+=head2 set-autosync | autosync
+
+ set-autosync true|false
+
+If C<autosync> is true, this enables autosync. Libguestfs will make a
+best effort attempt to run C<sync> when the handle is closed
+(also if the program exits without closing handles).
+
+=head2 set-path | path
+
+ set-path path
+
+Set the path that libguestfs searches for kernel and initrd.img.
+
+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.
+
+=head2 set-verbose | verbose
+
+ set-verbose true|false
+
+If C<verbose> is true, this turns on verbose messages (to C<stderr>).
+
+Verbose messages are disabled unless the environment variable
+C<LIBGUESTFS_DEBUG> is defined and set to C<1>.
+