1 | /* |
2 | * Copyright (c) 2000-2021 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */ |
29 | /* |
30 | * Copyright (c) 1982, 1986, 1989, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * Redistribution and use in source and binary forms, with or without |
34 | * modification, are permitted provided that the following conditions |
35 | * are met: |
36 | * 1. Redistributions of source code must retain the above copyright |
37 | * notice, this list of conditions and the following disclaimer. |
38 | * 2. Redistributions in binary form must reproduce the above copyright |
39 | * notice, this list of conditions and the following disclaimer in the |
40 | * documentation and/or other materials provided with the distribution. |
41 | * 3. All advertising materials mentioning features or use of this software |
42 | * must display the following acknowledgement: |
43 | * This product includes software developed by the University of |
44 | * California, Berkeley and its contributors. |
45 | * 4. Neither the name of the University nor the names of its contributors |
46 | * may be used to endorse or promote products derived from this software |
47 | * without specific prior written permission. |
48 | * |
49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
59 | * SUCH DAMAGE. |
60 | * |
61 | * @(#)file.h 8.3 (Berkeley) 1/9/95 |
62 | */ |
63 | |
64 | #ifndef _SYS_FILE_INTERNAL_H_ |
65 | #define _SYS_FILE_INTERNAL_H_ |
66 | |
67 | #include <sys/appleapiopts.h> |
68 | #include <sys/fcntl.h> |
69 | #include <sys/unistd.h> |
70 | |
71 | #ifdef XNU_KERNEL_PRIVATE |
72 | #include <sys/errno.h> |
73 | #include <sys/queue.h> |
74 | #include <sys/cdefs.h> |
75 | #include <sys/constrained_ctypes.h> |
76 | #include <sys/lock.h> |
77 | #include <sys/file.h> |
78 | #include <sys/filedesc.h> |
79 | #include <sys/guarded.h> |
80 | #include <os/refcnt.h> |
81 | |
82 | __BEGIN_DECLS |
83 | |
84 | #pragma GCC visibility push(hidden) |
85 | |
86 | struct proc; |
87 | struct uio; |
88 | struct knote; |
89 | struct kevent_qos_s; |
90 | struct file; |
91 | #ifndef _KAUTH_CRED_T |
92 | #define _KAUTH_CRED_T |
93 | typedef struct ucred *kauth_cred_t; |
94 | typedef struct posix_cred *posix_cred_t; |
95 | #endif /* !_KAUTH_CRED_T */ |
96 | |
97 | __options_decl(fileproc_vflags_t, unsigned int, { |
98 | FPV_NONE = 0, |
99 | FPV_DRAIN = 0x01, |
100 | }); |
101 | |
102 | __options_decl(fileproc_flags_t, uint16_t, { |
103 | FP_NONE = 0, |
104 | FP_CLOEXEC = 0x01, |
105 | FP_CLOFORK = 0x02, |
106 | FP_INSELECT = 0x04, |
107 | FP_AIOISSUED = 0x08, |
108 | FP_SELCONFLICT = 0x10, /* select conflict on an individual fp */ |
109 | }); |
110 | |
111 | struct fileproc_guard { |
112 | struct select_set *fpg_wset; |
113 | guardid_t fpg_guard; |
114 | }; |
115 | |
116 | /* |
117 | * Kernel descriptor table. |
118 | * One entry for each open kernel vnode and socket. |
119 | */ |
120 | struct fileproc { |
121 | os_refcnt_t fp_iocount; |
122 | _Atomic fileproc_vflags_t fp_vflags; |
123 | fileproc_flags_t fp_flags; |
124 | uint16_t fp_guard_attrs; |
125 | struct fileglob *XNU_PTRAUTH_SIGNED_PTR("fileproc.fp_glob" ) fp_glob; |
126 | union { |
127 | struct select_set *fp_wset; /* fp_guard_attrs == 0 */ |
128 | struct fileproc_guard *XNU_PTRAUTH_SIGNED_PTR("fileproc.fp_guard" ) fp_guard; /* fp_guard_attrs != 0 */ |
129 | }; |
130 | }; |
131 | __CCT_DECLARE_CONSTRAINED_PTR_TYPES(struct fileproc, fileproc); |
132 | #define FILEPROC_NULL ((struct fileproc *)0) |
133 | |
134 | /* file types */ |
135 | typedef enum { |
136 | DTYPE_VNODE = 1, /* file */ |
137 | DTYPE_SOCKET, /* communications endpoint */ |
138 | DTYPE_PSXSHM, /* POSIX Shared memory */ |
139 | DTYPE_PSXSEM, /* POSIX Semaphores */ |
140 | DTYPE_KQUEUE, /* kqueue */ |
141 | DTYPE_PIPE, /* pipe */ |
142 | DTYPE_FSEVENTS, /* fsevents */ |
143 | DTYPE_ATALK, /* (obsolete) */ |
144 | DTYPE_NETPOLICY, /* networking policy */ |
145 | DTYPE_CHANNEL, /* Skywalk Channel */ |
146 | DTYPE_NEXUS /* Skywalk Nexus */ |
147 | } file_type_t; |
148 | |
149 | /* defines for fg_lflags */ |
150 | // was FG_TERM 0x01 |
151 | #define FG_INSMSGQ 0x02 /* insert to msgqueue pending .. */ |
152 | #define FG_WINSMSGQ 0x04 /* wait for the fielglob is in msgque */ |
153 | #define FG_RMMSGQ 0x08 /* the fileglob is being removed from msgqueue */ |
154 | #define FG_WRMMSGQ 0x10 /* wait for the fileglob to be removed from msgqueue */ |
155 | #define FG_PORTMADE 0x20 /* a port was at some point created for this fileglob */ |
156 | #define FG_NOSIGPIPE 0x40 /* don't deliver SIGPIPE with EPIPE return */ |
157 | #define FG_OFF_LOCKED 0x80 /* Used as a mutex for offset changes (for vnodes) */ |
158 | #define FG_OFF_LOCKWANT 0x100 /* Somebody's wating for the lock */ |
159 | #define FG_CONFINED 0x200 /* fileglob confined to process, immutably */ |
160 | #define FG_HAS_OFDLOCK 0x400 /* Has or has had an OFD lock */ |
161 | |
162 | struct fileops { |
163 | file_type_t fo_type; /* descriptor type */ |
164 | int (*fo_read) (struct fileproc *fp, struct uio *uio, |
165 | int flags, vfs_context_t ctx); |
166 | int (*fo_write) (struct fileproc *fp, struct uio *uio, |
167 | int flags, vfs_context_t ctx); |
168 | #define FOF_OFFSET 0x00000001 /* offset supplied to vn_write */ |
169 | int (*fo_ioctl)(struct fileproc *fp, u_long com, |
170 | caddr_t data, vfs_context_t ctx); |
171 | int (*fo_select) (struct fileproc *fp, int which, |
172 | void *wql, vfs_context_t ctx); |
173 | int (*fo_close) (struct fileglob *fg, vfs_context_t ctx); |
174 | int (*fo_kqfilter) (struct fileproc *fp, struct knote *, struct kevent_qos_s *); |
175 | int (*fo_drain) (struct fileproc *fp, vfs_context_t ctx); |
176 | }; |
177 | |
178 | struct fileglob { |
179 | LIST_ENTRY(fileglob) f_msglist; /* list of files in unix messages */ |
180 | uint32_t fg_flag; /* (atomic) see fcntl.h */ |
181 | os_ref_atomic_t fg_count; /* reference count */ |
182 | uint32_t fg_msgcount; /* references from message queue */ |
183 | int32_t fg_lflags; /* file global flags */ |
184 | kauth_cred_t XNU_PTRAUTH_SIGNED_PTR("fileglob.fg_cred" ) fg_cred; /* credentials associated with descriptor */ |
185 | const struct fileops *XNU_PTRAUTH_SIGNED_PTR("fileglob.fg_ops" ) fg_ops; |
186 | off_t fg_offset; |
187 | uintptr_t fg_data; /* vnode or socket or SHM or semaphore */ |
188 | struct fd_vn_data *XNU_PTRAUTH_SIGNED_PTR("fileglob.fg_vn_data" ) fg_vn_data; /* Per fd vnode data, used for directories */ |
189 | lck_mtx_t fg_lock; |
190 | #if CONFIG_MACF && CONFIG_VNGUARD |
191 | struct vng_owner *fg_vgo; /* Used by the vnode guard MAC hook */ |
192 | #endif |
193 | }; |
194 | |
195 | /* Disambiguate OFD ids from flock ids (fileglobs) */ |
196 | __pure2 |
197 | static inline caddr_t |
198 | ofd_to_id(const struct fileglob *fg) |
199 | { |
200 | return (caddr_t)~(uintptr_t)fg; |
201 | } |
202 | |
203 | extern int maxfiles; /* kernel limit on number of open files */ |
204 | extern int nfiles; /* actual number of open files */ |
205 | extern int maxfilesperproc; |
206 | os_refgrp_decl_extern(f_refgrp); /* os_refgrp_t for file refcounts */ |
207 | |
208 | #define FILEGLOB_DTYPE(fg) ((const file_type_t)((fg)->fg_ops->fo_type)) |
209 | |
210 | #pragma mark files (struct fileglob) |
211 | |
212 | /*! |
213 | * @function fg_ref |
214 | * |
215 | * @brief |
216 | * Acquire a file reference on the specified file. |
217 | * |
218 | * @description |
219 | * The @c proc must be locked while this operation is being performed |
220 | * to avoid races with setting the FG_CONFINED flag. |
221 | * |
222 | * @param proc |
223 | * The proc this file reference is taken on behalf of. |
224 | * |
225 | * @param fg |
226 | * The specified file |
227 | */ |
228 | void |
229 | fg_ref(proc_t proc, struct fileglob *fg); |
230 | |
231 | /*! |
232 | * @function fg_drop_live |
233 | * |
234 | * @brief |
235 | * Drops a file reference on the specified file that isn't the last one. |
236 | * |
237 | * @param fg |
238 | * The file whose reference is being dropped. |
239 | */ |
240 | void |
241 | fg_drop_live(struct fileglob *fg); |
242 | |
243 | /*! |
244 | * @function fg_drop |
245 | * |
246 | * @brief |
247 | * Drops a file reference on the specified file. |
248 | * |
249 | * @discussion |
250 | * No locks should be held when calling this function. |
251 | * |
252 | * @param p |
253 | * The process making the request, |
254 | * or PROC_NULL if the file belongs to a message/fileport. |
255 | * |
256 | * @param fg |
257 | * The file being closed. |
258 | * |
259 | * @returns |
260 | * 0 Success |
261 | * ??? Any error that @c fileops::fo_close can return |
262 | */ |
263 | int |
264 | fg_drop(proc_t p, struct fileglob *fg); |
265 | |
266 | /*! |
267 | * @function fg_sendable |
268 | * |
269 | * @brief |
270 | * Returns whether a particular file can be sent over IPC. |
271 | */ |
272 | bool |
273 | fg_sendable(struct fileglob *fg); |
274 | |
275 | /*! |
276 | * @function fg_get_data_volatile |
277 | * |
278 | * @brief |
279 | * Returns the fileglob opaque data pointer. |
280 | * |
281 | * @discussion |
282 | * Unlike @c fg_get_data() this variant will |
283 | * not be hoisted by the compiler. |
284 | * |
285 | * @param fg |
286 | * The file whose data is being requested. |
287 | */ |
288 | void * |
289 | fg_get_data_volatile(struct fileglob *fg); |
290 | |
291 | /*! |
292 | * @function fg_get_data |
293 | * |
294 | * @brief |
295 | * Returns the fileglob opaque data pointer. |
296 | * |
297 | * @discussion |
298 | * Unlike @c fg_get_data_volatile() this variant |
299 | * will be hoisted by the compiler if it is called |
300 | * repeatedly. |
301 | * |
302 | * @param fg |
303 | * The file whose data is being requested. |
304 | */ |
305 | __pure2 |
306 | static inline void * |
307 | fg_get_data(struct fileglob *fg) |
308 | { |
309 | return fg_get_data_volatile(fg); |
310 | } |
311 | |
312 | /*! |
313 | * @function fg_set_data |
314 | * |
315 | * @brief |
316 | * Sets the fileglob opaque data pointer. |
317 | * |
318 | * @param fg |
319 | * The file whose data is being set. |
320 | * |
321 | * @param fg_data |
322 | * Opaque file data value |
323 | */ |
324 | void |
325 | fg_set_data(struct fileglob *fg, void *fg_data); |
326 | |
327 | #pragma mark file descriptor entries (struct fileproc) |
328 | |
329 | /*! |
330 | * @function fg_get_data |
331 | * |
332 | * @brief |
333 | * Returns the fileproc fileglob opaque data pointer. |
334 | * |
335 | * @discussion |
336 | * Unlike @c fp_get_data_volatile() this variant |
337 | * will be hoisted by the compiler if it is called |
338 | * repeatedly. |
339 | * |
340 | * @param fp |
341 | * The fileproc whose data is being requested. |
342 | */ |
343 | __pure2 |
344 | static inline void * |
345 | fp_get_data(struct fileproc *fp) |
346 | { |
347 | return fg_get_data(fg: fp->fp_glob); |
348 | } |
349 | |
350 | /*! |
351 | * @function fp_get_data |
352 | * |
353 | * @brief |
354 | * Returns the fileproc fileglob opaque data pointer. |
355 | * |
356 | * @discussion |
357 | * Unlike @c fp_get_data() this variant will |
358 | * not be hoisted by the compiler. |
359 | * |
360 | * @param fp |
361 | * The fileproc whose data is being requested. |
362 | */ |
363 | static inline void * |
364 | fp_get_data_volatile(struct fileproc *fp) |
365 | { |
366 | return fg_get_data_volatile(fg: fp->fp_glob); |
367 | } |
368 | |
369 | /*! |
370 | * @function fp_set_data |
371 | * |
372 | * @brief |
373 | * Sets the fileproc opaque data pointer. |
374 | * |
375 | * @param fp |
376 | * The fileproc whose data is being set. |
377 | * |
378 | * @param fg_data |
379 | * Opaque file data value |
380 | */ |
381 | static inline void |
382 | fp_set_data(struct fileproc *fp, void *fg_data) |
383 | { |
384 | fg_set_data(fg: fp->fp_glob, fg_data); |
385 | } |
386 | |
387 | /*! |
388 | * @function fp_get_ftype |
389 | * |
390 | * @brief |
391 | * Get the fileproc pointer for the given fd from the per process, with the |
392 | * specified file type, and with an I/O reference. |
393 | * |
394 | * @param p |
395 | * The process in which fd lives. |
396 | * |
397 | * @param fd |
398 | * The file descriptor index to lookup. |
399 | * |
400 | * @param ftype |
401 | * The required file type. |
402 | * |
403 | * @param err |
404 | * The error to return if the file exists but isn't of the specified type. |
405 | * |
406 | * @param fpp |
407 | * The returned fileproc when the call returns 0. |
408 | * |
409 | * @returns |
410 | * 0 Success (@c fpp is set) |
411 | * EBADF Bad file descriptor |
412 | * @c err There is an entry, but it isn't of the specified type. |
413 | */ |
414 | extern int |
415 | fp_get_ftype(proc_t p, int fd, file_type_t ftype, int err, struct fileproc **fpp); |
416 | |
417 | /*! |
418 | * @function fp_get_noref_locked |
419 | * |
420 | * @brief |
421 | * Get the fileproc pointer for the given fd from the per process |
422 | * open file table without taking an explicit reference on it. |
423 | * |
424 | * @description |
425 | * This function assumes that the @c proc_fdlock is held, as the caller |
426 | * doesn't hold an I/O reference for the returned fileproc. |
427 | * |
428 | * Because there is no reference explicitly taken, the returned |
429 | * fileproc pointer is only valid so long as the @c proc_fdlock |
430 | * remains held by the caller. |
431 | * |
432 | * @param p |
433 | * The process in which fd lives. |
434 | * |
435 | * @param fd |
436 | * The file descriptor index to lookup. |
437 | * |
438 | * @returns |
439 | * - the fileproc on success |
440 | * - FILEPROC_NULL on error |
441 | */ |
442 | extern struct fileproc * |
443 | fp_get_noref_locked(proc_t p, int fd); |
444 | |
445 | /*! |
446 | * @function fp_get_noref_locked_with_iocount |
447 | * |
448 | * @brief |
449 | * Similar to fp_get_noref_locked(), but allows returning files that are |
450 | * closing. |
451 | * |
452 | * @discussion |
453 | * Some parts of the kernel take I/O references on fileprocs but only remember |
454 | * the file descriptor for which they did that. |
455 | * |
456 | * These interfaces later need to drop that reference, but if the file is |
457 | * already closing, then fp_get_noref_locked() will refuse to resolve |
458 | * the file descriptor. |
459 | * |
460 | * This interface allows the lookup (but will assert that the fileproc has |
461 | * enouhg I/O references). |
462 | * |
463 | * @warning |
464 | * New code should NOT use this function, it is required for interfaces |
465 | * that acquire iocounts without remembering the fileproc pointer, |
466 | * which is bad practice. |
467 | */ |
468 | extern struct fileproc * |
469 | fp_get_noref_locked_with_iocount(proc_t p, int fd); |
470 | |
471 | /*! |
472 | * @function fp_close_and_unlock |
473 | * |
474 | * @brief |
475 | * Close the given file descriptor entry. |
476 | * |
477 | * @description |
478 | * This function assumes that the @c proc_fdlock is held, |
479 | * and that the caller holds no additional I/O reference |
480 | * on the specified file descriptor entry. |
481 | * |
482 | * The @c proc_fdlock is unlocked upon return. |
483 | * |
484 | * @param p The process in which fd lives. |
485 | * @param p_cred The proc's cred for this operation. |
486 | * @param fd The file descriptor index being closed. |
487 | * @param fp The fileproc entry associated with @c fd. |
488 | * @param flags FD_DUP2RESV or 0. |
489 | * |
490 | * @returns |
491 | * 0 Success |
492 | * EBADF Bad file descriptor |
493 | * ??? Any error that @c fileops::fo_close can return. |
494 | */ |
495 | extern int |
496 | fp_close_and_unlock(proc_t p, kauth_cred_t p_cred, int fd, struct fileproc *fp, int flags); |
497 | |
498 | /* wrappers for fp->f_ops->fo_... */ |
499 | int fo_read(struct fileproc *fp, struct uio *uio, int flags, vfs_context_t ctx); |
500 | int fo_write(struct fileproc *fp, struct uio *uio, int flags, |
501 | vfs_context_t ctx); |
502 | int fo_ioctl(struct fileproc *fp, u_long com, caddr_t data, vfs_context_t ctx); |
503 | int fo_select(struct fileproc *fp, int which, void *wql, vfs_context_t ctx); |
504 | int fo_close(struct fileglob *fg, vfs_context_t ctx); |
505 | int fo_drain(struct fileproc *fp, vfs_context_t ctx); |
506 | int fo_kqfilter(struct fileproc *fp, struct knote *kn, struct kevent_qos_s *kev); |
507 | |
508 | /* Functions to use for unsupported fileops */ |
509 | int fo_no_read(struct fileproc *fp, struct uio *uio, int flags, vfs_context_t ctx); |
510 | int fo_no_write(struct fileproc *fp, struct uio *uio, int flags, |
511 | vfs_context_t ctx); |
512 | int fo_no_ioctl(struct fileproc *fp, u_long com, caddr_t data, vfs_context_t ctx); |
513 | int fo_no_select(struct fileproc *fp, int which, void *wql, vfs_context_t ctx); |
514 | int fo_no_drain(struct fileproc *fp, vfs_context_t ctx); |
515 | int fo_no_kqfilter(struct fileproc *, struct knote *, struct kevent_qos_s *kev); |
516 | |
517 | int fp_tryswap(proc_t, int fd, struct fileproc *nfp); |
518 | int fp_drop(struct proc *p, int fd, struct fileproc *fp, int locked); |
519 | void fp_free(struct proc * p, int fd, struct fileproc * fp); |
520 | int fp_lookup(struct proc *p, int fd, struct fileproc **resultfp, int locked); |
521 | int fp_lookup_guarded(struct proc *p, int fd, guardid_t guard, struct fileproc **resultfp, int locked); |
522 | int fp_isguarded(struct fileproc *fp, u_int attribs); |
523 | int fp_guard_exception(proc_t p, int fd, struct fileproc *fp, u_int attribs); |
524 | struct nameidata; |
525 | struct vnode_attr; |
526 | int open1(vfs_context_t ctx, struct nameidata *ndp, int uflags, |
527 | struct vnode_attr *vap, fp_initfn_t fp_init, void *initarg, |
528 | int32_t *retval, int authfd); |
529 | int chdir_internal(proc_t p, vfs_context_t ctx, struct nameidata *ndp, int per_thread); |
530 | int kqueue_internal(struct proc *p, fp_initfn_t, void *initarg, int32_t *retval); |
531 | void procfdtbl_releasefd(struct proc * p, int fd, struct fileproc * fp); |
532 | extern struct fileproc *fileproc_alloc_init(void); |
533 | extern void fileproc_free(struct fileproc *fp); |
534 | extern void guarded_fileproc_copy_guard(struct fileproc *ofp, struct fileproc *nfp); |
535 | extern void guarded_fileproc_unguard(struct fileproc *fp); |
536 | extern void fg_vn_data_free(void *fgvndata); |
537 | extern int nameiat(struct nameidata *ndp, int dirfd); |
538 | extern void vn_offset_lock(struct fileglob *fg); |
539 | extern void vn_offset_unlock(struct fileglob *fg); |
540 | extern int falloc_guarded(struct proc *p, struct fileproc **fp, int *fd, |
541 | vfs_context_t ctx, const guardid_t *guard, u_int attrs); |
542 | extern void fileproc_modify_vflags(struct fileproc *fp, fileproc_vflags_t vflags, boolean_t clearflags); |
543 | fileproc_vflags_t fileproc_get_vflags(struct fileproc *fp); |
544 | |
545 | #pragma mark internal version of syscalls |
546 | |
547 | int fileport_makefd(proc_t p, ipc_port_t port, fileproc_flags_t fp_flags, int *fd); |
548 | int dup2(proc_t p, kauth_cred_t p_cred, int from, int to, int *fd); |
549 | int close_nocancel(proc_t p, kauth_cred_t p_cred, int fd); |
550 | int fchdir(proc_t p, vfs_context_t ctx, int fd, bool per_thread); |
551 | |
552 | #pragma GCC visibility pop |
553 | |
554 | __END_DECLS |
555 | |
556 | #endif /* XNU_KERNEL_PRIVATE */ |
557 | |
558 | #endif /* !_SYS_FILE_INTERNAL_H_ */ |
559 | |