source: rtems/cpukit/libfs/src/dosfs/msdos_eval.c @ c499856

4.115
Last change on this file since c499856 was c499856, checked in by Chris Johns <chrisj@…>, on Mar 20, 2014 at 9:10:47 PM

Change all references of rtems.com to rtems.org.

  • Property mode set to 100644
File size: 2.8 KB
Line 
1/**
2 * @file
3 *
4 * @brief MSDOS Evaluation Routines
5 * @ingroup libfs
6 */
7
8/*
9 *  Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
10 *  Author: Eugeny S. Mints <Eugeny.Mints@oktet.ru>
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <sys/types.h>
22#include <sys/stat.h>
23#include <fcntl.h>
24#include <unistd.h>
25#include <errno.h>
26#include <stdlib.h>
27
28#include <rtems/libio_.h>
29
30#include "fat.h"
31#include "fat_fat_operations.h"
32#include "fat_file.h"
33
34#include "msdos.h"
35
36/* msdos_set_handlers --
37 *     Set handlers for the node with specified type(i.e. handlers for file
38 *     or directory).
39 *
40 * PARAMETERS:
41 *     loc - node description
42 *
43 * RETURNS:
44 *     None
45 */
46static void
47msdos_set_handlers(rtems_filesystem_location_info_t *loc)
48{
49    msdos_fs_info_t *fs_info = loc->mt_entry->fs_info;
50    fat_file_fd_t   *fat_fd = loc->node_access;
51
52    if (fat_fd->fat_file_type == FAT_DIRECTORY)
53        loc->handlers = fs_info->directory_handlers;
54    else
55        loc->handlers = fs_info->file_handlers;
56}
57
58static bool msdos_is_directory(
59  rtems_filesystem_eval_path_context_t *ctx,
60  void *arg
61)
62{
63  rtems_filesystem_location_info_t *currentloc =
64    rtems_filesystem_eval_path_get_currentloc( ctx );
65  fat_file_fd_t *fat_fd = currentloc->node_access;
66
67  return fat_fd->fat_file_type == MSDOS_DIRECTORY;
68}
69
70static rtems_filesystem_eval_path_generic_status msdos_eval_token(
71  rtems_filesystem_eval_path_context_t *ctx,
72  void *arg,
73  const char *token,
74  size_t tokenlen
75)
76{
77  rtems_filesystem_eval_path_generic_status status =
78    RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE;
79
80  if (rtems_filesystem_is_current_directory(token, tokenlen)) {
81    rtems_filesystem_eval_path_clear_token(ctx);
82    status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE;
83  } else {
84    rtems_filesystem_location_info_t *currentloc =
85      rtems_filesystem_eval_path_get_currentloc(ctx);
86    int rc = msdos_find_name(currentloc, token, tokenlen);
87
88    if (rc == RC_OK) {
89      rtems_filesystem_eval_path_clear_token(ctx);
90      msdos_set_handlers(currentloc);
91      if (rtems_filesystem_eval_path_has_path(ctx)) {
92        status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE;
93      }
94    } else if (rc == MSDOS_NAME_NOT_FOUND_ERR) {
95      status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY;
96    } else {
97      rtems_filesystem_eval_path_error(ctx, 0);
98    }
99  }
100
101  return status;
102}
103
104static const rtems_filesystem_eval_path_generic_config msdos_eval_config = {
105  .is_directory = msdos_is_directory,
106  .eval_token = msdos_eval_token
107};
108
109void msdos_eval_path(rtems_filesystem_eval_path_context_t *ctx)
110{
111  rtems_filesystem_eval_path_generic(ctx, NULL, &msdos_eval_config);
112}
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