METADATA_FILE" "安装路径记录"
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[[ -f "$INSTALL_METADATA_FILE" ]] || fail "安装路径记录必须是普通文件：$INSTALL_METADATA_FILE"
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local line
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local existing_certificate_dir=""
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while IFS= read -r line; do
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if [[ "$line" =~ \"certificate_root\"[[:space:]]*:[[:space:]]*\"([^\"]+)\" ]]; then
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existing_certificate_dir="${BASH_REMATCH[1]}"
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break
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fi
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done < "$INSTALL_METADATA_FILE"
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[[ -n "$existing_certificate_dir" ]] || fail "无法从既有安装记录读取证书目录，请显式使用 --certificate-dir"
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certificate_dir="$existing_certificate_dir"
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}
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validate_certificate_dir() {
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[[ "$certificate_dir" == /* ]] || fail "证书目录必须是绝对路径"
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[[ "$certificate_dir" != "/" ]] || fail "证书目录不能是根目录"
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[[ "$certificate_dir" =~ ^/[A-Za-z0-9._/-]+$ ]] || fail "证书目录只能包含字母、数字、点、下划线、连字符和斜杠"
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[[ ! "$certificate_dir" =~ (^|/)\.\.(/|$) ]] || fail "证书目录不能包含上级目录片段"
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reject_symlink_path "$certificate_dir" "证书目录"
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certificate_dir="$(readlink -m -- "$certificate_dir")"
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[[ "$certificate_dir" != "/" ]] || fail "证书目录不能是根目录"
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case "$certificate_dir" in
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/bin|/bin/*|/boot|/boot/*|/dev|/dev/*|/etc|/etc/*|/home|/home/*|/lib|/lib/*|/lib64|/lib64/*|/proc|/proc/*|/root|/root/*|/run|/run/*|/sbin|/sbin/*|/sys|/sys/*|/tmp|/tmp/*|/usr|/usr/*)
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fail "证书目录不能位于受保护的系统路径：$certificate_dir"
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;;
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/var|/var/*)
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case "$certificate_dir" in
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/var/lib/scert|/var/lib/scert/*) ;;
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*) fail "证书目录只能使用 /var/lib/scert 下的专用路径：$certificate_dir" ;;
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esac
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;;
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/scert|/scert/*)
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fail "证书目录不能覆盖 Scert 的安装、配置、数据、日志、备份或文档目录：$certificate_dir"
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;;
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esac
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}
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reject_symlink_path() {
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local target_path="$1"
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local description="$2"
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local current_path=""
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local part
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local -a path_parts
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IFS='/' read -r -a path_parts <<< "${target_path#/}"
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for part in "${path_parts[@]}"; do
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[[ -n "$part" ]] || continue
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current_path="$current_path/$part"
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if [[ -L "$current_path" ]]; then
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fail "$description 不能包含符号链接：$current_path"
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fi
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done
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}
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validate_managed_paths() {
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local managed_path
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for managed_path in \
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"$INSTALL_DIR" \
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"$INSTALL_DIR/conf" \
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"$INSTALL_DIR/data" \
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"$INSTALL_DIR/log" \
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"$INSTALL_DIR/backups" \
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"$INSTALL_DIR/docs" \
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"$INSTALL_DIR/web" \
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"$INSTALL_DIR/scert" \
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"$INSTALL_DIR/scert-admin" \
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"$INSTALL_DIR/scert-storage" \
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"$INSTALL_METADATA_FILE" \
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"$INSTALL_DIR/docs/Scert-service-management.md" \
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"$INSTALL_DIR/docs/Scert-admin-service-management.md" \
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"$SERVICE_DIR/Scert.service" \
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"$SERVICE_DIR/Scert-admin.service" \
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"$SERVICE_DIR/Scert-storage.service" \
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"$SERVICE_DIR/Scert-storage.socket" \
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"$SERVICE_DROP_IN_DIR" \
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"$SERVICE_DROP_IN_DIR/10-certificate-path.conf"; do
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reject_symlink_path "$managed_path" "Scert 受管路径"
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done
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for managed_path in "$INSTALL_DIR" "$INSTALL_DIR/conf" "$INSTALL_DIR/data" \
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"$INSTALL_DIR/log" "$INSTALL_DIR/backups" "$INSTALL_DIR/docs" \
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"$INSTALL_DIR/web" "$SERVICE_DIR" "$SERVICE_DROP_IN_DIR"; do
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[[ ! -e "$managed_path" || -d "$managed_path" ]] || fail "Scert 目录路径不是普通目录：$managed_path"
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done
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for managed_path in "$INSTALL_DIR/scert" "$INSTALL_DIR/scert-admin" "$INSTALL_DIR/scert-storage" \
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"$INSTALL_METADATA_FILE" "$INSTALL_DIR/docs/Scert-service-management.md" \
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"$INSTALL_DIR/docs/Scert-admin-service-management.md" \
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"$SERVICE_DIR/Scert.service" "$SERVICE_DIR/Scert-admin.service" "$SERVICE_DIR/Scert-storage.service" "$SERVICE_DIR/Scert-storage.socket" \
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"$SERVICE_DROP_IN_DIR/10-certificate-path.conf"; do
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[[ ! -e "$managed_path" || -f "$managed_path" ]] || fail "Scert 文件路径不是普通文件：$managed_path"
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done
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if [[ -d "$INSTALL_DIR/web" ]]; then
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[[ -z "$(find "$INSTALL_DIR/web" ! -type f ! -type d -print -quit)" ]] || fail "既有 Web 目录包含符号链接或特殊文件，拒绝覆盖"
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fi
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}
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validate_environment() {
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[[ "$(uname -s)" == "Linux" ]] || fail "此安装器只支持 Linux"
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[[ "$(id -u)" -eq 0 ]] || fail "请使用 root 或 sudo 运行安装器"
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local command_name
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for command_name in install systemctl getent groupadd useradd id chmod chown cut grep readlink find file mv cp mktemp; do
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command -v "$command_name" >/dev/null 2>&1 || fail "找不到系统命令：$command_name"
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done
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nologin_shell="$(command -v nologin || true)"
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[[ -n "$nologin_shell" ]] || fail "找不到 nologin，无法创建禁止登录的服务用户"
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load_existing_certificate_dir
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validate_certificate_dir
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validate_managed_paths
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}
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validate_artifacts() {
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[[ -d "$source_dir" ]] || fail "安装产物目录不存在：$source_dir"
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source_dir="$(cd -- "$source_dir" && pwd -P)"
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case "$source_dir/" in
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"$INSTALL_DIR/"|"$INSTALL_DIR/web/"*) fail "不能从正在替换的安装文件或 Web 目录安装" ;;
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esac
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local artifact
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for artifact in scert scert-admin scert-storage; do
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[[ -f "$source_dir/$artifact" && ! -L "$source_dir/$artifact" ]] || fail "安装产物必须是普通文件：$source_dir/$artifact"
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[[ -r "$source_dir/$artifact" && -x "$source_dir/$artifact" ]] || fail "安装产物不可读取或执行：$source_dir/$artifact"
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local artifact_description
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artifact_description="$(LC_ALL=C file -b -- "$source_dir/$artifact")"
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[[ "$artifact_description" == *"ELF 64-bit LSB"* && "$artifact_description" == *"x86-64"* ]] || \
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fail "安装产物不是 Linux amd64 ELF：$source_dir/$artifact"
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done
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[[ -f "$source_dir/web/index.html" && ! -L "$source_dir/web/index.html" ]] || fail "缺少普通前端入口文件：$source_dir/web/index.html"
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[[ -z "$(find "$source_dir/web" -type l -print -quit)" ]] || fail "Web 安装产物不能包含符号链接"
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[[ -z "$(find "$source_dir/web" ! -type f ! -type d -print -quit)" ]] || fail "Web 安装产物包含不支持的特殊文件"
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[[ -f "$SCRIPT_DIR/systemd/Scert.service" && ! -L "$SCRIPT_DIR/systemd/Scert.service" ]] || fail "缺少普通 Scert systemd unit"
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[[ -f "$SCRIPT_DIR/systemd/Scert-admin.service" && ! -L "$SCRIPT_DIR/systemd/Scert-admin.service" ]] || fail "缺少普通 Scert-admin systemd unit"
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[[ -f "$SCRIPT_DIR/systemd/Scert-storage.service" && ! -L "$SCRIPT_DIR/systemd/Scert-storage.service" ]] || fail "缺少证书目录服务单元"
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[[ -f "$SCRIPT_DIR/systemd/Scert-storage.socket" && ! -L "$SCRIPT_DIR/systemd/Scert-storage.socket" ]] || fail "缺少证书目录本机通道单元"
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[[ -f "$SCRIPT_DIR/systemd/Scert-admin服务管理说明.md" && ! -L "$SCRIPT_DIR/systemd/Scert-admin服务管理说明.md" ]] || fail "缺少普通 Scert-admin 服务管理说明"
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[[ -f "$SCRIPT_DIR/systemd/Scert服务管理说明.md" && ! -L "$SCRIPT_DIR/systemd/Scert服务管理说明.md" ]] || fail "缺少普通 Scert 服务管理说明"
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}
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begin_install_transaction() {
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install -d -o root -g "$SERVICE_GROUP" -m 0750 "$INSTALL_DIR"
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transaction_dir="$(mktemp -d "$INSTALL_DIR/.install-XXXXXXXX")"
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chmod 0700 "$transaction_dir"
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transaction_targets=(
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"$INSTALL_METADATA_FILE" "$INSTALL_DIR/scert" "$INSTALL_DIR/scert-admin"
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"$INSTALL_DIR/scert-storage" "$SERVICE_DIR/Scert-storage.service" "$SERVICE_DIR/Scert-storage.socket"
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"$INSTALL_DIR/web" "$SERVICE_DIR/Scert.service" "$SERVICE_DIR/Scert-admin.service"
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"$SERVICE_DROP_IN_DIR/10-certificate-path.conf"
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"$INSTALL_DIR/docs/Scert-service-management.md"
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"$INSTALL_DIR/docs/Scert-admin-service-management.md"
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)
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local index target
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for index in "${!transaction_targets[@]}"; do
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target="${transaction_targets[$index]}"
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printf '%s\n' "$target" >> "$transaction_dir/targets.txt"
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if [[ -e "$target" ]]; then
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cp -a -- "$target" "$transaction_dir/before-$index"
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fi
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done
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transaction_active=true
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}
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finish_install_transaction() {
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local status=$?
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trap - EXIT INT TERM
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if [[ "$transaction_active" != "true" ]]; then
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exit "$status"
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fi
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set +e
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local index target
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local rollback_failed=false
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for ((index=${#transaction_targets[@]}-1; index>=0; index--)); do
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target="${transaction_targets[$index]}"
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if [[ -e "$target" || -L "$target" ]]; then
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if ! mv -T -- "$target" "$transaction_dir/failed-$index"; then
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printf '无法保留失败文件，请人工恢复：%s\n' "$target" >&2
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rollback_failed=true
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continue
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fi
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fi
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if [[ -e "$transaction_dir/before-$index" ]]; then
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if ! mv -T -- "$transaction_dir/before-$index" "$target"; then
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printf '无法恢复升级前文件，请人工恢复：%s\n' "$target" >&2
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rollback_failed=true
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fi
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fi
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done
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if ! reload_systemd; then
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rollback_failed=true
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fi
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if [[ "$rollback_failed" == "true" ]]; then
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printf '安装回退不完整，禁止启动服务。恢复记录：%s\n' "$transaction_dir" >&2
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else
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printf '安装失败，已恢复升级前发布文件，服务保持停止。失败现场：%s\n' "$transaction_dir" >&2
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fi
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[[ "$status" -ne 0 ]] || status=1
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exit "$status"
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}
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ensure_services_stopped() {
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local unit properties key value
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local load_state active_state sub_state main_pid control_pid job
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for unit in Scert.service Scert-admin.service Scert-storage.service Scert-storage.socket; do
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if ! properties="$(systemctl show "$unit" -p LoadState -p ActiveState -p SubState -p MainPID -p ControlPID -p Job)"; then
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fail "无法查询 $unit 的停服状态，拒绝安装"
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fi
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load_state="" active_state="" sub_state="" main_pid="" control_pid="" job="unknown"
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while IFS='=' read -r key value; do
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case "$key" in
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LoadState) load_state="$value" ;;
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ActiveState) active_state="$value" ;;
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SubState) sub_state="$value" ;;
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MainPID) main_pid="$value" ;;
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ControlPID) control_pid="$value" ;;
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Job) job="$value" ;;
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esac
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done <<< "$properties"
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# 查询失败、过渡状态或排队任务均不能作为已停服的证据。
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case "$load_state:$active_state:$sub_state" in
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loaded:inactive:dead|loaded:failed:failed|not-found:inactive:dead) ;;
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*) fail "升级或安装前必须确认 $unit 已停止，当前状态：$load_state/$active_state/$sub_state" ;;
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esac
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if [[ "$unit" == *.socket && -z "$main_pid" ]]; then
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main_pid="0"
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fi
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[[ "$main_pid" == "0" && "$control_pid" == "0" && -z "$job" ]] || \
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fail "$unit 仍有进程、排队任务或缺失状态，拒绝安装"
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done
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}
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ensure_service_account() {
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if ! getent group "$SERVICE_GROUP" >/dev/null 2>&1; then
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if ! groupadd --system "$SERVICE_GROUP"; then
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if groupadd --help 2>&1 | grep -q -- '--badname'; then
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groupadd --system --badname "$SERVICE_GROUP"
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else
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fail "当前系统无法创建名称为 $SERVICE_GROUP 的系统用户组"
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fi
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fi
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fi
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if ! id "$SERVICE_USER" >/dev/null 2>&1; then
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if ! useradd --system --gid "$SERVICE_GROUP" --home-dir "$INSTALL_DIR" --shell "$nologin_shell" "$SERVICE_USER"; then
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if useradd --help 2>&1 | grep -q -- '--badname'; then
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useradd --system --badname --gid "$SERVICE_GROUP" --home-dir "$INSTALL_DIR" --shell "$nologin_shell" "$SERVICE_USER"
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else
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fail "当前系统无法创建名称为 $SERVICE_USER 的系统用户"
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fi
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fi
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fi
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[[ "$(id -gn "$SERVICE_USER")" == "$SERVICE_GROUP" ]] || fail "用户 $SERVICE_USER 未使用预期用户组 $SERVICE_GROUP"
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local current_shell
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current_shell="$(getent passwd "$SERVICE_USER" | cut -d: -f7)"
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case "$current_shell" in
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*/nologin|*/false) ;;
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*) fail "现有用户 $SERVICE_USER 允许交互式登录，请先修正其登录 Shell" ;;
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esac
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}
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create_directories() {
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install -d -o root -g "$SERVICE_GROUP" -m 0750 "$INSTALL_DIR"
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install -d -o root -g root -m 0755 "$INSTALL_DIR/docs"
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install -d -o root -g root -m 0755 "$INSTALL_DIR/web"
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install -d -o "$SERVICE_USER" -g "$SERVICE_GROUP" -m 0750 \
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"$INSTALL_DIR/conf" \
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"$INSTALL_DIR/data" \
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"$INSTALL_DIR/log" \
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"$INSTALL_DIR/backups"
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install -d -o "$SERVICE_USER" -g "$SERVICE_GROUP" -m 0750 "$certificate_dir"
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chown -R -h "$SERVICE_USER:$SERVICE_GROUP" \
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"$INSTALL_DIR/conf" \
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"$INSTALL_DIR/data" \
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"$INSTALL_DIR/log" \
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"$INSTALL_DIR/backups"
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chmod 0700 "$INSTALL_DIR/conf"
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local sensitive_file
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for sensitive_file in scert.json master.key secrets.json; do
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if [[ -f "$INSTALL_DIR/conf/$sensitive_file" ]]; then
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chown "$SERVICE_USER:$SERVICE_GROUP" "$INSTALL_DIR/conf/$sensitive_file"
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chmod 0600 "$INSTALL_DIR/conf/$sensitive_file"
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fi
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done
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}
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write_install_metadata() {
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local temporary_file="$INSTALL_METADATA_FILE.new.$$"
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printf '{\n "certificate_root": "%s"\n}\n' "$certificate_dir" > "$temporary_file"
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chown root:"$SERVICE_GROUP" "$temporary_file"
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chmod 0640 "$temporary_file"
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mv -fT -- "$temporary_file" "$INSTALL_METADATA_FILE"
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}
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install_binaries() {
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local main_temporary="$INSTALL_DIR/.scert.new.$$"
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local admin_temporary="$INSTALL_DIR/.scert-admin.new.$$"
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install -o root -g root -m 0755 "$source_dir/scert" "$main_temporary"
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install -o root -g root -m 0755 "$source_dir/scert-admin" "$admin_temporary"
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mv -fT -- "$main_temporary" "$INSTALL_DIR/scert"
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mv -fT -- "$admin_temporary" "$INSTALL_DIR/scert-admin"
|
||
local storage_temporary="$INSTALL_DIR/.scert-storage.new.$$"
|
||
install -o root -g root -m 0755 "$source_dir/scert-storage" "$storage_temporary"
|
||
mv -fT -- "$storage_temporary" "$INSTALL_DIR/scert-storage"
|
||
}
|
||
|
||
install_web() {
|
||
local staged_web="$transaction_dir/web-new"
|
||
cp -a -- "$source_dir/web" "$staged_web"
|
||
find "$staged_web" -type d -exec chown root:root {} + -exec chmod 0755 {} +
|
||
find "$staged_web" -type f -exec chown root:root {} + -exec chmod 0644 {} +
|
||
mv -T -- "$INSTALL_DIR/web" "$transaction_dir/web-replaced"
|
||
mv -T -- "$staged_web" "$INSTALL_DIR/web"
|
||
}
|
||
|
||
install_service_files() {
|
||
install -o root -g root -m 0644 "$SCRIPT_DIR/systemd/Scert.service" "$SERVICE_DIR/Scert.service"
|
||
install -o root -g root -m 0644 "$SCRIPT_DIR/systemd/Scert-admin.service" "$SERVICE_DIR/Scert-admin.service"
|
||
install -o root -g root -m 0644 "$SCRIPT_DIR/systemd/Scert-storage.socket" "$SERVICE_DIR/Scert-storage.socket"
|
||
install -o root -g root -m 0644 "$SCRIPT_DIR/systemd/Scert-storage.service" "$SERVICE_DIR/Scert-storage.service"
|
||
# 路径已通过 ASCII 白名单验证；追加固定命令的单个参数，不执行用户提供的命令。
|
||
printf '\n[Service]\nExecStart=\nExecStart=/scert/scert-storage --root %s\n' "$certificate_dir" >> "$SERVICE_DIR/Scert-storage.service"
|
||
install -d -o root -g root -m 0755 "$SERVICE_DROP_IN_DIR"
|
||
printf '[Service]\nReadWritePaths=\nReadWritePaths=%s /scert/conf /scert/data /scert/log /scert/backups\n' \
|
||
"$certificate_dir" > "$SERVICE_DROP_IN_DIR/10-certificate-path.conf"
|
||
chmod 0644 "$SERVICE_DROP_IN_DIR/10-certificate-path.conf"
|
||
|
||
install -o root -g root -m 0644 \
|
||
"$SCRIPT_DIR/systemd/Scert服务管理说明.md" \
|
||
"$INSTALL_DIR/docs/Scert-service-management.md"
|
||
install -o root -g root -m 0644 \
|
||
"$SCRIPT_DIR/systemd/Scert-admin服务管理说明.md" \
|
||
"$INSTALL_DIR/docs/Scert-admin-service-management.md"
|
||
}
|
||
|
||
reload_systemd() {
|
||
systemctl daemon-reload
|
||
}
|
||
|
||
print_completion() {
|
||
printf '%s\n' \
|
||
'Scert Linux 文件安装完成。' \
|
||
'' \
|
||
'已安装：' \
|
||
' 核心程序：/scert/scert' \
|
||
' 密码重置程序：/scert/scert-admin' \
|
||
' 配置目录：/scert/conf' \
|
||
' 数据目录：/scert/data' \
|
||
' 日志目录：/scert/log' \
|
||
' 备份目录：/scert/backups' \
|
||
" 证书目录：$certificate_dir" \
|
||
" 安装路径记录：$INSTALL_METADATA_FILE" \
|
||
'' \
|
||
'本次只加载了 systemd unit，没有启动任何服务，也没有设置开机启动。' \
|
||
'首次初始化会读取安装路径记录，并将上述证书目录作为默认值。' \
|
||
'请先完成初始化配置。Scert-admin 需要密码重置时，管理员仅使用：' \
|
||
' systemctl start Scert-admin' \
|
||
' systemctl stop Scert-admin' \
|
||
'' \
|
||
'Scert 主服务是否启用和启动，应在初始化配置及证书部署完成后按运维流程执行。' \
|
||
'本机防火墙和云安全组端口放行由初始化流程处理或提示，不由本安装器创建公网规则。'
|
||
}
|
||
|
||
main() {
|
||
parse_args "$@"
|
||
validate_environment
|
||
validate_artifacts
|
||
ensure_services_stopped
|
||
ensure_service_account
|
||
trap finish_install_transaction EXIT
|
||
trap 'exit 130' INT
|
||
trap 'exit 143' TERM
|
||
begin_install_transaction
|
||
create_directories
|
||
write_install_metadata
|
||
install_binaries
|
||
install_web
|
||
install_service_files
|
||
reload_systemd
|
||
transaction_active=false
|
||
printf '升级前发布文件已保留：%s\n' "$transaction_dir"
|
||
print_completion
|
||
}
|
||
|
||
main "$@"
|