8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
695 lines
17 KiB
C
695 lines
17 KiB
C
/*
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* Copyright (c) 2014 The FreeBSD Foundation.
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* Copyright (C) 2005 David Xu <davidxu@freebsd.org>.
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* Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>.
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* Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
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* All rights reserved.
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*
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* Portions of this software were developed by Konstantin Belousov
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/select.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <aio.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <pthread.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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#include "thr_private.h"
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static int
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__thr_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_accept(s, addr, addrlen);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* If thread is canceled, no socket is created.
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*/
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static int
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__thr_accept4(int s, struct sockaddr *addr, socklen_t *addrlen, int flags)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_accept4(s, addr, addrlen, flags);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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static int
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__thr_aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
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timespec *timeout)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_aio_suspend(iocbs, niocb, timeout);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* According to manual of close(), the file descriptor is always deleted.
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* Here, thread is only canceled after the system call, so the file
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* descriptor is always deleted despite whether the thread is canceled
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* or not.
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*/
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static int
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__thr_close(int fd)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter2(curthread, 0);
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ret = __sys_close(fd);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* If the thread is canceled, connection is not made.
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*/
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static int
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__thr_connect(int fd, const struct sockaddr *name, socklen_t namelen)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_connect(fd, name, namelen);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* According to specification, only F_SETLKW is a cancellation point.
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* Thread is only canceled at start, or canceled if the system call
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* is failure, this means the function does not generate side effect
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* if it is canceled.
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*/
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static int
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__thr_fcntl(int fd, int cmd, ...)
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{
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struct pthread *curthread;
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int ret;
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va_list ap;
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curthread = _get_curthread();
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va_start(ap, cmd);
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if (cmd == F_OSETLKW || cmd == F_SETLKW) {
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_thr_cancel_enter(curthread);
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ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
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_thr_cancel_leave(curthread, ret == -1);
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} else {
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ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
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}
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va_end(ap);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled after system call.
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*/
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static int
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__thr_fsync(int fd)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter2(curthread, 0);
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ret = __sys_fsync(fd);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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static int
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__thr_fdatasync(int fd)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter2(curthread, 0);
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ret = __sys_fdatasync(fd);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled after system call.
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*/
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static int
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__thr_msync(void *addr, size_t len, int flags)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter2(curthread, 0);
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ret = __sys_msync(addr, len, flags);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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static int
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__thr_clock_nanosleep(clockid_t clock_id, int flags,
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const struct timespec *time_to_sleep, struct timespec *time_remaining)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_clock_nanosleep(clock_id, flags, time_to_sleep,
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time_remaining);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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static int
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__thr_nanosleep(const struct timespec *time_to_sleep,
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struct timespec *time_remaining)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_nanosleep(time_to_sleep, time_remaining);
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_thr_cancel_leave(curthread, 1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* If the thread is canceled, file is not opened.
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*/
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static int
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__thr_openat(int fd, const char *path, int flags, ...)
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{
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struct pthread *curthread;
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int mode, ret;
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va_list ap;
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/* Check if the file is being created: */
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if ((flags & O_CREAT) != 0) {
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/* Get the creation mode: */
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va_start(ap, flags);
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mode = va_arg(ap, int);
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va_end(ap);
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} else {
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mode = 0;
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}
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_openat(fd, path, flags, mode);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call returns something,
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* the thread is not canceled.
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*/
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static int
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__thr_poll(struct pollfd *fds, unsigned int nfds, int timeout)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_poll(fds, nfds, timeout);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call returns something,
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* the thread is not canceled.
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*/
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static int
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__thr_ppoll(struct pollfd pfd[], nfds_t nfds, const struct timespec *
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timeout, const sigset_t *newsigmask)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_ppoll(pfd, nfds, timeout, newsigmask);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call returns something,
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* the thread is not canceled.
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*/
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static int
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__thr_pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_pselect(count, rfds, wfds, efds, timo, mask);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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static int
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__thr_kevent(int kq, const struct kevent *changelist, int nchanges,
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struct kevent *eventlist, int nevents, const struct timespec *timeout)
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{
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struct pthread *curthread;
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int ret;
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if (nevents == 0) {
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/*
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* No blocking, do not make the call cancellable.
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*/
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return (__sys_kevent(kq, changelist, nchanges, eventlist,
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nevents, timeout));
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}
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_kevent(kq, changelist, nchanges, eventlist, nevents,
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timeout);
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_thr_cancel_leave(curthread, ret == -1 && nchanges == 0);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call got some data,
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* the thread is not canceled.
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*/
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static ssize_t
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__thr_read(int fd, void *buf, size_t nbytes)
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{
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struct pthread *curthread;
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ssize_t ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_read(fd, buf, nbytes);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call got some data,
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* the thread is not canceled.
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*/
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static ssize_t
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__thr_readv(int fd, const struct iovec *iov, int iovcnt)
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{
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struct pthread *curthread;
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ssize_t ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_readv(fd, iov, iovcnt);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call got some data,
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* the thread is not canceled.
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*/
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static ssize_t
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__thr_recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from,
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socklen_t *fl)
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{
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struct pthread *curthread;
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ssize_t ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_recvfrom(s, b, l, f, from, fl);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call got some data,
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* the thread is not canceled.
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*/
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static ssize_t
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__thr_recvmsg(int s, struct msghdr *m, int f)
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{
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struct pthread *curthread;
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ssize_t ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_recvmsg(s, m, f);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call returns something,
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* the thread is not canceled.
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*/
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static int
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__thr_select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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struct timeval *timeout)
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{
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struct pthread *curthread;
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int ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
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_thr_cancel_leave(curthread, ret == -1);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call sent
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* data, the thread is not canceled.
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*/
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static ssize_t
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__thr_sendmsg(int s, const struct msghdr *m, int f)
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{
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struct pthread *curthread;
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ssize_t ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_sendmsg(s, m, f);
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_thr_cancel_leave(curthread, ret <= 0);
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return (ret);
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}
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/*
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* Cancellation behavior:
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* Thread may be canceled at start, but if the system call sent some
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* data, the thread is not canceled.
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*/
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static ssize_t
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__thr_sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
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socklen_t tl)
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{
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struct pthread *curthread;
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ssize_t ret;
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curthread = _get_curthread();
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_thr_cancel_enter(curthread);
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ret = __sys_sendto(s, m, l, f, t, tl);
|
|
_thr_cancel_leave(curthread, ret <= 0);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
__thr_system(const char *string)
|
|
{
|
|
struct pthread *curthread;
|
|
int ret;
|
|
|
|
curthread = _get_curthread();
|
|
_thr_cancel_enter(curthread);
|
|
ret = __libc_system(string);
|
|
_thr_cancel_leave(curthread, 1);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Cancellation behavior:
|
|
* If thread is canceled, the system call is not completed,
|
|
* this means not all bytes were drained.
|
|
*/
|
|
static int
|
|
__thr_tcdrain(int fd)
|
|
{
|
|
struct pthread *curthread;
|
|
int ret;
|
|
|
|
curthread = _get_curthread();
|
|
_thr_cancel_enter(curthread);
|
|
ret = __libc_tcdrain(fd);
|
|
_thr_cancel_leave(curthread, ret == -1);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Cancellation behavior:
|
|
* Thread may be canceled at start, but if the system call returns
|
|
* a child pid, the thread is not canceled.
|
|
*/
|
|
static pid_t
|
|
__thr_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
|
|
{
|
|
struct pthread *curthread;
|
|
pid_t ret;
|
|
|
|
curthread = _get_curthread();
|
|
_thr_cancel_enter(curthread);
|
|
ret = __sys_wait4(pid, status, options, rusage);
|
|
_thr_cancel_leave(curthread, ret <= 0);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Cancellation behavior:
|
|
* Thread may be canceled at start, but if the system call returns
|
|
* a child pid, the thread is not canceled.
|
|
*/
|
|
static pid_t
|
|
__thr_wait6(idtype_t idtype, id_t id, int *status, int options,
|
|
struct __wrusage *ru, siginfo_t *infop)
|
|
{
|
|
struct pthread *curthread;
|
|
pid_t ret;
|
|
|
|
curthread = _get_curthread();
|
|
_thr_cancel_enter(curthread);
|
|
ret = __sys_wait6(idtype, id, status, options, ru, infop);
|
|
_thr_cancel_leave(curthread, ret <= 0);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Cancellation behavior:
|
|
* Thread may be canceled at start, but if the thread wrote some data,
|
|
* it is not canceled.
|
|
*/
|
|
static ssize_t
|
|
__thr_write(int fd, const void *buf, size_t nbytes)
|
|
{
|
|
struct pthread *curthread;
|
|
ssize_t ret;
|
|
|
|
curthread = _get_curthread();
|
|
_thr_cancel_enter(curthread);
|
|
ret = __sys_write(fd, buf, nbytes);
|
|
_thr_cancel_leave(curthread, (ret <= 0));
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Cancellation behavior:
|
|
* Thread may be canceled at start, but if the thread wrote some data,
|
|
* it is not canceled.
|
|
*/
|
|
static ssize_t
|
|
__thr_writev(int fd, const struct iovec *iov, int iovcnt)
|
|
{
|
|
struct pthread *curthread;
|
|
ssize_t ret;
|
|
|
|
curthread = _get_curthread();
|
|
_thr_cancel_enter(curthread);
|
|
ret = __sys_writev(fd, iov, iovcnt);
|
|
_thr_cancel_leave(curthread, (ret <= 0));
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
__thr_interpose_libc(void)
|
|
{
|
|
|
|
__set_error_selector(__error_threaded);
|
|
#define SLOT(name) \
|
|
*(__libc_interposing_slot(INTERPOS_##name)) = \
|
|
(interpos_func_t)__thr_##name;
|
|
SLOT(accept);
|
|
SLOT(accept4);
|
|
SLOT(aio_suspend);
|
|
SLOT(close);
|
|
SLOT(connect);
|
|
SLOT(fcntl);
|
|
SLOT(fsync);
|
|
SLOT(fork);
|
|
SLOT(msync);
|
|
SLOT(nanosleep);
|
|
SLOT(openat);
|
|
SLOT(poll);
|
|
SLOT(pselect);
|
|
SLOT(read);
|
|
SLOT(readv);
|
|
SLOT(recvfrom);
|
|
SLOT(recvmsg);
|
|
SLOT(select);
|
|
SLOT(sendmsg);
|
|
SLOT(sendto);
|
|
SLOT(setcontext);
|
|
SLOT(sigaction);
|
|
SLOT(sigprocmask);
|
|
SLOT(sigsuspend);
|
|
SLOT(sigwait);
|
|
SLOT(sigtimedwait);
|
|
SLOT(sigwaitinfo);
|
|
SLOT(swapcontext);
|
|
SLOT(system);
|
|
SLOT(tcdrain);
|
|
SLOT(wait4);
|
|
SLOT(write);
|
|
SLOT(writev);
|
|
SLOT(spinlock);
|
|
SLOT(spinunlock);
|
|
SLOT(kevent);
|
|
SLOT(wait6);
|
|
SLOT(ppoll);
|
|
SLOT(map_stacks_exec);
|
|
SLOT(fdatasync);
|
|
SLOT(clock_nanosleep);
|
|
#undef SLOT
|
|
*(__libc_interposing_slot(
|
|
INTERPOS__pthread_mutex_init_calloc_cb)) =
|
|
(interpos_func_t)_pthread_mutex_init_calloc_cb;
|
|
}
|