fix: 修复JSON导入、备份目录创建和内存安全等问题

修复JSON导入时转义字符处理不完整的问题，添加对\b、\f等控制字符的转义
改进备份目录创建逻辑，使用SHCreateDirectoryExW递归创建目录
修复内存分配失败处理，避免空指针解引用
修正选项卡标题设置位置，从Dialog改为Tabs控件
增强导入功能，支持TXT文件导入时选择目标变量类型
优化清理无效路径算法，使用标记数组减少内存移动
修复宽字符环境变量设置，使用_wputenv_s替代putenv
添加导入数据初始化，防止未初始化内存访问
改进文件属性检查，使用宽字符API支持Unicode路径

include/core/import_export.h

@@ -6,6 +6,9 @@
 
 #define EXPORT_VERSION "1.0"
 
+// 导出数据结构
+// 注意：此结构体用于导出时是只读的，items 指针指向外部 StringList 的数据
+// 不要对 ExportData 调用 clear_string_list，会破坏原始数据
 typedef struct {
     StringList system;
     StringList user;

src/controller/callbacks_io.c

@@ -42,6 +42,8 @@ int btn_import_cb(Ihandle *self)
         if (filepath)
         {
             ExportData imported;
+            init_string_list(&imported.system);
+            init_string_list(&imported.user);
             ErrorCode import_result = import_paths_from_file(filepath, &imported);
             if (import_result == ERR_OK)
             {
@@ -51,6 +53,8 @@ int btn_import_cb(Ihandle *self)
                 if (!has_system && !has_user)
                 {
                     IupMessage("错误", "文件中没有找到有效的路径！");
+                    clear_string_list(&imported.system);
+                    clear_string_list(&imported.user);
                     IupDestroy(filedlg);
                     return IUP_DEFAULT;
                 }
@@ -63,7 +67,10 @@ int btn_import_cb(Ihandle *self)
                 }
                 else if (has_system)
                 {
-                    choice = 3;
+                    // TXT 文件导入时，让用户选择目标（系统变量或用户变量）
+                    choice = IupAlarm("导入选项", "请选择导入目标：",
+                                      "导入到系统变量", "导入到用户变量", NULL);
+                    // IupAlarm 返回 1 或 2，转换为 1(系统) 或 2(用户)
                 }
                 else
                 {
@@ -96,6 +103,10 @@ int btn_import_cb(Ihandle *self)
                     total_imported += imported.user.count;
                 }
 
+                // 释放导入数据
+                clear_string_list(&imported.system);
+                clear_string_list(&imported.user);
+
                 char msg[256];
                 snprintf(msg, sizeof(msg), "成功导入 %d 个路径！", total_imported);
                 IupMessage("导入成功", msg);

src/controller/callbacks_search.c

@@ -3,6 +3,7 @@
 #include "core/app_context.h"
 #include "core/lua_config.h"
 #include "utils/string_ext.h"
+#include "utils/safe_string.h"
 #include "utils/ui_constants.h"
 #include "ui/ui_utils.h"
 #include <string.h>
@@ -55,7 +56,9 @@ int list_dropfiles_cb(Ihandle *self, const char *filename, int num, int x, int y
     else
         return IUP_DEFAULT;
 
-    DWORD attr = GetFileAttributesA(filename);
+    wchar_t *wfilename = utf8_to_wide(filename);
+    DWORD attr = wfilename ? GetFileAttributesW(wfilename) : INVALID_FILE_ATTRIBUTES;
+    free(wfilename);
     if (attr != INVALID_FILE_ATTRIBUTES && (attr & FILE_ATTRIBUTE_DIRECTORY))
     {
         Ihandle *txt_search = IupGetDialogChild(dlg, CTRL_TXT_SEARCH);

src/controller/callbacks_sys.c

@@ -28,7 +28,15 @@ int btn_ok_cb(Ihandle *self)
         return IUP_DEFAULT;
     }
 
-    backup_registry();
+    ErrorCode backup_result = backup_registry();
+    if (backup_result != ERR_OK)
+    {
+        log_error("Backup failed: error code %d", backup_result);
+        int choice = IupAlarm("警告", "备份失败！是否继续保存？\n（继续保存可能导致无法恢复）",
+                              "继续保存", "取消", NULL);
+        if (choice != 1)
+            return IUP_DEFAULT;
+    }
 
     ErrorCode sys_ok = save_system_paths(&ctx->sys_paths);
     ErrorCode user_ok = save_user_paths(&ctx->user_paths);

src/core/import_export.c

@@ -11,25 +11,28 @@
 static void get_current_datetime(char *buffer, int size)
 {
     time_t now = time(NULL);
-    struct tm *tm_info = localtime(&now);
-    strftime(buffer, size, "%Y-%m-%d %H:%M:%S", tm_info);
+    struct tm tm_info;
+    localtime_s(&tm_info, &now);
+    strftime(buffer, size, "%Y-%m-%d %H:%M:%S", &tm_info);
 }
 
-// 转义 JSON 字符串中的特殊字符
+// 转义 JSON 字符串中的特殊字符（符合 RFC 8259 规范）
 static char *escape_json_string(const char *str)
 {
     if (!str)
         return NULL;
 
     int len = strlen(str);
-    char *result = (char *)malloc(len * 2 + 1);
+    // 最坏情况：每个字符都需要 \uXXXX 转义（6字节）
+    char *result = (char *)malloc(len * 6 + 1);
     if (!result)
         return NULL;
 
     char *p = result;
     for (int i = 0; i < len; i++)
     {
-        switch (str[i])
+        unsigned char c = (unsigned char)str[i];
+        switch (c)
         {
         case '\\':
             *p++ = '\\';
@@ -51,8 +54,24 @@ static char *escape_json_string(const char *str)
             *p++ = '\\';
             *p++ = 't';
             break;
+        case '\b':
+            *p++ = '\\';
+            *p++ = 'b';
+            break;
+        case '\f':
+            *p++ = '\\';
+            *p++ = 'f';
+            break;
         default:
-            *p++ = str[i];
+            if (c < 0x20) // 其他控制字符 (0x00-0x1F)
+            {
+                sprintf(p, "\\u%04x", c);
+                p += 6;
+            }
+            else
+            {
+                *p++ = str[i];
+            }
             break;
         }
     }
@@ -124,6 +143,9 @@ ErrorCode export_paths_to_file(const ExportData *data, const char *filepath)
 // 移除字符串首尾的空格、制表符、换行符和回车符
 static void trim_whitespace(char *str)
 {
+    if (!str || *str == '\0')
+        return;
+
     char *start = str;
     while (*start == ' ' || *start == '\t')
         start++;
@@ -152,7 +174,20 @@ static int is_comment_or_empty(const char *line)
 static int is_json_file(const char *filepath)
 {
     const char *ext = strrchr(filepath, '.');
-    return ext && strcasecmp(ext, ".json") == 0;
+    return ext && _stricmp(ext, ".json") == 0;
+}
+
+// 检查引号前是否有奇数个连续反斜杠（奇数个表示引号被转义）
+static int is_quote_escaped(const char *quote_pos, const char *line_start)
+{
+    int backslash_count = 0;
+    const char *p = quote_pos - 1;
+    while (p >= line_start && *p == '\\')
+    {
+        backslash_count++;
+        p--;
+    }
+    return (backslash_count % 2) == 1; // 奇数个反斜杠表示转义
 }
 
 // 从文件导入 PATH
@@ -204,102 +239,97 @@ ErrorCode import_paths_from_file(const char *filepath, ExportData *data)
     int in_user = 0;
     int depth = 0;
     int in_string = 0;
-    char path_buffer[4096];
-    int path_len = 0;
+    char key_buffer[256] = {0};
+    int key_len = 0;
 
     while (fgets(buffer, sizeof(buffer), fp))
     {
         char *p = buffer;
         while (*p)
         {
-            if (*p == '"' && (p == buffer || *(p - 1) != '\\'))
+            // 处理字符串开始/结束
+            if (*p == '"')
             {
-                in_string = !in_string;
-            }
-            else if (in_string && *p == '\\')
-            {
-                p++;
-                if (*p)
+                if (!in_string)
                 {
-                    if (*p == 'n')
-                        *p = '\n';
-                    else if (*p == 'r')
-                        *p = '\r';
-                    else if (*p == 't')
-                        *p = '\t';
+                    // 字符串开始
+                    in_string = 1;
+                    key_len = 0; // 开始收集键名或字符串内容
+                }
+                else if (!is_quote_escaped(p, buffer))
+                {
+                    // 字符串结束（未转义的引号）
+                    in_string = 0;
+
+                    // 在 depth 1 时，检查刚结束的字符串是否是键名
+                    if (depth == 1)
+                    {
+                        key_buffer[key_len] = '\0';
+                        if (strcmp(key_buffer, "system") == 0)
+                        {
+                            in_system = 1;
+                            in_user = 0;
+                        }
+                        else if (strcmp(key_buffer, "user") == 0)
+                        {
+                            in_user = 1;
+                            in_system = 0;
+                        }
+                    }
+                    // 在 depth 2 时，如果在 system/user 数组内，提取路径
+                    else if (depth == 2 && (in_system || in_user))
+                    {
+                        key_buffer[key_len] = '\0';
+                        if (key_len > 0)
+                        {
+                            StringList *target = in_system ? &data->system : &data->user;
+                            add_string_list(target, key_buffer);
+                        }
+                    }
+                }
+                else
+                {
+                    // 转义的引号，作为内容的一部分
+                    if (key_len < (int)sizeof(key_buffer) - 1)
+                        key_buffer[key_len++] = *p;
                 }
             }
-            else if (!in_string)
+            else if (in_string)
             {
+                // 在字符串内，收集内容
+                if (*p == '\\' && *(p + 1))
+                {
+                    // 处理转义序列
+                    p++;
+                    char ch;
+                    switch (*p)
+                    {
+                    case 'n':  ch = '\n'; break;
+                    case 'r':  ch = '\r'; break;
+                    case 't':  ch = '\t'; break;
+                    case 'b':  ch = '\b'; break;
+                    case 'f':  ch = '\f'; break;
+                    case '\\': ch = '\\'; break;
+                    case '"':  ch = '"';  break;
+                    case '/':  ch = '/';  break;
+                    default:   ch = *p;   break;
+                    }
+                    if (key_len < (int)sizeof(key_buffer) - 1)
+                        key_buffer[key_len++] = ch;
+                }
+                else
+                {
+                    if (key_len < (int)sizeof(key_buffer) - 1)
+                        key_buffer[key_len++] = *p;
+                }
+            }
+            else
+            {
+                // 不在字符串内
                 if (*p == '{' || *p == '[')
                     depth++;
                 else if (*p == '}' || *p == ']')
                     depth--;
-                else if (depth == 1 && *p == '"')
-                {
-                    if (strncmp(p, "\"system\"", 8) == 0)
-                    {
-                        in_system = 1;
-                        in_user = 0;
-                    }
-                    else if (strncmp(p, "\"user\"", 6) == 0)
-                    {
-                        in_user = 1;
-                        in_system = 0;
-                    }
-                }
-                else if (in_system && depth == 2 && *p == '"')
-                {
-                    path_len = 0;
-                    p++;
-                    while (*p && path_len < (int)sizeof(path_buffer) - 1)
-                    {
-                        if (*p == '"' && *(p - 1) != '\\')
-                            break;
-                        if (*p == '\\' && *(p + 1))
-                        {
-                            p++;
-                            if (*p == 'n')
-                                *p = '\n';
-                            else if (*p == 'r')
-                                *p = '\r';
-                            else if (*p == 't')
-                                *p = '\t';
-                        }
-                        path_buffer[path_len++] = *p++;
-                    }
-                    if (path_len > 0)
-                    {
-                        path_buffer[path_len] = '\0';
-                        add_string_list(&data->system, path_buffer);
-                    }
-                }
-                else if (in_user && depth == 2 && *p == '"')
-                {
-                    path_len = 0;
-                    p++;
-                    while (*p && path_len < (int)sizeof(path_buffer) - 1)
-                    {
-                        if (*p == '"' && *(p - 1) != '\\')
-                            break;
-                        if (*p == '\\' && *(p + 1))
-                        {
-                            p++;
-                            if (*p == 'n')
-                                *p = '\n';
-                            else if (*p == 'r')
-                                *p = '\r';
-                            else if (*p == 't')
-                                *p = '\t';
-                        }
-                        path_buffer[path_len++] = *p++;
-                    }
-                    if (path_len > 0)
-                    {
-                        path_buffer[path_len] = '\0';
-                        add_string_list(&data->user, path_buffer);
-                    }
-                }
             }
             p++;
         }

src/core/path_manager.c

@@ -52,44 +52,68 @@ ErrorCode path_manager_move_down(StringList *list, int index)
 }
 
 // 清理无效路径项
+// 算法：先标记需要删除的项，然后从后向前批量删除，减少内存移动
 ErrorCode path_manager_clean(StringList *list)
 {
     if (!list) return ERR_NULL_PTR;
-    
+    if (list->count == 0) return ERR_OK;
+
+    // 分配标记数组
+    char *marks = (char *)calloc(list->count, sizeof(char));
+    if (!marks) return ERR_OUT_OF_MEMORY;
+
     int removed_count = 0;
 
+    // 第一遍：标记无效路径和重复路径
     for (int i = list->count - 1; i >= 0; i--)
     {
         char *item = list->items[i];
-        if (!item) continue;
-
-        int should_remove = 0;
+        if (!item)
+        {
+            marks[i] = 1;
+            removed_count++;
+            continue;
+        }
 
+        // 检查路径有效性
         if (!is_path_valid(item))
         {
-            should_remove = 1;
-        }
-        else
-        {
-            for (int j = 0; j < i; j++)
-            {
-                char *prev_item = list->items[j];
-                if (prev_item && _stricmp(item, prev_item) == 0)
-                {
-                    should_remove = 1;
-                    break;
-                }
-            }
+            marks[i] = 1;
+            removed_count++;
+            continue;
         }
 
-        if (should_remove)
+        // 检查是否与前面的项重复（只检查未被标记的项）
+        for (int j = 0; j < i; j++)
         {
-            path_manager_remove_at(list, i);
-            removed_count++;
+            if (!marks[j] && list->items[j] && _stricmp(item, list->items[j]) == 0)
+            {
+                marks[i] = 1;
+                removed_count++;
+                break;
+            }
         }
     }
-    
-    log_info("Cleaned paths: removed %d invalid/duplicate paths, remaining %d", 
+
+    // 第二遍：从后向前删除标记的项，避免多次内存移动
+    for (int i = list->count - 1; i >= 0; i--)
+    {
+        if (marks[i])
+        {
+            free(list->items[i]);
+            // 移动后续元素
+            for (int j = i; j < list->count - 1; j++)
+            {
+                list->items[j] = list->items[j + 1];
+            }
+            list->items[list->count - 1] = NULL;
+            list->count--;
+        }
+    }
+
+    free(marks);
+
+    log_info("Cleaned paths: removed %d invalid/duplicate paths, remaining %d",
             removed_count, list->count);
     return ERR_OK;
 }

src/core/registry_service.c

@@ -26,38 +26,40 @@ static ErrorCode load_single_path(HKEY hKeyRoot, const wchar_t *regPath, StringL
     if (res == ERROR_SUCCESS)
     {
         wchar_t *buffer = (wchar_t *)malloc(size + 2);
-        if (buffer)
+        if (!buffer)
         {
-            memset(buffer, 0, size + 2);
-            if (RegQueryValueExW(hKey, REG_VALUE, NULL, &type, (LPBYTE)buffer, &size) == ERROR_SUCCESS)
-            {
-                wchar_t *current = buffer;
-                wchar_t *next_semicolon = NULL;
-
-                while (*current)
-                {
-                    next_semicolon = wcschr(current, L';');
-                    if (next_semicolon)
-                        *next_semicolon = L'\0';
-
-                    if (wcslen(current) > 0)
-                    {
-                        char *utf8_str = wide_to_utf8(current);
-                        if (utf8_str)
-                        {
-                            add_string_list(list, utf8_str);
-                            free(utf8_str);
-                        }
-                    }
-
-                    if (next_semicolon)
-                        current = next_semicolon + 1;
-                    else
-                        break;
-                }
-            }
-            free(buffer);
+            RegCloseKey(hKey);
+            return ERR_OUT_OF_MEMORY;
         }
+        memset(buffer, 0, size + 2);
+        if (RegQueryValueExW(hKey, REG_VALUE, NULL, &type, (LPBYTE)buffer, &size) == ERROR_SUCCESS)
+        {
+            wchar_t *current = buffer;
+            wchar_t *next_semicolon = NULL;
+
+            while (*current)
+            {
+                next_semicolon = wcschr(current, L';');
+                if (next_semicolon)
+                    *next_semicolon = L'\0';
+
+                if (wcslen(current) > 0)
+                {
+                    char *utf8_str = wide_to_utf8(current);
+                    if (utf8_str)
+                    {
+                        add_string_list(list, utf8_str);
+                        free(utf8_str);
+                    }
+                }
+
+                if (next_semicolon)
+                    current = next_semicolon + 1;
+                else
+                    break;
+            }
+        }
+        free(buffer);
     }
     RegCloseKey(hKey);
     return ERR_OK;

src/main.c

@@ -50,7 +50,7 @@ int main(int argc, char **argv)
     log_info("PathEditor starting...");
 
     // 强制设置 UTF8MODE 环境变量，必须在 IupOpen 之前
-    putenv("IUP_UTF8MODE=YES");
+    _wputenv_s(L"IUP_UTF8MODE", L"YES");
 
     IupOpen(&argc, &argv);
     IupSetGlobal("UTF8MODE", "YES");
@@ -105,12 +105,16 @@ int main(int argc, char **argv)
     // 检查管理员权限
     if (!check_admin())
     {
-        IupMessage(_("Warning"), _(lua_config_get_string("status", "admin_warning")));
+        const char *admin_msg = lua_config_get_string("status", "admin_warning");
+        IupMessage(_("Warning"), admin_msg ? _(admin_msg) : "需要管理员权限才能编辑环境变量");
 
         // 设置只读状态提示
         Ihandle *lbl_status = IupGetDialogChild(dlg, CTRL_LBL_STATUS);
         if (lbl_status)
-            IupSetAttribute(lbl_status, "TITLE", _(lua_config_get_string("status", "readonly")));
+        {
+            const char *readonly_msg = lua_config_get_string("status", "readonly");
+            IupSetAttribute(lbl_status, "TITLE", readonly_msg ? _(readonly_msg) : "只读模式");
+        }
 
         // 禁用所有需要管理员权限的按钮
         for (int i = 0; i < ADMIN_DISABLE_COUNT; i++)

src/ui/main_window.c

@@ -180,9 +180,13 @@ void refresh_main_window_ui(Ihandle *main_dlg)
     // 设置窗口标题
     IupSetAttribute(main_dlg, "TITLE", _(lua_config_get_string("app", "name")));
 
-    // 设置选项卡标题
-    IupSetAttribute(main_dlg, "TABTITLE0", _(lua_config_get_string("label", "tab_sys")));
-    IupSetAttribute(main_dlg, "TABTITLE1", _(lua_config_get_string("label", "tab_user")));
+    // 设置选项卡标题（需要设置在 Tabs 控件上，而非 Dialog）
+    Ihandle *tabs = IupGetDialogChild(main_dlg, CTRL_TABS_MAIN);
+    if (tabs)
+    {
+        IupSetAttribute(tabs, "TABTITLE0", _(lua_config_get_string("label", "tab_sys")));
+        IupSetAttribute(tabs, "TABTITLE1", _(lua_config_get_string("label", "tab_user")));
+    }
 
     // 辅助函数：设置子控件标题
     #define SET_CHILD_TITLE(btn_name, text_key) \

src/utils/os_env.c

@@ -56,16 +56,17 @@ ErrorCode backup_registry(void)
         return ERR_FAILED;
     }
 
-    // 创建备份目录
+    // 创建备份目录（递归创建中间目录）
     wchar_t backup_dir[MAX_PATH];
     swprintf(backup_dir, MAX_PATH, L"%s\\PathEditor\\backups", appdata_path);
-    CreateDirectoryW(backup_dir, NULL);
+    SHCreateDirectoryExW(NULL, backup_dir, NULL);
 
     // 生成时间戳
     time_t t = time(NULL);
-    struct tm *tm_info = localtime(&t);
+    struct tm tm_info;
+    localtime_s(&tm_info, &t);
     wchar_t timestamp[64];
-    wcsftime(timestamp, sizeof(timestamp), L"%Y%m%d_%H%M%S", tm_info);
+    wcsftime(timestamp, sizeof(timestamp) / sizeof(timestamp[0]), L"%Y%m%d_%H%M%S", &tm_info);
 
     // 构造备份文件名
     wchar_t backup_file[MAX_PATH];

src/utils/string_ext.c

@@ -78,10 +78,17 @@ void add_string_list(StringList *list, const char *str)
         return;
     if (list->count >= list->capacity)
     {
-        list->capacity = (list->capacity == 0) ? 16 : list->capacity * 2;
-        list->items = (char **)realloc(list->items, list->capacity * sizeof(char *));
+        int new_capacity = (list->capacity == 0) ? 16 : list->capacity * 2;
+        char **new_items = (char **)realloc(list->items, new_capacity * sizeof(char *));
+        if (!new_items)
+            return; // realloc 失败，保留原数据
+        list->items = new_items;
+        list->capacity = new_capacity;
     }
-    list->items[list->count] = _strdup(str); // 复制字符串
+    char *dup = _strdup(str);
+    if (!dup)
+        return; // _strdup 失败，不递增 count
+    list->items[list->count] = dup;
     list->count++;
 }
 
@@ -98,8 +105,11 @@ int string_list_set(StringList *list, int index, const char *str)
 {
     if (!list || index < 0 || index >= list->count || !str)
         return -1;
+    char *dup = _strdup(str);
+    if (!dup)
+        return -1; // _strdup 失败，保留旧数据
     free(list->items[index]);
-    list->items[index] = _strdup(str);
+    list->items[index] = dup;
     return 0;
 }