Fix bugs in example programs: change argc == 0 to argc < 2

Signed-off-by: Aditya Deshpande <[email protected]>

programs/pkey/dh_genprime.c

@@ -71,7 +71,7 @@ int main(int argc, char **argv)
     mbedtls_ctr_drbg_init(&ctr_drbg);
     mbedtls_entropy_init(&entropy);
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/pkey/gen_key.c

@@ -200,7 +200,7 @@ int main(int argc, char *argv[])
     mbedtls_ctr_drbg_init(&ctr_drbg);
     memset(buf, 0, sizeof(buf));
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
 #if defined(MBEDTLS_ECP_C)

programs/pkey/key_app.c

@@ -103,7 +103,7 @@ int main(int argc, char *argv[])
     mbedtls_mpi_init(&D); mbedtls_mpi_init(&E); mbedtls_mpi_init(&DP);
     mbedtls_mpi_init(&DQ); mbedtls_mpi_init(&QP);
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto cleanup;

programs/pkey/key_app_writer.c

@@ -220,7 +220,7 @@ int main(int argc, char *argv[])
     mbedtls_mpi_init(&D); mbedtls_mpi_init(&E); mbedtls_mpi_init(&DP);
     mbedtls_mpi_init(&DQ); mbedtls_mpi_init(&QP);
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/ssl/ssl_client2.c

@@ -867,7 +867,7 @@ int main(int argc, char *argv[])
     mbedtls_test_enable_insecure_external_rng();
 #endif  /* MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         if (ret == 0) {
             ret = 1;

programs/ssl/ssl_mail_client.c

@@ -370,7 +370,7 @@ int main(int argc, char *argv[])
     mbedtls_pk_init(&pkey);
     mbedtls_ctr_drbg_init(&ctr_drbg);
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
 

programs/ssl/ssl_server2.c

@@ -1633,7 +1633,7 @@ int main(int argc, char *argv[])
     signal(SIGINT, term_handler);
 #endif
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         if (ret == 0) {
             ret = 1;

programs/util/pem2der.c

@@ -189,7 +189,7 @@ int main(int argc, char *argv[])
     memset(buf, 0, sizeof(buf));
     memset(der_buffer, 0, sizeof(der_buffer));
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/x509/cert_app.c

@@ -161,7 +161,7 @@ int main(int argc, char *argv[])
     memset(&cacrl, 0, sizeof(mbedtls_x509_crl));
 #endif
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/x509/cert_req.c

@@ -159,7 +159,7 @@ int main(int argc, char *argv[])
     mbedtls_ctr_drbg_init(&ctr_drbg);
     memset(buf, 0, sizeof(buf));
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/x509/cert_write.c

@@ -273,7 +273,7 @@ int main(int argc, char *argv[])
     mbedtls_x509_crt_init(&issuer_crt);
     memset(buf, 0, sizeof(buf));
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/x509/crl_app.c

@@ -70,7 +70,7 @@ int main(int argc, char *argv[])
      */
     mbedtls_x509_crl_init(&crl);
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;

programs/x509/req_app.c

@@ -70,7 +70,7 @@ int main(int argc, char *argv[])
      */
     mbedtls_x509_csr_init(&csr);
 
-    if (argc == 0) {
+    if (argc < 2) {
 usage:
         mbedtls_printf(USAGE);
         goto exit;