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/*
* Copyright (c) 1995-1996, 1998 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/* Default implementation of writev()
implemented with multiple calls to oskit_stream_write(). */
#include <unistd.h>
#include <sys/uio.h>
#include "fd.h"
ssize_t writev(int fd, const struct iovec *vec, int count)
{
oskit_u32_t retval;
ssize_t actual = 0;
oskit_error_t rc;
FD_CHECK_STREAM(fd);
FD_ACCESS_LOCK(fd, FD_WRITE);
while (--count >= 0)
{
rc = oskit_stream_write(fd_array[fd].stream,
vec->iov_base, vec->iov_len, &retval);
if (rc) {
fd_unlock(fd);
errno = rc;
return -1;
}
actual += retval;
if (retval < vec->iov_len)
break;
vec++;
}
FD_ACCESS_UNLOCK(fd, FD_WRITE);
return actual;
}
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