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From "Andrew Franklin (JIRA)" <j...@apache.org>
Subject [jira] Updated: (VFS-179) Traversal of directory tree with FileSelector fails with symbolic links in SFTP
Date Fri, 26 Oct 2007 04:18:50 GMT

     [ https://issues.apache.org/jira/browse/VFS-179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Franklin updated VFS-179:
--------------------------------

    Summary: Traversal of directory tree with FileSelector fails with symbolic links in SFTP
 (was: Traversal of directory tree with FileSelector fails with symbolic links in FTP &
SFTP)

> 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...
> 	/**
> 	 * Determines the type of this file, returns null if the file does not
> 	 * exist.
> 	 */
> 	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;
> 	}

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