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170 lines
3.5 KiB
170 lines
3.5 KiB
/*
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* Disktest
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* Copyright (c) International Business Machines Corp., 2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Please send e-mail to yardleyb@us.ibm.com if you have
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* questions or comments.
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*
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* Project Website: TBD
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*
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* $Id: signals.c,v 1.1 2008/02/14 08:22:23 subrata_modak Exp $
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*/
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#ifdef WINDOWS
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#include <windows.h>
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#else
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#include <pthread.h>
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#endif
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#include <signal.h>
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#include "threading.h"
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#include "signals.h"
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/*
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* global variable used to indicate what signal
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* (if any) has been caught
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*/
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int handled_signal = -1;
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int signal_action = SIGNAL_NONE;
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/*
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* mutex to be used whenever accessing the above
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* global data
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*/
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#ifdef WINDOWS
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HANDLE sig_mutex;
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#else
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pthread_mutex_t sig_mutex = PTHREAD_MUTEX_INITIALIZER;
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#endif
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#ifdef WINDOWS
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void sig_handler(int sig)
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#else
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void *sig_handler(void *arg)
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#endif
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{
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#ifndef WINDOWS
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sigset_t signal_set;
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int sig;
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int rv;
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/* wait for any and all signals */
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sigfillset(&signal_set);
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#ifdef AIX
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/* except in AIX, can't sigwait on this signals */
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sigdelset(&signal_set, SIGKILL);
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sigdelset(&signal_set, SIGWAITING);
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sigdelset(&signal_set, SIGSTOP);
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#endif
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for (;;) {
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rv = sigwait(&signal_set, &sig);
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#endif
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switch (sig) {
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case SIGQUIT:
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LOCK(sig_mutex);
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handled_signal = SIGQUIT;
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signal_action |= SIGNAL_STOP;
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UNLOCK(sig_mutex);
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break;
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case SIGINT:
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LOCK(sig_mutex);
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handled_signal = SIGINT;
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signal_action |= SIGNAL_STOP;
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UNLOCK(sig_mutex);
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break;
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case SIGTERM:
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LOCK(sig_mutex);
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handled_signal = SIGTERM;
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signal_action |= SIGNAL_STOP;
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UNLOCK(sig_mutex);
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break;
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case SIGHUP:
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LOCK(sig_mutex);
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handled_signal = SIGHUP;
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signal_action |= SIGNAL_STOP;
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UNLOCK(sig_mutex);
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break;
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case SIGUSR1:
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LOCK(sig_mutex);
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handled_signal = SIGUSR1;
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signal_action |= SIGNAL_STAT;
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UNLOCK(sig_mutex);
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break;
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/* whatever you need to do for other signals */
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default:
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LOCK(sig_mutex);
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handled_signal = 0;
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UNLOCK(sig_mutex);
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break;
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}
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#ifndef WINDOWS
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}
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return NULL;
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#endif
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}
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void setup_sig_mask(void)
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{
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#ifndef WINDOWS
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sigset_t signal_set;
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pthread_t sig_thread;
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#endif
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#ifdef WINDOWS
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if ((sig_mutex = CreateMutex(NULL, FALSE, NULL)) == NULL) {
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return;
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}
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#endif
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/* block all signals */
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#ifdef WINDOWS
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signal(SIGINT, sig_handler);
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signal(SIGTERM, sig_handler);
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signal(SIGUSR1, sig_handler);
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#else
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sigemptyset(&signal_set);
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sigaddset(&signal_set, SIGINT);
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sigaddset(&signal_set, SIGHUP);
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sigaddset(&signal_set, SIGQUIT);
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sigaddset(&signal_set, SIGTERM);
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sigaddset(&signal_set, SIGUSR1);
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#ifdef AIX
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sigthreadmask(SIG_SETMASK, &signal_set, NULL);
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#else
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pthread_sigmask(SIG_SETMASK, &signal_set, NULL);
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#endif
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/* create the signal handling thread */
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pthread_create(&sig_thread, NULL, sig_handler, NULL);
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#endif
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}
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void clear_stat_signal(void)
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{
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if (signal_action & SIGNAL_STAT) {
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LOCK(sig_mutex);
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signal_action &= ~SIGNAL_STAT;
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UNLOCK(sig_mutex);
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}
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}
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