/*
* Copyright (c) 1999, 2000
* Intel Corporation.
* 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. All advertising materials mentioning features or use of this software must
* display the following acknowledgement:
*
* This product includes software developed by Intel Corporation and its
* contributors.
*
* 4. Neither the name of Intel Corporation or its contributors may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION 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 INTEL CORPORATION 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.
*
*/
/*++
Module Name:
writev.c
Abstract:
Functions implementing the standard "writev" system call interface
Revision History
--*/
#include <LibConfig.h>
#ifdef foo
#include <efi_interface.h>
#include <unistd.h>
#include <fcntl.h>
#define KERNEL
#include <errno.h>
#undef KERNEL
#include "./filedesc.h"
#include <libc_debug.h>
#include <assert.h>
#endif
#include <stdlib.h>
#include <unistd.h>
#include <sys/uio.h>
#include <string.h>
#ifndef KERNEL
#define KERNEL
#include <errno.h>
#undef KERNEL
#else
#include <errno.h>
#endif
//
// Name:
// writev
//
// Description:
// BSD writev interface for libc
//
// Arguments:
// File Descriptor (index into file descriptor table)
// iovec pointer
// size of iovec array
//
// Returns:
// number of bytes written
//
ssize_t
writev(
int fd,
const struct iovec *iov,
int iovcnt
)
{
const struct iovec *pVecTmp;
char *pBuf, *pBufTmp;
size_t TotalBytes, i, ret;
//
// See how much memory we'll need
//
for (i = 0, TotalBytes = 0, pVecTmp = iov; i < (size_t)iovcnt; i++, pVecTmp++) {
TotalBytes += pVecTmp->iov_len;
}
//
// Allocate a contiguous buffer
//
pBuf = (char*)malloc (TotalBytes);
if (pBuf == NULL) {
errno = ENOMEM;
return -1;
}
//
// Copy vectors to the buffer
//
for (pBufTmp = pBuf; iovcnt; iovcnt--) {
bcopy(iov->iov_base, pBuf, iov->iov_len);
pBuf += iov->iov_len;
iov++;
}
//
// Use standard write(2) then free buffer
//
ret = write (fd, pBuf, TotalBytes);
free (pBuf);
return (ret);
}