diff --git a/truncate.c b/truncate.c
new file mode 100644
index 0000000..fd1a0db
--- /dev/null
+++ b/truncate.c
@@ -0,0 +1,41 @@
+#include "defs.h"
+
+int
+sys_truncate(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		printpath(tcp, tcp->u_arg[0]);
+		tprintf(", %lu", tcp->u_arg[1]);
+	}
+	return 0;
+}
+
+int
+sys_truncate64(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		printpath(tcp, tcp->u_arg[0]);
+		printllval(tcp, ", %llu", 1);
+	}
+	return 0;
+}
+
+int
+sys_ftruncate(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		printfd(tcp, tcp->u_arg[0]);
+		tprintf(", %lu", tcp->u_arg[1]);
+	}
+	return 0;
+}
+
+int
+sys_ftruncate64(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		printfd(tcp, tcp->u_arg[0]);
+		printllval(tcp, ", %llu", 1);
+	}
+	return 0;
+}