Print help when no arguments supplied to minideflate.

diff --git a/test/minideflate.c b/test/minideflate.c
index 44c79e3fc185b52df939aec338cc00ce0f062b71..0c452635ff92a255573194b2ecc1db90a12bdf19 100644 (file)
--- a/test/minideflate.c
+++ b/test/minideflate.c
@@ -241,6 +241,12 @@ int main(int argc, char **argv) {
     FILE *fin = stdin;
     FILE *fout = stdout;
 
+
+    if (argc == 1) {
+        show_help();
+        return 64;   /* EX_USAGE */
+    }
+
     for (i = 1; i < argc; i++) {
         if ((strcmp(argv[i], "-m") == 0) && (i + 1 < argc))
             mem_level = atoi(argv[++i]);