VLOG_DEFINE_THIS_MODULE(fatal_signal);
/* Signals to catch. */
+#ifndef _WIN32
static const int fatal_signals[] = { SIGTERM, SIGINT, SIGHUP, SIGALRM };
+#else
+static const int fatal_signals[] = { SIGTERM };
+#endif
/* Hooks to call upon catching a signal */
struct hook {
static size_t n_hooks;
static int signal_fds[2];
+static HANDLE wevent;
static volatile sig_atomic_t stored_sig_nr = SIG_ATOMIC_MAX;
static struct ovs_mutex mutex;
static void atexit_handler(void);
static void call_hooks(int sig_nr);
+#ifdef _WIN32
+static BOOL WINAPI ConsoleHandlerRoutine(DWORD dwCtrlType);
+#endif
/* Initializes the fatal signal handling module. Calling this function is
* optional, because calling any other function in the module will also
inited = true;
ovs_mutex_init_recursive(&mutex);
+#ifndef _WIN32
xpipe_nonblocking(signal_fds);
+#else
+ wevent = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (!wevent) {
+ char *msg_buf = ovs_lasterror_to_string();
+ VLOG_FATAL("Failed to create a event (%s).", msg_buf);
+ }
+
+ /* Register a function to handle Ctrl+C. */
+ SetConsoleCtrlHandler(ConsoleHandlerRoutine, true);
+#endif
for (i = 0; i < ARRAY_SIZE(fatal_signals); i++) {
int sig_nr = fatal_signals[i];
+#ifndef _WIN32
struct sigaction old_sa;
xsigaction(sig_nr, NULL, &old_sa);
&& signal(sig_nr, fatal_signal_handler) == SIG_ERR) {
VLOG_FATAL("signal failed (%s)", ovs_strerror(errno));
}
+#else
+ if (signal(sig_nr, fatal_signal_handler) == SIG_ERR) {
+ VLOG_FATAL("signal failed (%s)", ovs_strerror(errno));
+ }
+#endif
}
atexit(atexit_handler);
}
void
fatal_signal_handler(int sig_nr)
{
+#ifndef _WIN32
ignore(write(signal_fds[1], "", 1));
+#else
+ SetEvent(wevent);
+#endif
stored_sig_nr = sig_nr;
}
ovs_mutex_lock(&mutex);
+#ifndef _WIN32
VLOG_WARN("terminating with signal %d (%s)",
(int)sig_nr, signal_name(sig_nr, namebuf, sizeof namebuf));
+#else
+ VLOG_WARN("terminating with signal %d", (int)sig_nr);
+#endif
call_hooks(sig_nr);
/* Re-raise the signal with the default handling so that the program
fatal_signal_wait(void)
{
fatal_signal_init();
- poll_fd_wait(signal_fds[0], POLLIN);
+ poll_fd_wait_event(signal_fds[0], wevent, POLLIN);
+}
+
+void
+fatal_ignore_sigpipe(void)
+{
+#ifndef _WIN32
+ signal(SIGPIPE, SIG_IGN);
+#endif
}
static void
}
}
}
+
+#ifdef _WIN32
+BOOL WINAPI ConsoleHandlerRoutine(DWORD dwCtrlType)
+{
+ stored_sig_nr = SIGINT;
+ SetEvent(wevent);
+ return true;
+}
+#endif
\f
/* Files to delete on exit. */
static struct sset files = SSET_INITIALIZER(&files);