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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2012-01-22 01:02:36 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2012-01-22 01:02:36 -0600
commitb81e43465b14836b17e4fe2dea91c78a2bdd29b3 (patch)
tree7815d61ce59a6ccb6e655ed44f5fea786f520985 /kdm/backend/reset.c
parent7021f40c13f949b7cb5ded32d0241d648a43bf6c (diff)
downloadtdebase-b81e43465b14836b17e4fe2dea91c78a2bdd29b3.tar.gz
tdebase-b81e43465b14836b17e4fe2dea91c78a2bdd29b3.zip
Part 2 of prior commit
Diffstat (limited to 'kdm/backend/reset.c')
-rw-r--r--kdm/backend/reset.c111
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diff --git a/kdm/backend/reset.c b/kdm/backend/reset.c
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--- a/kdm/backend/reset.c
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-/*
-
-Copyright 1988, 1998 The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-The above copyright notice and this permission notice shall be included
-in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of a copyright holder shall
-not be used in advertising or otherwise to promote the sale, use or
-other dealings in this Software without prior written authorization
-from the copyright holder.
-
-*/
-
-/*
- * xdm - display manager daemon
- * Author: Keith Packard, MIT X Consortium
- *
- * pseudoReset -- pretend to reset the server by killing all clients
- * with windows. It will reset the server most of the time, unless
- * a client remains connected with no windows.
- */
-
-#include "dm.h"
-#include "dm_error.h"
-
-#include <X11/Xlib.h>
-
-#include <signal.h>
-
-/*ARGSUSED*/
-static int
-ignoreErrors( Display *dspl ATTR_UNUSED, XErrorEvent *event ATTR_UNUSED )
-{
- Debug( "ignoring error\n" );
- return 0;
-}
-
-/*
- * this is mostly bogus -- but quite useful. I wish the protocol
- * had some way of enumerating and identifying clients, that way
- * this code wouldn't have to be this kludgy.
- */
-
-static void
-killWindows( Window window )
-{
- Window root, parent, *children;
- unsigned int child, nchildren = 0;
-
- while (XQueryTree( dpy, window, &root, &parent, &children, &nchildren )
- && nchildren > 0)
- {
- for (child = 0; child < nchildren; child++) {
- Debug( "XKillClient %p\n", children[child] );
- XKillClient( dpy, children[child] );
- }
- XFree( (char *)children );
- }
-}
-
-static Jmp_buf resetJmp;
-
-/* ARGSUSED */
-static void
-abortReset( int n ATTR_UNUSED )
-{
- Longjmp( resetJmp, 1 );
-}
-
-/*
- * this display connection better not have any windows...
- */
-
-void
-pseudoReset()
-{
- int screen;
-
- if (Setjmp( resetJmp )) {
- LogError( "pseudoReset timeout\n" );
- } else {
- (void)Signal( SIGALRM, abortReset );
- (void)alarm( 30 );
- XSetErrorHandler( ignoreErrors );
- for (screen = 0; screen < ScreenCount (dpy); screen++) {
- Debug( "pseudoReset screen %d\n", screen );
- killWindows( RootWindow( dpy, screen ) );
- }
- Debug( "before XSync\n" );
- XSync( dpy, False );
- (void)alarm( 0 );
- }
- Signal( SIGALRM, SIG_DFL );
- XSetErrorHandler( (XErrorHandler)0 );
- Debug( "pseudoReset done\n" );
-}