/usr/include/parport.h is in libprinterconf-dev 0.5-12ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* parport.h - autoprobing of parallel port devices (currently linux only) *
* Red Hat Config Library *
* (c) 1999 by Bernhard Rosenkränzer <bero@redhat.com> *
* $Id: parport.h,v 1.1 2001/09/21 20:13:19 ben Exp $ *
***************************************************************************/
#ifndef RHCL_PARPORT_H
#define RHCL_PARPORT_H
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#ifdef __cplusplus
extern "C" {
#endif
/** parport_probe_manufacturer
* Tries to determine the manufacturer of a parallel port device
*
* @param port Number of parallel port
* @return manufacturer or NULL if device is not IEEE-1284 compatible.
*/
char *parport_probe_manufacturer(int port);
/** parport_probe_model
* Tries to determine the model of a parallel port device
*
* @param port Number of parallel port
* @return model or NULL if device is not IEEE-1284 compatible.
*/
char *parport_probe_model(int port);
/** parport_probe_cmdset
* Tries to determine the command set of a parallel port device
*
* @param port Number of parallel port
* @return command set or NULL if device is not IEEE-1284 compatible.
*/
char *parport_probe_cmdset(int port);
/** parport_probe_description
* Tries to determine the description of a parallel port device
*
* @param port Number of parallel port
* @return description or NULL if device is not IEEE-1284 compatible.
*/
char *parport_probe_description(int port);
/** parport_probe_class
* Tries to determine the class of a parallel port device
* (i.e. PRINTER, SCANNER, ...)
*
* @param port Number of parallel port
* @return class or NULL if device is not IEEE-1284 compatible.
*/
char *parport_probe_class(int port);
/** probe_parport
* Return IEEE-1284 information on a parallel port device
* For internal use (parport_probe_*)
*
* @param port Number of parallel port
* @return IEEE-1284 information or NULL if device (or OS) is not IEEE-1284
* compatible.
*/
char *probe_parport(int port);
#ifdef __cplusplus
}
#endif
#endif
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