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

2 files changed, 40 insertions, 0 deletions

diff --git a/java/com/redhat/et/libguestfs/GuestFS.java b/java/com/redhat/et/libguestfs/GuestFS.java
index 844c3b33..293ee23e 100644
--- a/java/com/redhat/et/libguestfs/GuestFS.java
+++ b/java/com/redhat/et/libguestfs/GuestFS.java
@@ -2382,4 +2382,27 @@ public class GuestFS {
   private native int _fsck (long g, String fstype, String device)
     throws LibGuestFSException;
 
+  /**
+   * write zeroes to the device
+   *
+   * This command writes zeroes over the first few blocks of
+   * "device".
+   * 
+   * How many blocks are zeroed isn't specified (but it's
+   * *not* enough to securely wipe the device). It should be
+   * sufficient to remove any partition tables, filesystem
+   * superblocks and so on.
+   * 
+   * @throws LibGuestFSException
+   */
+  public void zero (String device)
+    throws LibGuestFSException
+  {
+    if (g == 0)
+      throw new LibGuestFSException ("zero: handle is closed");
+    _zero (g, device);
+  }
+  private native void _zero (long g, String device)
+    throws LibGuestFSException;
+
 }
diff --git a/java/com_redhat_et_libguestfs_GuestFS.c b/java/com_redhat_et_libguestfs_GuestFS.c
index 1f5579e2..466ced85 100644
--- a/java/com_redhat_et_libguestfs_GuestFS.c
+++ b/java/com_redhat_et_libguestfs_GuestFS.c
@@ -2420,3 +2420,20 @@ Java_com_redhat_et_libguestfs_GuestFS__1fsck
   return (jint) r;
 }
 
+JNIEXPORT void JNICALL
+Java_com_redhat_et_libguestfs_GuestFS__1zero
+  (JNIEnv *env, jobject obj, jlong jg, jstring jdevice)
+{
+  guestfs_h *g = (guestfs_h *) (long) jg;
+  int r;
+  const char *device;
+
+  device = (*env)->GetStringUTFChars (env, jdevice, NULL);
+  r = guestfs_zero (g, device);
+  (*env)->ReleaseStringUTFChars (env, jdevice, device);
+  if (r == -1) {
+    throw_exception (env, guestfs_last_error (g));
+    return ;
+  }
+}
+