added logs

src/config.h

@@ -21,10 +21,37 @@
 
 #if ENABLE_LOGGING
 #include <stdio.h>
+#include <stdarg.h>
+#include <time.h>
 extern FILE *log_fp;
-#define LOG(fmt, ...) do { if (log_fp) { fprintf(log_fp, "[%s] " fmt "\n", __func__, ##__VA_ARGS__); fflush(log_fp); } } while(0)
+
+static inline void openuf_log_emit(FILE *stream, const char *prefix,
+                                   const char *fmt, ...)
+{
+    char ts[32];
+    time_t now = time(NULL);
+    struct tm tm;
+    localtime_r(&now, &tm);
+    strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", &tm);
+
+    fprintf(stream, "[%s]", ts);
+    if (prefix && prefix[0])
+        fprintf(stream, " [%s]", prefix);
+    fputc(' ', stream);
+
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stream, fmt, ap);
+    va_end(ap);
+    fputc('\n', stream);
+    fflush(stream);
+}
+
+#define LOG(fmt, ...) do { if (log_fp) openuf_log_emit(log_fp, __func__, fmt, ##__VA_ARGS__); } while(0)
+#define LOGF(stream, fmt, ...) openuf_log_emit(stream, "openuf", fmt, ##__VA_ARGS__)
 #else
 #define LOG(fmt, ...) do {} while(0)
+#define LOGF(stream, fmt, ...) do { (void)(stream); } while(0)
 #endif
 
 typedef struct {