Add refcount_read to util.inc

Add refcount_read so other code can easily find out how many things have the file system mounted.

1 files changed, 13 insertions, 0 deletions

diff --git a/etc/inc/util.inc b/etc/inc/util.inc
index 94e8553..9961b4b 100644
--- a/etc/inc/util.inc
+++ b/etc/inc/util.inc
@@ -248,6 +248,19 @@ function refcount_unreference($reference) {
 	return $shm_data;
 }
 
+function refcount_read($reference) {
+	/* This function just reads the current value of the refcount for information. */
+	/* There is no need for locking. */
+	$shmid = @shmop_open($reference, "a", 0, 0);
+	if (!$shmid) {
+		log_error(gettext("Could not open shared memory for read {$reference}"));
+		return -1;
+	}
+	$shm_data = @shmop_read($shmid, 0, 10);
+	@shmop_close($shmid);
+	return $shm_data;
+}
+
 function is_module_loaded($module_name) {
 	$running = `/sbin/kldstat | grep {$module_name} | /usr/bin/grep -v grep | /usr/bin/wc -l`;
 	if (intval($running) >= 1)