/* msdos_file_rmnod --
* Remove node associated with a file - set up first name character to
* predefined value(and write it to the disk), and mark fat-file which
* correspondes to the file as "removed"
*
* PARAMETERS:
* pathloc - node description
*
* RETURNS:
* RC_OK on success, or -1 if error occured (errno set appropriately)
*/
int
msdos_file_rmnod(rtems_filesystem_location_info_t *parent_pathloc,
rtems_filesystem_location_info_t *pathloc)
{
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 = pathloc->node_access;
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);
/* 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)
{
rtems_semaphore_release(fs_info->vol_sema);
return rc;
}
fat_file_mark_removed(pathloc->mt_entry, fat_fd);
rtems_semaphore_release(fs_info->vol_sema);
return RC_OK;
}
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;
}
