1 files changed, 85 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/08.5.c b/reference/C/CONTRIB/OR_USING_C/08.5.c
new file mode 100644
index 0000000..47b0402
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/08.5.c
@@ -0,0 +1,85 @@
+#include <signal.h>
+#include <setjmp.h>
+
+/*
+ * The environment for setjmp.
+ */
+jmp_buf env;
+
+main()
+{
+    int i;
+    char buf[16];
+    extern int timeout();
+
+    /*
+     * Inform the system we want to catch the
+     * alarm signal.
+     */
+    signal(SIGALRM, timeout);
+
+    /*
+     * The code inside the if gets executed the first
+     * time through setjmp, the code inside the else
+     * the second time.
+     */
+    if (setjmp(env) == 0) {
+        /*
+         * Issue a request for an alarm to be
+         * delivered in 15 seconds.
+         */
+        alarm(15);
+
+        /*
+         * Prompt for input.
+         */
+        printf("Type a word; if you don't in 15 ");
+        printf("seconds I'll use \"WORD\": ");
+        gets(buf);
+
+        /*
+         * Turn off the alarm.
+         */
+        alarm(0);
+    }
+    else {
+        /*
+         * Assume the default.
+         */
+        strcpy(buf, "WORD");
+    }
+
+    printf("\nThe word is: %s\n", buf);
+    exit(0);
+}
+
+/*
+ * timeout--catch the signal.
+ */
+timeout(sig)
+int sig;
+{
+    /*
+     * Ignore the signal for the duration of this
+     * routine.
+     */
+    signal(sig, SIG_IGN);
+
+    /*
+     * We would perform any timeout-related
+     * functions here; in this case there
+     * are none.
+     */
+
+    /*
+     * Restore the action of the alarm signal.
+     */
+    signal(SIGALRM, timeout);
+
+    /*
+     * Return to the main routine at setjmp,
+     * and make setjmp return 1.
+     */
+    longjmp(env, 1);
+}
+