Added helpful hints

cmd/shell.c

@@ -8,6 +8,8 @@ int main() {
 	int status_return = 0;
 	char *cmd;
 	char **args;
+	int numFail = 0;
+	int numSuccess = 0;
 
 	init_shell();
 
@@ -18,6 +20,25 @@ int main() {
 
 		free(cmd);
 		free(args);
+
+		// Check exit status for feedback
+		if ( status_return > 0 ) {
+			numFail++;
+			// Check for fail help messages
+			if ( numFail == 2 ) {
+				printf("Have you read the output of the `author` command?\n");
+			} else if ( numFail == 10 ) {
+				printf("Maybe we try typing backwards?\n");
+			}
+		} else if ( status_return == 0 ) {
+			numSuccess++;
+			// Check for success help messages
+			if ( numSuccess == 4 ) {
+				printf("Might be worth trying to figure out why this is your shell?\n");
+			} else if ( numSuccess == 10 ) {
+				printf("Random trivia: Shells are defined in /etc/passwd\n");
+			}
+		} // else command was NULL and skip
 	} while(status_return != 255);
 	return EXIT_SUCCESS;
 }