| 1 | /* User-registered handlers for specific `ioctl' requests. |
|---|
| 2 | Copyright (C) 1993-2022 Free Software Foundation, Inc. |
|---|
| 3 | This file is part of the GNU C Library. |
|---|
| 4 | |
|---|
| 5 | The GNU C Library is free software; you can redistribute it and/or |
|---|
| 6 | modify it under the terms of the GNU Lesser General Public |
|---|
| 7 | License as published by the Free Software Foundation; either |
|---|
| 8 | version 2.1 of the License, or (at your option) any later version. |
|---|
| 9 | |
|---|
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
|---|
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 13 | Lesser General Public License for more details. |
|---|
| 14 | |
|---|
| 15 | You should have received a copy of the GNU Lesser General Public |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | #ifndef _HURD_IOCTL_H |
|---|
| 20 | #define _HURD_IOCTL_H 1 |
|---|
| 21 | |
|---|
| 22 | #define __need___va_list |
|---|
| 23 | #include <stdarg.h> |
|---|
| 24 | #include <bits/ioctls.h> |
|---|
| 25 | #include <mach/port.h> |
|---|
| 26 | |
|---|
| 27 | |
|---|
| 28 | /* Type of handler function, called like ioctl to do its entire job. */ |
|---|
| 29 | typedef int (*ioctl_handler_t) (int fd, int request, void *arg); |
|---|
| 30 | |
|---|
| 31 | /* Structure that records an ioctl handler. */ |
|---|
| 32 | struct ioctl_handler |
|---|
| 33 | { |
|---|
| 34 | /* Range of handled _IOC_NOTYPE (REQUEST) values. */ |
|---|
| 35 | int first_request, last_request; |
|---|
| 36 | |
|---|
| 37 | /* Handler function, called like ioctl to do its entire job. */ |
|---|
| 38 | ioctl_handler_t handler; |
|---|
| 39 | |
|---|
| 40 | struct ioctl_handler *next; /* Next handler. */ |
|---|
| 41 | }; |
|---|
| 42 | |
|---|
| 43 | |
|---|
| 44 | /* Register HANDLER to handle ioctls with REQUEST values between |
|---|
| 45 | FIRST_REQUEST and LAST_REQUEST inclusive. Returns zero if successful. |
|---|
| 46 | Return nonzero and sets `errno' for an error. */ |
|---|
| 47 | |
|---|
| 48 | extern int hurd_register_ioctl_handler (int first_request, int last_request, |
|---|
| 49 | ioctl_handler_t handler); |
|---|
| 50 | |
|---|
| 51 | |
|---|
| 52 | /* Define a library-internal handler for ioctl commands between FIRST and |
|---|
| 53 | LAST inclusive. The last element gratuitously references HANDLER to |
|---|
| 54 | avoid `defined but not used' warnings. */ |
|---|
| 55 | |
|---|
| 56 | #define _HURD_HANDLE_IOCTLS_1(handler, first, last, moniker) \ |
|---|
| 57 | static const struct ioctl_handler handler##_ioctl_handler##moniker \ |
|---|
| 58 | __attribute__ ((__unused__)) = \ |
|---|
| 59 | { _IOC_NOTYPE (first), _IOC_NOTYPE (last), \ |
|---|
| 60 | (ioctl_handler_t) (handler), NULL }; \ |
|---|
| 61 | text_set_element (_hurd_ioctl_handler_lists, \ |
|---|
| 62 | handler##_ioctl_handler##moniker) |
|---|
| 63 | #define _HURD_HANDLE_IOCTLS(handler, first, last) \ |
|---|
| 64 | _HURD_HANDLE_IOCTLS_1 (handler, first, last, first##_to_##last) |
|---|
| 65 | |
|---|
| 66 | /* Define a library-internal handler for a single ioctl command. */ |
|---|
| 67 | |
|---|
| 68 | #define _HURD_HANDLE_IOCTL(handler, ioctl) \ |
|---|
| 69 | _HURD_HANDLE_IOCTLS_1 (handler, ioctl, ioctl, ioctl##_only) |
|---|
| 70 | |
|---|
| 71 | |
|---|
| 72 | /* Install a new CTTYID port, atomically updating the dtable appropriately. |
|---|
| 73 | This consumes the send right passed in. */ |
|---|
| 74 | |
|---|
| 75 | void _hurd_locked_install_cttyid (mach_port_t cttyid); |
|---|
| 76 | |
|---|
| 77 | /* Lookup the handler for the given ioctl request. */ |
|---|
| 78 | |
|---|
| 79 | ioctl_handler_t _hurd_lookup_ioctl_handler (int request); |
|---|
| 80 | |
|---|
| 81 | |
|---|
| 82 | #endif /* hurd/ioctl.h */ |
|---|
| 83 | |
|---|
