Add delay between attempts

1 files changed, 3 insertions, 2 deletions

diff --git a/zup.c b/zup.c
index 5fe1e61..e7f8fe6 100644
--- a/zup.c
+++ b/zup.c
@@ -128,7 +128,7 @@ parse_options(int argc, char *const argv[])
         case 'a':
             errno = 0;
             param.max_attempts = strtoul(optarg, NULL, 10);
-            if (errno) {
+            if (errno || !optarg || strlen(optarg) == 0) {
                 perror("Invalid attempts number\n");
                 exit(EXIT_FAILURE);
             }
@@ -232,7 +232,8 @@ struct param param = {
     .verbose = 0,
     .human_readable = 0,
     .repl = 0,
-    .show_progress = 0
+    .show_progress = 0,
+    .max_attempts = 5
 };
 
 // TODO: Support stdin/stdout