1NULLMODEM(1)                     User Manuals                     NULLMODEM(1)
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NAME

6       nullmodem - a Utility to loopback Pseudo-Terminals
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SYNOPSIS

9       nullmodem [-F] [-V] [-q] [-r] [-m] tty...
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DESCRIPTION

13       nullmodem  creates  a  virtual  network of Pseudo-Terminals.  It can be
14       used as an adapter to connect two programs that  normally  need  serial
15       interface cards.
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OPTIONS

19       -F, --foreground
20              Unlike normal operation, nullmodem will not detach from the ter‐
21              minal when given this option.  Some debugging informations  will
22              be visible.
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25       -q, --quiet
26              Start quietly - for init scripts.
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29       -v, --verbose
30              Print debug info.
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33       -V, --version
34              Print the version number and exit.
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37       -r, --realtime
38              Start  with  realtime  priority (i.e. use the round-robin sched‐
39              uler).  This requires nullmodem to run with root privileges.
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42       -m, --memorylock
43              Lock the executable of nullmodem to RAM.  This  keeps  nullmodem
44              from being swapped out.
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47       --setuid n
48              Set the UserID (UID) of the pseudo terminal spacial files to n.
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51       --setgid n
52              Set the GroupID (GID) of the pseudo terminal spacial files to n.
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55       --blocking
56              Use blocking IO to handle the interfaces (default: NONBLOCKing).
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AUTHOR

60       Juergen Rinas <jrinas@gmx.de>
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SEE ALSO

63       kissnetd(8), openpty(3)
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67Linux                              JULY 2004                      NULLMODEM(1)