Fix format warning for st_size base type linux vs mac

Also check buffer size

Author: TheOneRing

src/openvfsfuse.cpp

@@ -702,7 +702,12 @@ static int openVFSfuse_getxattr(const char *orig_path, const char *name, char *v
         if (lstat(path.c_str(), &statbuf) == -1) {
             return -errno;
         }
-        return std::snprintf(value, size, "%lld", statbuf.st_size);
+        const auto realSize = std::to_string(statbuf.st_size);
+        if (realSize.size() < size) {
+            std::ranges::copy(realSize, value);
+            return static_cast<int>(realSize.size());
+        }
+        return -ERANGE;
     }
     const auto ret = Xattr::getxattr(path, name, value, size);
     if (ret == -ENODATA && name == OpenVfsConstants::XAttributeNames::Data) {
@@ -711,7 +716,7 @@ static int openVFSfuse_getxattr(const char *orig_path, const char *name, char *v
         static const auto defaultData = OpenVfsAttributes::PlaceHolderAttributes({}).toData();
         if (size > defaultData.size()) {
             errno = 0;
-            std::copy(defaultData.begin(), defaultData.end(), value);
+            std::ranges::copy(defaultData, value);
             openvfsfuse_log(path, "getxattr", 0, "Returning default data for %s: %s", name, value);
             return static_cast<int>(defaultData.size());
         }