| 1 | /* User-registered handlers for specific `ioctl' requests. |
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| 2 | Copyright (C) 1993-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _HURD_IOCTL_H |
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| 20 | #define _HURD_IOCTL_H 1 |
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| 21 | |
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| 22 | #define __need___va_list |
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| 23 | #include <stdarg.h> |
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| 24 | #include <bits/ioctls.h> |
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| 25 | #include <mach/port.h> |
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| 26 | |
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| 27 | |
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| 28 | /* Type of handler function, called like ioctl to do its entire job. */ |
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| 29 | typedef int (*ioctl_handler_t) (int fd, int request, void *arg); |
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| 30 | |
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| 31 | /* Structure that records an ioctl handler. */ |
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| 32 | struct ioctl_handler |
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| 33 | { |
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| 34 | /* Range of handled _IOC_NOTYPE (REQUEST) values. */ |
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| 35 | int first_request, last_request; |
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| 36 | |
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| 37 | /* Handler function, called like ioctl to do its entire job. */ |
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| 38 | ioctl_handler_t handler; |
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| 39 | |
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| 40 | struct ioctl_handler *next; /* Next handler. */ |
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| 41 | }; |
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| 42 | |
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| 43 | |
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| 44 | /* Register HANDLER to handle ioctls with REQUEST values between |
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| 45 | FIRST_REQUEST and LAST_REQUEST inclusive. Returns zero if successful. |
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| 46 | Return nonzero and sets `errno' for an error. */ |
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| 47 | |
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| 48 | extern int hurd_register_ioctl_handler (int first_request, int last_request, |
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| 49 | ioctl_handler_t handler); |
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| 50 | |
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| 51 | |
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| 52 | /* Define a library-internal handler for ioctl commands between FIRST and |
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| 53 | LAST inclusive. The last element gratuitously references HANDLER to |
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| 54 | avoid `defined but not used' warnings. */ |
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| 55 | |
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| 56 | #define _HURD_HANDLE_IOCTLS_1(handler, first, last, moniker) \ |
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| 57 | static const struct ioctl_handler handler##_ioctl_handler##moniker \ |
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| 58 | __attribute__ ((__unused__)) = \ |
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| 59 | { _IOC_NOTYPE (first), _IOC_NOTYPE (last), \ |
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| 60 | (ioctl_handler_t) (handler), NULL }; \ |
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| 61 | text_set_element (_hurd_ioctl_handler_lists, \ |
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| 62 | handler##_ioctl_handler##moniker) |
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| 63 | #define _HURD_HANDLE_IOCTLS(handler, first, last) \ |
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| 64 | _HURD_HANDLE_IOCTLS_1 (handler, first, last, first##_to_##last) |
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| 65 | |
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| 66 | /* Define a library-internal handler for a single ioctl command. */ |
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| 67 | |
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| 68 | #define _HURD_HANDLE_IOCTL(handler, ioctl) \ |
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| 69 | _HURD_HANDLE_IOCTLS_1 (handler, ioctl, ioctl, ioctl##_only) |
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| 70 | |
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| 71 | |
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| 72 | /* Install a new CTTYID port, atomically updating the dtable appropriately. |
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| 73 | This consumes the send right passed in. */ |
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| 74 | |
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| 75 | void _hurd_locked_install_cttyid (mach_port_t cttyid); |
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| 76 | |
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| 77 | /* Lookup the handler for the given ioctl request. */ |
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| 78 | |
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| 79 | ioctl_handler_t _hurd_lookup_ioctl_handler (int request); |
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| 80 | |
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| 81 | |
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| 82 | #endif /* hurd/ioctl.h */ |
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| 83 | |
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