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From "Andrew Franklin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (VFS-179) Traversal of directory tree with FileSelector fails with symbolic links in SFTP
Date Tue, 28 Jun 2011 23:42:29 GMT

    [ https://issues.apache.org/jira/browse/VFS-179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13056890#comment-13056890
] 

Andrew Franklin commented on VFS-179:
-------------------------------------

Hi Henning, I've been running with the patch since 2007 with no problems.

> Traversal of directory tree with FileSelector fails with symbolic links in SFTP
> -------------------------------------------------------------------------------
>
>                 Key: VFS-179
>                 URL: https://issues.apache.org/jira/browse/VFS-179
>             Project: Commons VFS
>          Issue Type: Bug
>            Reporter: Andrew Franklin
>         Attachments: VFS-179.patch
>
>
> It seems to me that when using the FileSelector to traverse a directory tree using SFTP,
a symbolic link will return as type File (even when the link points to a directory), which
will result in the directory node not being followed.
> By using a mechanism similar to that of FtpFileObject this can be resolved with the following...
> {noformat}
> protected FileType doGetType() throws Exception
> {
> 	if (attrs == null)
> 	{
> 		statSelf();
> 	}
> 	if (attrs == null)
> 	{
> 		return FileType.IMAGINARY;
> 	}
> 	if ((attrs.getFlags() & SftpATTRS.SSH_FILEXFER_ATTR_PERMISSIONS) == 0)
> 	{
> 		throw new FileSystemException( "vfs.provider.sftp/unknown-permissions.error");
> 	}
> 	if(attrs.isLink())
> 	{
> 		return getLinkDestination().getType();
> 	}
> 	else if (attrs.isDir())
> 	{
> 		return FileType.FOLDER;
> 	}
> 	else
> 	{
> 		return FileType.FILE;
> 	}
> }
> /**
>  * Return the destination of this file object if it's a symbolic link
>  * @return FileObject representing the linked to location
>  */
> private FileObject getLinkDestination() throws Exception
> {
> 	if (linkDestination == null)
> 	{
> 		final String path = fileSystem.getChannel().readlink( relPath );
> 		FileName relativeTo = getName().getParent();
> 		if (relativeTo == null)
> 		{
> 			relativeTo = getName();
> 		}
> 		FileName linkDestinationName = getFileSystem().getFileSystemManager().resolveName(relativeTo,
path);
> 		linkDestination = getFileSystem().resolveFile(linkDestinationName);
> 	}
> 	return linkDestination;
> }
> {noformat}

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