availability: Add optional groups and implement guestfs_available call.

[libguestfs.git] / daemon / zerofree.c

diff --git a/daemon/zerofree.c b/daemon/zerofree.c
index 27ef692..05a547b 100644 (file)
--- a/daemon/zerofree.c
+++ b/daemon/zerofree.c
@@ -26,15 +26,21 @@
 
 #include "daemon.h"
 #include "actions.h"
+#include "optgroups.h"
 
 int
-do_zerofree (char *device)
+optgroup_zerofree_available (void)
+{
+  int r = access ("/usr/sbin/zerofree", X_OK);
+  return r == 0;
+}
+
+int
+do_zerofree (const char *device)
 {
   char *err;
   int r;
 
-  RESOLVE_DEVICE (device, return -1);
-
   r = command (NULL, &err, "/usr/sbin/zerofree", device, NULL);
   if (r == -1) {
     reply_with_error ("zerofree: %s: %s", device, err);