source: rtems/c/src/lib/libc/readlink.c @ 98f3cfa

4.104.114.84.95
Last change on this file since 98f3cfa was 9c49db4, checked in by Joel Sherrill <joel.sherrill@…>, on 01/08/01 at 18:26:44

2001-01-08 Ralf Corsepius <corsepiu@…>

  • configure.in: Add libc/config.h
  • libc/Makefile.am: Add INCLUDES += -I. to pickup config.h
  • libc/.cvsignore: Add config.h and stamp-h
  • libc/*.c: Add config.h support.
  • Property mode set to 100644
File size: 1.2 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
20int readlink(
21  const char *pathname,
22  char       *buf,
23  int         bufsize
24)
25{
26  rtems_filesystem_location_info_t  loc;
27  int                               result;
28
29  if (!buf)
30    set_errno_and_return_minus_one( EFAULT );
31
32  result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
33  if ( result != 0 )
34     return -1;
35 
36  if ( !loc.ops->node_type_h ){
37    rtems_filesystem_freenode( &loc );
38    set_errno_and_return_minus_one( ENOTSUP );
39  }
40
41  if (  (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
42    rtems_filesystem_freenode( &loc );
43    set_errno_and_return_minus_one( EINVAL );
44  }
45
46  if ( !loc.ops->readlink_h ){
47    rtems_filesystem_freenode( &loc );
48    set_errno_and_return_minus_one( ENOTSUP );
49  }
50
51  result =  (*loc.ops->readlink_h)( &loc, buf, bufsize );
52
53  rtems_filesystem_freenode( &loc );
54 
55  return result;
56}
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