thr_syscalls.c revision 211524
190792Sgshapiro/* 290792Sgshapiro * Copyright (C) 2005 David Xu <davidxu@freebsd.org>. 3261363Sgshapiro * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>. 490792Sgshapiro * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>. 590792Sgshapiro * All rights reserved. 690792Sgshapiro * 790792Sgshapiro * Redistribution and use in source and binary forms, with or without 890792Sgshapiro * modification, are permitted provided that the following conditions 990792Sgshapiro * are met: 1090792Sgshapiro * 1. Redistributions of source code must retain the above copyright 1190792Sgshapiro * notice(s), this list of conditions and the following disclaimer as 1290792Sgshapiro * the first lines of this file unmodified other than the possible 1390792Sgshapiro * addition of one or more copyright notices. 1490792Sgshapiro * 2. Redistributions in binary form must reproduce the above copyright 1590792Sgshapiro * notice(s), this list of conditions and the following disclaimer in 1690792Sgshapiro * the documentation and/or other materials provided with the 1790792Sgshapiro * distribution. 1890792Sgshapiro * 1990792Sgshapiro * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 2090792Sgshapiro * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2190792Sgshapiro * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2290792Sgshapiro * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE 2390792Sgshapiro * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2490792Sgshapiro * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2590792Sgshapiro * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 2690792Sgshapiro * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 2790792Sgshapiro * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 2890792Sgshapiro * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 2990792Sgshapiro * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3090792Sgshapiro * 3190792Sgshapiro * $FreeBSD: head/lib/libthr/thread/thr_syscalls.c 211524 2010-08-20 05:15:39Z davidxu $ 3290792Sgshapiro */ 3390792Sgshapiro 3490792Sgshapiro/* 3590792Sgshapiro * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 3690792Sgshapiro * All rights reserved. 3790792Sgshapiro * 3890792Sgshapiro * Redistribution and use in source and binary forms, with or without 3990792Sgshapiro * modification, are permitted provided that the following conditions 4098121Sgshapiro * are met: 4190792Sgshapiro * 1. Redistributions of source code must retain the above copyright 4290792Sgshapiro * notice, this list of conditions and the following disclaimer. 4390792Sgshapiro * 2. Redistributions in binary form must reproduce the above copyright 4490792Sgshapiro * notice, this list of conditions and the following disclaimer in the 4590792Sgshapiro * documentation and/or other materials provided with the distribution. 4690792Sgshapiro * 3. Neither the name of the author nor the names of any co-contributors 4790792Sgshapiro * may be used to endorse or promote products derived from this software 4890792Sgshapiro * without specific prior written permission. 4990792Sgshapiro * 5090792Sgshapiro * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 5190792Sgshapiro * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5290792Sgshapiro * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5398121Sgshapiro * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 5490792Sgshapiro * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5590792Sgshapiro * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5690792Sgshapiro * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5790792Sgshapiro * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5890792Sgshapiro * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5990792Sgshapiro * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6090792Sgshapiro * SUCH DAMAGE. 6190792Sgshapiro * 62266692Sgshapiro */ 6390792Sgshapiro 6490792Sgshapiro#include "namespace.h" 6590792Sgshapiro#include <sys/types.h> 6690792Sgshapiro#include <sys/mman.h> 6790792Sgshapiro#include <sys/param.h> 6890792Sgshapiro#include <sys/select.h> 6990792Sgshapiro#include <sys/signalvar.h> 7090792Sgshapiro#include <sys/socket.h> 7190792Sgshapiro#include <sys/stat.h> 7290792Sgshapiro#include <sys/time.h> 7390792Sgshapiro#include <sys/uio.h> 7498121Sgshapiro#include <sys/wait.h> 7590792Sgshapiro#include <aio.h> 7690792Sgshapiro#include <dirent.h> 7790792Sgshapiro#include <errno.h> 7890792Sgshapiro#include <fcntl.h> 7990792Sgshapiro#include <poll.h> 8090792Sgshapiro#include <signal.h> 8190792Sgshapiro#include <stdarg.h> 8290792Sgshapiro#include <stdio.h> 8390792Sgshapiro#include <stdlib.h> 8490792Sgshapiro#include <string.h> 8590792Sgshapiro#include <termios.h> 8690792Sgshapiro#include <unistd.h> 8790792Sgshapiro#include <pthread.h> 88157001Sgshapiro#include "un-namespace.h" 8990792Sgshapiro 9090792Sgshapiro#include "thr_private.h" 9190792Sgshapiro 9290792Sgshapiroextern int __creat(const char *, mode_t); 9390792Sgshapiroextern int __pselect(int, fd_set *, fd_set *, fd_set *, 9490792Sgshapiro const struct timespec *, const sigset_t *); 95extern unsigned __sleep(unsigned int); 96extern int __system(const char *); 97extern int __tcdrain(int); 98extern int __usleep(useconds_t); 99extern pid_t __wait(int *); 100extern pid_t __waitpid(pid_t, int *, int); 101extern int __sys_aio_suspend(const struct aiocb * const[], int, 102 const struct timespec *); 103extern int __sys_accept(int, struct sockaddr *, socklen_t *); 104extern int __sys_connect(int, const struct sockaddr *, socklen_t); 105extern int __sys_fsync(int); 106extern int __sys_msync(void *, size_t, int); 107extern int __sys_pselect(int, fd_set *, fd_set *, fd_set *, 108 const struct timespec *, const sigset_t *); 109extern int __sys_poll(struct pollfd *, unsigned, int); 110extern ssize_t __sys_recv(int, void *, size_t, int); 111extern ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); 112extern ssize_t __sys_recvmsg(int, struct msghdr *, int); 113extern int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 114extern int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, 115 off_t *, int); 116extern ssize_t __sys_sendmsg(int, const struct msghdr *, int); 117extern ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t); 118extern ssize_t __sys_readv(int, const struct iovec *, int); 119extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *); 120extern ssize_t __sys_writev(int, const struct iovec *, int); 121 122int ___creat(const char *, mode_t); 123int ___pselect(int, fd_set *, fd_set *, fd_set *, 124 const struct timespec *, const sigset_t *); 125unsigned ___sleep(unsigned); 126int ___system(const char *); 127int ___tcdrain(int); 128int ___usleep(useconds_t useconds); 129pid_t ___wait(int *); 130pid_t ___waitpid(pid_t, int *, int); 131int __accept(int, struct sockaddr *, socklen_t *); 132int __aio_suspend(const struct aiocb * const iocbs[], int, 133 const struct timespec *); 134int __close(int); 135int __connect(int, const struct sockaddr *, socklen_t); 136int __fcntl(int, int,...); 137#ifdef SYSCALL_COMPAT 138extern int __fcntl_compat(int, int,...); 139#endif 140int __fsync(int); 141int __msync(void *, size_t, int); 142int __nanosleep(const struct timespec *, struct timespec *); 143int __open(const char *, int,...); 144int __openat(int, const char *, int,...); 145int __poll(struct pollfd *, unsigned int, int); 146ssize_t __read(int, void *buf, size_t); 147ssize_t __readv(int, const struct iovec *, int); 148ssize_t __recvfrom(int, void *, size_t, int f, struct sockaddr *, socklen_t *); 149ssize_t __recvmsg(int, struct msghdr *, int); 150int __select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 151ssize_t __sendmsg(int, const struct msghdr *, int); 152ssize_t __sendto(int, const void *, size_t, int, 153 const struct sockaddr *, socklen_t); 154pid_t __wait3(int *, int, struct rusage *); 155pid_t __wait4(pid_t, int *, int, struct rusage *); 156ssize_t __write(int, const void *, size_t); 157ssize_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 */ 165int 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_defer(curthread, 1); 173 ret = __sys_accept(s, addr, addrlen); 174 _thr_cancel_leave_defer(curthread, ret == -1); 175 176 return (ret); 177} 178 179__weak_reference(__aio_suspend, aio_suspend); 180 181int 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); 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 */ 204int 205__close(int fd) 206{ 207 struct pthread *curthread = _get_curthread(); 208 int ret; 209 210 _thr_cancel_enter_defer(curthread, 0); 211 ret = __sys_close(fd); 212 _thr_cancel_leave_defer(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 */ 223int 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_defer(curthread, 0); 230 ret = __sys_connect(fd, name, namelen); 231 _thr_cancel_leave_defer(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 */ 242int 243___creat(const char *path, mode_t mode) 244{ 245 struct pthread *curthread = _get_curthread(); 246 int ret; 247 248 _thr_cancel_enter_defer(curthread, 1); 249 ret = __creat(path, mode); 250 _thr_cancel_leave_defer(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 */ 264int 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 switch (cmd) { 273 case F_DUPFD: 274 case F_DUP2FD: 275 ret = __sys_fcntl(fd, cmd, va_arg(ap, int)); 276 break; 277 case F_SETFD: 278 case F_SETFL: 279 ret = __sys_fcntl(fd, cmd, va_arg(ap, int)); 280 break; 281 case F_GETFD: 282 case F_GETFL: 283 ret = __sys_fcntl(fd, cmd); 284 break; 285 case F_OSETLKW: 286 case F_SETLKW: 287 _thr_cancel_enter_defer(curthread, 1); 288#ifdef SYSCALL_COMPAT 289 ret = __fcntl_compat(fd, cmd, va_arg(ap, void *)); 290#else 291 ret = __sys_fcntl(fd, cmd, va_arg(ap, void *)); 292#endif 293 _thr_cancel_leave_defer(curthread, ret == -1); 294 break; 295 default: 296#ifdef SYSCALL_COMPAT 297 ret = __fcntl_compat(fd, cmd, va_arg(ap, void *)); 298#else 299 ret = __sys_fcntl(fd, cmd, va_arg(ap, void *)); 300#endif 301 } 302 va_end(ap); 303 304 return (ret); 305} 306 307__weak_reference(__fsync, fsync); 308 309/* 310 * Cancellation behavior: 311 * Thread may be canceled after system call. 312 */ 313int 314__fsync(int fd) 315{ 316 struct pthread *curthread = _get_curthread(); 317 int ret; 318 319 _thr_cancel_enter_defer(curthread, 0); 320 ret = __sys_fsync(fd); 321 _thr_cancel_leave_defer(curthread, 1); 322 323 return (ret); 324} 325 326__weak_reference(__msync, msync); 327 328/* 329 * Cancellation behavior: 330 * Thread may be canceled after system call. 331 */ 332int 333__msync(void *addr, size_t len, int flags) 334{ 335 struct pthread *curthread = _get_curthread(); 336 int ret; 337 338 _thr_cancel_enter_defer(curthread, 0); 339 ret = __sys_msync(addr, len, flags); 340 _thr_cancel_leave_defer(curthread, 1); 341 342 return ret; 343} 344 345__weak_reference(__nanosleep, nanosleep); 346 347int 348__nanosleep(const struct timespec *time_to_sleep, 349 struct timespec *time_remaining) 350{ 351 struct pthread *curthread = _get_curthread(); 352 int ret; 353 354 _thr_cancel_enter(curthread); 355 ret = __sys_nanosleep(time_to_sleep, time_remaining); 356 _thr_cancel_leave(curthread); 357 358 return (ret); 359} 360 361__weak_reference(__open, open); 362 363/* 364 * Cancellation behavior: 365 * If the thread is canceled, file is not opened. 366 */ 367int 368__open(const char *path, int flags,...) 369{ 370 struct pthread *curthread = _get_curthread(); 371 int ret; 372 int mode = 0; 373 va_list ap; 374 375 /* Check if the file is being created: */ 376 if (flags & O_CREAT) { 377 /* Get the creation mode: */ 378 va_start(ap, flags); 379 mode = va_arg(ap, int); 380 va_end(ap); 381 } 382 383 _thr_cancel_enter_defer(curthread, 1); 384 ret = __sys_open(path, flags, mode); 385 _thr_cancel_leave_defer(curthread, ret == -1); 386 387 return ret; 388} 389 390__weak_reference(__openat, openat); 391 392/* 393 * Cancellation behavior: 394 * If the thread is canceled, file is not opened. 395 */ 396int 397__openat(int fd, const char *path, int flags, ...) 398{ 399 struct pthread *curthread = _get_curthread(); 400 int ret; 401 int mode = 0; 402 va_list ap; 403 404 405 /* Check if the file is being created: */ 406 if (flags & O_CREAT) { 407 /* Get the creation mode: */ 408 va_start(ap, flags); 409 mode = va_arg(ap, int); 410 va_end(ap); 411 } 412 413 _thr_cancel_enter_defer(curthread, 1); 414 ret = __sys_openat(fd, path, flags, mode); 415 _thr_cancel_leave_defer(curthread, ret == -1); 416 417 return ret; 418} 419 420__weak_reference(__poll, poll); 421 422/* 423 * Cancellation behavior: 424 * Thread may be canceled at start, but if the system call returns something, 425 * the thread is not canceled. 426 */ 427int 428__poll(struct pollfd *fds, unsigned int nfds, int timeout) 429{ 430 struct pthread *curthread = _get_curthread(); 431 int ret; 432 433 _thr_cancel_enter_defer(curthread, 1); 434 ret = __sys_poll(fds, nfds, timeout); 435 _thr_cancel_leave_defer(curthread, ret == -1); 436 437 return ret; 438} 439 440__weak_reference(___pselect, pselect); 441 442/* 443 * Cancellation behavior: 444 * Thread may be canceled at start, but if the system call returns something, 445 * the thread is not canceled. 446 */ 447int 448___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, 449 const struct timespec *timo, const sigset_t *mask) 450{ 451 struct pthread *curthread = _get_curthread(); 452 int ret; 453 454 _thr_cancel_enter_defer(curthread, 1); 455 ret = __sys_pselect(count, rfds, wfds, efds, timo, mask); 456 _thr_cancel_leave_defer(curthread, ret == -1); 457 458 return (ret); 459} 460 461__weak_reference(__read, read); 462 463/* 464 * Cancellation behavior: 465 * Thread may be canceled at start, but if the system call got some data, 466 * the thread is not canceled. 467 */ 468ssize_t 469__read(int fd, void *buf, size_t nbytes) 470{ 471 struct pthread *curthread = _get_curthread(); 472 ssize_t ret; 473 474 _thr_cancel_enter_defer(curthread, 1); 475 ret = __sys_read(fd, buf, nbytes); 476 _thr_cancel_leave_defer(curthread, ret == -1); 477 478 return ret; 479} 480 481__weak_reference(__readv, readv); 482 483/* 484 * Cancellation behavior: 485 * Thread may be canceled at start, but if the system call got some data, 486 * the thread is not canceled. 487 */ 488ssize_t 489__readv(int fd, const struct iovec *iov, int iovcnt) 490{ 491 struct pthread *curthread = _get_curthread(); 492 ssize_t ret; 493 494 _thr_cancel_enter_defer(curthread, 1); 495 ret = __sys_readv(fd, iov, iovcnt); 496 _thr_cancel_leave_defer(curthread, ret == -1); 497 return ret; 498} 499 500__weak_reference(__recvfrom, recvfrom); 501 502/* 503 * Cancellation behavior: 504 * Thread may be canceled at start, but if the system call got some data, 505 * the thread is not canceled. 506 */ 507ssize_t 508__recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from, 509 socklen_t *fl) 510{ 511 struct pthread *curthread = _get_curthread(); 512 ssize_t ret; 513 514 _thr_cancel_enter_defer(curthread, 1); 515 ret = __sys_recvfrom(s, b, l, f, from, fl); 516 _thr_cancel_leave_defer(curthread, ret == -1); 517 return (ret); 518} 519 520__weak_reference(__recvmsg, recvmsg); 521 522/* 523 * Cancellation behavior: 524 * Thread may be canceled at start, but if the system call got some data, 525 * the thread is not canceled. 526 */ 527ssize_t 528__recvmsg(int s, struct msghdr *m, int f) 529{ 530 struct pthread *curthread = _get_curthread(); 531 ssize_t ret; 532 533 _thr_cancel_enter_defer(curthread, 1); 534 ret = __sys_recvmsg(s, m, f); 535 _thr_cancel_leave_defer(curthread, ret == -1); 536 return (ret); 537} 538 539__weak_reference(__select, select); 540 541/* 542 * Cancellation behavior: 543 * Thread may be canceled at start, but if the system call returns something, 544 * the thread is not canceled. 545 */ 546int 547__select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, 548 struct timeval *timeout) 549{ 550 struct pthread *curthread = _get_curthread(); 551 int ret; 552 553 _thr_cancel_enter_defer(curthread, 1); 554 ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout); 555 _thr_cancel_leave_defer(curthread, ret == -1); 556 return ret; 557} 558 559__weak_reference(__sendmsg, sendmsg); 560 561/* 562 * Cancellation behavior: 563 * Thread may be canceled at start, but if the system call sent 564 * data, the thread is not canceled. 565 */ 566ssize_t 567__sendmsg(int s, const struct msghdr *m, int f) 568{ 569 struct pthread *curthread = _get_curthread(); 570 ssize_t ret; 571 572 _thr_cancel_enter_defer(curthread, 1); 573 ret = __sys_sendmsg(s, m, f); 574 _thr_cancel_leave_defer(curthread, ret <= 0); 575 return (ret); 576} 577 578__weak_reference(__sendto, sendto); 579 580/* 581 * Cancellation behavior: 582 * Thread may be canceled at start, but if the system call sent some 583 * data, the thread is not canceled. 584 */ 585ssize_t 586__sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t, 587 socklen_t tl) 588{ 589 struct pthread *curthread = _get_curthread(); 590 ssize_t ret; 591 592 _thr_cancel_enter_defer(curthread, 1); 593 ret = __sys_sendto(s, m, l, f, t, tl); 594 _thr_cancel_leave_defer(curthread, ret <= 0); 595 return (ret); 596} 597 598__weak_reference(___sleep, sleep); 599 600unsigned int 601___sleep(unsigned int seconds) 602{ 603 struct pthread *curthread = _get_curthread(); 604 unsigned int ret; 605 606 _thr_cancel_enter(curthread); 607 ret = __sleep(seconds); 608 _thr_cancel_leave(curthread); 609 610 return (ret); 611} 612 613__weak_reference(___system, system); 614 615int 616___system(const char *string) 617{ 618 struct pthread *curthread = _get_curthread(); 619 int ret; 620 621 _thr_cancel_enter(curthread); 622 ret = __system(string); 623 _thr_cancel_leave(curthread); 624 625 return ret; 626} 627 628__weak_reference(___tcdrain, tcdrain); 629 630/* 631 * Cancellation behavior: 632 * If thread is canceled, the system call is not completed, 633 * this means not all bytes were drained. 634 */ 635int 636___tcdrain(int fd) 637{ 638 struct pthread *curthread = _get_curthread(); 639 int ret; 640 641 _thr_cancel_enter_defer(curthread, 1); 642 ret = __tcdrain(fd); 643 _thr_cancel_leave_defer(curthread, ret == -1); 644 return (ret); 645} 646 647__weak_reference(___usleep, usleep); 648 649int 650___usleep(useconds_t useconds) 651{ 652 struct pthread *curthread = _get_curthread(); 653 int ret; 654 655 _thr_cancel_enter(curthread); 656 ret = __usleep(useconds); 657 _thr_cancel_leave(curthread); 658 659 return (ret); 660} 661 662__weak_reference(___wait, wait); 663 664/* 665 * Cancellation behavior: 666 * Thread may be canceled at start, but if the system call returns 667 * a child pid, the thread is not canceled. 668 */ 669pid_t 670___wait(int *istat) 671{ 672 struct pthread *curthread = _get_curthread(); 673 pid_t ret; 674 675 _thr_cancel_enter_defer(curthread, 1); 676 ret = __wait(istat); 677 _thr_cancel_leave_defer(curthread, ret <= 0); 678 679 return ret; 680} 681 682__weak_reference(__wait3, wait3); 683 684/* 685 * Cancellation behavior: 686 * Thread may be canceled at start, but if the system call returns 687 * a child pid, the thread is not canceled. 688 */ 689pid_t 690__wait3(int *status, int options, struct rusage *rusage) 691{ 692 struct pthread *curthread = _get_curthread(); 693 pid_t ret; 694 695 _thr_cancel_enter_defer(curthread, 1); 696 ret = _wait4(WAIT_ANY, status, options, rusage); 697 _thr_cancel_leave_defer(curthread, ret <= 0); 698 699 return (ret); 700} 701 702__weak_reference(__wait4, wait4); 703 704/* 705 * Cancellation behavior: 706 * Thread may be canceled at start, but if the system call returns 707 * a child pid, the thread is not canceled. 708 */ 709pid_t 710__wait4(pid_t pid, int *status, int options, struct rusage *rusage) 711{ 712 struct pthread *curthread = _get_curthread(); 713 pid_t ret; 714 715 _thr_cancel_enter_defer(curthread, 1); 716 ret = __sys_wait4(pid, status, options, rusage); 717 _thr_cancel_leave_defer(curthread, ret <= 0); 718 719 return ret; 720} 721 722__weak_reference(___waitpid, waitpid); 723 724/* 725 * Cancellation behavior: 726 * Thread may be canceled at start, but if the system call returns 727 * a child pid, the thread is not canceled. 728 */ 729pid_t 730___waitpid(pid_t wpid, int *status, int options) 731{ 732 struct pthread *curthread = _get_curthread(); 733 pid_t ret; 734 735 _thr_cancel_enter_defer(curthread, 1); 736 ret = __waitpid(wpid, status, options); 737 _thr_cancel_leave_defer(curthread, ret <= 0); 738 739 return ret; 740} 741 742__weak_reference(__write, write); 743 744/* 745 * Cancellation behavior: 746 * Thread may be canceled at start, but if the thread wrote some data, 747 * it is not canceled. 748 */ 749ssize_t 750__write(int fd, const void *buf, size_t nbytes) 751{ 752 struct pthread *curthread = _get_curthread(); 753 ssize_t ret; 754 755 _thr_cancel_enter_defer(curthread, 1); 756 ret = __sys_write(fd, buf, nbytes); 757 _thr_cancel_leave_defer(curthread, (ret <= 0)); 758 return ret; 759} 760 761__weak_reference(__writev, writev); 762 763/* 764 * Cancellation behavior: 765 * Thread may be canceled at start, but if the thread wrote some data, 766 * it is not canceled. 767 */ 768ssize_t 769__writev(int fd, const struct iovec *iov, int iovcnt) 770{ 771 struct pthread *curthread = _get_curthread(); 772 ssize_t ret; 773 774 _thr_cancel_enter_defer(curthread, 1); 775 ret = __sys_writev(fd, iov, iovcnt); 776 _thr_cancel_leave_defer(curthread, (ret <= 0)); 777 return ret; 778} 779