155 lines
4.1 KiB
C
155 lines
4.1 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/fcntl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/uio.h>
|
|
#include <errno.h>
|
|
#ifdef _THREAD_SAFE
|
|
#include <pthread.h>
|
|
#include "pthread_private.h"
|
|
|
|
int
|
|
sendfile(int fd, int s, off_t offset, size_t nbytes, struct sf_hdtr *hdtr,
|
|
off_t *sbytes, int flags)
|
|
{
|
|
int ret, type, blocking;
|
|
ssize_t wvret, num = 0;
|
|
off_t n, nwritten = 0;
|
|
|
|
/* Write the headers if any. */
|
|
if ((hdtr != NULL) && (hdtr->headers != NULL)) {
|
|
if (wvret = writev(s, hdtr->headers, hdtr->hdr_cnt) == -1) {
|
|
ret = -1;
|
|
goto ERROR;
|
|
} else
|
|
nwritten += wvret;
|
|
}
|
|
|
|
/* Lock the descriptors. */
|
|
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) != 0) {
|
|
ret = -1;
|
|
errno = EBADF;
|
|
goto ERROR;
|
|
}
|
|
if ((ret = _FD_LOCK(s, FD_WRITE, NULL)) != 0) {
|
|
ret = -1;
|
|
errno = EBADF;
|
|
goto ERROR_1;
|
|
}
|
|
|
|
/* Check the descriptor access modes. */
|
|
type = _thread_fd_table[fd]->flags & O_ACCMODE;
|
|
if (type != O_RDONLY && type != O_RDWR) {
|
|
/* File is not open for read. */
|
|
ret = -1;
|
|
errno = EBADF;
|
|
goto ERROR_2;
|
|
}
|
|
type = _thread_fd_table[s]->flags & O_ACCMODE;
|
|
if (type != O_WRONLY && type != O_RDWR) {
|
|
/* File is not open for write. */
|
|
ret = -1;
|
|
errno = EBADF;
|
|
goto ERROR_2;
|
|
}
|
|
|
|
/* Check if file operations are to block */
|
|
blocking = ((_thread_fd_table[s]->flags & O_NONBLOCK) == 0);
|
|
|
|
/*
|
|
* Loop while no error occurs and until the expected number of bytes are
|
|
* written.
|
|
*/
|
|
for (;;) {
|
|
/* Perform a non-blocking sendfile syscall. */
|
|
ret = _thread_sys_sendfile(fd, s, offset + num, nbytes - num,
|
|
NULL, &n, flags);
|
|
|
|
if (ret == 0) {
|
|
/* Writing completed. */
|
|
num += n;
|
|
break;
|
|
} else if ((blocking) && (ret == -1) && (errno == EAGAIN)) {
|
|
/*
|
|
* Some bytes were written but there are still more to
|
|
* write.
|
|
*/
|
|
|
|
/* Update the count of bytes written. */
|
|
num += n;
|
|
|
|
_thread_run->data.fd.fd = fd;
|
|
_thread_kern_set_timeout(NULL);
|
|
|
|
/* Reset the interrupted operation flag. */
|
|
_thread_run->interrupted = 0;
|
|
|
|
_thread_kern_sched_state(PS_FDW_WAIT, __FILE__,
|
|
__LINE__);
|
|
|
|
if (_thread_run->interrupted) {
|
|
/* Interrupted by a signal. Return an error. */
|
|
break;
|
|
}
|
|
} else {
|
|
/* Incomplete non-blocking syscall, or error. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
ERROR_2:
|
|
_FD_UNLOCK(s, FD_WRITE);
|
|
ERROR_1:
|
|
_FD_UNLOCK(fd, FD_READ);
|
|
ERROR:
|
|
if (ret == 0) {
|
|
/* Write the trailers, if any. */
|
|
if ((hdtr != NULL) && (hdtr->trailers != NULL)) {
|
|
if (wvret = writev(s, hdtr->trailers, hdtr->trl_cnt)
|
|
== -1)
|
|
ret = -1;
|
|
else
|
|
nwritten += wvret;
|
|
}
|
|
}
|
|
if (sbytes != NULL) {
|
|
/*
|
|
* Number of bytes written in headers/trailers, plus in the main
|
|
* sendfile() loop.
|
|
*/
|
|
*sbytes = nwritten + num;
|
|
}
|
|
return ret;
|
|
}
|
|
#endif
|