libcsupport/src/writev.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  * @brief writev() - POSIX 1003.1 - Write a Vector
0006  *
0007  * OpenGroup URL:
0008  *
0009  * http://www.opengroup.org/onlinepubs/009695399/functions/writev.html
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2011.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <sys/uio.h>
0043
0044 #include <rtems/libio_.h>
0045
0046 static ssize_t writev_adapter(
0047   rtems_libio_t      *iop,
0048   const struct iovec *iov,
0049   int                 iovcnt,
0050   ssize_t             total
0051 )
0052 {
0053   return ( *iop->pathinfo.handlers->writev_h )( iop, iov, iovcnt, total );
0054 }
0055
0056 ssize_t writev(
0057   int                 fd,
0058   const struct iovec *iov,
0059   int                 iovcnt
0060 )
0061 {
0062   return rtems_libio_iovec_eval(
0063     fd,
0064     iov,
0065     iovcnt,
0066     LIBIO_FLAGS_WRITE,
0067     writev_adapter
0068   );
0069 }