Useful for printing error messages about use of file handles. */
const char *
-fh_handle_name (struct file_handle *h)
+fh_handle_name (const struct file_handle *h)
{
static char *buf = NULL;
/* Hashes the name of file handle H. */
static unsigned
-hash_file_handle (const void *handle_, void *param unused)
+hash_file_handle (const void *handle_, void *param UNUSED)
{
const struct file_handle *handle = handle_;
/* Compares names of file handles A and B. */
static int
-cmp_file_handle (const void *a_, const void *b_, void *foo unused)
+cmp_file_handle (const void *a_, const void *b_, void *foo UNUSED)
{
const struct file_handle *a = a_;
const struct file_handle *b = b_;