1 /* 2 * Copyright (C) 2005 David Xu <davidxu@freebsd.org>. 3 * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>. 4 * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice(s), this list of conditions and the following disclaimer as 12 * the first lines of this file unmodified other than the possible 13 * addition of one or more copyright notices. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice(s), this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 26 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 28 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the author nor the names of any co-contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 */ 61 62 63 #include "namespace.h" 64 #include <sys/types.h> 65 #include <sys/mman.h> 66 #include <sys/param.h> 67 #include <sys/select.h> 68 #include <sys/signalvar.h> 69 #include <sys/socket.h> 70 #include <sys/stat.h> 71 #include <sys/time.h> 72 #include <sys/uio.h> 73 #include <sys/wait.h> 74 #include <machine/tls.h> 75 #include <aio.h> 76 #include <dirent.h> 77 #include <errno.h> 78 #include <fcntl.h> 79 #include <poll.h> 80 #include <signal.h> 81 #include <stdarg.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <termios.h> 86 #include <unistd.h> 87 #include <pthread.h> 88 #include "un-namespace.h" 89 90 #include "thr_private.h" 91 92 extern int __creat(const char *, mode_t); 93 extern int __pause(void); 94 extern int __sys_pselect(int, fd_set *, fd_set *, fd_set *, 95 const struct timespec *, const sigset_t *); 96 extern unsigned __sleep(unsigned int); 97 extern int __system(const char *); 98 extern int __tcdrain(int); 99 extern int __usleep(unsigned); 100 extern pid_t __wait(int *); 101 extern pid_t __waitpid(pid_t, int *, int); 102 extern int __sys_aio_suspend(const struct aiocb * const[], int, 103 const struct timespec *); 104 extern int __sys_accept(int, struct sockaddr *, socklen_t *); 105 extern int __sys_connect(int, const struct sockaddr *, socklen_t); 106 extern int __sys_fsync(int); 107 extern int __sys_msync(void *, size_t, int); 108 extern int __sys_poll(struct pollfd *, unsigned, int); 109 extern int __sys_ppoll(struct pollfd *, unsigned, const struct timespec *, 110 const sigset_t *); 111 extern ssize_t __sys_recv(int, void *, size_t, int); 112 extern ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 113 extern ssize_t __sys_recvmsg(int, struct msghdr *, int); 114 extern int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 115 extern int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, 116 off_t *, int); 117 extern ssize_t __sys_sendmsg(int, const struct msghdr *, int); 118 extern ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t); 119 extern ssize_t __sys_readv(int, const struct iovec *, int); 120 extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *); 121 extern ssize_t __sys_writev(int, const struct iovec *, int); 122 123 int ___creat(const char *, mode_t); 124 int ___usleep(unsigned); 125 int __accept(int, struct sockaddr *, socklen_t *); 126 int __close(int); 127 int __connect(int, const struct sockaddr *, socklen_t); 128 int __fcntl(int, int,...); 129 int __fsync(int); 130 int __msync(void *, size_t, int); 131 int __nanosleep(const struct timespec *, struct timespec *); 132 int __clock_nanosleep(clock_t, int, const struct timespec *, 133 struct timespec *); 134 int __open(const char *, int,...); 135 int __openat(int fd, const char *, int,...); 136 int __poll(struct pollfd *, unsigned int, int); 137 int __ppoll(struct pollfd *, unsigned int, const struct timespec *, 138 const sigset_t *); 139 ssize_t __read(int, void *buf, size_t); 140 ssize_t __readv(int, const struct iovec *, int); 141 ssize_t __recvfrom(int, void *, size_t, int f, struct sockaddr *, socklen_t *); 142 ssize_t __recvmsg(int, struct msghdr *, int); 143 int __select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 144 ssize_t __sendmsg(int, const struct msghdr *, int); 145 ssize_t __sendto(int, const void *, size_t, int, 146 const struct sockaddr *, socklen_t); 147 pid_t __wait4(pid_t, int *, int, struct rusage *); 148 ssize_t __write(int, const void *, size_t); 149 ssize_t __writev(int, const struct iovec *, int); 150 int _aio_suspend(const struct aiocb * const iocbs[], int, 151 const struct timespec *); 152 int _pause(void); 153 int __pselect(int, fd_set *, fd_set *, fd_set *, 154 const struct timespec *, const sigset_t *); 155 int _raise(int); 156 unsigned _sleep(unsigned); 157 int _system(const char *); 158 int _tcdrain(int); 159 #if 0 160 int _vfork(void); 161 #endif 162 pid_t _wait(int *); 163 164 int 165 __accept(int s, struct sockaddr *addr, socklen_t *addrlen) 166 { 167 pthread_t curthread; 168 int oldcancel; 169 int ret; 170 171 curthread = tls_get_curthread(); 172 oldcancel = _thr_cancel_enter(curthread); 173 ret = __sys_accept(s, addr, addrlen); 174 _thr_cancel_leave(curthread, oldcancel); 175 176 return (ret); 177 } 178 179 __strong_reference(__accept, accept); 180 181 int 182 _aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct 183 timespec *timeout) 184 { 185 pthread_t curthread = tls_get_curthread(); 186 int oldcancel; 187 int ret; 188 189 oldcancel = _thr_cancel_enter(curthread); 190 ret = __sys_aio_suspend(iocbs, niocb, timeout); 191 _thr_cancel_leave(curthread, oldcancel); 192 193 return (ret); 194 } 195 196 __strong_reference(_aio_suspend, aio_suspend); 197 198 int 199 __close(int fd) 200 { 201 pthread_t curthread = tls_get_curthread(); 202 int oldcancel; 203 int ret; 204 205 oldcancel = _thr_cancel_enter(curthread); 206 ret = __sys_close(fd); 207 _thr_cancel_leave(curthread, oldcancel); 208 209 return (ret); 210 } 211 212 __strong_reference(__close, close); 213 214 int 215 __connect(int fd, const struct sockaddr *name, socklen_t namelen) 216 { 217 pthread_t curthread = tls_get_curthread(); 218 int oldcancel; 219 int ret; 220 221 oldcancel = _thr_cancel_enter(curthread); 222 ret = __sys_connect(fd, name, namelen); 223 _thr_cancel_leave(curthread, oldcancel); 224 225 return (ret); 226 } 227 228 __strong_reference(__connect, connect); 229 230 int 231 ___creat(const char *path, mode_t mode) 232 { 233 pthread_t curthread = tls_get_curthread(); 234 int oldcancel; 235 int ret; 236 237 oldcancel = _thr_cancel_enter(curthread); 238 ret = __creat(path, mode); 239 _thr_cancel_leave(curthread, oldcancel); 240 241 return ret; 242 } 243 244 __strong_reference(___creat, creat); 245 246 int 247 __fcntl(int fd, int cmd,...) 248 { 249 pthread_t curthread = tls_get_curthread(); 250 int oldcancel; 251 int ret; 252 va_list ap; 253 254 oldcancel = _thr_cancel_enter(curthread); 255 256 va_start(ap, cmd); 257 switch (cmd) { 258 case F_DUPFD: 259 ret = __sys_fcntl(fd, cmd, va_arg(ap, int)); 260 break; 261 case F_SETFD: 262 case F_SETFL: 263 ret = __sys_fcntl(fd, cmd, va_arg(ap, int)); 264 break; 265 case F_GETFD: 266 case F_GETFL: 267 ret = __sys_fcntl(fd, cmd); 268 break; 269 default: 270 ret = __sys_fcntl(fd, cmd, va_arg(ap, void *)); 271 } 272 va_end(ap); 273 274 _thr_cancel_leave(curthread, oldcancel); 275 276 return (ret); 277 } 278 279 __strong_reference(__fcntl, fcntl); 280 281 int 282 __fsync(int fd) 283 { 284 pthread_t curthread = tls_get_curthread(); 285 int oldcancel; 286 int ret; 287 288 oldcancel = _thr_cancel_enter(curthread); 289 ret = __sys_fsync(fd); 290 _thr_cancel_leave(curthread, oldcancel); 291 292 return (ret); 293 } 294 295 __strong_reference(__fsync, fsync); 296 297 int 298 __msync(void *addr, size_t len, int flags) 299 { 300 pthread_t curthread = tls_get_curthread(); 301 int oldcancel; 302 int ret; 303 304 oldcancel = _thr_cancel_enter(curthread); 305 ret = __sys_msync(addr, len, flags); 306 _thr_cancel_leave(curthread, oldcancel); 307 308 return ret; 309 } 310 311 __strong_reference(__msync, msync); 312 313 int 314 __nanosleep(const struct timespec *time_to_sleep, 315 struct timespec *time_remaining) 316 { 317 pthread_t curthread = tls_get_curthread(); 318 int oldcancel; 319 int ret; 320 321 oldcancel = _thr_cancel_enter(curthread); 322 ret = __sys_nanosleep(time_to_sleep, time_remaining); 323 _thr_cancel_leave(curthread, oldcancel); 324 325 return (ret); 326 } 327 328 __strong_reference(__nanosleep, nanosleep); 329 330 int 331 __clock_nanosleep(clock_t clock_id, int flags, 332 const struct timespec *time_to_sleep, struct timespec *time_remaining) 333 { 334 pthread_t curthread = tls_get_curthread(); 335 int oldcancel; 336 int ret; 337 338 oldcancel = _thr_cancel_enter(curthread); 339 ret = __sys_clock_nanosleep(clock_id, flags, time_to_sleep, 340 time_remaining); 341 _thr_cancel_leave(curthread, oldcancel); 342 343 return (ret); 344 } 345 346 __strong_reference(__clock_nanosleep, clock_nanosleep); 347 348 int 349 __open(const char *path, int flags,...) 350 { 351 pthread_t curthread = tls_get_curthread(); 352 int oldcancel; 353 int ret; 354 int mode = 0; 355 va_list ap; 356 357 oldcancel = _thr_cancel_enter(curthread); 358 359 /* Check if the file is being created: */ 360 if (flags & O_CREAT) { 361 /* Get the creation mode: */ 362 va_start(ap, flags); 363 mode = va_arg(ap, int); 364 va_end(ap); 365 } 366 367 ret = __sys_open(path, flags, mode); 368 369 _thr_cancel_leave(curthread, oldcancel); 370 371 return ret; 372 } 373 374 __strong_reference(__open, open); 375 376 int 377 __openat(int fd, const char *path, int flags,...) 378 { 379 pthread_t curthread = tls_get_curthread(); 380 int oldcancel; 381 int ret; 382 int mode = 0; 383 va_list ap; 384 385 oldcancel = _thr_cancel_enter(curthread); 386 387 /* Check if the file is being created: */ 388 if (flags & O_CREAT) { 389 /* Get the creation mode: */ 390 va_start(ap, flags); 391 mode = va_arg(ap, int); 392 va_end(ap); 393 } 394 395 ret = __sys_openat(fd, path, flags, mode); 396 397 _thr_cancel_leave(curthread, oldcancel); 398 399 return ret; 400 } 401 402 __strong_reference(__openat, openat); 403 404 int 405 _pause(void) 406 { 407 pthread_t curthread = tls_get_curthread(); 408 int oldcancel; 409 int ret; 410 411 oldcancel = _thr_cancel_enter(curthread); 412 ret = __pause(); 413 _thr_cancel_leave(curthread, oldcancel); 414 415 return ret; 416 } 417 418 __strong_reference(_pause, pause); 419 420 int 421 __poll(struct pollfd *fds, unsigned int nfds, int timeout) 422 { 423 pthread_t curthread = tls_get_curthread(); 424 int oldcancel; 425 int ret; 426 427 oldcancel = _thr_cancel_enter(curthread); 428 ret = __sys_poll(fds, nfds, timeout); 429 _thr_cancel_leave(curthread, oldcancel); 430 431 return ret; 432 } 433 434 __strong_reference(__poll, poll); 435 436 int 437 __ppoll(struct pollfd *fds, unsigned int nfds, const struct timespec *ts, 438 const sigset_t *mask) 439 { 440 pthread_t curthread = tls_get_curthread(); 441 int oldcancel; 442 int ret; 443 444 oldcancel = _thr_cancel_enter(curthread); 445 ret = __sys_ppoll(fds, nfds, ts, mask); 446 _thr_cancel_leave(curthread, oldcancel); 447 448 return ret; 449 } 450 451 __strong_reference(__ppoll, ppoll); 452 453 int 454 __pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, 455 const struct timespec *timo, const sigset_t *mask) 456 { 457 pthread_t curthread = tls_get_curthread(); 458 int oldcancel; 459 int ret; 460 461 oldcancel = _thr_cancel_enter(curthread); 462 ret = __sys_pselect(count, rfds, wfds, efds, timo, mask); 463 _thr_cancel_leave(curthread, oldcancel); 464 465 return (ret); 466 } 467 __strong_reference(__pselect, pselect); 468 469 470 int 471 _raise(int sig) 472 { 473 int ret; 474 475 if (!_thr_isthreaded()) 476 ret = kill(getpid(), sig); 477 else 478 ret = _thr_send_sig(tls_get_curthread(), sig); 479 return (ret); 480 } 481 482 __strong_reference(_raise, raise); 483 484 ssize_t 485 __read(int fd, void *buf, size_t nbytes) 486 { 487 pthread_t curthread = tls_get_curthread(); 488 int oldcancel; 489 ssize_t ret; 490 491 oldcancel = _thr_cancel_enter(curthread); 492 ret = __sys_read(fd, buf, nbytes); 493 _thr_cancel_leave(curthread, oldcancel); 494 return ret; 495 } 496 497 __strong_reference(__read, read); 498 499 ssize_t 500 __readv(int fd, const struct iovec *iov, int iovcnt) 501 { 502 pthread_t curthread = tls_get_curthread(); 503 int oldcancel; 504 ssize_t ret; 505 506 oldcancel = _thr_cancel_enter(curthread); 507 ret = __sys_readv(fd, iov, iovcnt); 508 _thr_cancel_leave(curthread, oldcancel); 509 return ret; 510 } 511 512 __strong_reference(__readv, readv); 513 514 ssize_t 515 __recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from, 516 socklen_t *fl) 517 { 518 pthread_t curthread = tls_get_curthread(); 519 int oldcancel; 520 ssize_t ret; 521 522 oldcancel = _thr_cancel_enter(curthread); 523 ret = __sys_recvfrom(s, b, l, f, from, fl); 524 _thr_cancel_leave(curthread, oldcancel); 525 return (ret); 526 } 527 528 __strong_reference(__recvfrom, recvfrom); 529 530 ssize_t 531 __recvmsg(int s, struct msghdr *m, int f) 532 { 533 pthread_t curthread = tls_get_curthread(); 534 ssize_t ret; 535 int oldcancel; 536 537 oldcancel = _thr_cancel_enter(curthread); 538 ret = __sys_recvmsg(s, m, f); 539 _thr_cancel_leave(curthread, oldcancel); 540 return (ret); 541 } 542 543 __strong_reference(__recvmsg, recvmsg); 544 545 int 546 __select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, 547 struct timeval *timeout) 548 { 549 pthread_t curthread = tls_get_curthread(); 550 int oldcancel; 551 int ret; 552 553 oldcancel = _thr_cancel_enter(curthread); 554 ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout); 555 _thr_cancel_leave(curthread, oldcancel); 556 return ret; 557 } 558 559 __strong_reference(__select, select); 560 561 ssize_t 562 __sendmsg(int s, const struct msghdr *m, int f) 563 { 564 pthread_t curthread = tls_get_curthread(); 565 ssize_t ret; 566 int oldcancel; 567 568 oldcancel = _thr_cancel_enter(curthread); 569 ret = __sys_sendmsg(s, m, f); 570 _thr_cancel_leave(curthread, oldcancel); 571 return (ret); 572 } 573 574 __strong_reference(__sendmsg, sendmsg); 575 576 ssize_t 577 __sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t, 578 socklen_t tl) 579 { 580 pthread_t curthread = tls_get_curthread(); 581 ssize_t ret; 582 int oldcancel; 583 584 oldcancel = _thr_cancel_enter(curthread); 585 ret = __sys_sendto(s, m, l, f, t, tl); 586 _thr_cancel_leave(curthread, oldcancel); 587 return (ret); 588 } 589 590 __strong_reference(__sendto, sendto); 591 592 unsigned int 593 _sleep(unsigned int seconds) 594 { 595 pthread_t curthread = tls_get_curthread(); 596 int oldcancel; 597 unsigned int ret; 598 599 oldcancel = _thr_cancel_enter(curthread); 600 ret = __sleep(seconds); 601 _thr_cancel_leave(curthread, oldcancel); 602 return (ret); 603 } 604 605 __strong_reference(_sleep, sleep); 606 607 int 608 _system(const char *string) 609 { 610 pthread_t curthread = tls_get_curthread(); 611 int oldcancel; 612 int ret; 613 614 oldcancel = _thr_cancel_enter(curthread); 615 ret = __system(string); 616 _thr_cancel_leave(curthread, oldcancel); 617 return ret; 618 } 619 620 __strong_reference(_system, system); 621 622 int 623 _tcdrain(int fd) 624 { 625 pthread_t curthread = tls_get_curthread(); 626 int oldcancel; 627 int ret; 628 629 oldcancel = _thr_cancel_enter(curthread); 630 ret = __tcdrain(fd); 631 _thr_cancel_leave(curthread, oldcancel); 632 return (ret); 633 } 634 635 __strong_reference(_tcdrain, tcdrain); 636 637 int 638 ___usleep(unsigned int useconds) 639 { 640 pthread_t curthread = tls_get_curthread(); 641 int oldcancel; 642 int ret; 643 644 oldcancel = _thr_cancel_enter(curthread); 645 ret = __usleep(useconds); 646 _thr_cancel_leave(curthread, oldcancel); 647 return (ret); 648 } 649 650 __strong_reference(___usleep, usleep); 651 652 #if 0 653 /* 654 * REMOVED - vfork() works as per normal. In a threaded environment vfork() 655 * blocks the calling thread only and not other threads. 656 */ 657 int 658 _vfork(void) 659 { 660 return (fork()); 661 } 662 663 __strong_reference(_vfork, vfork); 664 #endif 665 666 pid_t 667 _wait(int *istat) 668 { 669 pthread_t curthread = tls_get_curthread(); 670 int oldcancel; 671 pid_t ret; 672 673 oldcancel = _thr_cancel_enter(curthread); 674 ret = __wait(istat); 675 _thr_cancel_leave(curthread, oldcancel); 676 return ret; 677 } 678 679 __strong_reference(_wait, wait); 680 681 pid_t 682 __wait4(pid_t pid, int *istat, int options, struct rusage *rusage) 683 { 684 pthread_t curthread = tls_get_curthread(); 685 int oldcancel; 686 pid_t ret; 687 688 oldcancel = _thr_cancel_enter(curthread); 689 ret = __sys_wait4(pid, istat, options, rusage); 690 _thr_cancel_leave(curthread, oldcancel); 691 return ret; 692 } 693 694 __strong_reference(__wait4, wait4); 695 696 pid_t 697 _waitpid(pid_t wpid, int *status, int options) 698 { 699 pthread_t curthread = tls_get_curthread(); 700 int oldcancel; 701 pid_t ret; 702 703 oldcancel = _thr_cancel_enter(curthread); 704 ret = __waitpid(wpid, status, options); 705 _thr_cancel_leave(curthread, oldcancel); 706 return ret; 707 } 708 709 __strong_reference(_waitpid, waitpid); 710 711 ssize_t 712 __write(int fd, const void *buf, size_t nbytes) 713 { 714 pthread_t curthread = tls_get_curthread(); 715 int oldcancel; 716 ssize_t ret; 717 718 oldcancel = _thr_cancel_enter(curthread); 719 ret = __sys_write(fd, buf, nbytes); 720 _thr_cancel_leave(curthread, oldcancel); 721 return ret; 722 } 723 724 __strong_reference(__write, write); 725 726 ssize_t 727 __writev(int fd, const struct iovec *iov, int iovcnt) 728 { 729 pthread_t curthread = tls_get_curthread(); 730 int oldcancel; 731 ssize_t ret; 732 733 oldcancel = _thr_cancel_enter(curthread); 734 ret = __sys_writev(fd, iov, iovcnt); 735 _thr_cancel_leave(curthread, oldcancel); 736 return ret; 737 } 738 739 __strong_reference(__writev, writev); 740