source: rtems/c/src/lib/libc/write.c @ 08311cc3

4.104.114.84.95
Last change on this file since 08311cc3 was 08311cc3, checked in by Joel Sherrill <joel.sherrill@…>, on 11/17/99 at 17:51:34

Updated copyright notice.

  • Property mode set to 100644
File size: 1.4 KB
Line 
1/*
2 *  write() - POSIX 1003.1b 6.4.2 - Write to a File
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.OARcorp.com/rtems/license.html.
10 *
11 *  $Id$
12 */
13
14#include "libio_.h"
15
16
17/*
18 * write
19 *
20 * This routine writes count bytes from from buffer pointed to by buffer
21 * to the file associated with the open file descriptor, fildes.
22 */
23
24ssize_t write(
25  int         fd,
26  const void *buffer,
27  size_t      count
28)
29{
30  rtems_status_code  rc;
31  rtems_libio_t     *iop;
32
33  rtems_libio_check_fd( fd );
34  iop = rtems_libio_iop( fd );
35  rtems_libio_check_is_open(iop);
36  rtems_libio_check_buffer( buffer );
37  rtems_libio_check_count( count );
38  rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
39
40  /*
41   *  Now process the write() request.
42   */
43
44  if ( !iop->handlers->write )
45    set_errno_and_return_minus_one( ENOTSUP );
46
47  rc = (*iop->handlers->write)( iop, buffer, count );
48
49  if ( rc > 0 )
50    iop->offset += rc;
51
52  return rc;
53}
54
55/*
56 *  _write_r
57 *
58 *  This is the Newlib dependent reentrant version of write().
59 */
60
61#if defined(RTEMS_NEWLIB)
62
63#include <reent.h>
64
65long _write_r(
66  struct _reent *ptr,
67  int            fd,
68  const void    *buf,
69  size_t         nbytes
70)
71{
72  return write( fd, buf, nbytes );
73}
74#endif
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