109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/* exception.c
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*
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* $Id$
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*
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* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
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* Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
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*
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* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
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* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
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* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
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* between TELES and Nixdorf Microprocessor Engineering, Berlin).
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*
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* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
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* owners or individual owners of copyright in this software, grant to any
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* person or company a worldwide, royalty free, license to
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*
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* i) copy this software,
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* ii) prepare derivative works based on this software,
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* iii) distribute copies of this software or derivative works,
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* iv) perform this software, or
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* v) display this software,
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*
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* provided that this notice is not removed and that neither Oliver Laumann
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* nor Teles nor Nixdorf are deemed to have made any representations as to
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* the suitability of this software for any purpose nor are held responsible
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* for any defects of this software.
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*
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* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include "kernel.h"
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extern void Reset () elk_attribute(__noreturn__);
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int Intr_Was_Ignored;
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unsigned long int Intr_Level;
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#if defined(HAVE_SIGPROCMASK)
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sigset_t Sigset_Old, Sigset_Block;
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#elif defined(HAVE_SIGBLOCK)
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int Sigmask_Old, Sigmask_Block;
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#endif
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static Object V_Interrupt_Handler;
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/* Make sure temp files are removed on hangup and broken pipe.
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*/
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/*ARGSUSED*/
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void Signal_Exit (int sig) {
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Exit_Handler ();
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exit (1);
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}
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void Init_Exception () {
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Define_Variable (&V_Interrupt_Handler, "interrupt-handler", Null);
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#if defined(HAVE_SIGPROCMASK)
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sigemptyset (&Sigset_Block);
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sigaddset (&Sigset_Block, SIGINT);
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(void)sigprocmask (0, (sigset_t *)0, &Sigset_Old);
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#elif defined(HAVE_SIGBLOCK)
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Sigmask_Block = sigmask (SIGINT);
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Sigmask_Old = sigblock (0);
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#endif
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#ifdef SIGHUP
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(void)signal (SIGHUP, Signal_Exit);
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#endif
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#ifdef SIGPIPE
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(void)signal (SIGPIPE, Signal_Exit);
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#endif
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}
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/*ARGSUSED*/
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void Intr_Handler (int sig) {
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Object fun;
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#if defined(HAVE_SIGPROCMASK) || ! defined(HAVE_SIGBLOCK)
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(void)signal (SIGINT, Intr_Handler);
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#endif
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Set_Error_Tag ("interrupt-handler");
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Reset_IO (1);
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fun = Var_Get (V_Interrupt_Handler);
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if (TYPE(fun) == T_Compound && COMPOUND(fun)->min_args == 0)
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(void)Funcall (fun, Null, 0);
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Format (Curr_Output_Port, "~%\7Interrupt!~%", 15, 0, (Object *)0);
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Reset ();
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/*NOTREACHED*/
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}
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void Install_Intr_Handler () {
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if (signal (SIGINT, SIG_IGN) == SIG_IGN)
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Intr_Was_Ignored = 1;
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else
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(void)signal (SIGINT, Intr_Handler);
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}
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Object P_Disable_Interrupts () {
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Disable_Interrupts;
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return Make_Unsigned_Long (Intr_Level);
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}
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Object P_Enable_Interrupts () {
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Enable_Interrupts;
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return Make_Unsigned_Long (Intr_Level);
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}
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