feat: 添加一键共享所有打印机功能

新增 share_all_printers() 函数和菜单选项6，实现：
- 检查 CUPS 服务状态
- 显示所有打印机当前共享状态
- 执行 cupsctl --share-printers 启用全局共享
- 对每台打印机执行 lpadmin -p <name> -o printer-is-shared=true
- 重启 CUPS 和 Avahi 服务

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

setup_cups.sh

@@ -1526,6 +1526,109 @@ uninstall() {
     echo ""
 }
 
+# 查看当前网络配置状态
+show_network_status() {
+    echo ""
+    echo -e "${YELLOW}═══════════════════════════════════════════════════════════${NC}"
+    echo -e "${YELLOW}                   当前网络配置状态                        ${NC}"
+    echo -e "${YELLOW}═══════════════════════════════════════════════════════════${NC}"
+    echo ""
+
+    local current_ip=$(get_ip)
+    local current_gateway=$(get_gateway)
+    local current_interface=$(get_interface)
+    local current_netmask=$(get_netmask)
+    local current_dns=$(get_dns)
+
+    echo -e "${BLUE}基本信息:${NC}"
+    echo "  网络接口: $current_interface"
+    echo "  IP 地址:  $current_ip"
+    echo "  子网掩码: /$current_netmask"
+    echo "  网关:     $current_gateway"
+    echo "  DNS:      $current_dns"
+    echo ""
+
+    # 检测配置模式
+    local config_mode="未知"
+    local config_detail=""
+
+    # 检查 NetworkManager
+    if systemctl is-active --quiet NetworkManager 2>/dev/null; then
+        local conn_name=$(nmcli -t -f NAME,DEVICE con show --active 2>/dev/null | grep "$current_interface" | cut -d':' -f1)
+        if [ -n "$conn_name" ]; then
+            local method=$(nmcli -g ipv4.method con show "$conn_name" 2>/dev/null)
+            if [ "$method" = "auto" ]; then
+                config_mode="DHCP (自动获取)"
+                config_detail="通过 NetworkManager 管理"
+            elif [ "$method" = "manual" ]; then
+                config_mode="静态 IP (固定)"
+                config_detail="通过 NetworkManager 管理"
+            fi
+        fi
+    # 检查 netplan
+    elif [ -d /etc/netplan ]; then
+        config_detail="通过 netplan 管理"
+        local found_config=false
+        for f in /etc/netplan/*.yaml; do
+            if [ -f "$f" ]; then
+                if grep -q "dhcp4: true\|dhcp4: yes" "$f" 2>/dev/null; then
+                    config_mode="DHCP (自动获取)"
+                    found_config=true
+                    break
+                elif grep -q "dhcp4: false\|dhcp4: no\|addresses:" "$f" 2>/dev/null; then
+                    config_mode="静态 IP (固定)"
+                    found_config=true
+                    break
+                fi
+            fi
+        done
+        if [ "$found_config" = false ]; then
+            config_mode="未检测到配置"
+        fi
+    # 检查传统 interfaces
+    elif [ -f /etc/network/interfaces ]; then
+        config_detail="通过 /etc/network/interfaces 管理"
+        if grep -q "iface $current_interface inet dhcp" /etc/network/interfaces 2>/dev/null; then
+            config_mode="DHCP (自动获取)"
+        elif grep -q "iface $current_interface inet static" /etc/network/interfaces 2>/dev/null; then
+            config_mode="静态 IP (固定)"
+        fi
+    fi
+
+    echo -e "${BLUE}配置模式:${NC}"
+    if [[ "$config_mode" == *"DHCP"* ]]; then
+        echo -e "  状态: ${GREEN}$config_mode${NC}"
+        echo -e "  说明: IP 由路由器自动分配，换网络环境会自动适应"
+    elif [[ "$config_mode" == *"静态"* ]]; then
+        echo -e "  状态: ${YELLOW}$config_mode${NC}"
+        echo -e "  说明: IP 已固定，换网络环境可能无法连接!"
+    else
+        echo -e "  状态: ${RED}$config_mode${NC}"
+    fi
+    echo "  $config_detail"
+    echo ""
+
+    # 显示配置文件内容
+    echo -e "${BLUE}配置文件详情:${NC}"
+    if [ -d /etc/netplan ]; then
+        for f in /etc/netplan/*.yaml; do
+            if [ -f "$f" ]; then
+                echo "  文件: $f"
+                echo "  ─────────────────────────────────"
+                sed 's/^/  /' "$f"
+                echo ""
+            fi
+        done
+    elif [ -f /etc/network/interfaces ]; then
+        echo "  文件: /etc/network/interfaces"
+        echo "  ─────────────────────────────────"
+        grep -A 10 "iface $current_interface" /etc/network/interfaces 2>/dev/null | sed 's/^/  /'
+        echo ""
+    fi
+
+    echo -e "${YELLOW}═══════════════════════════════════════════════════════════${NC}"
+}
+
 # 显示帮助
 show_help() {
     echo "CUPS 打印服务一键配置脚本"
@@ -1538,6 +1641,94 @@ show_help() {
     echo ""
 }
 
+# 一键共享所有打印机
+share_all_printers() {
+    echo ""
+    echo -e "${YELLOW}═══════════════════════════════════════════════════════════${NC}"
+    echo -e "${YELLOW}                 一键共享所有打印机                         ${NC}"
+    echo -e "${YELLOW}══<EFBFBD><EFBFBD><EFBFBD>════════════════════════════════════════════════════════${NC}"
+    echo ""
+
+    # 检查CUPS是否运行
+    if ! systemctl is-active --quiet cups 2>/dev/null; then
+        error "CUPS 服务未运行，请先安装 CUPS"
+        return 1
+    fi
+
+    # 获取所有打印机
+    local printers=$(lpstat -a 2>/dev/null | awk '{print $1}')
+
+    if [ -z "$printers" ]; then
+        warn "未找到任何打印机"
+        echo "请先在 CUPS 管理界面添加打印机"
+        return 1
+    fi
+
+    echo -e "${BLUE}检测到以下打印机:${NC}"
+    echo "$printers" | while read p; do
+        local shared=$(grep -A 20 "<Printer $p>" /etc/cups/printers.conf 2>/dev/null | grep "Shared" | head -1 | awk '{print $2}')
+        if [ "$shared" = "Yes" ]; then
+            echo -e "  - $p ${GREEN}(已共享)${NC}"
+        else
+            echo -e "  - $p ${RED}(未共享)${NC}"
+        fi
+    done
+    echo ""
+
+    read -p "是否将所有打印机设置为共享? [Y/n]: " confirm < /dev/tty
+    confirm=${confirm:-Y}
+
+    if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
+        echo "已取消"
+        return 0
+    fi
+
+    echo ""
+    info "启用全局打印机共享..."
+    cupsctl --share-printers
+
+    info "设置各打印机共享..."
+    echo "$printers" | while read p; do
+        if [ -n "$p" ]; then
+            echo "  启用共享: $p"
+            lpadmin -p "$p" -o printer-is-shared=true
+        fi
+    done
+
+    info "重启 CUPS 服务..."
+    systemctl restart cups
+
+    # 重启 avahi 以更新广播
+    if systemctl is-active --quiet avahi-daemon 2>/dev/null; then
+        systemctl restart avahi-daemon
+    fi
+
+    echo ""
+    success "所有打印机已设置为共享!"
+    echo ""
+
+    # 显示结果
+    echo -e "${BLUE}当前打印机共享状态:${NC}"
+    local all_shared=true
+    for p in $(lpstat -a 2>/dev/null | awk '{print $1}'); do
+        local shared=$(grep -A 20 "<Printer $p>" /etc/cups/printers.conf 2>/dev/null | grep "Shared" | head -1 | awk '{print $2}')
+        if [ "$shared" = "Yes" ]; then
+            echo -e "  - $p ${GREEN}[已共享]${NC}"
+        else
+            echo -e "  - $p ${RED}[未共享]${NC}"
+            all_shared=false
+        fi
+    done
+    echo ""
+
+    if [ "$all_shared" = true ]; then
+        local ip=$(get_ip)
+        echo -e "${GREEN}现在可以从其他设备连接打印机了:${NC}"
+        echo -e "  CUPS 管理界面: http://$ip:631"
+        echo -e "  Windows 添加打印机地址: http://$ip:631/printers/打印机名"
+    fi
+}
+
 # 显示主菜单
 show_menu() {
     clear
@@ -1554,9 +1745,11 @@ show_menu() {
     echo "    2) 卸载 CUPS 打印服务"
     echo "    3) 切换为 DHCP 自动获取 IP"
     echo "    4) 切换为静态 IP（固定当前 IP）"
+    echo "    5) 查看当前网络状态（静态/DHCP）"
+    echo "    6) 一键共享所有打印机"
     echo "    0) 退出"
     echo ""
-    read -p "  请输入选项 [1/2/3/4/0]: " choice < /dev/tty
+    read -p "  请输入选项 [0-6]: " choice < /dev/tty
 
     case "$choice" in
         1)
@@ -1580,6 +1773,19 @@ show_menu() {
             read -p "按 Enter 返回主菜单..." < /dev/tty
             show_menu
             ;;
+        5)
+            show_network_status
+            echo ""
+            read -p "按 Enter 返回主菜单..." < /dev/tty
+            show_menu
+            ;;
+        6)
+            check_root
+            share_all_printers
+            echo ""
+            read -p "按 Enter 返回主菜单..." < /dev/tty
+            show_menu
+            ;;
         0)
             echo "已退出"
             exit 0