75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/* User-registered handlers for specific `ioctl' requests.
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Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _HURD_IOCTL_H
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#define _HURD_IOCTL_H 1
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#define __need___va_list
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#include <stdarg.h>
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#include <bits/ioctls.h>
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/* Type of handler function, called like ioctl to do its entire job. */
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typedef int (*ioctl_handler_t) (int fd, int request, void *arg);
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/* Structure that records an ioctl handler. */
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struct ioctl_handler
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{
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/* Range of handled _IOC_NOTYPE (REQUEST) values. */
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int first_request, last_request;
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/* Handler function, called like ioctl to do its entire job. */
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ioctl_handler_t handler;
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struct ioctl_handler *next; /* Next handler. */
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};
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/* Register HANDLER to handle ioctls with REQUEST values between
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FIRST_REQUEST and LAST_REQUEST inclusive. Returns zero if successful.
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Return nonzero and sets `errno' for an error. */
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extern int hurd_register_ioctl_handler (int first_request, int last_request,
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ioctl_handler_t handler);
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/* Define a library-internal handler for ioctl commands between FIRST and
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LAST inclusive. The last element gratuitously references HANDLER to
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avoid `defined but not used' warnings. */
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#define _HURD_HANDLE_IOCTLS(handler, first, last) \
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static const struct ioctl_handler handler##_ioctl_handler \
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__attribute__ ((__unused__)) = \
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{ _IOC_NOTYPE (first), _IOC_NOTYPE (last), \
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(int (*) (int, int, void *)) (handler), NULL }; \
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text_set_element (_hurd_ioctl_handler_lists, ##handler##_ioctl_handler)
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/* Define a library-internal handler for a single ioctl command. */
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#define _HURD_HANDLE_IOCTL(handler, ioctl) \
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_HURD_HANDLE_IOCTLS (handler, (ioctl), (ioctl))
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/* Lookup the handler for the given ioctl request. */
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ioctl_handler_t _hurd_lookup_ioctl_handler (int request);
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#endif /* hurd/ioctl.h */
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