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1d611fefbe
are detected. - Modified function return values of 0 and -1 to use macros like OK, ERROR/SEEK_ERROR instead, to better convey what the purpose of these values is. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14922 87f5fb63-7c3d-0410-a384-fd976d0f7a62
147 lines
4.0 KiB
C
147 lines
4.0 KiB
C
/*
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* $Id: signal_raise.c,v 1.8 2005-04-24 08:46:37 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2005 by Olaf Barthel <olsen@sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SIGNAL_HEADERS_H
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#include "signal_headers.h"
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#endif /* _SIGNAL_HEADERS_H */
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/****************************************************************************/
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/* This table holds pointers to all signal handlers configured at a time. */
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signal_handler_t __signal_handler_table[NUM_SIGNALS] =
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{
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SIG_DFL, /* SIGABRT */
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SIG_DFL, /* SIGFPE */
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SIG_DFL, /* SIGILL */
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SIG_DFL, /* SIGINT */
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SIG_DFL, /* SIGSEGV */
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SIG_DFL /* SIGTERM */
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};
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/****************************************************************************/
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/* This holds a mask of all signals whose delivery is currently blocked.
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The sigaddset(), sigblock(), sigprocmask() and sigsetmask() functions
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modify or query it. */
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int __signals_blocked;
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/****************************************************************************/
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int
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raise(int sig)
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{
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static int local_signals_blocked;
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int result = ERROR;
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ENTER();
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SHOWVALUE(sig);
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assert( SIGABRT <= sig && sig <= SIGTERM );
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/* This has to be a well-known and supported signal. */
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if(sig < SIGABRT || sig > SIGTERM)
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{
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SHOWMSG("unknown signal number");
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__set_errno(EINVAL);
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goto out;
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}
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/* Can we deliver the signal? */
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if(FLAG_IS_CLEAR(__signals_blocked, (1 << sig)) &&
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FLAG_IS_CLEAR(local_signals_blocked, (1 << sig)))
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{
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signal_handler_t handler;
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/* Which handler is installed for this signal? */
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handler = __signal_handler_table[sig - SIGABRT];
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/* Should we ignore this signal? */
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if(handler != SIG_IGN)
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{
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/* Block delivery of this signal to prevent recursion. */
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SET_FLAG(local_signals_blocked,(1 << sig));
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/* The default behaviour is to drop into abort(), or do
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something very much like it. */
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if(handler == SIG_DFL)
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{
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SHOWMSG("this is the default handler");
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if(sig == SIGINT)
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{
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char break_string[80];
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/* Turn off ^C checking for good. */
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__check_abort_enabled = FALSE;
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Fault(ERROR_BREAK,NULL,break_string,(LONG)sizeof(break_string));
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__print_termination_message(break_string);
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SHOWMSG("bye, bye...");
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}
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/* Drop straight into abort(), which might call signal()
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again but is otherwise guaranteed to eventually
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land us in _exit(). */
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abort();
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}
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else
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{
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SHOWMSG("calling the handler");
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(*handler)(sig);
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SHOWMSG("done.");
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}
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/* Unblock signal delivery again. */
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CLEAR_FLAG(local_signals_blocked,(1 << sig));
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}
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}
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else
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{
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SHOWMSG("that signal is blocked");
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}
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result = OK;
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out:
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RETURN(result);
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return(result);
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}
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