source: rtems/cpukit/libcsupport/src/readlink.c @ 9c3fa30

4.104.114.84.95
Last change on this file since 9c3fa30 was 9c3fa30, checked in by Joel Sherrill <joel.sherrill@…>, on 09/28/00 at 20:19:23

2000-09-28 Joel Sherrill <joel@…>

  • libc/libio.h (rtems_filesystem_file_handlers_r, rtems_filesystem_operations_table): Added _h to all structure fields to indicate they are "handlers".
  • libc/libio_.h, libc/chdir.c, libc/chmod.c, libc/chown.c, libc/close.c, libc/eval.c, libc/fchdir.c, libc/fchmod.c, libc/fcntl.c, libc/fdatasync.c, libc/fstat.c, libc/fsync.c, libc/ftruncate.c, libc/getdents.c, libc/imfs_eval.c, libc/imfs_unlink.c, libc/ioctl.c, libc/ioman.c, libc/link.c, libc/lseek.c, libc/mknod.c, libc/mount.c, libc/open.c, libc/read.c, libc/readlink.c, libc/rmdir.c, libc/stat.c, libc/symlink.c, libc/unlink.c, libc/unmount.c, libc/utime.c, libc/write.c: Modified to reflect above name change.
  • 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#include "libio_.h"
15
16int readlink(
17  const char *pathname,
18  char       *buf,
19  int         bufsize
20)
21{
22  rtems_filesystem_location_info_t  loc;
23  int                               result;
24
25  if (!buf)
26    set_errno_and_return_minus_one( EFAULT );
27
28  result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
29  if ( result != 0 )
30     return -1;
31 
32  if ( !loc.ops->node_type_h ){
33    rtems_filesystem_freenode( &loc );
34    set_errno_and_return_minus_one( ENOTSUP );
35  }
36
37  if (  (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
38    rtems_filesystem_freenode( &loc );
39    set_errno_and_return_minus_one( EINVAL );
40  }
41
42  if ( !loc.ops->readlink_h ){
43    rtems_filesystem_freenode( &loc );
44    set_errno_and_return_minus_one( ENOTSUP );
45  }
46
47  result =  (*loc.ops->readlink_h)( &loc, buf, bufsize );
48
49  rtems_filesystem_freenode( &loc );
50 
51  return result;
52}
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