func cd(root, cwd client.Fid, cmdline string) (client.Fid, error) {
path, absolute := parsepath(cmdline)
f := cwd
if absolute {
f = root
}
f, qs, err := f.Walk(path)
if err != nil {
return cwd, err
}
if qs[len(qs)-1].Type != qp.QTDIR {
return cwd, errors.New("not a directory")
}
cwd.Clunk()
return f, nil
}
func getConn(ctlfid, rootfid client.Fid, network string) (client.Fid, error) {
if _, _, err := ctlfid.Open(qp.ORDWR); err != nil {
return nil, fmt.Errorf("unable to open ctl file: %v", err)
}
b, err := ctlfid.ReadOnce(0, 1024)
if err != nil {
return nil, fmt.Errorf("unable to read conn path: %v", err)
}
rf, _, err := rootfid.Walk([]string{network, string(b)})
if err != nil {
return nil, fmt.Errorf("unable to go to conn %s: %v", network+"/"+string(b), err)
}
return rf, nil
}