Attachment 871888 Details for Bug 1073906 – InspectVM.java

InspectVM.java

InspectVM.java (text/plain), 3.58 KB, created by Richard W.M. Jones on 2014-03-07 13:08:47 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Richard W.M. Jones

Created: 2014-03-07 13:08:47 UTC

Size: 3.58 KB

patch

obsolete

>// Example showing how to inspect a virtual machine disk.
>
>import java.util.ArrayList;
>import java.util.Collections;
>import java.util.Comparator;
>import java.util.HashMap;
>import java.util.List;
>import java.util.Map;
>import com.redhat.et.libguestfs.*;
>
>public class InspectVM
>{
>    static final Comparator<String> COMPARE_KEYS_LEN =
>        new Comparator<String>() {
>        public int compare (String k1, String k2) {
>            return k1.length() - k2.length();
>        }
>    };
>
>    public static void main (String[] argv)
>    {
>        try {
>            if (argv.length != 1)
>                throw new Error ("usage: InspectVM disk.img");
>
>            String disk = argv[0];
>
>            GuestFS g = new GuestFS ();
>
>            // Attach the disk image read-only to libguestfs.
>            @SuppressWarnings("serial") Map<String, Object> optargs =
>                new HashMap<String, Object>() {
>                {
>                    //put ("format", "raw");
>                    put ("readonly", Boolean.TRUE);
>                }
>            };
>
>            g.add_drive_opts (disk, optargs);
>
>            // Run the libguestfs back-end.
>            g.launch ();
>
>            // Ask libguestfs to inspect for operating systems.
>            String roots[] = g.inspect_os ();
>            if (roots.length == 0)
>                throw new Error ("inspect_vm: no operating systems found");
>
>            for (String root : roots) {
>                System.out.println ("Root device: " + root);
>
>                // Print basic information about the operating system.
>                System.out.println ("  Product name: " +
>                                    g.inspect_get_product_name (root));
>                System.out.println ("  Version:      " +
>                                    g.inspect_get_major_version (root) +
>                                    "." +
>                                    g.inspect_get_minor_version (root));
>                System.out.println ("  Type:         " +
>                                    g.inspect_get_type (root));
>                System.out.println ("  Distro:       " +
>                                    g.inspect_get_distro (root));
>
>                // Mount up the disks, like guestfish -i.
>                //
>                // Sort keys by length, shortest first, so that we end up
>                // mounting the filesystems in the correct order.
>                Map<String,String> mps = g.inspect_get_mountpoints (root);
>                List<String> mps_keys = new ArrayList<String> (mps.keySet ());
>                Collections.sort (mps_keys, COMPARE_KEYS_LEN);
>
>                for (String mp : mps_keys) {
>                    String dev = mps.get (mp);
>                    try {
>                        g.mount_ro (dev, mp);
>                    }
>                    catch (Exception exn) {
>                        System.err.println (exn + " (ignored)");
>                    }
>                }
>
>                // Get list of applications.
>                Application2[] apps = g.inspect_list_applications2 (root);
>                System.out.println ("  Number of apps installed = " +
>                                    apps.length);
>                for (Application2 app : apps) {
>                    System.out.print ("    " + app.app2_name);
>                    System.out.print (" " + app.app2_version);
>                    System.out.println (" " + app.app2_release);
>                }
>
>                // Unmount everything.
>                g.umount_all ();
>            }
>        }
>        catch (Exception exn) {
>            System.err.println (exn);
>            System.exit (1);
>        }
>    }
>}

Actions: View

Attachments on bug 1073906: 871888