Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtwm/WmSignal.c

@@ -0,0 +1,250 @@
+/* 
+ * (c) Copyright 1989, 1990, 1991, 1992 OPEN SOFTWARE FOUNDATION, INC. 
+ * ALL RIGHTS RESERVED 
+*/ 
+/* 
+ * Motif Release 1.2
+*/ 
+#ifdef REV_INFO
+#ifndef lint
+static char rcsid[] = "$XConsortium: WmSignal.c /main/6 1996/10/17 16:20:07 drk $"
+#endif
+#endif
+/*
+ * (c) Copyright 1987, 1988, 1989, 1990 HEWLETT-PACKARD COMPANY */
+
+/*
+ * Included Files:
+ */
+
+#include "WmGlobal.h" /* This should be the first include */
+#include <signal.h>
+
+
+/*
+ * include extern functions
+ */
+
+#include "WmFeedback.h"
+#include "WmFunction.h"
+
+
+/*
+ * Function Declarations:
+ */
+
+#include "WmSignal.h" 
+
+
+/*
+ * Global Variables:
+ */
+
+
+#ifdef WSM
+
+/*************************************<->*************************************
+ *
+ *  AbortWmSignalHandler ()
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function is called on receipt of a fatal signal. We reset
+ *  the keyboard focus to pointer root before aborting.
+ *
+ *************************************<->***********************************/
+static void
+AbortWmSignalHandler (int sig)
+{
+    struct sigaction sa;
+
+    /*
+     * Set input focus back to pointer root
+     */
+    XSetInputFocus(DISPLAY, PointerRoot, RevertToPointerRoot, CurrentTime);
+    XSync (DISPLAY, False);
+    XCloseDisplay (DISPLAY);
+
+    /*
+     * Invoke the default handler
+     */
+    (void) sigemptyset(&sa.sa_mask);
+    sa.sa_flags = 0;
+    sa.sa_handler = SIG_DFL;
+    (void) sigaction (sig, &sa, (struct sigaction *) 0);
+
+    kill (getpid(), sig);
+
+} /* END OF FUNCTION AbortSignalHandler */
+
+
+/*************************************<->*************************************
+ *
+ *  RestoreDefaultSignalHandlers ()
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function sets up the signal handlers for the window manager.
+ *
+ *************************************<->***********************************/
+
+void
+RestoreDefaultSignalHandlers (void)
+{
+    struct sigaction sa;
+    struct sigaction osa;
+
+    /*
+     * Restore default action for signals we're interested in.
+     */
+
+    (void) sigemptyset(&sa.sa_mask);
+    sa.sa_flags = 0;
+    sa.sa_handler = SIG_DFL;
+
+    if ((sigaction (SIGINT, (struct sigaction *) 0, &osa) != 0) ||
+	(osa.sa_handler != SIG_IGN))
+    {
+	(void) sigaction (SIGINT, &sa, (struct sigaction *) 0);
+    }
+
+    if ((sigaction (SIGHUP, (struct sigaction *) 0, &osa) != 0) ||
+	(osa.sa_handler != SIG_IGN))
+    {
+	(void) sigaction (SIGHUP, &sa, (struct sigaction *) 0);
+    }
+
+    (void) sigaction (SIGQUIT, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGTERM, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGPIPE, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGCHLD, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGILL, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGFPE, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGBUS, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGSEGV, &sa, (struct sigaction *) 0);
+#ifdef SIGSYS
+    (void) sigaction (SIGSYS, &sa, (struct sigaction *) 0);
+#endif
+}
+#endif /* WSM */
+
+
+/*************************************<->*************************************
+ *
+ *  SetupWmSignalHandlers ()
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function sets up the signal handlers for the window manager.
+ *
+ *************************************<->***********************************/
+
+void SetupWmSignalHandlers (int dummy)
+{
+    void (*signalHandler) ();
+
+#ifdef WSM
+    struct sigaction 	sa;
+    struct sigaction 	osa;
+
+    /*
+     * Catch software signals that we ask the user about
+     * before quitting.
+     */
+    (void) sigemptyset(&sa.sa_mask);
+    sa.sa_flags = 0;
+    sa.sa_handler = QuitWmSignalHandler;
+
+    if ((sigaction (SIGINT, (struct sigaction *) 0, &osa) != 0) ||
+	(osa.sa_handler != SIG_IGN))
+    {
+	(void) sigaction (SIGINT, &sa, (struct sigaction *) 0);
+    }
+
+    if ((sigaction (SIGHUP, (struct sigaction *) 0, &osa) != 0) ||
+	(osa.sa_handler != SIG_IGN))
+    {
+	(void) sigaction (SIGHUP, &sa, (struct sigaction *) 0);
+    }
+
+    (void) sigaction (SIGQUIT, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGTERM, &sa, (struct sigaction *) 0);
+
+    /*
+     * Ignore child death
+     */
+
+#ifdef SA_NOCLDWAIT
+    sa.sa_flags = SA_NOCLDWAIT;  /* Don't create zombies */
+#else
+    sa.sa_flags = 0;
+#endif
+    sa.sa_handler = SIG_IGN;
+    (void) sigaction (SIGCHLD, &sa, (struct sigaction *) 0);
+    sa.sa_flags = 0;
+
+    /* 
+     * Catch other fatal signals so we can reset the 
+     * keyboard focus to pointer root before aborting
+     */
+    sa.sa_handler = AbortWmSignalHandler;
+
+    (void) sigaction (SIGILL, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGFPE, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGBUS, &sa, (struct sigaction *) 0);
+    (void) sigaction (SIGSEGV, &sa, (struct sigaction *) 0);
+#ifdef SIGSYS
+    (void) sigaction (SIGSYS, &sa, (struct sigaction *) 0);
+#endif
+
+#else /* not WSM - original mwm code*/
+
+    signalHandler = (void (*)())signal (SIGINT, SIG_IGN);
+    if (signalHandler != (void (*)())SIG_IGN)
+    {
+	signal (SIGINT, QuitWmSignalHandler);
+    }
+
+    signalHandler = (void (*)())signal (SIGHUP, SIG_IGN);
+    if (signalHandler != (void (*)())SIG_IGN)
+    {
+	signal (SIGHUP, QuitWmSignalHandler);
+    }
+
+    signal (SIGQUIT, QuitWmSignalHandler);
+
+    signal (SIGTERM, QuitWmSignalHandler);
+#endif /* WSM */
+
+
+} /* END OF FUNCTION SetupWmSignalHandlers */
+
+
+/*************************************<->*************************************
+ *
+ *  QuitWmSignalHandler ()
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function is called on receipt of a signal that is to terminate the
+ *  window manager.
+ *
+ *************************************<->***********************************/
+
+void QuitWmSignalHandler (int dummy)
+{
+    if (wmGD.showFeedback & WM_SHOW_FB_KILL)
+    {
+	ConfirmAction (ACTIVE_PSD, QUIT_MWM_ACTION);
+	XFlush(DISPLAY);
+    }
+    else
+    {
+	Do_Quit_Mwm(False);
+    }
+
+} /* END OF FUNCTION QuitWmSignalHandler */