Implement LockWorkstation using xdg-screensaver from explorer

[Steven Edwards]

This time in explorer....

With this patch, Process Explorer no longer crashes when locking the
workstation from within the application. If xdg-screensaver is not
present on the system, explorer simply returns in which case
LockWorkstion thinks it still succeeded. I still like the idea of
having our own screensaver for Desktop mode and running that when
LockWorkstation is called. If this is accepted then I will either add
a check for desktop mode to avoid the call to xdg-screensaver or write
a wine scr that only runs in Desktop mode.

-- 
Steven Edwards

"There is one thing stronger than all the armies in the world, and
that is an idea whose time has come." - Victor Hugo
-------------- next part --------------
From 91c4b55fbc31ff282c44e109e2d84ecbfff70f8b Mon Sep 17 00:00:00 2001
From: Steven Edwards <winehacker at gmail.com>
Date: Fri, 27 Jul 2007 04:49:25 -0400
Subject: [PATCH] (partly) implement LockWorkstation using xdg-screensaver
---
 dlls/user32/user32.spec              |    2 +-
 dlls/user32/user_main.c              |   27 +++++++++++++++++++++++++++
 programs/explorer/desktop.c          |   13 +++++++++++++
 programs/explorer/explorer.c         |    5 +++++
 programs/explorer/explorer_private.h |    1 +
 5 files changed, 47 insertions(+), 1 deletions(-)

diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index 7e4ce33..f97afd6 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -475,7 +475,7 @@ # @ stub LoadKeyboardLayoutEx
 @ stdcall LockSetForegroundWindow (long)
 @ stub LockWindowStation
 @ stdcall LockWindowUpdate(long)
-@ stub LockWorkStation
+@ stdcall LockWorkStation()
 @ stdcall LookupIconIdFromDirectory(ptr long)
 @ stdcall LookupIconIdFromDirectoryEx(ptr long long long long)
 @ stub MBToWCSEx
diff --git a/dlls/user32/user_main.c b/dlls/user32/user_main.c
index e572220..591ff16 100644
--- a/dlls/user32/user_main.c
+++ b/dlls/user32/user_main.c
@@ -318,3 +318,30 @@ BOOL WINAPI ExitWindowsEx( UINT flags, D
     CloseHandle( pi.hThread );
     return TRUE;
 }
+
+/***********************************************************************
+ *		LockWorkStation (USER32.@)
+ */
+BOOL WINAPI LockWorkStation( void )
+{
+    static const WCHAR cmdW[] =
+        {'\\','e','x','p','l','o','r','e','r','.','e','x','e',' ','/','l','o','c','k',0};
+
+    WCHAR cmdline[MAX_PATH + 64];
+    PROCESS_INFORMATION pi;
+    STARTUPINFOW si;
+
+    GetSystemDirectoryW( cmdline, MAX_PATH );
+    lstrcatW( cmdline, cmdW );
+
+    memset( &si, 0, sizeof si );
+    si.cb = sizeof si;
+    if (!CreateProcessW( NULL, cmdline, NULL, NULL, FALSE, DETACHED_PROCESS, NULL, NULL, &si, &pi ))
+    {
+        ERR( "Failed to run %s\n", debugstr_w(cmdline) );
+        return FALSE;
+    }
+    CloseHandle( pi.hProcess );
+    CloseHandle( pi.hThread );
+    return TRUE;
+}
diff --git a/programs/explorer/desktop.c b/programs/explorer/desktop.c
index 7f2e23f..86bce5d 100644
--- a/programs/explorer/desktop.c
+++ b/programs/explorer/desktop.c
@@ -19,6 +19,7 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 
 #define OEMRESOURCE
 
@@ -211,3 +212,15 @@ void manage_desktop( char *arg )
 
     ExitProcess( 0 );
 }
+
+void lock_desktop( void )
+{
+    /* FIXME: do something here about running in desktop mode */
+    const char *argv[3];
+
+    argv[0] = "xdg-screensaver";
+    argv[1] = "lock";
+    argv[2] = NULL;
+    execvp( "xdg-screensaver1", (char **)argv );
+    return;
+}
diff --git a/programs/explorer/explorer.c b/programs/explorer/explorer.c
index 0f7c257..4aecf4c 100644
--- a/programs/explorer/explorer.c
+++ b/programs/explorer/explorer.c
@@ -135,6 +135,11 @@ static void ParseCommandLine(LPSTR comma
         {
             manage_desktop( p + 7 );  /* the rest of the command line is handled by desktop mode */
         }
+        else if (strncmp(p,"lock",5)==0)
+        {
+            lock_desktop();
+            return;
+        }
         p2 = p;
         p = strchr(p,'/');
     }
diff --git a/programs/explorer/explorer_private.h b/programs/explorer/explorer_private.h
index 59667eb..94c8534 100644
--- a/programs/explorer/explorer_private.h
+++ b/programs/explorer/explorer_private.h
@@ -26,6 +26,7 @@ extern BOOL add_dos_device( const char *
 extern BOOL remove_dos_device( const char *udi );
 
 extern void manage_desktop( char *arg );
+extern void lock_desktop( void );
 extern void initialize_diskarbitration(void);
 extern void initialize_hal(void);
 extern void initialize_systray(void);
-- 
1.4.1