def run(proc_specs, tty_fd, callback):
argpipe_read, argpipe_write = shell_spawn.make_pipe()
pipe_read, pipe_write = shell_spawn.make_pipe()
proc_specs = map(reprable_spec, proc_specs)
args_data = repr((proc_specs, pipe_write.fileno(), tty_fd.fileno()))
# Exposes icky internal stuff in argv, visible in /proc.
# Send across pipe instead?
argv = ["python", __file__, str(argpipe_read.fileno())]
def in_subprocess():
argpipe_write.close()
os.execv(sys.executable, argv)
helper_pid = shell_spawn.in_forked(in_subprocess)
del argpipe_read
del pipe_write
# Forking and sending pids should be prompt, so we can block here.
argpipe_write.write(args_data)
argpipe_write.close()
pids = eval(pipe_read.readline(), {})
def on_ready(*args):
# TODO: This is not really safe because this reading is
# buffered. It could read multiple messages but we will only
# handle one.
line = pipe_read.readline()
if len(line) > 0:
message = eval(line, {})
callback(*message)
return True
else:
return False
gobject.io_add_watch(pipe_read.fileno(), gobject.IO_IN | gobject.IO_HUP,
on_ready)
return helper_pid, pids
def __init__(self):
self._queue = []
read_fd, self._write_fd = shell_spawn.make_pipe()
def on_ready(*args):
read_fd.read(1)
while True:
try:
func = self._queue.pop(0)
except IndexError:
break
else:
func()
return True
# Need to initialise threads otherwise pygobject won't drop
# the Python GIL while doing an iteration of the glib loop.
gobject.threads_init()
gobject.io_add_watch(read_fd.fileno(), gobject.IO_IN, on_ready)
