Lacca.write_stdin

You're seeing just the function write_stdin, go back to Lacca module for more information.

Specs

write_stdin(pid(), String.t()) :: :ok | {:error, String.t()}

Returns :ok once the data has been sent to the underlying resin daemon.

Note that this function returns immediately after having sent the packet to the daemon, no guarantees as to the delivery to the child process are afforded. (i.e: the child may have closed its stdin prematurely, the child may have exited in the interim, it may be deadlocked and not processing stdin, etc.)