Document the new seamless protocol command PERSISTENT

and implement the usage of the new command in rdesktop.

If a seamless command is specified the persistent mode
of the session will be changed to non-persistent.



git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/rdesktop/trunk@1822 423420c4-83ab-492f-b58f-81f9feb106b5

doc/seamlessrdp-channel.txt

@@ -294,6 +294,22 @@ For each window, the server will send CREATE, POSITION and STATE, in that
 order, just as if the window was created. Note that a TITLE may also,
 optionally, be sent before the STATE.
 
+PERSISTENT
+----------
+
+Change persistent mode for the session.
+
+Syntax:
+	PERSISTENT,<SERIAL>,<ENABLE>
+
+A seamless session always starts in persistent mode. This means that
+the session will not terminate if all applications is closed. 
+Upon re-connection to a session, the session will reset to persistent
+mode and client needs to change this if non persistent mode is wanted.
+If a persistent session not have any application running and is in
+disconnected state, it will terminate after a timeout is reached that
+matches the lifetime of the re-connection cookie.
+
 POSITION
 --------
 

proto.h

@@ -346,6 +346,7 @@ unsigned int seamless_send_zchange(unsigned long id, unsigned long below, unsign
 unsigned int seamless_send_focus(unsigned long id, unsigned long flags);
 unsigned int seamless_send_destroy(unsigned long id);
 unsigned int seamless_send_spawn(char *cmd);
+unsigned int seamless_send_persistent(RD_BOOL);
 
 /* scard.c */
 void scard_lock(int lock);

rdesktop.c

@@ -109,6 +109,7 @@ RD_BOOL g_seamless_rdp = False;
 RD_BOOL g_use_password_as_pin = False;
 char g_seamless_shell[512];
 char g_seamless_spawn_cmd[512];
+RD_BOOL g_seamless_persistent_mode = True;
 RD_BOOL g_user_quit = False;
 uint32 g_embed_wnd;
 uint32 g_rdp5_performanceflags =
@@ -614,6 +615,7 @@ main(int argc, char *argv[])
 
 			case 's':
 				STRNCPY(shell, optarg, sizeof(shell));
+				g_seamless_persistent_mode = False;
 				break;
 
 			case 'c':

seamless.c

@@ -3,7 +3,7 @@
    Seamless Windows support
    Copyright 2005-2008 Peter Astrand <astrand@cendio.se> for Cendio AB
    Copyright 2007-2008 Pierre Ossman <ossman@cendio.se> for Cendio AB
-   Copyright 2013 Henrik Andersson  <hean01@cendio.se> for Cendio AB   
+   Copyright 2013-2014 Henrik Andersson  <hean01@cendio.se> for Cendio AB   
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -542,3 +542,15 @@ seamless_send_spawn(char *cmdline)
 
 	return res;
 }
+
+unsigned int
+seamless_send_persistent(RD_BOOL enable)
+{
+	unsigned int res;
+	if (!g_seamless_rdp)
+		return (unsigned int) -1;
+	printf("%s persitent seamless mode.\n", enable?"Enable":"Disable");
+	res = seamless_send("PERSISTENT", "%d", enable);
+	
+	return res;
+}

xwin.c

@@ -95,6 +95,7 @@ static RD_BOOL g_seamless_active = False;	/* We are currently in seamless mode *
 static RD_BOOL g_seamless_hidden = False;	/* Desktop is hidden on server */
 static RD_BOOL g_seamless_broken_restack = False;	/* WM does not properly restack */
 extern RD_BOOL g_seamless_rdp;
+extern RD_BOOL g_seamless_persistent_mode;
 
 extern uint32 g_embed_wnd;
 RD_BOOL g_enable_compose = False;
@@ -3827,6 +3828,8 @@ ui_seamless_begin(RD_BOOL hidden)
 		seamless_send_spawn(g_seamless_spawn_cmd);
 		g_seamless_spawn_cmd[0] = 0;
 	}
+
+	seamless_send_persistent(g_seamless_persistent_mode);
 }