keygen 'no option specified' detection

1 files changed, 7 insertions, 0 deletions

diff --git a/keygen.c b/keygen.c
index 7e49a85..f3793ea 100644
--- a/keygen.c
+++ b/keygen.c
@@ -9,6 +9,7 @@ int main(int argc, char* argv[]) {
 	char* output;
 	int defout = 0;
 	int defbyte = 0;
+	int noopts = 0;
 	while ((opt = getopt(argc, argv, "b:o:")) != -1) {
 		switch (opt) {
 		case 'b':
@@ -23,8 +24,14 @@ int main(int argc, char* argv[]) {
 			fprintf(stderr, "Usage: %s [-b nbytes] [-o output] \n", argv[0]);
 			exit(EXIT_FAILURE);
 		}
+		if (noopts == 0) {
+			noopts = 1;
+		}
 	}
 
+	if(noopts == 0) {
+		printf("WARNING no option specified usign default values... \n");
+	}
 	if (nbytes < 0) {
 		printf("Negative byte value inserted! \n");
 		printf("Exiting... \n");