1 files changed, 763 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_syscalls.c b/lib/libthr/thread/thr_syscalls.c
new file mode 100644
index 0000000..2327d74
--- /dev/null
+++ b/lib/libthr/thread/thr_syscalls.c
@@ -0,0 +1,763 @@
+/*
+ * Copyright (C) 2005 David Xu <davidxu@freebsd.org>.
+ * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>.
+ * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice(s), this list of conditions and the following disclaimer as
+ *    the first lines of this file unmodified other than the possible
+ *    addition of one or more copyright notices.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice(s), this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+#include <sys/select.h>
+#include <sys/signalvar.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+#include <sys/wait.h>
+#include <aio.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <pthread.h>
+#include "un-namespace.h"
+
+#include "thr_private.h"
+
+extern int	__creat(const char *, mode_t);
+extern int	__pselect(int, fd_set *, fd_set *, fd_set *,
+			const struct timespec *, const sigset_t *);
+extern unsigned	__sleep(unsigned int);
+extern int	__system(const char *);
+extern int	__tcdrain(int);
+extern int	__usleep(useconds_t);
+extern pid_t	__wait(int *);
+extern pid_t	__waitpid(pid_t, int *, int);
+extern int	__sys_aio_suspend(const struct aiocb * const[], int,
+			const struct timespec *);
+extern int	__sys_accept(int, struct sockaddr *, socklen_t *);
+extern int	__sys_connect(int, const struct sockaddr *, socklen_t);
+extern int	__sys_fsync(int);
+extern int	__sys_msync(void *, size_t, int);
+extern int	__sys_pselect(int, fd_set *, fd_set *, fd_set *,
+			const struct timespec *, const sigset_t *);
+extern int	__sys_poll(struct pollfd *, unsigned, int);
+extern ssize_t	__sys_recv(int, void *, size_t, int);
+extern ssize_t	__sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
+extern ssize_t	__sys_recvmsg(int, struct msghdr *, int);
+extern int	__sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+extern int	__sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *,
+			off_t *, int);
+extern ssize_t	__sys_sendmsg(int, const struct msghdr *, int);
+extern ssize_t	__sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t);
+extern ssize_t	__sys_readv(int, const struct iovec *, int);
+extern pid_t	__sys_wait4(pid_t, int *, int, struct rusage *);
+extern ssize_t	__sys_writev(int, const struct iovec *, int);
+
+int	___creat(const char *, mode_t);
+int	___pselect(int, fd_set *, fd_set *, fd_set *, 
+		const struct timespec *, const sigset_t *);
+unsigned	___sleep(unsigned);
+int	___system(const char *);
+int	___tcdrain(int);
+int	___usleep(useconds_t useconds);
+pid_t	___wait(int *);
+pid_t	___waitpid(pid_t, int *, int);
+int	__accept(int, struct sockaddr *, socklen_t *);
+int	__aio_suspend(const struct aiocb * const iocbs[], int,
+		const struct timespec *);
+int	__close(int);
+int	__connect(int, const struct sockaddr *, socklen_t);
+int	__fcntl(int, int,...);
+#ifdef SYSCALL_COMPAT
+extern int __fcntl_compat(int, int,...);
+#endif
+int	__fsync(int);
+int	__msync(void *, size_t, int);
+int	__nanosleep(const struct timespec *, struct timespec *);
+int	__open(const char *, int,...);
+int	__openat(int, const char *, int,...);
+int	__poll(struct pollfd *, unsigned int, int);
+ssize_t	__read(int, void *buf, size_t);
+ssize_t	__readv(int, const struct iovec *, int);
+ssize_t	__recvfrom(int, void *, size_t, int f, struct sockaddr *, socklen_t *);
+ssize_t	__recvmsg(int, struct msghdr *, int);
+int	__select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+ssize_t	__sendmsg(int, const struct msghdr *, int);
+ssize_t	__sendto(int, const void *, size_t, int,
+		const struct sockaddr *, socklen_t);
+pid_t	__wait3(int *, int, struct rusage *);
+pid_t	__wait4(pid_t, int *, int, struct rusage *);
+ssize_t	__write(int, const void *, size_t);
+ssize_t	__writev(int, const struct iovec *, int);
+
+__weak_reference(__accept, accept);
+
+/*
+ * Cancellation behavior:
+ *   If thread is canceled, no socket is created.
+ */
+int
+__accept(int s, struct sockaddr *addr, socklen_t *addrlen)
+{
+	struct pthread *curthread;
+	int ret;
+
+	curthread = _get_curthread();
+	_thr_cancel_enter(curthread);
+	ret = __sys_accept(s, addr, addrlen);
+	_thr_cancel_leave(curthread, ret == -1);
+
+ 	return (ret);
+}
+
+__weak_reference(__aio_suspend, aio_suspend);
+
+int
+__aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
+    timespec *timeout)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_aio_suspend(iocbs, niocb, timeout);
+	_thr_cancel_leave(curthread, 1);
+
+	return (ret);
+}
+
+__weak_reference(__close, close);
+
+/*
+ * Cancellation behavior:
+ *   According to manual of close(), the file descriptor is always deleted.
+ *   Here, thread is only canceled after the system call, so the file
+ *   descriptor is always deleted despite whether the thread is canceled
+ *   or not.
+ */
+int
+__close(int fd)
+{
+	struct pthread	*curthread = _get_curthread();
+	int	ret;
+
+	_thr_cancel_enter2(curthread, 0);
+	ret = __sys_close(fd);
+	_thr_cancel_leave(curthread, 1);
+	
+	return (ret);
+}
+
+__weak_reference(__connect, connect);
+
+/*
+ * Cancellation behavior:
+ *   If the thread is canceled, connection is not made.
+ */
+int
+__connect(int fd, const struct sockaddr *name, socklen_t namelen)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_connect(fd, name, namelen);
+	_thr_cancel_leave(curthread, ret == -1);
+
+ 	return (ret);
+}
+
+__weak_reference(___creat, creat);
+
+/*
+ * Cancellation behavior:
+ *   If thread is canceled, file is not created.
+ */
+int
+___creat(const char *path, mode_t mode)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __creat(path, mode);
+	_thr_cancel_leave(curthread, ret == -1);
+	
+	return ret;
+}
+
+__weak_reference(__fcntl, fcntl);
+
+/*
+ * Cancellation behavior:
+ *   According to specification, only F_SETLKW is a cancellation point.
+ *   Thread is only canceled at start, or canceled if the system call
+ *   is failure, this means the function does not generate side effect
+ *   if it is canceled.
+ */
+int
+__fcntl(int fd, int cmd,...)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+	va_list	ap;
+
+	va_start(ap, cmd);
+	if (cmd == F_OSETLKW || cmd == F_SETLKW) {
+		_thr_cancel_enter(curthread);
+#ifdef SYSCALL_COMPAT
+		ret = __fcntl_compat(fd, cmd, va_arg(ap, void *));
+#else
+		ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
+#endif
+		_thr_cancel_leave(curthread, ret == -1);
+	} else {
+#ifdef SYSCALL_COMPAT
+		ret = __fcntl_compat(fd, cmd, va_arg(ap, void *));
+#else
+		ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
+#endif
+	}
+	va_end(ap);
+
+	return (ret);
+}
+
+__weak_reference(__fsync, fsync);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled after system call.
+ */
+int
+__fsync(int fd)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+
+	_thr_cancel_enter2(curthread, 0);
+	ret = __sys_fsync(fd);
+	_thr_cancel_leave(curthread, 1);
+
+	return (ret);
+}
+
+__weak_reference(__msync, msync);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled after system call.
+ */
+int
+__msync(void *addr, size_t len, int flags)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+
+	_thr_cancel_enter2(curthread, 0);
+	ret = __sys_msync(addr, len, flags);
+	_thr_cancel_leave(curthread, 1);
+
+	return ret;
+}
+
+__weak_reference(__nanosleep, nanosleep);
+
+int
+__nanosleep(const struct timespec *time_to_sleep,
+    struct timespec *time_remaining)
+{
+	struct pthread *curthread = _get_curthread();
+	int		ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_nanosleep(time_to_sleep, time_remaining);
+	_thr_cancel_leave(curthread, 1);
+
+	return (ret);
+}
+
+__weak_reference(__open, open);
+
+/*
+ * Cancellation behavior:
+ *   If the thread is canceled, file is not opened.
+ */
+int
+__open(const char *path, int flags,...)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+	int	mode = 0;
+	va_list	ap;
+
+	/* Check if the file is being created: */
+	if (flags & O_CREAT) {
+		/* Get the creation mode: */
+		va_start(ap, flags);
+		mode = va_arg(ap, int);
+		va_end(ap);
+	}
+	
+	_thr_cancel_enter(curthread);
+	ret = __sys_open(path, flags, mode);
+	_thr_cancel_leave(curthread, ret == -1);
+
+	return ret;
+}
+
+__weak_reference(__openat, openat);
+
+/*
+ * Cancellation behavior:
+ *   If the thread is canceled, file is not opened.
+ */
+int
+__openat(int fd, const char *path, int flags, ...)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+	int	mode = 0;
+	va_list	ap;
+
+	
+	/* Check if the file is being created: */
+	if (flags & O_CREAT) {
+		/* Get the creation mode: */
+		va_start(ap, flags);
+		mode = va_arg(ap, int);
+		va_end(ap);
+	}
+	
+	_thr_cancel_enter(curthread);
+	ret = __sys_openat(fd, path, flags, mode);
+	_thr_cancel_leave(curthread, ret == -1);
+
+	return ret;
+}
+
+__weak_reference(__poll, poll);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns something,
+ *   the thread is not canceled.
+ */
+int
+__poll(struct pollfd *fds, unsigned int nfds, int timeout)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_poll(fds, nfds, timeout);
+	_thr_cancel_leave(curthread, ret == -1);
+
+	return ret;
+}
+
+__weak_reference(___pselect, pselect);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns something,
+ *   the thread is not canceled.
+ */
+int 
+___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, 
+	const struct timespec *timo, const sigset_t *mask)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_pselect(count, rfds, wfds, efds, timo, mask);
+	_thr_cancel_leave(curthread, ret == -1);
+
+	return (ret);
+}
+
+__weak_reference(__read, read);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call got some data, 
+ *   the thread is not canceled.
+ */
+ssize_t
+__read(int fd, void *buf, size_t nbytes)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t	ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_read(fd, buf, nbytes);
+	_thr_cancel_leave(curthread, ret == -1);
+
+	return ret;
+}
+
+__weak_reference(__readv, readv);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call got some data, 
+ *   the thread is not canceled.
+ */
+ssize_t
+__readv(int fd, const struct iovec *iov, int iovcnt)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_readv(fd, iov, iovcnt);
+	_thr_cancel_leave(curthread, ret == -1);
+	return ret;
+}
+
+__weak_reference(__recvfrom, recvfrom);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call got some data, 
+ *   the thread is not canceled.
+ */
+ssize_t
+__recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from,
+    socklen_t *fl)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_recvfrom(s, b, l, f, from, fl);
+	_thr_cancel_leave(curthread, ret == -1);
+	return (ret);
+}
+
+__weak_reference(__recvmsg, recvmsg);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call got some data, 
+ *   the thread is not canceled.
+ */
+ssize_t
+__recvmsg(int s, struct msghdr *m, int f)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_recvmsg(s, m, f);
+	_thr_cancel_leave(curthread, ret == -1);
+	return (ret);
+}
+
+__weak_reference(__select, select);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns something,
+ *   the thread is not canceled.
+ */
+int 
+__select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+	struct timeval *timeout)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
+	_thr_cancel_leave(curthread, ret == -1);
+	return ret;
+}
+
+__weak_reference(__sendmsg, sendmsg);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call sent
+ *   data, the thread is not canceled.
+ */
+ssize_t
+__sendmsg(int s, const struct msghdr *m, int f)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_sendmsg(s, m, f);
+	_thr_cancel_leave(curthread, ret <= 0);
+	return (ret);
+}
+
+__weak_reference(__sendto, sendto);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call sent some
+ *   data, the thread is not canceled.
+ */
+ssize_t
+__sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
+    socklen_t tl)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_sendto(s, m, l, f, t, tl);
+	_thr_cancel_leave(curthread, ret <= 0);
+	return (ret);
+}
+
+__weak_reference(___sleep, sleep);
+
+unsigned int
+___sleep(unsigned int seconds)
+{
+	struct pthread *curthread = _get_curthread();
+	unsigned int	ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sleep(seconds);
+	_thr_cancel_leave(curthread, 1);
+	
+	return (ret);
+}
+
+__weak_reference(___system, system);
+
+int
+___system(const char *string)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __system(string);
+	_thr_cancel_leave(curthread, 1);
+	
+	return ret;
+}
+
+__weak_reference(___tcdrain, tcdrain);
+
+/*
+ * Cancellation behavior:
+ *   If thread is canceled, the system call is not completed,
+ *   this means not all bytes were drained.
+ */
+int
+___tcdrain(int fd)
+{
+	struct pthread *curthread = _get_curthread();
+	int	ret;
+	
+	_thr_cancel_enter(curthread);
+	ret = __tcdrain(fd);
+	_thr_cancel_leave(curthread, ret == -1);
+	return (ret);
+}
+
+__weak_reference(___usleep, usleep);
+
+int
+___usleep(useconds_t useconds)
+{
+	struct pthread *curthread = _get_curthread();
+	int		ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __usleep(useconds);
+	_thr_cancel_leave(curthread, 1);
+	
+	return (ret);
+}
+
+__weak_reference(___wait, wait);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns
+ *   a child pid, the thread is not canceled.
+ */
+pid_t
+___wait(int *istat)
+{
+	struct pthread *curthread = _get_curthread();
+	pid_t	ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __wait(istat);
+	_thr_cancel_leave(curthread, ret <= 0);
+
+	return ret;
+}
+
+__weak_reference(__wait3, wait3);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns
+ *   a child pid, the thread is not canceled.
+ */
+pid_t
+__wait3(int *status, int options, struct rusage *rusage)
+{
+	struct pthread *curthread = _get_curthread();
+	pid_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = _wait4(WAIT_ANY, status, options, rusage);
+	_thr_cancel_leave(curthread, ret <= 0);
+
+	return (ret);
+}
+
+__weak_reference(__wait4, wait4);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns
+ *   a child pid, the thread is not canceled.
+ */
+pid_t
+__wait4(pid_t pid, int *status, int options, struct rusage *rusage)
+{
+	struct pthread *curthread = _get_curthread();
+	pid_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_wait4(pid, status, options, rusage);
+	_thr_cancel_leave(curthread, ret <= 0);
+
+	return ret;
+}
+
+__weak_reference(___waitpid, waitpid);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the system call returns
+ *   a child pid, the thread is not canceled.
+ */
+pid_t
+___waitpid(pid_t wpid, int *status, int options)
+{
+	struct pthread *curthread = _get_curthread();
+	pid_t	ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __waitpid(wpid, status, options);
+	_thr_cancel_leave(curthread, ret <= 0);
+	
+	return ret;
+}
+
+__weak_reference(__write, write);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the thread wrote some data,
+ *   it is not canceled.
+ */
+ssize_t
+__write(int fd, const void *buf, size_t nbytes)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t	ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_write(fd, buf, nbytes);
+	_thr_cancel_leave(curthread, (ret <= 0));
+	return ret;
+}
+
+__weak_reference(__writev, writev);
+
+/*
+ * Cancellation behavior:
+ *   Thread may be canceled at start, but if the thread wrote some data,
+ *   it is not canceled.
+ */
+ssize_t
+__writev(int fd, const struct iovec *iov, int iovcnt)
+{
+	struct pthread *curthread = _get_curthread();
+	ssize_t ret;
+
+	_thr_cancel_enter(curthread);
+	ret = __sys_writev(fd, iov, iovcnt);
+	_thr_cancel_leave(curthread, (ret <= 0));
+	return ret;
+}