2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
3 * Copyright (c) 1991-1998 University of Maryland at College Park
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of U.M. not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. U.M. makes no representations about the
13 * suitability of this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
16 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
18 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Authors: the Amanda Development Team. Its members are listed in a
24 * file named AUTHORS, in the root directory of this distribution.
27 * $Id: writev.c,v 1.2 1999/03/04 22:40:08 kashmir Exp $
29 * emulation of writev that simply copies all iovecs into a contiguous
30 * buffer and writes that out in one write.
37 writev(fd, iov, iovcnt)
39 const struct iovec *iov;
48 * Get the sum of the iovecs, and allocate a suitably sized buffer
50 for (bufsize = 0, i = 0; i < iovcnt; i++)
51 bufsize += iov[i].iov_len;
55 * Copy each iovec back to back into the buffer
57 for (writeptr = buf, i = 0; i < iovcnt; i++) {
58 memcpy(writeptr, iov[i].iov_base, iov[i].iov_len);
59 writeptr += iov[i].iov_len;
63 * Write the buffer, free it, and return write's result
65 ret = write(fd, buf, bufsize);
69 #endif /* HAVE_WRITEV */