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420 lines
12 KiB
420 lines
12 KiB
/*****************************************************************************
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*
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* Authors: Michel Eyckmans (MCE) & Stefan De Troch (SDT)
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*
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* Content: This file is part of version 2.x of xautolock. It implements
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* the program's core functions.
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*
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* Please send bug reports etc. to eyckmans@imec.be.
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*
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* --------------------------------------------------------------------------
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*
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* Copyright 1990,1992-1999,2001-2002 by Stefan De Troch and Michel Eyckmans.
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*
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* Versions 2.0 and above of xautolock are available under version 2 of the
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* GNU GPL. Earlier versions are available under other conditions. For more
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* information, see the License file.
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*
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*****************************************************************************/
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#include <X11/Xlib.h>
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#include <time.h>
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#include "xautolock_c.h"
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/*
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* Function for querying the idle time from the server.
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* Only used if either the Xidle or the Xscreensaver
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* extension is present.
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*/
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void
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xautolock_queryIdleTime (Display* d)
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{
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Time idleTime = 0; /* millisecs since last input event */
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#ifdef HasXidle
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if (xautolock_useXidle)
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{
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XGetIdleTime (d, &idleTime);
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}
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else
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#endif /* HasXIdle */
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{
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#ifdef HasScreenSaver
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if( xautolock_useMit )
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{
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static XScreenSaverInfo* mitInfo = 0;
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if (!mitInfo) mitInfo = XScreenSaverAllocInfo ();
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XScreenSaverQueryInfo (d, DefaultRootWindow (d), mitInfo);
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idleTime = mitInfo->idle;
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}
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else
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#endif /* HasScreenSaver */
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{
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d = d; /* shut up */
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return; /* DIY */
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}
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}
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if (idleTime < CHECK_INTERVAL )
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{
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xautolock_resetTriggers ();
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}
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}
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/*
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* Function for monitoring pointer movements. This implements the
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* `corners' feature and as a side effect also tracks pointer
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* related user activity. The latter actually is only needed when
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* we're using the DIY mode of operations, but it's much simpler
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* to do it unconditionally.
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*/
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void
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xautolock_queryPointer (Display* d)
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{
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Window dummyWin; /* as it says */
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int dummyInt; /* as it says */
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unsigned mask; /* modifier mask */
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int rootX; /* as it says */
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int rootY; /* as it says */
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int corner; /* corner index */
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time_t now; /* as it says */
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time_t newTrigger; /* temporary storage */
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int i; /* loop counter */
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static Window root; /* root window the pointer is on */
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static Screen* screen; /* screen the pointer is on */
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static unsigned prevMask = 0; /* as it says */
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static int prevRootX = -1; /* as it says */
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static int prevRootY = -1; /* as it says */
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static Bool firstCall = True; /* as it says */
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/*
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* Have a guess...
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*/
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if (firstCall)
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{
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firstCall = False;
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root = DefaultRootWindow (d);
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screen = ScreenOfDisplay (d, DefaultScreen (d));
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}
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/*
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* Find out whether the pointer has moved. Using XQueryPointer for this
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* is gross, but it also is the only way never to mess up propagation
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* of pointer events.
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*/
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if (!XQueryPointer (d, root, &root, &dummyWin, &rootX, &rootY,
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&dummyInt, &dummyInt, &mask))
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{
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/*
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* Pointer has moved to another screen, so let's find out which one.
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*/
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for (i = -1; ++i < ScreenCount (d); )
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{
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if (root == RootWindow (d, i))
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{
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screen = ScreenOfDisplay (d, i);
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break;
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}
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}
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}
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if ( rootX == prevRootX
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&& rootY == prevRootY
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&& mask == prevMask)
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{
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xautolock_corner_t* corners = xautolock_corners;
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/*
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* If the pointer has not moved since the previous call and
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* is inside one of the 4 corners, we act according to the
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* contents of the "corners" array.
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*
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* If rootX and rootY are less than zero, don't lock even if
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* ca_forceLock is set in the upper-left corner. Why? 'cause
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* on initial server startup, if (and only if) the pointer is
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* never moved, XQueryPointer() can return values less than
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* zero (only some servers, Openwindows 2.0 and 3.0 in
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* particular).
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*/
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if ( (corner = 0,
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rootX <= cornerSize && rootX >= 0
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&& rootY <= cornerSize && rootY >= 0)
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|| (corner++,
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rootX >= WidthOfScreen (screen) - cornerSize - 1
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&& rootY <= cornerSize)
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|| (corner++,
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rootX <= cornerSize
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&& rootY >= HeightOfScreen (screen) - cornerSize - 1)
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|| (corner++,
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rootX >= WidthOfScreen (screen) - cornerSize - 1
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&& rootY >= HeightOfScreen (screen) - cornerSize - 1))
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{
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now = time (0);
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switch (corners[corner])
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{
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case ca_forceLock:
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#if 0
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newTrigger = now + (useRedelay ? cornerRedelay : cornerDelay) - 1;
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#else
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newTrigger = now + 2 - 1;
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#endif
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#if 0
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if (newTrigger < lockTrigger)
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{
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setLockTrigger (newTrigger - now);
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}
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#else
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xautolock_setTrigger( newTrigger );
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#endif
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break;
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case ca_dontLock:
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xautolock_resetTriggers ();
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#ifdef __GNUC__
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default: ; /* Makes gcc -Wall shut up. */
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#endif /* __GNUC__ */
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}
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}
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}
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else
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{
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#if 0
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useRedelay = False;
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#endif
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prevRootX = rootX;
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prevRootY = rootY;
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prevMask = mask;
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xautolock_resetTriggers ();
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}
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}
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#if 0
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/*
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* Support for deciding whether to lock or kill.
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*/
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void
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evaluateTriggers (Display* d)
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{
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static time_t prevNotification = 0;
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time_t now = 0;
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/*
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* Obvious things first.
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*
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* The triggers are being moved all the time while in disabled
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* mode in order to make absolutely sure we cannot run into
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* trouble by an enable message coming in at an odd moment.
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* Otherwise we possibly might lock or kill too soon.
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*/
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if (disabled)
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{
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resetTriggers ();
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}
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/*
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* Next, wait for (or kill, if we were so told) the previous
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* locker (if any). Note that this must also be done while in
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* disabled mode. Not only to avoid a potential zombie proces
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* hanging around until we are re-enabled, but also to prevent
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* us from incorrectly setting a kill trigger at the moment
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* when we are finally re-enabled.
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*/
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#ifdef VMS
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if (vmsStatus == 0)
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{
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#else /* VMS */
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if (lockerPid)
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{
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#if !defined (UTEKV) && !defined (SYSV) && !defined (SVR4)
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union wait status; /* childs process status */
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#else /* !UTEKV && !SYSV && !SVR4 */
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int status = 0; /* childs process status */
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#endif /* !UTEKV && !SYSV && !SVR4 */
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if (unlockNow && !disabled)
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{
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(void) kill (lockerPid, SIGTERM);
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}
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#if !defined (UTEKV) && !defined (SYSV) && !defined (SVR4)
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if (wait3 (&status, WNOHANG, 0))
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#else /* !UTEKV && !SYSV && !SVR4 */
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if (waitpid (-1, &status, WNOHANG))
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#endif /* !UTEKV && !SYSV && !SVR4 */
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{
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/*
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* If the locker exited normally, we disable any pending kill
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* trigger. Otherwise, we assume that it either has crashed or
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* was not able to lock the display because of an existing
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* locker (which may have been started manually). In both of
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* the later cases, disabling the kill trigger would open a
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* loop hole.
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*/
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if ( WIFEXITED (status)
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&& WEXITSTATUS (status) == EXIT_SUCCESS)
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{
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disableKillTrigger ();
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}
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useRedelay = True;
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lockerPid = 0;
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}
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#endif /* VMS */
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setLockTrigger (lockTime);
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/*
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* No return here! The pointer may be sitting in a corner, while
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* parameter settings may be such that we need to start another
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* locker without further delay. If you think this cannot happen,
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* consider the case in which the locker simply crashed.
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*/
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}
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unlockNow = False;
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/*
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* Note that the above lot needs to be done even when we're in
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* disabled mode, since we may have entered said mode with an
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* active locker around.
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*/
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if (disabled) return;
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/*
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* Is it time to run the killer command?
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*/
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now = time (0);
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if (killTrigger && now >= killTrigger)
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{
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/*
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* There is a dirty trick here. On the one hand, we don't want
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* to block until the killer returns, but on the other one
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* we don't want to have it interfere with the wait() stuff we
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* do to keep track of the locker. To obtain both, the killer
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* command has already been patched by KillerChecker() so that
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* it gets backgrounded by the shell started by system().
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*
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* For the time being, VMS users are out of luck: their xautolock
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* will indeed block until the killer returns.
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*/
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(void) system (killer);
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setKillTrigger (killTime);
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}
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/*
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* Now trigger the notifier if required.
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*/
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if ( notifyLock
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&& now + notifyMargin >= lockTrigger
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&& prevNotification < now - notifyMargin - 1)
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{
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if (notifierSpecified)
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{
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/*
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* Here we use the same dirty trick as for the killer command.
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*/
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(void) system (notifier);
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}
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else
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{
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(void) XBell (d, bellPercent);
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(void) XSync (d, 0);
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}
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prevNotification = now;
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}
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/*
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* Finally fire up the locker if time has somehow come.
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*/
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if ( lockNow
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|| now >= lockTrigger)
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{
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#ifdef VMS
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if (vmsStatus != 0)
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#else /* VMS */
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if (!lockerPid)
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#endif /* VMS */
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{
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switch (lockerPid = vfork ())
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{
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case -1:
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lockerPid = 0;
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break;
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case 0:
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(void) close (ConnectionNumber (d));
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#ifdef VMS
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vmsStatus = 0;
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lockerPid = lib$spawn ((lockNow ? &nowLockerDescr : &lockerDescr),
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0, 0, &1, 0, 0, &vmsStatus);
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if (!(lockerPid & 1)) exit (lockerPid);
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#ifdef SLOW_VMS
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(void) sleep (SLOW_VMS_DELAY);
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#endif /* SLOW_VMS */
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#else /* VMS */
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(void) execl ("/bin/sh", "/bin/sh", "-c",
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(lockNow ? nowLocker : locker), 0);
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#endif /* VMS */
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_exit (EXIT_FAILURE);
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default:
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/*
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* In general xautolock should keep its fingers off the real
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* screensaver because no universally acceptable policy can
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* be defined. In no case should it decide to disable or enable
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* it all by itself. Setting the screensaver policy is something
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* the locker should take care of. After all, xautolock is not
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* supposed to know what the "locker" does and doesn't do.
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* People might be using xautolock for totally different
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* purposes (which, by the way, is why it will accept a
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* different set of X resources after being renamed).
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*
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* Nevertheless, simply resetting the screensaver is a
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* convenience action that aids many xlock users, and doesn't
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* harm anyone (*). The problem with older versions of xlock
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* is that they can be told to replace (= disable) the real
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* screensaver, but forget to reset that same screensaver if
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* it was already active at the time xlock starts. I guess
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* xlock initially wasn't designed to be run without a user
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* actually typing the comand ;-).
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*
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* (*) Well, at least it used not to harm anyone, but with the
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* advent of DPMS monitors, it now can mess up the power
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* saving setup. Hence we better make it optional.
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*
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* Also, some xlock versions also unconditionally call
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* XResetScreenSaver, yielding the same kind of problems
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* with DPMS that xautolock did. The latest and greatest
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* xlocks also have a -resetsaver option for this very
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* reason. You may want to upgrade.
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*/
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if (resetSaver) (void) XResetScreenSaver(d);
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setLockTrigger (lockTime);
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(void) XSync (d,0);
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}
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/*
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* Once the locker is running, all that needs to be done is to
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* set the killTrigger if needed. Notice that this must be done
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* even if we actually failed to start the locker. Otherwise
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* the error would "propagate" from one feature to another.
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*/
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if (killerSpecified) setKillTrigger (killTime);
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useRedelay = False;
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}
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lockNow = False;
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}
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}
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#endif
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