diff options
Diffstat (limited to 'Lib/idlelib/PyShell.py')
| -rw-r--r-- | Lib/idlelib/PyShell.py | 47 |
1 files changed, 30 insertions, 17 deletions
diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py index b61297b..0136089 100644 --- a/Lib/idlelib/PyShell.py +++ b/Lib/idlelib/PyShell.py @@ -34,7 +34,8 @@ from idlelib import Debugger from idlelib import RemoteDebugger from idlelib import macosxSupport -LOCALHOST = '127.0.0.1' +HOST = '127.0.0.1' # python execution server on localhost loopback +PORT = 0 # someday pass in host, port for remote debug capability try: from signal import SIGTERM @@ -339,17 +340,21 @@ class ModifiedInterpreter(InteractiveInterpreter): InteractiveInterpreter.__init__(self, locals=locals) self.save_warnings_filters = None self.restarting = False - self.subprocess_arglist = self.build_subprocess_arglist() + self.subprocess_arglist = None + self.port = PORT - port = 8833 rpcclt = None rpcpid = None def spawn_subprocess(self): + if self.subprocess_arglist == None: + self.subprocess_arglist = self.build_subprocess_arglist() args = self.subprocess_arglist self.rpcpid = os.spawnv(os.P_NOWAIT, sys.executable, args) def build_subprocess_arglist(self): + assert (self.port!=0), ( + "Socket should have been assigned a port number.") w = ['-W' + s for s in sys.warnoptions] # Maybe IDLE is installed and is being accessed via sys.path, # or maybe it's not installed and the idle.py script is being @@ -368,11 +373,8 @@ class ModifiedInterpreter(InteractiveInterpreter): return [decorated_exec] + w + ["-c", command, str(self.port)] def start_subprocess(self): - # spawning first avoids passing a listening socket to the subprocess - self.spawn_subprocess() - #time.sleep(20) # test to simulate GUI not accepting connection - addr = (LOCALHOST, self.port) - # Idle starts listening for connection on localhost + addr = (HOST, self.port) + # GUI makes several attempts to acquire socket, listens for connection for i in range(3): time.sleep(i) try: @@ -383,6 +385,18 @@ class ModifiedInterpreter(InteractiveInterpreter): else: self.display_port_binding_error() return None + # if PORT was 0, system will assign an 'ephemeral' port. Find it out: + self.port = self.rpcclt.listening_sock.getsockname()[1] + # if PORT was not 0, probably working with a remote execution server + if PORT != 0: + # To allow reconnection within the 2MSL wait (cf. Stevens TCP + # V1, 18.6), set SO_REUSEADDR. Note that this can be problematic + # on Windows since the implementation allows two active sockets on + # the same address! + self.rpcclt.listening_sock.setsockopt(socket.SOL_SOCKET, + socket.SO_REUSEADDR, 1) + self.spawn_subprocess() + #time.sleep(20) # test to simulate GUI not accepting connection # Accept the connection from the Python execution server self.rpcclt.listening_sock.settimeout(10) try: @@ -734,13 +748,12 @@ class ModifiedInterpreter(InteractiveInterpreter): def display_port_binding_error(self): tkMessageBox.showerror( "Port Binding Error", - "IDLE can't bind TCP/IP port 8833, which is necessary to " - "communicate with its Python execution server. Either " - "no networking is installed on this computer or another " - "process (another IDLE?) is using the port. Run IDLE with the -n " - "command line switch to start without a subprocess and refer to " - "Help/IDLE Help 'Running without a subprocess' for further " - "details.", + "IDLE can't bind to a TCP/IP port, which is necessary to " + "communicate with its Python execution server. This might be " + "because no networking is installed on this computer. " + "Run IDLE with the -n command line switch to start without a " + "subprocess and refer to Help/IDLE Help 'Running without a " + "subprocess' for further details.", master=self.tkconsole.text) def display_no_subprocess_error(self): @@ -1285,7 +1298,7 @@ def main(): global flist, root, use_subprocess use_subprocess = True - enable_shell = False + enable_shell = True enable_edit = False debug = False cmd = None @@ -1306,6 +1319,7 @@ def main(): enable_shell = True if o == '-e': enable_edit = True + enable_shell = False if o == '-h': sys.stdout.write(usage_msg) sys.exit() @@ -1356,7 +1370,6 @@ def main(): edit_start = idleConf.GetOption('main', 'General', 'editor-on-startup', type='bool') enable_edit = enable_edit or edit_start - enable_shell = enable_shell or not edit_start # start editor and/or shell windows: root = Tk(className="Idle") |