1 files changed, 45 insertions, 0 deletions
diff --git a/historic/update.c b/historic/update.c
new file mode 100644
index 000000000..0506df872
--- /dev/null
+++ b/historic/update.c
@@ -0,0 +1,45 @@
+/*
+ * update.c -- periodically sync the filesystems to disk
+ */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <limits.h>
+#include <signal.h>
+
+void alarm_handler(int sig)
+{
+}
+
+int main(int argc, char *argv[])
+{
+	int i;
+	int interval;
+	struct sigaction sa;
+	sigset_t empty_set;
+	sigset_t alarm_set;
+
+	interval = (argc > 1) ? atoi(argv[1]) : 30;
+	if (fork() > 0)
+		exit(0);
+	chdir("/");
+	for (i = 0; i < OPEN_MAX; i++)
+		close(i);
+	setsid();
+	sa.sa_handler = SIG_IGN;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;
+	sigaction(SIGTERM, &sa, NULL);
+	sigaction(SIGINT, &sa, NULL);
+	sa.sa_handler = alarm_handler;
+	sigaction(SIGALRM, &sa, NULL);
+	sigemptyset(&empty_set);
+	sigemptyset(&alarm_set);
+	sigaddset(&alarm_set, SIGALRM);
+	sigprocmask(SIG_BLOCK, &alarm_set, NULL);
+	for (;;) {
+		alarm(interval);
+		sigsuspend(&empty_set);
+		sync();
+	}
+}