nullmodem (1) - Linux Manuals

nullmodem: a Utility to loopback Pseudo-Terminals

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>