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-rw-r--r--lib/sigevent.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/lib/sigevent.c b/lib/sigevent.c
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+++ b/lib/sigevent.c
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+/* Quagga signal handling functions.
+ * Copyright (C) 2004 Paul Jakma,
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <zebra.h>
+#include <sigevent.h>
+#include <log.h>
+
+struct quagga_sigevent_master_t
+{
+ struct thread_master *tm;
+ struct thread *t;
+
+ struct quagga_signal_t *signals;
+ int sigc;
+
+} sigmaster;
+
+/* Generic signal handler
+ * Schedules signal event thread
+ */
+void
+quagga_signal_handler (int signo)
+{
+ int i;
+ struct quagga_signal_t *sig;
+
+ for (i = 0; i < sigmaster.sigc; i++)
+ {
+ sig = &(sigmaster.signals[i]);
+
+ if (sig->signal == signo)
+ sig->caught++;
+ }
+}
+
+int
+quagga_signal_timer (struct thread *t)
+{
+ sigset_t newmask, oldmask;
+ struct quagga_sigevent_master_t *sigm;
+ struct quagga_signal_t *sig;
+ int i;
+
+ sigm = THREAD_ARG (t);
+
+ /* block all signals */
+ sigfillset (&newmask);
+ if ( (sigprocmask (SIG_BLOCK, &newmask, &oldmask)) < 0)
+ {
+ zlog_err ("quagga_signal_timer: couldnt block signals!");
+ sigm->t = thread_add_timer (sigm->tm, quagga_signal_timer,
+ &sigmaster, QUAGGA_SIGNAL_TIMER_INTERVAL);
+ return -1;
+ }
+
+ for (i = 0; i < sigm->sigc; i++)
+ {
+ sig = &(sigm->signals[i]);
+ if (sig->caught > 0)
+ {
+ sig->caught = 0;
+ sig->handler();
+ }
+ }
+
+ sigm->t = thread_add_timer (sigm->tm, quagga_signal_timer, &sigmaster,
+ QUAGGA_SIGNAL_TIMER_INTERVAL);
+
+ if ( sigprocmask (SIG_UNBLOCK, &oldmask, NULL) < 0 );
+ return -1;
+
+ return 0;
+}
+
+/* Initialization of signal handles. */
+/* Signale wrapper. */
+int
+signal_set (int signo)
+{
+ int ret;
+ struct sigaction sig;
+ struct sigaction osig;
+
+ sig.sa_handler = &quagga_signal_handler;
+ sigfillset (&sig.sa_mask);
+ sig.sa_flags = 0;
+ if (signo == SIGALRM) {
+#ifdef SA_INTERRUPT
+ sig.sa_flags |= SA_INTERRUPT; /* SunOS */
+#endif
+ } else {
+#ifdef SA_RESTART
+ sig.sa_flags |= SA_RESTART;
+#endif /* SA_RESTART */
+ }
+
+ ret = sigaction (signo, &sig, &osig);
+ if (ret < 0)
+ return ret;
+ else
+ return 0;
+}
+
+void
+signal_init (struct thread_master *m,
+ int sigc, struct quagga_signal_t signals[])
+{
+
+ int i = 0;
+ struct quagga_signal_t *sig;
+
+ while (i < sigc)
+ {
+ sig = &signals[i];
+ if ( signal_set (sig->signal) < 0 )
+ exit (-1);
+ i++;
+ }
+
+ sigmaster.sigc = sigc;
+ sigmaster.signals = signals;
+ sigmaster.tm = m;
+
+ sigmaster.t =
+ thread_add_timer (m, quagga_signal_timer, &sigmaster,
+ QUAGGA_SIGNAL_TIMER_INTERVAL);
+
+}
+