Subsequent elements are parameters. The list must be
non-empty (ie. must contain a program name).
+The return value is anything printed to I<stdout> by
+the command.
+
+If the command returns a non-zero exit status, then
+this function returns an error message. The error message
+string is the content of I<stderr> from the command.
+
The C<$PATH> environment variable will contain at least
C</usr/bin> and C</bin>. If you require a program from
another location, you should provide the full path in the
This function returns a string, or NULL on error.
I<The caller must free the returned string after use>.
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
=head2 guestfs_command_lines
char **guestfs_command_lines (guestfs_h *handle,
(like L<environ(3)>), or NULL if there was an error.
I<The caller must free the strings and the array after use>.
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
=head2 guestfs_config
int guestfs_config (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_end_busy
+
+ int guestfs_end_busy (guestfs_h *handle);
+
+This sets the state to C<READY>, or if in C<CONFIG> then it leaves the
+state as is. This is only used when implementing
+actions using the low-level API.
+
+For more information on states, see L<guestfs(3)>.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_equal
int guestfs_equal (guestfs_h *handle,
On error this function returns -1.
+=head2 guestfs_get_append
+
+ const char *guestfs_get_append (guestfs_h *handle);
+
+Return the additional kernel options which are added to the
+guest kernel command line.
+
+If C<NULL> then no options are added.
+
+This function returns a string, or NULL on error.
+The string is owned by the guest handle and must I<not> be freed.
+
=head2 guestfs_get_autosync
int guestfs_get_autosync (guestfs_h *handle);
This function returns 0 on success or -1 on error.
+=head2 guestfs_set_append
+
+ int guestfs_set_append (guestfs_h *handle,
+ const char *append);
+
+This function is used to add additional options to the
+guest kernel command line.
+
+The default is C<NULL> unless overridden by setting
+C<LIBGUESTFS_APPEND> environment variable.
+
+Setting C<append> to C<NULL> means I<no> additional options
+are passed (libguestfs always adds a few of its own).
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_set_autosync
int guestfs_set_autosync (guestfs_h *handle,
The default is C<$libdir/guestfs> unless overridden by setting
C<LIBGUESTFS_PATH> environment variable.
-The string C<path> is stashed in the libguestfs handle, so the caller
-must make sure it remains valid for the lifetime of the handle.
-
Setting C<path> to C<NULL> restores the default path.
This function returns 0 on success or -1 on error.
You can also override this by setting the C<LIBGUESTFS_QEMU>
environment variable.
-The string C<qemu> is stashed in the libguestfs handle, so the caller
-must make sure it remains valid for the lifetime of the handle.
-
Setting C<qemu> to C<NULL> restores the default qemu binary.
This function returns 0 on success or -1 on error.