s6-ftrig-notify sends a series of events to a fifodir.
s6-ftrig-notify fifodir message
s6-ftrig-notify notifies all the current listeners in fifodir with all the characters in message, one by one.
s6-ftrig-notify cannot be used to send the null character (event 0x00). If you need to send the null character, use the C API: ftrigw_notify().