1 files changed, 61 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/05.3.c b/reference/C/CONTRIB/OR_USING_C/05.3.c
new file mode 100644
index 0000000..9457d07
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/05.3.c
@@ -0,0 +1,61 @@
+#include <sys/types.h>
+#include <sys/time.h>
+#include <stdio.h>
+
+main()
+{
+    int n, nfds;
+    char buf[32];
+    fd_set readfds;
+    struct timeval tv;
+
+    /*
+     * We will be reading from standard input (file
+     * descriptor 0), so we want to know when the
+     * user has typed something.
+     */
+    FD_ZERO(&readfds);
+    FD_SET(0, &readfds);
+
+    /*
+     * Set the timeout for 15 seconds.
+     */
+    tv.tv_sec = 15;
+    tv.tv_usec = 0;
+
+    /*
+     * Prompt for input.
+     */
+    printf("Type a word; if you don't in 15 ");
+    printf("seconds I'll use \"WORD\": ");
+    fflush(stdout);
+
+    /*
+     * Now call select.  We pass NULL for
+     * writefds and exceptfds, since we
+     * aren't interested in them.
+     */
+    nfds = select(1, &readfds, NULL, NULL, &tv);
+
+    /*
+     * Now we check the results.  If nfds is zero,
+     * then we timed out, and should assume the
+     * default.  Otherwise, if file descriptor 0
+     * is set in readfds, that means that it is
+     * ready to be read, and we can read something
+     * from it.
+     */
+    if (nfds == 0) {
+        strcpy(buf, "WORD");
+    }
+    else {
+        if (FD_ISSET(0, &readfds)) {
+            n = read(0, buf, sizeof(buf));
+            buf[n-1] = '\0';
+        }
+    }
+
+    printf("\nThe word is: %s\n", buf);
+    exit(0);
+}
+