// Copyright (c) 2014 The Chromium Embedded Framework Authors. All rights

// reserved. Use of this source code is governed by a BSD-style license that

// can be found in the LICENSE file.

#include "signal_restore_posix.h"

#include <signal.h>

#include <string.h>

// arraysize borrowed from base/macros.h

template <typename T, size_t N>

char (&ArraySizeHelper(T (&array)[N]))[N];

#define arraysize(array) (sizeof(ArraySizeHelper(array)))

namespace {

const int signals_to_restore[] =

{SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,

SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP, SIGPIPE};

struct sigaction signal_handlers[arraysize(signals_to_restore)];

} // namespace

void BackupSignalHandlers() {

struct sigaction sigact;

for (unsigned i = 0; i < arraysize(signals_to_restore); ++i) {

memset(&sigact, 0, sizeof(sigact));

sigaction(signals_to_restore[i], NULL, &sigact);

signal_handlers[i] = sigact;

}

}

void RestoreSignalHandlers() {

for (unsigned i = 0; i < arraysize(signals_to_restore); ++i) {

sigaction(signals_to_restore[i], &signal_handlers[i], NULL);

}

}