[util] Refuse to set file stat on non-regular file

programs/util.h

@@ -246,11 +246,17 @@ UTIL_STATIC void UTIL_waitForNextTick(void)
 #endif
 
 
+UTIL_STATIC int UTIL_isRegularFile(const char* infilename);
+
+
 UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf)
 {
     int res = 0;
     struct utimbuf timebuf;
 
+    if (!UTIL_isRegularFile(filename))
+        return -1;
+
     timebuf.actime = time(NULL);
     timebuf.modtime = statbuf->st_mtime;
     res += utime(filename, &timebuf);  /* set access and modification times */