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Diffstat (limited to 'cpukit/libfs/src/dosfs/msdos_eval.c')
-rw-r--r--cpukit/libfs/src/dosfs/msdos_eval.c416
1 files changed, 45 insertions, 371 deletions
diff --git a/cpukit/libfs/src/dosfs/msdos_eval.c b/cpukit/libfs/src/dosfs/msdos_eval.c
index 9b5e0c835d..0ab5971e62 100644
--- a/cpukit/libfs/src/dosfs/msdos_eval.c
+++ b/cpukit/libfs/src/dosfs/msdos_eval.c
@@ -52,384 +52,58 @@ msdos_set_handlers(rtems_filesystem_location_info_t *loc)
loc->handlers = fs_info->file_handlers;
}
-/* msdos_eval_path --
- *
- * The following routine evaluate path for a node that wishes to be
- * accessed. Structure 'pathloc' is returned with a pointer to the
- * node to be accessed.
- *
- * PARAMETERS:
- * pathname - path for evaluation
- * flags - flags
- * pathloc - node description (IN/OUT)
- *
- * RETURNS:
- * RC_OK and filled pathloc on success, or -1 if error occured
- * (errno set appropriately)
- *
- */
-int
-msdos_eval_path(
- const char *pathname,
- size_t pathnamelen,
- int flags,
- rtems_filesystem_location_info_t *pathloc
- )
+static bool msdos_is_directory(
+ rtems_filesystem_eval_path_context_t *ctx,
+ void *arg
+)
{
- int rc = RC_OK;
- rtems_status_code sc = RTEMS_SUCCESSFUL;
- msdos_fs_info_t *fs_info = pathloc->mt_entry->fs_info;
- fat_file_fd_t *fat_fd = NULL;
- rtems_filesystem_location_info_t newloc;
- int i = 0;
- int token_len = 0;
- msdos_token_types_t type = MSDOS_CURRENT_DIR;
- const char *token;
-
- sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
- MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_set_errno_and_return_minus_one(EIO);
-
- if (!pathloc->node_access)
- {
- errno = ENOENT;
- rc = -1;
- goto err;
- }
-
- fat_fd = pathloc->node_access;
-
- rc = fat_file_reopen(fat_fd);
- if (rc != RC_OK)
- goto err;
-
- while ((type != MSDOS_NO_MORE_PATH) && (type != MSDOS_INVALID_TOKEN))
- {
- type = msdos_get_token(&pathname[i], pathnamelen, &token, &token_len);
- pathnamelen -= token_len;
- i += token_len;
-
- fat_fd = pathloc->node_access;
-
- switch (type)
- {
- case MSDOS_UP_DIR:
- /*
- * Only a directory can be decended into.
- */
- if (fat_fd->fat_file_type != FAT_DIRECTORY)
- {
- errno = ENOTSUP;
- rc = -1;
- goto error;
- }
+ rtems_filesystem_location_info_t *currentloc =
+ rtems_filesystem_eval_path_get_currentloc( ctx );
+ fat_file_fd_t *fat_fd = currentloc->node_access;
- /*
- * Am I at the root of this mounted filesystem?
- */
- if (rtems_filesystem_is_root_location(pathloc))
- {
- /*
- * Am I at the root of all filesystems?
- * XXX: MSDOS is not supposed to be base fs.
- */
- if (pathloc->node_access ==
- rtems_filesystem_root.node_access)
- {
- break; /* Throw out the .. in this case */
- }
- else
- {
- newloc = pathloc->mt_entry->mt_point_node;
- *pathloc = newloc;
-
- rc = fat_file_close(pathloc->mt_entry, fat_fd);
- if (rc != RC_OK)
- goto err;
-
- rtems_semaphore_release(fs_info->vol_sema);
- return (*pathloc->ops->evalpath_h)(&(pathname[i-token_len]),
- pathnamelen + token_len,
- flags, pathloc);
- }
- }
- else
- {
- rc = msdos_find_name(pathloc, token, token_len);
- if (rc != RC_OK)
- {
- if (rc == MSDOS_NAME_NOT_FOUND_ERR)
- {
- errno = ENOENT;
- rc = -1;
- }
- goto error;
- }
- }
- break;
-
- case MSDOS_NAME:
- /*
- * Only a directory can be decended into.
- */
- if (fat_fd->fat_file_type != FAT_DIRECTORY)
- {
- errno = ENOTSUP;
- rc = -1;
- goto error;
- }
-
- /*
- * Otherwise find the token name in the present location and
- * set the node access to the point we have found.
- */
- rc = msdos_find_name(pathloc, token, token_len);
- if (rc != RC_OK)
- {
- if (rc == MSDOS_NAME_NOT_FOUND_ERR)
- {
- errno = ENOENT;
- rc = -1;
- }
- goto error;
- }
- break;
-
- case MSDOS_NO_MORE_PATH:
- case MSDOS_CURRENT_DIR:
- break;
-
- case MSDOS_INVALID_TOKEN:
- errno = ENAMETOOLONG;
- rc = -1;
- goto error;
- break;
-
- }
- }
-
- /*
- * Always return the root node.
- *
- * If we are at a node that is a mount point. Set loc to the
- * new fs root node and let let the mounted filesystem set the handlers.
- *
- * NOTE: The behavior of stat() on a mount point appears to be
- * questionable.
- * NOTE: MSDOS filesystem currently doesn't support mount functionality ->
- * action not implemented
- */
- fat_fd = pathloc->node_access;
-
- msdos_set_handlers(pathloc);
-
- rtems_semaphore_release(fs_info->vol_sema);
- return RC_OK;
-
-error:
- fat_file_close(pathloc->mt_entry, fat_fd);
-
-err:
- rtems_semaphore_release(fs_info->vol_sema);
- return rc;
+ return fat_fd->fat_file_type == MSDOS_DIRECTORY;
}
-/* msdos_eval4make --
- * The following routine evaluate path for a new node to be created.
- * 'pathloc' is returned with a pointer to the parent of the new node.
- * 'name' is returned with a pointer to the first character in the
- * new node name. The parent node is verified to be a directory.
- *
- * PARAMETERS:
- * path - path for evaluation
- * pathloc - IN/OUT (start point for evaluation/parent directory for
- * creation)
- * name - new node name
- *
- * RETURNS:
- * RC_OK, filled pathloc for parent directory and name of new node on
- * success, or -1 if error occured (errno set appropriately)
- */
-int
-msdos_eval4make(
- const char *path,
- rtems_filesystem_location_info_t *pathloc,
- const char **name
- )
+static rtems_filesystem_eval_path_generic_status msdos_eval_token(
+ rtems_filesystem_eval_path_context_t *ctx,
+ void *arg,
+ const char *token,
+ size_t tokenlen
+)
{
- int rc = RC_OK;
- rtems_status_code sc = RTEMS_SUCCESSFUL;
- msdos_fs_info_t *fs_info = pathloc->mt_entry->fs_info;
- fat_file_fd_t *fat_fd = NULL;
- rtems_filesystem_location_info_t newloc;
- msdos_token_types_t type;
- int i = 0;
- int token_len;
- const char *token;
- bool done = false;
-
- sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
- MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_set_errno_and_return_minus_one(EIO);
-
- if (!pathloc->node_access)
- {
- errno = ENOENT;
- rc = -1;
- goto err;
+ rtems_filesystem_eval_path_generic_status status =
+ RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE;
+
+ if (rtems_filesystem_is_current_directory(token, tokenlen)) {
+ rtems_filesystem_eval_path_clear_token(ctx);
+ status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE;
+ } else {
+ rtems_filesystem_location_info_t *currentloc =
+ rtems_filesystem_eval_path_get_currentloc(ctx);
+ int rc = msdos_find_name(currentloc, token, tokenlen);
+
+ if (rc == RC_OK) {
+ rtems_filesystem_eval_path_clear_token(ctx);
+ msdos_set_handlers(currentloc);
+ if (rtems_filesystem_eval_path_has_path(ctx)) {
+ status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE;
+ }
+ } else if (rc == MSDOS_NAME_NOT_FOUND_ERR) {
+ status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY;
+ } else {
+ rtems_filesystem_eval_path_error(ctx, 0);
}
+ }
- fat_fd = pathloc->node_access;
-
- rc = fat_file_reopen(fat_fd);
- if (rc != RC_OK)
- goto err;
-
- while (!done)
- {
- type = msdos_get_token(&path[i], strlen(&path[i]), &token, &token_len);
- i += token_len;
- fat_fd = pathloc->node_access;
-
- switch (type)
- {
- case MSDOS_UP_DIR:
- /*
- * Only a directory can be decended into.
- */
- if (fat_fd->fat_file_type != FAT_DIRECTORY)
- {
- errno = ENOTDIR;
- rc = -1;
- goto error;
- }
-
- /*
- * Am I at the root of this mounted filesystem?
- */
- if (rtems_filesystem_is_root_location(pathloc))
- {
- /*
- * Am I at the root of all filesystems?
- * XXX: MSDOS is not supposed to be base fs.
- */
- if (pathloc->node_access ==
- rtems_filesystem_root.node_access)
- {
- break; /* Throw out the .. in this case */
- }
- else
- {
- newloc = pathloc->mt_entry->mt_point_node;
- *pathloc = newloc;
-
- rc = fat_file_close(pathloc->mt_entry, fat_fd);
- if (rc != RC_OK)
- goto err;
-
- rtems_semaphore_release(fs_info->vol_sema);
- return (*pathloc->ops->evalformake_h)(&path[i-token_len],
- pathloc, name);
- }
- }
- else
- {
- rc = msdos_find_name(pathloc, token, token_len);
- if (rc != RC_OK)
- {
- if (rc == MSDOS_NAME_NOT_FOUND_ERR)
- {
- errno = ENOENT;
- rc = -1;
- }
- goto error;
- }
- }
- break;
-
- case MSDOS_NAME:
- /*
- * Only a directory can be decended into.
- */
- if (fat_fd->fat_file_type != FAT_DIRECTORY)
- {
- errno = ENOTDIR;
- rc = -1;
- goto error;
- }
-
- /*
- * Otherwise find the token name in the present location and
- * set the node access to the point we have found.
- */
- rc = msdos_find_name(pathloc, token, token_len);
- if (rc)
- {
- if (rc != MSDOS_NAME_NOT_FOUND_ERR)
- {
- errno = ENOENT;
- rc = -1;
- goto error;
- }
- else
- done = true;
- }
- break;
-
- case MSDOS_NO_MORE_PATH:
- errno = EEXIST;
- rc = -1;
- goto error;
- break;
-
- case MSDOS_CURRENT_DIR:
- break;
-
- case MSDOS_INVALID_TOKEN:
- errno = ENAMETOOLONG;
- rc = -1;
- goto error;
- break;
-
- }
- }
-
- *name = &path[i - token_len];
-
- /*
- * We have evaluated the path as far as we can.
- * Verify there is not any invalid stuff at the end of the name.
- */
- for( ; path[i] != '\0'; i++)
- {
- if (!msdos_is_separator(path[i]))
- {
- errno = ENOENT;
- rc = -1;
- goto error;
- }
- }
-
- fat_fd = pathloc->node_access;
-
- if (fat_fd->fat_file_type != FAT_DIRECTORY)
- {
- errno = ENOTDIR;
- rc = -1;
- goto error;
- }
-
- msdos_set_handlers(pathloc);
-
- rtems_semaphore_release(fs_info->vol_sema);
- return RC_OK;
+ return status;
+}
-error:
- fat_file_close(pathloc->mt_entry, fat_fd);
+static const rtems_filesystem_eval_path_generic_config msdos_eval_config = {
+ .is_directory = msdos_is_directory,
+ .eval_token = msdos_eval_token
+};
-err:
- rtems_semaphore_release(fs_info->vol_sema);
- return rc;
+void msdos_eval_path(rtems_filesystem_eval_path_context_t *ctx)
+{
+ rtems_filesystem_eval_path_generic(ctx, NULL, &msdos_eval_config);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 10:30:21 +0000