The s6-ftrig-wait program
s6-ftrig-wait subscribes to a fifodir and waits for a pattern of events to occur on this fifodir.
Interface
s6-ftrig-wait [ -t timeout ] fifodir regexp
- s6-ftrig-wait subscribes to fifodir
- It waits for the series of events received on fifodir to match regexp. regexp must be an Extended Regular Expression.
- When the series of read events matches regexp, s6-ftrig-wait prints the last event it received to stdout (one byte followed by a newline), then exits 0.
Options
- -t timeout : if the events on fifodir have not matched regexp after timeout milliseconds, print an error message on stderr and exit 1. By default, s6-ftrig-wait waits indefinitely for a matching series of events.