- Send commands across containers, using pipelines in a shared mount
- To send a command: picoput /path/to/pipe [arg...]
- To recv a command: #!/bin/picoput /path/to/pipe
- The received command forks a shell with argc, argv[] as usual
- This means that $0 and $# and $* and $@ represent the command
- It is valid to send no command; this is a mere sync signal
- Note that picoput does not block; it returns an error if noboy listens