Arguments that were implicit before must now be made explicit. With the Bourne shell or Bash you can write `ls' to list the current directory's contents. With Plash you must add `.' to grant access to the current directory.

Files are passed to the program as read-only by default. Adding the `=>' operator to a command invocation allows you to grant write access to a file. Files that appear to the right of `=>' are passed to the program with write access.

Directories to the left of `=>' will be passed as *recursive* (or *transitive*) read-only: files and directories that they contain will also be read-only.

If you want to grant access to a file or directory without passing the filename as an argument, you can use the `+' operator. Files that appear to the right of a `+' are attached to the namespace of the process being run, but the filename is not included in the argument list.

The `=>' operator binds more tightly than `+'.

The shell distinguishes between filename arguments and plain string arguments so that it can tell which files to grant access to. Arguments beginning with a hyphen (`-') are interpreted as plain strings, but otherwise you must quote arguments to prevent them from being interpreted as filenames.

If you want to put a read-write file before a file that should only be read-only in the argument list, you can limit the scope of the `=>' operator by enclosing arguments in curly brackets { ... }.

You can run X Windows programs if you give them access to ~/.Xauthority, which contains a password generated by the X server, and /tmp/.X11-unix, which contains the socket for connecting to the X server. Programs must be given write access to a socket in order to connect to it.

Pipes work as in conventional shells.

If you want to execute a command in the conventional way, without running the process with a virtualised filesystem, in a chroot jail, etc., you can prefix it with "!!". This can be applied to individual command invocations in a pipeline. The syntax for command invocations is the same whether "!!" is used or not, but when it is used, files listed after the "+" operator are ignored.

Changing directory works as before.