Add src rules for variadic functions

Author: lucic71

rules/fcntl/src.cpp

@@ -0,0 +1,14 @@
+// Copyright (c) 2022-present INESC-ID.
+// Distributed under the MIT license that can be found in the LICENSE file.
+
+#include <fcntl.h>
+
+template <typename... Args>
+int f1(int a0, int a1, Args... args) {
+  return fcntl(a0, a1, args...);
+}
+
+template <typename... Args>
+int f2(const char *a0, int a1, Args... args) {
+  return open(a0, a1, args...);
+}

rules/ioctl/src.cpp

@@ -0,0 +1,9 @@
+// Copyright (c) 2022-present INESC-ID.
+// Distributed under the MIT license that can be found in the LICENSE file.
+
+#include <sys/ioctl.h>
+
+template <typename... Args>
+int f1(int a0, unsigned long a1, Args... args) {
+  return ioctl(a0, a1, args...);
+}

rules/stdio/src.cpp

@@ -56,3 +56,8 @@ int f19(FILE *stream, off_t offset, int whence) {
 }
 
 FILE *f20(int fd, const char *mode) { return fdopen(fd, mode); }
+
+template <typename... Args>
+int f21(char *a0, size_t a1, const char *a2, Args... args) {
+  return snprintf(a0, a1, a2, args...);
+}