Add randarg utility source

randarg.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+/*
+ * Pick one command line argument at random.
+ */
+int
+main(int argc, char **argv)
+{
+	// Make sure there are arguments to choose from.
+	if (argc == 1) {
+		fprintf(stderr, "Usage: %s arg1 [arg2 [...]]\n", argv[0]);
+		return 1;
+	}
+
+	// Get time, including micro seconds.
+	struct timeval current;
+	if (gettimeofday(&current, NULL) == -1) {
+		fprintf(stderr, "Could not get time.\n");
+		return 1;
+	}
+
+	// Set a random seed.
+	srand(current.tv_sec + current.tv_usec);
+	int index = rand() % (argc - 1) + 1;
+
+	// Randomize from command line arguments.
+	fprintf(stdout, "%s", argv[index]);
+	return 0;
+}