when certain processes terminate, everything else also terminates

[lukeshimanuki]

ideally this should only be the case with interface, but it happens with most programs
probably because writing to a pipe that's no longer open for reading is throws an error
this can probably be solved by ignoring SIGPIPE and handling errno in a sane way

you'll also run into problems when reading from a pipe that isn't open for writing
each process will need to handle EOF appropriately