source: rtems/cpukit/libcsupport/src/readlink.c @ 92119ed

4.115
Last change on this file since 92119ed 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 *  readlink() - POSIX 1003.1b - X.X.X - XXX
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.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
21ssize_t readlink(
22  const char *pathname,
23  char       *buf,
24  size_t      bufsize
25)
26{
27  rtems_filesystem_location_info_t  loc;
28  int                               result;
29
30  if (!buf)
31    rtems_set_errno_and_return_minus_one( EFAULT );
32
33  result = rtems_filesystem_evaluate_path( pathname, strlen( pathname ),
34                                           0, &loc, false );
35  if ( result != 0 )
36     return -1;
37
38  if (  (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
39    rtems_filesystem_freenode( &loc );
40    rtems_set_errno_and_return_minus_one( EINVAL );
41  }
42
43  result =  (*loc.ops->readlink_h)( &loc, buf, bufsize );
44
45  rtems_filesystem_freenode( &loc );
46
47  return result;
48}
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