Add sleep between wrong password attempts

This is required for #1

rdo.c

@@ -4,6 +4,7 @@
 #include <crypt.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <bsd/readpassphrase.h>
 
@@ -40,6 +41,10 @@ void runprog(int argc, char** argv) {
 }
 
 int main(int argc, char** argv) {
+	char username[64];
+	char wrong_pw_sleep[64];
+	unsigned int sleep_ms;
+
 	if (argc < 2)
 		errx(1, "Please specify a program to run");
 
@@ -54,9 +59,10 @@ int main(int argc, char** argv) {
 		runprog(argc, argv);
 		return 0;
 	}
-
+	
-	char username[64];
 	getconf(fp, "username", username, sizeof(username));
+	getconf(fp, "wrong_pw_sleep", wrong_pw_sleep, sizeof(wrong_pw_sleep));
+	sleep_ms = atoi(wrong_pw_sleep) * 1000;
 
 	struct passwd* p = getpwnam(username);
 	if (!p)
@@ -82,6 +88,7 @@ int main(int argc, char** argv) {
 			return 0;
 		}
 		
+		usleep(sleep_ms);
 		fprintf(stderr, "Wrong password.\n");
 		tries++;
 	}

rdo_sample.conf

@@ -1 +1,2 @@
 username=sw1tchbl4d3
+wrong_pw_sleep=1000