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      1 /*
      2 
      3 Copyright 1986, 1998  The Open Group
      4 
      5 Permission to use, copy, modify, distribute, and sell this software and its
      6 documentation for any purpose is hereby granted without fee, provided that
      7 the above copyright notice appear in all copies and that both that
      8 copyright notice and this permission notice appear in supporting
      9 documentation.
     10 
     11 The above copyright notice and this permission notice shall be included in
     12 all copies or substantial portions of the Software.
     13 
     14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
     17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     20 
     21 Except as contained in this notice, the name of The Open Group shall not be
     22 used in advertising or otherwise to promote the sale, use or other dealings
     23 in this Software without prior written authorization from The Open Group.
     24 
     25 */
     26 
     27 #ifdef HAVE_CONFIG_H
     28 #include <config.h>
     29 #endif
     30 #include "Xlibint.h"
     31 
     32 /*
     33  * XErrorHandler - This procedure sets the X non-fatal error handler
     34  * (_XErrorFunction) to be the specified routine.  If NULL is passed in
     35  * the original error handler is restored.
     36  */
     37 
     38 XErrorHandler
     39 XSetErrorHandler(XErrorHandler handler)
     40 {
     41     int (*oldhandler)(Display *dpy, XErrorEvent *event);
     42 
     43     _XLockMutex(_Xglobal_lock);
     44     oldhandler = _XErrorFunction;
     45 
     46     if (!oldhandler)
     47 	oldhandler = _XDefaultError;
     48 
     49     if (handler != NULL) {
     50 	_XErrorFunction = handler;
     51     }
     52     else {
     53 	_XErrorFunction = _XDefaultError;
     54     }
     55     _XUnlockMutex(_Xglobal_lock);
     56 
     57     return (XErrorHandler) oldhandler;
     58 }
     59 
     60 /*
     61  * XIOErrorHandler - This procedure sets the X fatal I/O error handler
     62  * (_XIOErrorFunction) to be the specified routine.  If NULL is passed in
     63  * the original error handler is restored.
     64  */
     65 
     66 XIOErrorHandler
     67 XSetIOErrorHandler(XIOErrorHandler handler)
     68 {
     69     int (*oldhandler)(Display *dpy);
     70 
     71     _XLockMutex(_Xglobal_lock);
     72     oldhandler = _XIOErrorFunction;
     73 
     74     if (!oldhandler)
     75 	oldhandler = _XDefaultIOError;
     76 
     77     if (handler != NULL) {
     78 	_XIOErrorFunction = handler;
     79     }
     80     else {
     81 	_XIOErrorFunction = _XDefaultIOError;
     82     }
     83     _XUnlockMutex(_Xglobal_lock);
     84 
     85     return (XIOErrorHandler) oldhandler;
     86 }
     87 
     88 /*
     89  * XSetIOErrorExitHandler - This procedure sets the X fatal I/O error
     90  * exit function to be the specified routine. If NULL is passed in
     91  * the original error exit function is restored. The default routine
     92  * calls exit(3).
     93  */
     94 void
     95 XSetIOErrorExitHandler(
     96     Display *dpy,
     97     XIOErrorExitHandler handler,
     98     void *user_data)
     99 {
    100     LockDisplay(dpy);
    101 
    102     if (handler != NULL) {
    103 	dpy->exit_handler = handler;
    104 	dpy->exit_handler_data = user_data;
    105     }
    106     else {
    107 	dpy->exit_handler = _XDefaultIOErrorExit;
    108 	dpy->exit_handler_data = NULL;
    109     }
    110     UnlockDisplay(dpy);
    111 }
    112