source: rtems/c/src/lib/libc/readlink.c @ 4de102cc

4.104.114.84.95
Last change on this file since 4de102cc was a02224e, checked in by Joel Sherrill <joel.sherrill@…>, on 01/04/02 at 18:29:37

2002-01-04 Ralf Corsepius <corsepiu@…>

  • include/rtems/libio_.h: Remove set_errno_and_return_minus_one.
  • libc/cfsetispeed.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/cfsetospeed.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/chdir.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/chmod.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/chown.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/chroot.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/closedir.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/eval.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/fchdir.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/fchmod.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/fdatasync.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/fpathconf.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/fstat.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/fsync.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/ftruncate.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/getdents.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/ioctl.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/link.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/lseek.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/mknod.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/open.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/read.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/readlink.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/rmdir.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/stat.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/symlink.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/tcsetattr.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/telldir.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/ttyname.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/ttyname_r.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/unlink.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/unmount.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/utime.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • libc/write.c: Include <rtems/seterr.h>. Apply rtems_set_errno_and_return_minus_one.
  • Property mode set to 100644
File size: 1.3 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.OARcorp.com/rtems/license.html.
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
21int readlink(
22  const char *pathname,
23  char       *buf,
24  int         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, 0, &loc, FALSE );
34  if ( result != 0 )
35     return -1;
36 
37  if ( !loc.ops->node_type_h ){
38    rtems_filesystem_freenode( &loc );
39    rtems_set_errno_and_return_minus_one( ENOTSUP );
40  }
41
42  if (  (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
43    rtems_filesystem_freenode( &loc );
44    rtems_set_errno_and_return_minus_one( EINVAL );
45  }
46
47  if ( !loc.ops->readlink_h ){
48    rtems_filesystem_freenode( &loc );
49    rtems_set_errno_and_return_minus_one( ENOTSUP );
50  }
51
52  result =  (*loc.ops->readlink_h)( &loc, buf, bufsize );
53
54  rtems_filesystem_freenode( &loc );
55 
56  return result;
57}
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