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 * $FreeBSD$ 32 */ 33 34 /* 35 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the author nor the names of any co-contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 */ 63 64 #include "namespace.h" 65 #include <sys/types.h> 66 #include <sys/mman.h> 67 #include <sys/param.h> 68 #include <sys/select.h> 69 #include <sys/signalvar.h> 70 #include <sys/socket.h> 71 #include <sys/stat.h> 72 #include <sys/time.h> 73 #include <sys/uio.h> 74 #include <sys/wait.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 __pselect(int, fd_set *, fd_set *, fd_set *, 94 const struct timespec *, const sigset_t *); 95 extern unsigned __sleep(unsigned int); 96 extern int __system(const char *); 97 extern int __tcdrain(int); 98 extern int __usleep(useconds_t); 99 extern pid_t __wait(int *); 100 extern pid_t __waitpid(pid_t, int *, int); 101 extern int __sys_aio_suspend(const struct aiocb * const[], int, 102 const struct timespec *); 103 extern int __sys_accept(int, struct sockaddr *, socklen_t *); 104 extern int __sys_connect(int, const struct sockaddr *, socklen_t); 105 extern int __sys_fsync(int); 106 extern int __sys_msync(void *, size_t, int); 107 extern int __sys_pselect(int, fd_set *, fd_set *, fd_set *, 108 const struct timespec *, const sigset_t *); 109 extern int __sys_poll(struct pollfd *, unsigned, int); 110 extern ssize_t __sys_recv(int, void *, size_t, int); 111 extern ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 112 extern ssize_t __sys_recvmsg(int, struct msghdr *, int); 113 extern int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 114 extern int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, 115 off_t *, int); 116 extern ssize_t __sys_sendmsg(int, const struct msghdr *, int); 117 extern ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t); 118 extern ssize_t __sys_readv(int, const struct iovec *, int); 119 extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *); 120 extern ssize_t __sys_writev(int, const struct iovec *, int); 121 122 int ___creat(const char *, mode_t); 123 int ___pselect(int, fd_set *, fd_set *, fd_set *, 124 const struct timespec *, const sigset_t *); 125 unsigned ___sleep(unsigned); 126 int ___system(const char *); 127 int ___tcdrain(int); 128 int ___usleep(useconds_t useconds); 129 pid_t ___wait(int *); 130 pid_t ___waitpid(pid_t, int *, int); 131 int __accept(int, struct sockaddr *, socklen_t *); 132 int __aio_suspend(const struct aiocb * const iocbs[], int, 133 const struct timespec *); 134 int __close(int); 135 int __connect(int, const struct sockaddr *, socklen_t); 136 int __fcntl(int, int,...); 137 #ifdef SYSCALL_COMPAT 138 extern int __fcntl_compat(int, int,...); 139 #endif 140 int __fsync(int); 141 int __msync(void *, size_t, int); 142 int __nanosleep(const struct timespec *, struct timespec *); 143 int __open(const char *, int,...); 144 int __openat(int, const char *, int,...); 145 int __poll(struct pollfd *, unsigned int, int); 146 ssize_t __read(int, void *buf, size_t); 147 ssize_t __readv(int, const struct iovec *, int); 148 ssize_t __recvfrom(int, void *, size_t, int f, struct sockaddr *, socklen_t *); 149 ssize_t __recvmsg(int, struct msghdr *, int); 150 int __select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 151 ssize_t __sendmsg(int, const struct msghdr *, int); 152 ssize_t __sendto(int, const void *, size_t, int, 153 const struct sockaddr *, socklen_t); 154 pid_t __wait3(int *, int, struct rusage *); 155 pid_t __wait4(pid_t, int *, int, struct rusage *); 156 ssize_t __write(int, const void *, size_t); 157 ssize_t __writev(int, const struct iovec *, int); 158 159 __weak_reference(__accept, accept); 160 161 /* 162 * Cancellation behavior: 163 * If thread is canceled, no socket is created. 164 */ 165 int 166 __accept(int s, struct sockaddr *addr, socklen_t *addrlen) 167 { 168 struct pthread *curthread; 169 int ret; 170 171 curthread = _get_curthread(); 172 _thr_cancel_enter(curthread); 173 ret = __sys_accept(s, addr, addrlen); 174 _thr_cancel_leave(curthread, ret == -1); 175 176 return (ret); 177 } 178 179 __weak_reference(__aio_suspend, aio_suspend); 180 181 int 182 __aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct 183 timespec *timeout) 184 { 185 struct pthread *curthread = _get_curthread(); 186 int ret; 187 188 _thr_cancel_enter(curthread); 189 ret = __sys_aio_suspend(iocbs, niocb, timeout); 190 _thr_cancel_leave(curthread, 1); 191 192 return (ret); 193 } 194 195 __weak_reference(__close, close); 196 197 /* 198 * Cancellation behavior: 199 * According to manual of close(), the file descriptor is always deleted. 200 * Here, thread is only canceled after the system call, so the file 201 * descriptor is always deleted despite whether the thread is canceled 202 * or not. 203 */ 204 int 205 __close(int fd) 206 { 207 struct pthread *curthread = _get_curthread(); 208 int ret; 209 210 _thr_cancel_enter2(curthread, 0); 211 ret = __sys_close(fd); 212 _thr_cancel_leave(curthread, 1); 213 214 return (ret); 215 } 216 217 __weak_reference(__connect, connect); 218 219 /* 220 * Cancellation behavior: 221 * If the thread is canceled, connection is not made. 222 */ 223 int 224 __connect(int fd, const struct sockaddr *name, socklen_t namelen) 225 { 226 struct pthread *curthread = _get_curthread(); 227 int ret; 228 229 _thr_cancel_enter(curthread); 230 ret = __sys_connect(fd, name, namelen); 231 _thr_cancel_leave(curthread, ret == -1); 232 233 return (ret); 234 } 235 236 __weak_reference(___creat, creat); 237 238 /* 239 * Cancellation behavior: 240 * If thread is canceled, file is not created. 241 */ 242 int 243 ___creat(const char *path, mode_t mode) 244 { 245 struct pthread *curthread = _get_curthread(); 246 int ret; 247 248 _thr_cancel_enter(curthread); 249 ret = __creat(path, mode); 250 _thr_cancel_leave(curthread, ret == -1); 251 252 return ret; 253 } 254 255 __weak_reference(__fcntl, fcntl); 256 257 /* 258 * Cancellation behavior: 259 * According to specification, only F_SETLKW is a cancellation point. 260 * Thread is only canceled at start, or canceled if the system call 261 * is failure, this means the function does not generate side effect 262 * if it is canceled. 263 */ 264 int 265 __fcntl(int fd, int cmd,...) 266 { 267 struct pthread *curthread = _get_curthread(); 268 int ret; 269 va_list ap; 270 271 va_start(ap, cmd); 272 if (cmd == F_OSETLKW || cmd == F_SETLKW) { 273 _thr_cancel_enter(curthread); 274 #ifdef SYSCALL_COMPAT 275 ret = __fcntl_compat(fd, cmd, va_arg(ap, void *)); 276 #else 277 ret = __sys_fcntl(fd, cmd, va_arg(ap, void *)); 278 #endif 279 _thr_cancel_leave(curthread, ret == -1); 280 } else { 281 #ifdef SYSCALL_COMPAT 282 ret = __fcntl_compat(fd, cmd, va_arg(ap, void *)); 283 #else 284 ret = __sys_fcntl(fd, cmd, va_arg(ap, void *)); 285 #endif 286 } 287 va_end(ap); 288 289 return (ret); 290 } 291 292 __weak_reference(__fsync, fsync); 293 294 /* 295 * Cancellation behavior: 296 * Thread may be canceled after system call. 297 */ 298 int 299 __fsync(int fd) 300 { 301 struct pthread *curthread = _get_curthread(); 302 int ret; 303 304 _thr_cancel_enter2(curthread, 0); 305 ret = __sys_fsync(fd); 306 _thr_cancel_leave(curthread, 1); 307 308 return (ret); 309 } 310 311 __weak_reference(__msync, msync); 312 313 /* 314 * Cancellation behavior: 315 * Thread may be canceled after system call. 316 */ 317 int 318 __msync(void *addr, size_t len, int flags) 319 { 320 struct pthread *curthread = _get_curthread(); 321 int ret; 322 323 _thr_cancel_enter2(curthread, 0); 324 ret = __sys_msync(addr, len, flags); 325 _thr_cancel_leave(curthread, 1); 326 327 return ret; 328 } 329 330 __weak_reference(__nanosleep, nanosleep); 331 332 int 333 __nanosleep(const struct timespec *time_to_sleep, 334 struct timespec *time_remaining) 335 { 336 struct pthread *curthread = _get_curthread(); 337 int ret; 338 339 _thr_cancel_enter(curthread); 340 ret = __sys_nanosleep(time_to_sleep, time_remaining); 341 _thr_cancel_leave(curthread, 1); 342 343 return (ret); 344 } 345 346 __weak_reference(__open, open); 347 348 /* 349 * Cancellation behavior: 350 * If the thread is canceled, file is not opened. 351 */ 352 int 353 __open(const char *path, int flags,...) 354 { 355 struct pthread *curthread = _get_curthread(); 356 int ret; 357 int mode = 0; 358 va_list ap; 359 360 /* Check if the file is being created: */ 361 if (flags & O_CREAT) { 362 /* Get the creation mode: */ 363 va_start(ap, flags); 364 mode = va_arg(ap, int); 365 va_end(ap); 366 } 367 368 _thr_cancel_enter(curthread); 369 ret = __sys_open(path, flags, mode); 370 _thr_cancel_leave(curthread, ret == -1); 371 372 return ret; 373 } 374 375 __weak_reference(__openat, openat); 376 377 /* 378 * Cancellation behavior: 379 * If the thread is canceled, file is not opened. 380 */ 381 int 382 __openat(int fd, const char *path, int flags, ...) 383 { 384 struct pthread *curthread = _get_curthread(); 385 int ret; 386 int mode = 0; 387 va_list ap; 388 389 390 /* Check if the file is being created: */ 391 if (flags & O_CREAT) { 392 /* Get the creation mode: */ 393 va_start(ap, flags); 394 mode = va_arg(ap, int); 395 va_end(ap); 396 } 397 398 _thr_cancel_enter(curthread); 399 ret = __sys_openat(fd, path, flags, mode); 400 _thr_cancel_leave(curthread, ret == -1); 401 402 return ret; 403 } 404 405 __weak_reference(__poll, poll); 406 407 /* 408 * Cancellation behavior: 409 * Thread may be canceled at start, but if the system call returns something, 410 * the thread is not canceled. 411 */ 412 int 413 __poll(struct pollfd *fds, unsigned int nfds, int timeout) 414 { 415 struct pthread *curthread = _get_curthread(); 416 int ret; 417 418 _thr_cancel_enter(curthread); 419 ret = __sys_poll(fds, nfds, timeout); 420 _thr_cancel_leave(curthread, ret == -1); 421 422 return ret; 423 } 424 425 __weak_reference(___pselect, pselect); 426 427 /* 428 * Cancellation behavior: 429 * Thread may be canceled at start, but if the system call returns something, 430 * the thread is not canceled. 431 */ 432 int 433 ___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, 434 const struct timespec *timo, const sigset_t *mask) 435 { 436 struct pthread *curthread = _get_curthread(); 437 int ret; 438 439 _thr_cancel_enter(curthread); 440 ret = __sys_pselect(count, rfds, wfds, efds, timo, mask); 441 _thr_cancel_leave(curthread, ret == -1); 442 443 return (ret); 444 } 445 446 __weak_reference(__read, read); 447 448 /* 449 * Cancellation behavior: 450 * Thread may be canceled at start, but if the system call got some data, 451 * the thread is not canceled. 452 */ 453 ssize_t 454 __read(int fd, void *buf, size_t nbytes) 455 { 456 struct pthread *curthread = _get_curthread(); 457 ssize_t ret; 458 459 _thr_cancel_enter(curthread); 460 ret = __sys_read(fd, buf, nbytes); 461 _thr_cancel_leave(curthread, ret == -1); 462 463 return ret; 464 } 465 466 __weak_reference(__readv, readv); 467 468 /* 469 * Cancellation behavior: 470 * Thread may be canceled at start, but if the system call got some data, 471 * the thread is not canceled. 472 */ 473 ssize_t 474 __readv(int fd, const struct iovec *iov, int iovcnt) 475 { 476 struct pthread *curthread = _get_curthread(); 477 ssize_t ret; 478 479 _thr_cancel_enter(curthread); 480 ret = __sys_readv(fd, iov, iovcnt); 481 _thr_cancel_leave(curthread, ret == -1); 482 return ret; 483 } 484 485 __weak_reference(__recvfrom, recvfrom); 486 487 /* 488 * Cancellation behavior: 489 * Thread may be canceled at start, but if the system call got some data, 490 * the thread is not canceled. 491 */ 492 ssize_t 493 __recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from, 494 socklen_t *fl) 495 { 496 struct pthread *curthread = _get_curthread(); 497 ssize_t ret; 498 499 _thr_cancel_enter(curthread); 500 ret = __sys_recvfrom(s, b, l, f, from, fl); 501 _thr_cancel_leave(curthread, ret == -1); 502 return (ret); 503 } 504 505 __weak_reference(__recvmsg, recvmsg); 506 507 /* 508 * Cancellation behavior: 509 * Thread may be canceled at start, but if the system call got some data, 510 * the thread is not canceled. 511 */ 512 ssize_t 513 __recvmsg(int s, struct msghdr *m, int f) 514 { 515 struct pthread *curthread = _get_curthread(); 516 ssize_t ret; 517 518 _thr_cancel_enter(curthread); 519 ret = __sys_recvmsg(s, m, f); 520 _thr_cancel_leave(curthread, ret == -1); 521 return (ret); 522 } 523 524 __weak_reference(__select, select); 525 526 /* 527 * Cancellation behavior: 528 * Thread may be canceled at start, but if the system call returns something, 529 * the thread is not canceled. 530 */ 531 int 532 __select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, 533 struct timeval *timeout) 534 { 535 struct pthread *curthread = _get_curthread(); 536 int ret; 537 538 _thr_cancel_enter(curthread); 539 ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout); 540 _thr_cancel_leave(curthread, ret == -1); 541 return ret; 542 } 543 544 __weak_reference(__sendmsg, sendmsg); 545 546 /* 547 * Cancellation behavior: 548 * Thread may be canceled at start, but if the system call sent 549 * data, the thread is not canceled. 550 */ 551 ssize_t 552 __sendmsg(int s, const struct msghdr *m, int f) 553 { 554 struct pthread *curthread = _get_curthread(); 555 ssize_t ret; 556 557 _thr_cancel_enter(curthread); 558 ret = __sys_sendmsg(s, m, f); 559 _thr_cancel_leave(curthread, ret <= 0); 560 return (ret); 561 } 562 563 __weak_reference(__sendto, sendto); 564 565 /* 566 * Cancellation behavior: 567 * Thread may be canceled at start, but if the system call sent some 568 * data, the thread is not canceled. 569 */ 570 ssize_t 571 __sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t, 572 socklen_t tl) 573 { 574 struct pthread *curthread = _get_curthread(); 575 ssize_t ret; 576 577 _thr_cancel_enter(curthread); 578 ret = __sys_sendto(s, m, l, f, t, tl); 579 _thr_cancel_leave(curthread, ret <= 0); 580 return (ret); 581 } 582 583 __weak_reference(___sleep, sleep); 584 585 unsigned int 586 ___sleep(unsigned int seconds) 587 { 588 struct pthread *curthread = _get_curthread(); 589 unsigned int ret; 590 591 _thr_cancel_enter(curthread); 592 ret = __sleep(seconds); 593 _thr_cancel_leave(curthread, 1); 594 595 return (ret); 596 } 597 598 __weak_reference(___system, system); 599 600 int 601 ___system(const char *string) 602 { 603 struct pthread *curthread = _get_curthread(); 604 int ret; 605 606 _thr_cancel_enter(curthread); 607 ret = __system(string); 608 _thr_cancel_leave(curthread, 1); 609 610 return ret; 611 } 612 613 __weak_reference(___tcdrain, tcdrain); 614 615 /* 616 * Cancellation behavior: 617 * If thread is canceled, the system call is not completed, 618 * this means not all bytes were drained. 619 */ 620 int 621 ___tcdrain(int fd) 622 { 623 struct pthread *curthread = _get_curthread(); 624 int ret; 625 626 _thr_cancel_enter(curthread); 627 ret = __tcdrain(fd); 628 _thr_cancel_leave(curthread, ret == -1); 629 return (ret); 630 } 631 632 __weak_reference(___usleep, usleep); 633 634 int 635 ___usleep(useconds_t useconds) 636 { 637 struct pthread *curthread = _get_curthread(); 638 int ret; 639 640 _thr_cancel_enter(curthread); 641 ret = __usleep(useconds); 642 _thr_cancel_leave(curthread, 1); 643 644 return (ret); 645 } 646 647 __weak_reference(___wait, wait); 648 649 /* 650 * Cancellation behavior: 651 * Thread may be canceled at start, but if the system call returns 652 * a child pid, the thread is not canceled. 653 */ 654 pid_t 655 ___wait(int *istat) 656 { 657 struct pthread *curthread = _get_curthread(); 658 pid_t ret; 659 660 _thr_cancel_enter(curthread); 661 ret = __wait(istat); 662 _thr_cancel_leave(curthread, ret <= 0); 663 664 return ret; 665 } 666 667 __weak_reference(__wait3, wait3); 668 669 /* 670 * Cancellation behavior: 671 * Thread may be canceled at start, but if the system call returns 672 * a child pid, the thread is not canceled. 673 */ 674 pid_t 675 __wait3(int *status, int options, struct rusage *rusage) 676 { 677 struct pthread *curthread = _get_curthread(); 678 pid_t ret; 679 680 _thr_cancel_enter(curthread); 681 ret = _wait4(WAIT_ANY, status, options, rusage); 682 _thr_cancel_leave(curthread, ret <= 0); 683 684 return (ret); 685 } 686 687 __weak_reference(__wait4, wait4); 688 689 /* 690 * Cancellation behavior: 691 * Thread may be canceled at start, but if the system call returns 692 * a child pid, the thread is not canceled. 693 */ 694 pid_t 695 __wait4(pid_t pid, int *status, int options, struct rusage *rusage) 696 { 697 struct pthread *curthread = _get_curthread(); 698 pid_t ret; 699 700 _thr_cancel_enter(curthread); 701 ret = __sys_wait4(pid, status, options, rusage); 702 _thr_cancel_leave(curthread, ret <= 0); 703 704 return ret; 705 } 706 707 __weak_reference(___waitpid, waitpid); 708 709 /* 710 * Cancellation behavior: 711 * Thread may be canceled at start, but if the system call returns 712 * a child pid, the thread is not canceled. 713 */ 714 pid_t 715 ___waitpid(pid_t wpid, int *status, int options) 716 { 717 struct pthread *curthread = _get_curthread(); 718 pid_t ret; 719 720 _thr_cancel_enter(curthread); 721 ret = __waitpid(wpid, status, options); 722 _thr_cancel_leave(curthread, ret <= 0); 723 724 return ret; 725 } 726 727 __weak_reference(__write, write); 728 729 /* 730 * Cancellation behavior: 731 * Thread may be canceled at start, but if the thread wrote some data, 732 * it is not canceled. 733 */ 734 ssize_t 735 __write(int fd, const void *buf, size_t nbytes) 736 { 737 struct pthread *curthread = _get_curthread(); 738 ssize_t ret; 739 740 _thr_cancel_enter(curthread); 741 ret = __sys_write(fd, buf, nbytes); 742 _thr_cancel_leave(curthread, (ret <= 0)); 743 return ret; 744 } 745 746 __weak_reference(__writev, writev); 747 748 /* 749 * Cancellation behavior: 750 * Thread may be canceled at start, but if the thread wrote some data, 751 * it is not canceled. 752 */ 753 ssize_t 754 __writev(int fd, const struct iovec *iov, int iovcnt) 755 { 756 struct pthread *curthread = _get_curthread(); 757 ssize_t ret; 758 759 _thr_cancel_enter(curthread); 760 ret = __sys_writev(fd, iov, iovcnt); 761 _thr_cancel_leave(curthread, (ret <= 0)); 762 return ret; 763 } 764