initial import

from
http://www.informit.com/store/programming-with-posix-threads-9780201633924

alarm.c

@@ -0,0 +1,34 @@
+/*
+ * alarm.c
+ *
+ * Simple synchronous alarm program. This is used as a
+ * reference for progressive examples of asynchronous
+ * alarm programs.
+ */
+#include "errors.h"
+
+int main (int argc, char *argv[])
+{
+    int seconds;
+    char line[128];
+    char message[64];
+
+    while (1) {
+        printf ("Alarm> ");
+        if (fgets (line, sizeof (line), stdin) == NULL) exit (0);
+        if (strlen (line) <= 1) continue;
+
+        /*
+         * Parse input line into seconds (%d) and a message
+         * (%64[^\n]), consisting of up to 64 characters
+         * separated from the seconds by whitespace.
+         */
+        if (sscanf (line, "%d %64[^\n]", 
+            &seconds, message) < 2) {
+            fprintf (stderr, "Bad command\n");
+        } else {
+            sleep (seconds);
+            printf ("(%d) %s\n", seconds, message);
+        }
+    }
+}