Very silly program that creates Linux PTYs that act like a serial bus.
Note: you can probably achieve the same thing with socat(1).
The smallest setup is vsb -n 1, but that's pretty useless since you
only allocate a bus with a connection for a single serial device. A
better example is something like this:
$ vsb -n 2
vsb: device 1 => /dev/pts/3
vsb: device 2 => /dev/pts/4
Pay attention to the device node names, they will differ depending on your system. A future version of this program may add support for launching programs on these devices, or other scripting possibilities.
Here we got /dev/pts/3 and /dev/pts/4 which are PTY slave devices
where their respective master devices are bridged by vsb.
Made by Addiva Elektronik AB, Sweden. Available as Open Source under the MIT license. Please note, libus has a 3-clause BSD license which contains the advertising clause.