/*
* $Id$
*
* this file is associated with the Linux-PAM filter module.
* it was written by Andrew G. Morgan <morgan@linux.kernel.org>
*
*/
#ifndef PAM_FILTER_H
#define PAM_FILTER_H
#include <sys/file.h>
/*
* this will fail if there is some problem with these file descriptors
* being allocated by the pam_filter Linux-PAM module. The numbers
* here are thought safe, but the filter developer should use the
* macros, as these numbers are subject to change.
*
* The APPXXX_FILENO file descriptors are the STDIN/OUT/ERR_FILENO of the
* application. The filter uses the STDIN/OUT/ERR_FILENO's to converse
* with the user, passes (modified) user input to the application via
* APPIN_FILENO, and receives application output from APPOUT_FILENO/ERR.
*/
#define APPIN_FILENO 3 /* write here to give application input */
#define APPOUT_FILENO 4 /* read here to get application output */
#define APPERR_FILENO 5 /* read here to get application errors */
#define APPTOP_FILE 6 /* used by select */
#endif
