}
/**
- * Wrapper around signal(2).
+ * Install the given handler for the given signal.
*
* \param sig The number of the signal to catch.
+ * \param handler to be installed, \p SIG_IGN, or \p SIG_DFL.
*
- * This installs the generic signal handler for the given signal.
+ * This either succeeds or calls exit(EXIT_FAILURE).
*
- * \return This function returns 1 on success and \p -E_SIGNAL_SIG_ERR on errors.
- *
- * \sa signal(2).
+ * \sa sigaction(2).
*/
-int para_install_sighandler(int sig)
+void para_sigaction(int sig, void (*handler)(int))
{
+ struct sigaction act;
+
PARA_DEBUG_LOG("catching signal %d\n", sig);
- return signal(sig, &generic_signal_handler) == SIG_ERR? -E_SIGNAL_SIG_ERR : 1;
+ act.sa_handler = handler;
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = 0;
+ if (sig == SIGALRM) {
+ #ifdef SA_INTERRUPT /* SunOS */
+ act.sa_flags |= SA_INTERRUPT;
+ #endif
+ } else {
+ #ifdef SA_RESTART /* BSD */
+ act.sa_flags |= SA_RESTART;
+ #endif
+ }
+ if (sigaction(sig, &act, NULL) >= 0)
+ return;
+ PARA_EMERG_LOG("failed to install signal handler for signal %d\n",
+ sig);
+ exit(EXIT_FAILURE);
+}
+
+/**
+ * Install the generic signal handler for the given signal number.
+ *
+ * \param sig The number of the signal to catch.
+ *
+ * \sa signal(2), sigaction(2).
+ */
+void para_install_sighandler(int sig)
+{
+ para_sigaction(sig, &generic_signal_handler);
}
/**