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-rw-r--r--reference/C/CONTRIB/OR_USING_C/08.4.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/08.4.c b/reference/C/CONTRIB/OR_USING_C/08.4.c
new file mode 100644
index 0000000..3bcc96c
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/08.4.c
@@ -0,0 +1,47 @@
+#include <signal.h>
+
+main()
+{
+ /*
+ * Declare handler routine so we can use its
+ * name.
+ */
+ extern int handler();
+ /*
+ * Send signal to handler routine. Only do so
+ * if the signal is not already being ignored.
+ */
+ if (signal(SIGINT, SIG_IGN) != SIG_IGN)
+ signal(SIGINT, handler);
+ /*
+ * Loop here.
+ */
+ for (;;)
+ pause();
+}
+/*
+ * handler--handle the signal. sig is the signal
+ * number which interrupted us.
+ */
+handler(sig)
+int sig;
+{
+ /*
+ * Users of 4.2 and 4.3BSD systems should un-comment
+ * this line, which will make this program
+ * behave as if it were on a non-Berkeley
+ * system (we reset the signal by hand).
+ */
+ /* signal(sig, SIG_DFL); */
+ /*
+ * Ignore the signal for the duration of this
+ * routine.
+ */
+ signal(sig, SIG_IGN);
+ printf("OUCH\n");
+ /*
+ * Reset the signal to come here again.
+ */
+ signal(SIGINT, handler);
+}
+