source: rtems/cpukit/libcsupport/src/write.c @ 98b785e

4.115
Last change on this file since 98b785e was 92119ed, checked in by Jennifer Averett <Jennifer.Averett@…>, on 07/01/10 at 15:12:38

2010-07-01 Jennifer Averett <Jennifer.Averett@…>

  • libcsupport/src/chdir.c, libcsupport/src/chmod.c, libcsupport/src/chown.c, libcsupport/src/close.c, libcsupport/src/eval.c, libcsupport/src/fchdir.c, libcsupport/src/fchmod.c, libcsupport/src/fchown.c, libcsupport/src/fcntl.c, libcsupport/src/fdatasync.c, libcsupport/src/freenode.c, libcsupport/src/fstat.c, libcsupport/src/fsync.c, libcsupport/src/ftruncate.c, libcsupport/src/ioctl.c, libcsupport/src/link.c, libcsupport/src/lseek.c, libcsupport/src/mknod.c, libcsupport/src/mount.c, libcsupport/src/open.c, libcsupport/src/read.c, libcsupport/src/readlink.c, libcsupport/src/readv.c, libcsupport/src/rmdir.c, libcsupport/src/stat.c, libcsupport/src/statvfs.c, libcsupport/src/symlink.c, libcsupport/src/unlink.c, libcsupport/src/unmount.c, libcsupport/src/write.c: Removed filesystem checks for NULL methods checks from the main posix rountines. These are now required to have at a miminum default routines in the tables.
  • Property mode set to 100644
File size: 1.1 KB
Line 
1/*
2 *  write() - POSIX 1003.1b 6.4.2 - Write to a File
3 *
4 *  COPYRIGHT (c) 1989-2007.
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.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14#if HAVE_CONFIG_H
15#include "config.h"
16#endif
17
18#include <rtems/libio_.h>
19#include <rtems/seterr.h>
20
21/*
22 * write
23 *
24 * This routine writes count bytes from from buffer pointed to by buffer
25 * to the file associated with the open file descriptor, fildes.
26 */
27
28ssize_t write(
29  int         fd,
30  const void *buffer,
31  size_t      count
32)
33{
34  ssize_t  rc;
35  rtems_libio_t     *iop;
36
37  rtems_libio_check_fd( fd );
38  iop = rtems_libio_iop( fd );
39  rtems_libio_check_is_open( iop );
40  rtems_libio_check_buffer( buffer );
41  rtems_libio_check_count( count );
42  rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
43
44  if ( count == 0 )
45    return 0;
46
47  /*
48   *  Now process the write() request.
49   */
50  rc = (*iop->handlers->write_h)( iop, buffer, count );
51
52  if ( rc > 0 )
53    iop->offset += rc;
54
55  return rc;
56}
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