130 lines
4.4 KiB
C
Executable File
130 lines
4.4 KiB
C
Executable File
/*
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* Copyright (c) 2013-2016, Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific
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* 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 HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "guest_signal.h"
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "guest_limits.h"
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#include "guest_types.h"
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#include "guest_debug.h"
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typedef struct {
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bool inuse;
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int signum;
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GuestSignalHandlerT handler;
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} GuestSignalT;
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static GuestSignalT _signal[GUEST_MAX_SIGNALS];
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// ****************************************************************************
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// Guest Signal - Map
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// ==================
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static GuestSignalT* guest_signal_map( int signum )
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{
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switch (signum)
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{
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case SIGINT: return &(_signal[0]);
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case SIGTERM: return &(_signal[1]);
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case SIGQUIT: return &(_signal[2]);
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case SIGHUP: return &(_signal[3]);
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case SIGCHLD: return &(_signal[4]);
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case SIGCONT: return &(_signal[5]);
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case SIGPIPE: return &(_signal[6]);
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case SIGIO: return &(_signal[7]);
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default:
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DPRINTFE("Mapping for signal %i missing.", signum);
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}
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return NULL;
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}
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// ****************************************************************************
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// ****************************************************************************
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// Guest Signal - Handler
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// ======================
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static void guest_signal_handler( int signum )
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{
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GuestSignalT* entry;
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DPRINTFD("Signal %i received.", signum);
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entry = guest_signal_map(signum);
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if (NULL != entry)
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if (entry->inuse)
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if (NULL != entry->handler)
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entry->handler(signum);
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}
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// ****************************************************************************
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// ****************************************************************************
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// Guest Signal - Register Handler
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// ===============================
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void guest_signal_register_handler( int signum, GuestSignalHandlerT handler )
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{
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GuestSignalT* entry;
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entry = guest_signal_map(signum);
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if (NULL != entry)
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{
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entry->inuse = true;
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entry->signum = signum;
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entry->handler = handler;
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signal(signum, guest_signal_handler);
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}
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}
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// ****************************************************************************
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// ****************************************************************************
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// Guest Signal - Deregister Handler
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// =================================
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void guest_signal_deregister_handler( int signum )
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{
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GuestSignalT* entry;
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entry = guest_signal_map(signum);
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if (NULL != entry)
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{
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memset(entry, 0, sizeof(GuestSignalT));
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signal(signum, SIG_DFL);
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}
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}
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// ****************************************************************************
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// ****************************************************************************
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// Guest Signal - Ignore
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// =====================
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void guest_signal_ignore( int signum )
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{
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guest_signal_deregister_handler(signum);
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signal(signum, SIG_IGN);
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}
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// ****************************************************************************
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