--- /dev/null
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+int main(int argc, char *argv[])
+{
+ int rc;
+
+ if (argc != 3) {
+ fprintf(stderr, "usage: %s from to\n", argv[0]);
+ exit(1);
+ }
+
+ rc = rename(argv[1], argv[2]);
+ printf("rename returned %d: %s\n", rc, strerror(errno));
+
+ return rc;
+}