docs: Clarify error handler example.

[libguestfs.git] / src / guestfs.pod

diff --git a/src/guestfs.pod b/src/guestfs.pod
index 4c5965d..a1831c0 100644 (file)
--- a/src/guestfs.pod
+++ b/src/guestfs.pod
@@ -728,7 +728,7 @@ and we are looking for help to complete this binding.
 =item B<Java>
 
 Full documentation is contained in the Javadoc which is distributed
-with libguestfs.
+with libguestfs.  For examples, see L<guestfs-java(3)>.
 
 =item B<OCaml>
 
@@ -1344,8 +1344,6 @@ been printed to C<stderr> before the program exits.
 For other programs the caller will almost certainly want to install an
 alternate error handler or do error handling in-line like this:
 
- g = guestfs_create ();
- 
  /* This disables the default behaviour of printing errors
     on stderr. */
  guestfs_set_error_handler (g, NULL, NULL);
@@ -1354,9 +1352,12 @@ alternate error handler or do error handling in-line like this:
    /* Examine the error message and print it etc. */
    char *msg = guestfs_last_error (g);
    int errnum = guestfs_last_errno (g);
-   fprintf (stderr, "%s\n", msg);
+   fprintf (stderr, "%s", msg);
+   if (errnum != 0)
+     fprintf (stderr, ": %s", strerror (errnum));
+   fprintf (stderr, "\n");
    /* ... */
-  }
+ }
 
 Out of memory errors are handled differently.  The default action is
 to call L<abort(3)>.  If this is undesirable, then you can set a
@@ -2817,6 +2818,11 @@ about the stable branch policy.
 
 =item *
 
+Check C<make && make check> works on at least Fedora, Debian and
+Ubuntu.
+
+=item *
+
 Finalize RELEASE-NOTES.
 
 =item *
@@ -2961,6 +2967,16 @@ be reached in practice.  See the source code for more information.
 
 =over 4
 
+=item FEBOOTSTRAP_KERNEL
+
+=item FEBOOTSTRAP_MODULES
+
+These two environment variables allow the kernel that libguestfs uses
+in the appliance to be selected.  If C<$FEBOOTSTRAP_KERNEL> is not
+set, then the most recent host kernel is chosen.  For more information
+about kernel selection, see L<febootstrap-supermin-helper(8)>.  This
+feature is only available in febootstrap E<ge> 3.8.
+
 =item LIBGUESTFS_APPEND
 
 Pass additional options to the guest kernel.
@@ -3011,7 +3027,9 @@ enough.
 =head1 SEE ALSO
 
 L<guestfs-examples(3)>,
+L<guestfs-java(3)>,
 L<guestfs-ocaml(3)>,
+L<guestfs-perl(3)>,
 L<guestfs-python(3)>,
 L<guestfs-ruby(3)>,
 L<guestfish(1)>,
@@ -3034,6 +3052,7 @@ L<virt-tar-out(1)>,
 L<virt-win-reg(1)>,
 L<qemu(1)>,
 L<febootstrap(1)>,
+L<febootstrap-supermin-helper(8)>,
 L<hivex(3)>,
 L<http://libguestfs.org/>.