Example for chapter on UNIX signals

chp10/pause.c

@@ -0,0 +1,34 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* Handler for SIGINT */
+static void sigint_handler(int signo)
+{
+	/*
+	 * Technically, you shouldn't use printf(...) in a
+	 * signal handler, but it isn't the end of the
+	 * world. I'll discuss why in the section
+	 * "Reentrancy".
+	 */
+	printf("Caught SIGINT\n");
+	exit(EXIT_SUCCESS);
+}
+
+int main(void)
+{
+	/*
+	 * Register sigint_handler as our signal handler
+	 * for SIGINT.
+	 */
+	if (signal(SIGINT, sigint_handler) == SIG_ERR) {
+		fprintf(stderr, "Cannot handle SIGINT\n");
+		exit(EXIT_FAILURE);
+	}
+
+	for (;;) {
+		pause();
+	}
+	return EXIT_SUCCESS;
+}