Added 'zero' command to wipe partition tables and superblocks.

3 files changed, 27 insertions, 0 deletions

diff --git a/ocaml/guestfs.ml b/ocaml/guestfs.ml
index 32e2264e..0d60bccf 100644
--- a/ocaml/guestfs.ml
+++ b/ocaml/guestfs.ml
@@ -220,3 +220,4 @@ external get_e2label : t -> string -> string = "ocaml_guestfs_get_e2label"
 external set_e2uuid : t -> string -> string -> unit = "ocaml_guestfs_set_e2uuid"
 external get_e2uuid : t -> string -> string = "ocaml_guestfs_get_e2uuid"
 external fsck : t -> string -> string -> int = "ocaml_guestfs_fsck"
+external zero : t -> string -> unit = "ocaml_guestfs_zero"
diff --git a/ocaml/guestfs.mli b/ocaml/guestfs.mli
index 2cbd7346..259c8f34 100644
--- a/ocaml/guestfs.mli
+++ b/ocaml/guestfs.mli
@@ -439,3 +439,6 @@ val get_e2uuid : t -> string -> string
 val fsck : t -> string -> string -> int
 (** run the filesystem checker *)
 
+val zero : t -> string -> unit
+(** write zeroes to the device *)
+
diff --git a/ocaml/guestfs_c_actions.c b/ocaml/guestfs_c_actions.c
index 22dc18f9..458d7a70 100644
--- a/ocaml/guestfs_c_actions.c
+++ b/ocaml/guestfs_c_actions.c
@@ -2823,3 +2823,26 @@ ocaml_guestfs_fsck (value gv, value fstypev, value devicev)
   CAMLreturn (rv);
 }
 
+CAMLprim value
+ocaml_guestfs_zero (value gv, value devicev)
+{
+  CAMLparam2 (gv, devicev);
+  CAMLlocal1 (rv);
+
+  guestfs_h *g = Guestfs_val (gv);
+  if (g == NULL)
+    caml_failwith ("zero: used handle after closing it");
+
+  const char *device = String_val (devicev);
+  int r;
+
+  caml_enter_blocking_section ();
+  r = guestfs_zero (g, device);
+  caml_leave_blocking_section ();
+  if (r == -1)
+    ocaml_guestfs_raise_error (g, "zero");
+
+  rv = Val_unit;
+  CAMLreturn (rv);
+}
+