2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/capsicum.h>
31 #include <sys/filedesc.h>
34 #include <sys/socketvar.h>
35 #include <sys/syscallsubr.h>
36 #include <sys/sysproto.h>
37 #include <sys/systm.h>
38 #include <sys/unistd.h>
39 #include <sys/vnode.h>
41 #include <contrib/cloudabi/cloudabi_types_common.h>
43 #include <compat/cloudabi/cloudabi_proto.h>
44 #include <compat/cloudabi/cloudabi_util.h>
46 /* Translation between CloudABI and Capsicum rights. */
47 #define RIGHTS_MAPPINGS \
48 MAPPING(CLOUDABI_RIGHT_FD_DATASYNC, CAP_FSYNC) \
49 MAPPING(CLOUDABI_RIGHT_FD_READ, CAP_READ) \
50 MAPPING(CLOUDABI_RIGHT_FD_SEEK, CAP_SEEK) \
51 MAPPING(CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS, CAP_FCNTL) \
52 MAPPING(CLOUDABI_RIGHT_FD_SYNC, CAP_FSYNC) \
53 MAPPING(CLOUDABI_RIGHT_FD_TELL, CAP_SEEK_TELL) \
54 MAPPING(CLOUDABI_RIGHT_FD_WRITE, CAP_WRITE) \
55 MAPPING(CLOUDABI_RIGHT_FILE_ADVISE) \
56 MAPPING(CLOUDABI_RIGHT_FILE_ALLOCATE, CAP_WRITE) \
57 MAPPING(CLOUDABI_RIGHT_FILE_CREATE_DIRECTORY, CAP_MKDIRAT) \
58 MAPPING(CLOUDABI_RIGHT_FILE_CREATE_FILE, CAP_CREATE) \
59 MAPPING(CLOUDABI_RIGHT_FILE_CREATE_FIFO, CAP_MKFIFOAT) \
60 MAPPING(CLOUDABI_RIGHT_FILE_LINK_SOURCE, CAP_LINKAT_SOURCE) \
61 MAPPING(CLOUDABI_RIGHT_FILE_LINK_TARGET, CAP_LINKAT_TARGET) \
62 MAPPING(CLOUDABI_RIGHT_FILE_OPEN, CAP_LOOKUP) \
63 MAPPING(CLOUDABI_RIGHT_FILE_READDIR, CAP_READ) \
64 MAPPING(CLOUDABI_RIGHT_FILE_READLINK, CAP_LOOKUP) \
65 MAPPING(CLOUDABI_RIGHT_FILE_RENAME_SOURCE, CAP_RENAMEAT_SOURCE) \
66 MAPPING(CLOUDABI_RIGHT_FILE_RENAME_TARGET, CAP_RENAMEAT_TARGET) \
67 MAPPING(CLOUDABI_RIGHT_FILE_STAT_FGET, CAP_FSTAT) \
68 MAPPING(CLOUDABI_RIGHT_FILE_STAT_FPUT_SIZE, CAP_FTRUNCATE) \
69 MAPPING(CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES, CAP_FUTIMES) \
70 MAPPING(CLOUDABI_RIGHT_FILE_STAT_GET, CAP_FSTATAT) \
71 MAPPING(CLOUDABI_RIGHT_FILE_STAT_PUT_TIMES, CAP_FUTIMESAT) \
72 MAPPING(CLOUDABI_RIGHT_FILE_SYMLINK, CAP_SYMLINKAT) \
73 MAPPING(CLOUDABI_RIGHT_FILE_UNLINK, CAP_UNLINKAT) \
74 MAPPING(CLOUDABI_RIGHT_MEM_MAP, CAP_MMAP) \
75 MAPPING(CLOUDABI_RIGHT_MEM_MAP_EXEC, CAP_MMAP_X) \
76 MAPPING(CLOUDABI_RIGHT_POLL_FD_READWRITE, CAP_EVENT) \
77 MAPPING(CLOUDABI_RIGHT_POLL_MODIFY, CAP_KQUEUE_CHANGE) \
78 MAPPING(CLOUDABI_RIGHT_POLL_PROC_TERMINATE, CAP_EVENT) \
79 MAPPING(CLOUDABI_RIGHT_POLL_WAIT, CAP_KQUEUE_EVENT) \
80 MAPPING(CLOUDABI_RIGHT_PROC_EXEC, CAP_FEXECVE) \
81 MAPPING(CLOUDABI_RIGHT_SOCK_ACCEPT, CAP_ACCEPT) \
82 MAPPING(CLOUDABI_RIGHT_SOCK_BIND_DIRECTORY, CAP_BINDAT) \
83 MAPPING(CLOUDABI_RIGHT_SOCK_BIND_SOCKET, CAP_BIND) \
84 MAPPING(CLOUDABI_RIGHT_SOCK_CONNECT_DIRECTORY, CAP_CONNECTAT) \
85 MAPPING(CLOUDABI_RIGHT_SOCK_CONNECT_SOCKET, CAP_CONNECT) \
86 MAPPING(CLOUDABI_RIGHT_SOCK_LISTEN, CAP_LISTEN) \
87 MAPPING(CLOUDABI_RIGHT_SOCK_SHUTDOWN, CAP_SHUTDOWN) \
88 MAPPING(CLOUDABI_RIGHT_SOCK_STAT_GET, CAP_GETPEERNAME, \
89 CAP_GETSOCKNAME, CAP_GETSOCKOPT)
92 cloudabi_sys_fd_close(struct thread *td, struct cloudabi_sys_fd_close_args *uap)
95 return (kern_close(td, uap->fd));
99 cloudabi_sys_fd_create1(struct thread *td,
100 struct cloudabi_sys_fd_create1_args *uap)
102 struct filecaps fcaps = {};
103 struct socket_args socket_args = {
108 case CLOUDABI_FILETYPE_POLL:
109 cap_rights_init(&fcaps.fc_rights, CAP_FSTAT, CAP_KQUEUE);
110 return (kern_kqueue(td, 0, &fcaps));
111 case CLOUDABI_FILETYPE_SHARED_MEMORY:
112 cap_rights_init(&fcaps.fc_rights, CAP_FSTAT, CAP_FTRUNCATE,
114 return (kern_shm_open(td, SHM_ANON, O_RDWR, 0, &fcaps));
115 case CLOUDABI_FILETYPE_SOCKET_DGRAM:
116 socket_args.type = SOCK_DGRAM;
117 return (sys_socket(td, &socket_args));
118 case CLOUDABI_FILETYPE_SOCKET_SEQPACKET:
119 socket_args.type = SOCK_SEQPACKET;
120 return (sys_socket(td, &socket_args));
121 case CLOUDABI_FILETYPE_SOCKET_STREAM:
122 socket_args.type = SOCK_STREAM;
123 return (sys_socket(td, &socket_args));
130 cloudabi_sys_fd_create2(struct thread *td,
131 struct cloudabi_sys_fd_create2_args *uap)
133 struct filecaps fcaps1 = {}, fcaps2 = {};
138 case CLOUDABI_FILETYPE_FIFO:
140 * CloudABI pipes are unidirectional. Restrict rights on
141 * the pipe to simulate this.
143 cap_rights_init(&fcaps1.fc_rights, CAP_EVENT, CAP_FCNTL,
144 CAP_FSTAT, CAP_READ);
145 fcaps1.fc_fcntls = CAP_FCNTL_SETFL;
146 cap_rights_init(&fcaps2.fc_rights, CAP_EVENT, CAP_FCNTL,
147 CAP_FSTAT, CAP_WRITE);
148 fcaps2.fc_fcntls = CAP_FCNTL_SETFL;
149 error = kern_pipe(td, fds, 0, &fcaps1, &fcaps2);
151 case CLOUDABI_FILETYPE_SOCKET_DGRAM:
152 error = kern_socketpair(td, AF_UNIX, SOCK_DGRAM, 0, fds);
154 case CLOUDABI_FILETYPE_SOCKET_SEQPACKET:
155 error = kern_socketpair(td, AF_UNIX, SOCK_SEQPACKET, 0, fds);
157 case CLOUDABI_FILETYPE_SOCKET_STREAM:
158 error = kern_socketpair(td, AF_UNIX, SOCK_STREAM, 0, fds);
165 td->td_retval[0] = fds[0];
166 td->td_retval[1] = fds[1];
172 cloudabi_sys_fd_datasync(struct thread *td,
173 struct cloudabi_sys_fd_datasync_args *uap)
176 return (kern_fsync(td, uap->fd, false));
180 cloudabi_sys_fd_dup(struct thread *td, struct cloudabi_sys_fd_dup_args *uap)
183 return (kern_dup(td, FDDUP_NORMAL, 0, uap->from, 0));
187 cloudabi_sys_fd_replace(struct thread *td,
188 struct cloudabi_sys_fd_replace_args *uap)
193 * CloudABI's equivalent to dup2(). CloudABI processes should
194 * not depend on hardcoded file descriptor layouts, but simply
195 * use the file descriptor numbers that are allocated by the
196 * kernel. Duplicating file descriptors to arbitrary numbers
197 * should not be done.
199 * Invoke kern_dup() with FDDUP_MUSTREPLACE, so that we return
200 * EBADF when duplicating to a nonexistent file descriptor. Also
201 * clear the return value, as this system call yields no return
204 error = kern_dup(td, FDDUP_MUSTREPLACE, 0, uap->from, uap->to);
205 td->td_retval[0] = 0;
210 cloudabi_sys_fd_seek(struct thread *td, struct cloudabi_sys_fd_seek_args *uap)
212 struct lseek_args lseek_args = {
214 .offset = uap->offset
217 switch (uap->whence) {
218 case CLOUDABI_WHENCE_CUR:
219 lseek_args.whence = SEEK_CUR;
221 case CLOUDABI_WHENCE_END:
222 lseek_args.whence = SEEK_END;
224 case CLOUDABI_WHENCE_SET:
225 lseek_args.whence = SEEK_SET;
231 return (sys_lseek(td, &lseek_args));
234 /* Converts a file descriptor to a CloudABI file descriptor type. */
236 cloudabi_convert_filetype(const struct file *fp)
241 switch (fp->f_type) {
243 return (CLOUDABI_FILETYPE_FIFO);
245 return (CLOUDABI_FILETYPE_POLL);
247 return (CLOUDABI_FILETYPE_FIFO);
249 return (CLOUDABI_FILETYPE_PROCESS);
251 return (CLOUDABI_FILETYPE_SHARED_MEMORY);
254 switch (so->so_type) {
256 return (CLOUDABI_FILETYPE_SOCKET_DGRAM);
258 return (CLOUDABI_FILETYPE_SOCKET_SEQPACKET);
260 return (CLOUDABI_FILETYPE_SOCKET_STREAM);
262 return (CLOUDABI_FILETYPE_UNKNOWN);
266 switch (vp->v_type) {
268 return (CLOUDABI_FILETYPE_BLOCK_DEVICE);
270 return (CLOUDABI_FILETYPE_CHARACTER_DEVICE);
272 return (CLOUDABI_FILETYPE_DIRECTORY);
274 return (CLOUDABI_FILETYPE_FIFO);
276 return (CLOUDABI_FILETYPE_SYMBOLIC_LINK);
278 return (CLOUDABI_FILETYPE_REGULAR_FILE);
280 return (CLOUDABI_FILETYPE_SOCKET_STREAM);
282 return (CLOUDABI_FILETYPE_UNKNOWN);
285 return (CLOUDABI_FILETYPE_UNKNOWN);
289 /* Removes rights that conflict with the file descriptor type. */
291 cloudabi_remove_conflicting_rights(cloudabi_filetype_t filetype,
292 cloudabi_rights_t *base, cloudabi_rights_t *inheriting)
296 * CloudABI has a small number of additional rights bits to
297 * disambiguate between multiple purposes. Remove the bits that
298 * don't apply to the type of the file descriptor.
300 * As file descriptor access modes (O_ACCMODE) has been fully
301 * replaced by rights bits, CloudABI distinguishes between
302 * rights that apply to the file descriptor itself (base) versus
303 * rights of new file descriptors derived from them
304 * (inheriting). The code below approximates the pair by
305 * decomposing depending on the file descriptor type.
307 * We need to be somewhat accurate about which actions can
308 * actually be performed on the file descriptor, as functions
309 * like fcntl(fd, F_GETFL) are emulated on top of this.
312 case CLOUDABI_FILETYPE_DIRECTORY:
313 *base &= CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS |
314 CLOUDABI_RIGHT_FD_SYNC | CLOUDABI_RIGHT_FILE_ADVISE |
315 CLOUDABI_RIGHT_FILE_CREATE_DIRECTORY |
316 CLOUDABI_RIGHT_FILE_CREATE_FILE |
317 CLOUDABI_RIGHT_FILE_CREATE_FIFO |
318 CLOUDABI_RIGHT_FILE_LINK_SOURCE |
319 CLOUDABI_RIGHT_FILE_LINK_TARGET |
320 CLOUDABI_RIGHT_FILE_OPEN |
321 CLOUDABI_RIGHT_FILE_READDIR |
322 CLOUDABI_RIGHT_FILE_READLINK |
323 CLOUDABI_RIGHT_FILE_RENAME_SOURCE |
324 CLOUDABI_RIGHT_FILE_RENAME_TARGET |
325 CLOUDABI_RIGHT_FILE_STAT_FGET |
326 CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES |
327 CLOUDABI_RIGHT_FILE_STAT_GET |
328 CLOUDABI_RIGHT_FILE_STAT_PUT_TIMES |
329 CLOUDABI_RIGHT_FILE_SYMLINK |
330 CLOUDABI_RIGHT_FILE_UNLINK |
331 CLOUDABI_RIGHT_POLL_FD_READWRITE |
332 CLOUDABI_RIGHT_SOCK_BIND_DIRECTORY |
333 CLOUDABI_RIGHT_SOCK_CONNECT_DIRECTORY;
334 *inheriting &= CLOUDABI_RIGHT_FD_DATASYNC |
335 CLOUDABI_RIGHT_FD_READ |
336 CLOUDABI_RIGHT_FD_SEEK |
337 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS |
338 CLOUDABI_RIGHT_FD_SYNC |
339 CLOUDABI_RIGHT_FD_TELL |
340 CLOUDABI_RIGHT_FD_WRITE |
341 CLOUDABI_RIGHT_FILE_ADVISE |
342 CLOUDABI_RIGHT_FILE_ALLOCATE |
343 CLOUDABI_RIGHT_FILE_CREATE_DIRECTORY |
344 CLOUDABI_RIGHT_FILE_CREATE_FILE |
345 CLOUDABI_RIGHT_FILE_CREATE_FIFO |
346 CLOUDABI_RIGHT_FILE_LINK_SOURCE |
347 CLOUDABI_RIGHT_FILE_LINK_TARGET |
348 CLOUDABI_RIGHT_FILE_OPEN |
349 CLOUDABI_RIGHT_FILE_READDIR |
350 CLOUDABI_RIGHT_FILE_READLINK |
351 CLOUDABI_RIGHT_FILE_RENAME_SOURCE |
352 CLOUDABI_RIGHT_FILE_RENAME_TARGET |
353 CLOUDABI_RIGHT_FILE_STAT_FGET |
354 CLOUDABI_RIGHT_FILE_STAT_FPUT_SIZE |
355 CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES |
356 CLOUDABI_RIGHT_FILE_STAT_GET |
357 CLOUDABI_RIGHT_FILE_STAT_PUT_TIMES |
358 CLOUDABI_RIGHT_FILE_SYMLINK |
359 CLOUDABI_RIGHT_FILE_UNLINK |
360 CLOUDABI_RIGHT_MEM_MAP |
361 CLOUDABI_RIGHT_MEM_MAP_EXEC |
362 CLOUDABI_RIGHT_POLL_FD_READWRITE |
363 CLOUDABI_RIGHT_PROC_EXEC |
364 CLOUDABI_RIGHT_SOCK_BIND_DIRECTORY |
365 CLOUDABI_RIGHT_SOCK_CONNECT_DIRECTORY;
367 case CLOUDABI_FILETYPE_FIFO:
368 *base &= CLOUDABI_RIGHT_FD_READ |
369 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS |
370 CLOUDABI_RIGHT_FD_WRITE |
371 CLOUDABI_RIGHT_FILE_STAT_FGET |
372 CLOUDABI_RIGHT_POLL_FD_READWRITE;
375 case CLOUDABI_FILETYPE_POLL:
376 *base &= ~CLOUDABI_RIGHT_FILE_ADVISE;
379 case CLOUDABI_FILETYPE_PROCESS:
380 *base &= ~(CLOUDABI_RIGHT_FILE_ADVISE |
381 CLOUDABI_RIGHT_POLL_FD_READWRITE);
384 case CLOUDABI_FILETYPE_REGULAR_FILE:
385 *base &= CLOUDABI_RIGHT_FD_DATASYNC |
386 CLOUDABI_RIGHT_FD_READ |
387 CLOUDABI_RIGHT_FD_SEEK |
388 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS |
389 CLOUDABI_RIGHT_FD_SYNC |
390 CLOUDABI_RIGHT_FD_TELL |
391 CLOUDABI_RIGHT_FD_WRITE |
392 CLOUDABI_RIGHT_FILE_ADVISE |
393 CLOUDABI_RIGHT_FILE_ALLOCATE |
394 CLOUDABI_RIGHT_FILE_STAT_FGET |
395 CLOUDABI_RIGHT_FILE_STAT_FPUT_SIZE |
396 CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES |
397 CLOUDABI_RIGHT_MEM_MAP |
398 CLOUDABI_RIGHT_MEM_MAP_EXEC |
399 CLOUDABI_RIGHT_POLL_FD_READWRITE |
400 CLOUDABI_RIGHT_PROC_EXEC;
403 case CLOUDABI_FILETYPE_SHARED_MEMORY:
404 *base &= ~(CLOUDABI_RIGHT_FD_SEEK |
405 CLOUDABI_RIGHT_FD_TELL |
406 CLOUDABI_RIGHT_FILE_ADVISE |
407 CLOUDABI_RIGHT_FILE_ALLOCATE |
408 CLOUDABI_RIGHT_FILE_READDIR);
411 case CLOUDABI_FILETYPE_SOCKET_DGRAM:
412 case CLOUDABI_FILETYPE_SOCKET_SEQPACKET:
413 case CLOUDABI_FILETYPE_SOCKET_STREAM:
414 *base &= CLOUDABI_RIGHT_FD_READ |
415 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS |
416 CLOUDABI_RIGHT_FD_WRITE |
417 CLOUDABI_RIGHT_FILE_STAT_FGET |
418 CLOUDABI_RIGHT_POLL_FD_READWRITE |
419 CLOUDABI_RIGHT_SOCK_ACCEPT |
420 CLOUDABI_RIGHT_SOCK_BIND_SOCKET |
421 CLOUDABI_RIGHT_SOCK_CONNECT_SOCKET |
422 CLOUDABI_RIGHT_SOCK_LISTEN |
423 CLOUDABI_RIGHT_SOCK_SHUTDOWN |
424 CLOUDABI_RIGHT_SOCK_STAT_GET;
432 /* Converts FreeBSD's Capsicum rights to CloudABI's set of rights. */
434 convert_capabilities(const cap_rights_t *capabilities,
435 cloudabi_filetype_t filetype, cloudabi_rights_t *base,
436 cloudabi_rights_t *inheriting)
438 cloudabi_rights_t rights;
440 /* Convert FreeBSD bits to CloudABI bits. */
442 #define MAPPING(cloudabi, ...) do { \
443 if (cap_rights_is_set(capabilities, ##__VA_ARGS__)) \
444 rights |= (cloudabi); \
450 *inheriting = rights;
451 cloudabi_remove_conflicting_rights(filetype, base, inheriting);
455 cloudabi_sys_fd_stat_get(struct thread *td,
456 struct cloudabi_sys_fd_stat_get_args *uap)
458 cloudabi_fdstat_t fsb = {};
461 struct filecaps fcaps;
464 /* Obtain file descriptor properties. */
465 error = fget_cap(td, uap->fd, cap_rights_init(&rights), &fp,
469 oflags = OFLAGS(fp->f_flag);
470 fsb.fs_filetype = cloudabi_convert_filetype(fp);
473 /* Convert file descriptor flags. */
474 if (oflags & O_APPEND)
475 fsb.fs_flags |= CLOUDABI_FDFLAG_APPEND;
476 if (oflags & O_NONBLOCK)
477 fsb.fs_flags |= CLOUDABI_FDFLAG_NONBLOCK;
479 fsb.fs_flags |= CLOUDABI_FDFLAG_SYNC;
481 /* Convert capabilities to CloudABI rights. */
482 convert_capabilities(&fcaps.fc_rights, fsb.fs_filetype,
483 &fsb.fs_rights_base, &fsb.fs_rights_inheriting);
484 filecaps_free(&fcaps);
485 return (copyout(&fsb, (void *)uap->buf, sizeof(fsb)));
488 /* Converts CloudABI rights to a set of Capsicum capabilities. */
490 cloudabi_convert_rights(cloudabi_rights_t in, cap_rights_t *out)
493 cap_rights_init(out);
494 #define MAPPING(cloudabi, ...) do { \
495 if (in & (cloudabi)) { \
496 cap_rights_set(out, ##__VA_ARGS__); \
503 return (ENOTCAPABLE);
508 cloudabi_sys_fd_stat_put(struct thread *td,
509 struct cloudabi_sys_fd_stat_put_args *uap)
511 cloudabi_fdstat_t fsb;
515 error = copyin(uap->buf, &fsb, sizeof(fsb));
519 if (uap->flags == CLOUDABI_FDSTAT_FLAGS) {
522 if (fsb.fs_flags & CLOUDABI_FDFLAG_APPEND)
524 if (fsb.fs_flags & CLOUDABI_FDFLAG_NONBLOCK)
525 oflags |= O_NONBLOCK;
526 if (fsb.fs_flags & (CLOUDABI_FDFLAG_SYNC |
527 CLOUDABI_FDFLAG_DSYNC | CLOUDABI_FDFLAG_RSYNC))
529 return (kern_fcntl(td, uap->fd, F_SETFL, oflags));
530 } else if (uap->flags == CLOUDABI_FDSTAT_RIGHTS) {
531 /* Convert rights. */
532 error = cloudabi_convert_rights(
533 fsb.fs_rights_base | fsb.fs_rights_inheriting, &rights);
536 return (kern_cap_rights_limit(td, uap->fd, &rights));
542 cloudabi_sys_fd_sync(struct thread *td, struct cloudabi_sys_fd_sync_args *uap)
545 return (kern_fsync(td, uap->fd, true));