add interface

LFtid1056/cloudfront/code/log4.cpp

@@ -92,16 +92,35 @@ std::string build_debug_key(const std::string& id, const std::string& level, int
 
 
 // 递归创建目录
-bool create_directory_recursive(const std::string& path) {
-    size_t pos = 0;
+bool create_directory_recursive(const std::string& path)
+{
+    if (path.empty()) return false;
+
     std::string current;
-    while (pos != std::string::npos) {
-        pos = path.find('/', pos + 1);
-        current = path.substr(0, pos);
-        if (!current.empty() && access(current.c_str(), F_OK) != 0) {
-            if (mkdir(current.c_str(), 0755) != 0) {
-                perror(("mkdir failed: " + current).c_str());
-                return false;
+    current.reserve(path.size());
+
+    for (size_t i = 0; i < path.size(); ++i) {
+        current += path[i];
+
+        // 遇到 '/' 或最后一个字符时创建
+        if (path[i] == '/' || i == path.size() - 1) {
+            if (current.empty()) continue;
+
+            // 去掉末尾 '/'
+            std::string dir = current;
+            if (dir.back() == '/' && dir.size() > 1) {
+                dir.pop_back();
+            }
+
+            struct stat st;
+            if (stat(dir.c_str(), &st) != 0) {
+                if (mkdir(dir.c_str(), 0755) != 0) {
+                    // 如果已经存在（并发场景），忽略
+                    if (errno != EEXIST) {
+                        perror(("mkdir failed: " + dir).c_str());
+                        return false;
+                    }
+                }
             }
         }
     }