nullmodem (1) Linux Manual Page
NAME
nullmodem – a Utility to loopback Pseudo-Terminals
SYNOPSIS
nullmodem [-F] [-V] [-q] [-r] [-m] tty…
DESCRIPTION
nullmodem creates a virtual network of Pseudo-Terminals. It can be used as an adapter to connect two programs that normally need serial interface cards.
OPTIONS
-F, –foreground- Unlike normal operation, nullmodem will not detach from the terminal when given this option. Some debugging informations will be visible.
-q, –quiet- Start quietly – for init scripts.
-v, –verbose- Print debug info.
-V, –version- Print the version number and exit.
-r, –realtime- Start with realtime priority (i.e. use the round-robin scheduler). This requires nullmodem to run with root privileges.
-m, –memorylock- Lock the executable of nullmodem to RAM. This keeps nullmodem from being swapped out.
–setuid n- Set the UserID (UID) of the pseudo terminal spacial files to n.
–setgid n- Set the GroupID (GID) of the pseudo terminal spacial files to n.
–blocking- Use blocking IO to handle the interfaces (default: NONBLOCKing).
AUTHOR
Juergen Rinas <jrinas [at] gmx.de>