#!/usr/bin/python
# Run a command, with stdout redirected to a timestamped filename (produced
# through strftime). Each time the filename changes, restart the command.
# Usage: runtimed FILENAMEFORMAT COMMAND ...
# Adam Sampson <ats@offog.org>

import sys, os, signal, subprocess, time

def main(args):
	format = args[0]
	cmd = args[1:]

	child = None
	old_filename = None
	while True:
		filename = time.strftime(format, time.localtime(time.time()))
		if filename == old_filename:
			time.sleep(1)
			continue
		old_filename = filename

		if child is not None:
			# On Python 2.6, this can be:
			# child.terminate()
			os.kill(child.pid, signal.SIGTERM)

			child.wait()

		print ">>> Writing to %s" % filename
		f = open(filename, "w")
		child = subprocess.Popen(cmd, stdout=f)

if __name__ == "__main__":
	main(sys.argv[1:])