int rtems_filesystem_evaluate_path(
const char *pathname,
size_t pathnamelen,
int flags,
rtems_filesystem_location_info_t *pathloc,
int follow_link
)
{
int i = 0;
/*
* Verify Input parameters.
*/
if ( !pathname )
rtems_set_errno_and_return_minus_one( EFAULT );
if ( !pathloc )
rtems_set_errno_and_return_minus_one( EIO ); /* should never happen */
/*
* Evaluate the path using the optable evalpath.
*/
rtems_filesystem_get_start_loc( pathname, &i, pathloc );
/*
* We evaluation the path relative to the start location we get got.
*/
return rtems_filesystem_evaluate_relative_path( &pathname[i],
pathnamelen - i,
flags,
pathloc,
follow_link );
}
int symlink(
const char *actualpath,
const char *sympath
)
{
rtems_filesystem_location_info_t loc;
int i;
const char *name_start;
int result;
rtems_filesystem_get_start_loc( sympath, &i, &loc );
if ( !loc.ops->evalformake_h ) {
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
result = (*loc.ops->evalformake_h)( &sympath[i], &loc, &name_start );
if ( result != 0 )
return -1;
if ( !loc.ops->symlink_h ) {
rtems_filesystem_freenode( &loc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
result = (*loc.ops->symlink_h)( &loc, actualpath, name_start);
rtems_filesystem_freenode( &loc );
return result;
}
int rmdir(
const char *pathname
)
{
int parentpathlen;
const char *name;
rtems_filesystem_location_info_t parentloc;
rtems_filesystem_location_info_t loc;
int i;
int result;
bool free_parentloc = false;
/*
* Get the parent node of the node we wish to remove. Find the parent path.
*/
parentpathlen = rtems_filesystem_dirname ( pathname );
if ( parentpathlen == 0 )
rtems_filesystem_get_start_loc( pathname, &i, &parentloc );
else {
result = rtems_filesystem_evaluate_path(pathname, parentpathlen,
RTEMS_LIBIO_PERMS_WRITE,
&parentloc,
false );
if ( result != 0 )
return -1;
free_parentloc = true;
}
/*
* Start from the parent to find the node that should be under it.
*/
loc = parentloc;
name = pathname + parentpathlen;
name += rtems_filesystem_prefix_separators( name, strlen( name ) );
result = rtems_filesystem_evaluate_relative_path( name , strlen( name ),
0, &loc, false );
if ( result != 0 ) {
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return -1;
}
/*
* Verify you can remove this node as a directory.
*/
if ( (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( ENOTDIR );
}
/*
* Use the filesystems rmnod to remove the node.
*/
result = (*loc.handlers->rmnod_h)( &parentloc, &loc );
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return result;
}
int unlink(
const char *path
)
{
int parentpathlen;
const char *name;
rtems_filesystem_location_info_t parentloc;
rtems_filesystem_location_info_t loc;
int i;
int result;
bool free_parentloc = false;
/*
* Get the node to be unlinked. Find the parent path first.
*/
parentpathlen = rtems_filesystem_dirname ( path );
if ( parentpathlen == 0 )
rtems_filesystem_get_start_loc( path, &i, &parentloc );
else {
result = rtems_filesystem_evaluate_path( path, parentpathlen,
RTEMS_LIBIO_PERMS_WRITE,
&parentloc,
false );
if ( result != 0 )
return -1;
free_parentloc = true;
}
/*
* Start from the parent to find the node that should be under it.
*/
loc = parentloc;
name = path + parentpathlen;
name += rtems_filesystem_prefix_separators( name, strlen( name ) );
result = rtems_filesystem_evaluate_relative_path( name , strlen( name ),
0, &loc, false );
if ( result != 0 ) {
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return -1;
}
if ( !loc.ops->node_type_h ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
if ( (*loc.ops->node_type_h)( &loc ) == RTEMS_FILESYSTEM_DIRECTORY ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( EISDIR );
}
if ( !loc.ops->unlink_h ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
result = (*loc.ops->unlink_h)( &parentloc, &loc );
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return result;
}