.Fl a
flag is specified, wait this many seconds between successive retries.
.El
.Pp
If
.Nm
receives a
.Dv SIGINFO
(see the ``status'' argument for
.Xr stty 1 )
signal, the current transfer rate statistics will be written to the
standard error output, in the same format as the standard completion
message.
.Sh DIAGNOSTICS
The