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glibc/hurd/hurd/ioctl.h
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/* User-registered handlers for specific `ioctl' requests. | |
Copyright (C) 1993-2013 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#ifndef _HURD_IOCTL_H | |
#define _HURD_IOCTL_H 1 | |
#define __need___va_list | |
#include <stdarg.h> | |
#include <bits/ioctls.h> | |
/* Type of handler function, called like ioctl to do its entire job. */ | |
typedef int (*ioctl_handler_t) (int fd, int request, void *arg); | |
/* Structure that records an ioctl handler. */ | |
struct ioctl_handler | |
{ | |
/* Range of handled _IOC_NOTYPE (REQUEST) values. */ | |
int first_request, last_request; | |
/* Handler function, called like ioctl to do its entire job. */ | |
ioctl_handler_t handler; | |
struct ioctl_handler *next; /* Next handler. */ | |
}; | |
/* Register HANDLER to handle ioctls with REQUEST values between | |
FIRST_REQUEST and LAST_REQUEST inclusive. Returns zero if successful. | |
Return nonzero and sets `errno' for an error. */ | |
extern int hurd_register_ioctl_handler (int first_request, int last_request, | |
ioctl_handler_t handler); | |
/* Define a library-internal handler for ioctl commands between FIRST and | |
LAST inclusive. The last element gratuitously references HANDLER to | |
avoid `defined but not used' warnings. */ | |
#define _HURD_HANDLE_IOCTLS_1(handler, first, last, moniker) \ | |
static const struct ioctl_handler handler##_ioctl_handler##moniker \ | |
__attribute__ ((__unused__)) = \ | |
{ _IOC_NOTYPE (first), _IOC_NOTYPE (last), \ | |
(ioctl_handler_t) (handler), NULL }; \ | |
text_set_element (_hurd_ioctl_handler_lists, \ | |
handler##_ioctl_handler##moniker) | |
#define _HURD_HANDLE_IOCTLS(handler, first, last) \ | |
_HURD_HANDLE_IOCTLS_1 (handler, first, last, first##_to_##last) | |
/* Define a library-internal handler for a single ioctl command. */ | |
#define _HURD_HANDLE_IOCTL(handler, ioctl) \ | |
_HURD_HANDLE_IOCTLS_1 (handler, ioctl, ioctl, ioctl##_only) | |
/* Lookup the handler for the given ioctl request. */ | |
ioctl_handler_t _hurd_lookup_ioctl_handler (int request); | |
#endif /* hurd/ioctl.h */ |