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author | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
commit | 28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch) | |
tree | 15f07c4c43d635959c6afee96bde71fb1b3614ee /hurd/hurd/ioctl.h | |
download | glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz |
initial import
Diffstat (limited to 'hurd/hurd/ioctl.h')
-rw-r--r-- | hurd/hurd/ioctl.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/hurd/hurd/ioctl.h b/hurd/hurd/ioctl.h new file mode 100644 index 0000000000..cc83433c17 --- /dev/null +++ b/hurd/hurd/ioctl.h @@ -0,0 +1,71 @@ +/* User-registered handlers for specific `ioctl' requests. +Copyright (C) 1993, 1994, 1995 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef _HURD_IOCTL_H +#define _HURD_IOCTL_H 1 + +#define __need___va_list +#include <stdarg.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 + { + int first_request, last_request; /* Range of handled request values. */ + + /* 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(handler, first, last) \ + static const struct ioctl_handler handler##_ioctl_handler = \ + { (first), (last), (int (*) (int, int, void *)) (handler), \ + (&(handler), &(handler##_ioctl_handler), NULL) }; \ + text_set_element (_hurd_ioctl_handler_lists, ##handler##_ioctl_handler) + +/* Define a library-internal handler for a single ioctl command. */ + +#define _HURD_HANDLE_IOCTL(handler, ioctl) \ + _HURD_HANDLE_IOCTLS (handler, (ioctl), (ioctl)) + + +/* Lookup the handler for the given ioctl request. */ + +ioctl_handler_t _hurd_lookup_ioctl_handler (int request); + + +#endif /* hurd/ioctl.h */ |