<dd style="margin-left: 5.0em">The user executing the filter, typically "lp" or "root"; consult the <i>cups-files.conf</i> file for the current setting.
</dl>
<h2 class="title"><a name="CONFORMING_TO">Conforming To</a></h2>
-While the filter interface is compatible with System V interface
-scripts, it will only work with the System V interface script as the
-only filter. Typically the interface script will be provided via the
-<i>lpadmin(8)</i> command using the <i>-i</i> option.
+While the filter interface is compatible with System V interface scripts, CUPS does not support System V interface scripts.
<h2 class="title"><a name="NOTES">Notes</a></h2>
CUPS filters are not meant to be run directly by the user.
Aside from the legacy System V interface issues (<i>argv[0]</i> is the printer name), CUPS filters also expect specific environment variables and file descriptors, and typically run in a user session that (on OS X) has additional restrictions that affect how it runs.