int
msdos_rmnod(const rtems_filesystem_location_info_t *parent_pathloc,
const rtems_filesystem_location_info_t *pathloc)
{
int rc = RC_OK;
fat_file_fd_t *fat_fd = pathloc->node_access;
if (fat_fd->fat_file_type == MSDOS_DIRECTORY)
{
bool is_empty = false;
/*
* You cannot remove a node that still has children
*/
rc = msdos_dir_is_empty(pathloc->mt_entry, fat_fd, &is_empty);
if (rc != RC_OK)
{
return rc;
}
if (!is_empty)
{
rtems_set_errno_and_return_minus_one(ENOTEMPTY);
}
/*
* We deny attempts to delete open directory (if directory is current
* directory we assume it is open one)
*/
if (fat_fd->links_num > 1)
{
rtems_set_errno_and_return_minus_one(EBUSY);
}
/*
* You cannot remove the file system root node.
*/
if (rtems_filesystem_location_is_root(pathloc))
{
rtems_set_errno_and_return_minus_one(EBUSY);
}
/*
* You cannot remove a mountpoint.
* not used - mount() not implemenetd yet.
*/
}
/* mark file removed */
rc = msdos_set_first_char4file_name(pathloc->mt_entry, &fat_fd->dir_pos,
MSDOS_THIS_DIR_ENTRY_EMPTY);
if (rc != RC_OK)
{
return rc;
}
fat_file_mark_removed(pathloc->mt_entry, fat_fd);
return rc;
}
int unmount( const char *path )
{
int rv = 0;
rtems_filesystem_eval_path_context_t ctx;
int eval_flags = RTEMS_FS_FOLLOW_LINK;
const rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_start( &ctx, path, eval_flags );
rtems_filesystem_mount_table_entry_t *mt_entry = currentloc->mt_entry;
if ( rtems_filesystem_location_is_root( currentloc ) ) {
if ( !contains_root_or_current_directory( mt_entry ) ) {
const rtems_filesystem_operations_table *mt_point_ops =
mt_entry->mt_point_node->location.mt_entry->ops;
rv = (*mt_point_ops->unmount_h)( mt_entry );
if ( rv == 0 ) {
rtems_id self_task_id = rtems_task_self();
rtems_filesystem_mt_entry_declare_lock_context( lock_context );
rtems_filesystem_mt_entry_lock( lock_context );
mt_entry->unmount_task = self_task_id;
mt_entry->mounted = false;
rtems_filesystem_mt_entry_unlock( lock_context );
}
} else {
errno = EBUSY;
rv = -1;
}
} else {
errno = EACCES;
rv = -1;
}
rtems_filesystem_eval_path_cleanup( &ctx );
if ( rv == 0 ) {
rtems_event_set out;
rtems_status_code sc = rtems_event_receive(
RTEMS_FILESYSTEM_UNMOUNT_EVENT,
RTEMS_EVENT_ALL | RTEMS_WAIT,
RTEMS_NO_TIMEOUT,
&out
);
if ( sc != RTEMS_SUCCESSFUL ) {
rtems_fatal_error_occurred( 0xdeadbeef );
}
}
return rv;
}
