1 files changed, 37 insertions, 0 deletions
diff --git a/logforwarder/src/apps/vespa-otelcol-start/file-watcher.cpp b/logforwarder/src/apps/vespa-otelcol-start/file-watcher.cpp
new file mode 100644
index 00000000000..f56a1d9d169
--- /dev/null
+++ b/logforwarder/src/apps/vespa-otelcol-start/file-watcher.cpp
@@ -0,0 +1,37 @@
+// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include "file-watcher.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+namespace {
+
+time_t lastModTime(const vespalib::string &fn) {
+    if (fn.empty()) return 0;
+    struct stat info;
+    if (stat(fn.c_str(), &info) != 0) return 0;
+    return info.st_mtime;
+}
+
+} // namespace
+
+bool FileWatcher::anyChanged() {
+    bool result = false;
+    for (auto &entry : watchedFiles) {
+        time_t updated = lastModTime(entry.pathName);
+        if (updated != entry.seenModTime) {
+            result = true;
+            entry.seenModTime = updated;
+        }
+    }
+    return result;
+}
+
+void FileWatcher::init(const config::StringVector &pathList) {
+    watchedFiles.clear();
+    for (const auto& path : pathList) {
+        watchedFiles.emplace_back(path, lastModTime(path));
+    }
+}