List options in --help output

diff --git a/vbig.cc b/vbig.cc
index c0e6439cc497044454c7bf449dfa5f4f0e6e65af..eeea02a0c7e0c28ff2d35f51b35a909ab1525b0f 100644 (file)
--- a/vbig.cc
+++ b/vbig.cc
@@ -19,7 +19,14 @@ static void help(void) {
   printf("vbig - create or verify a large but pseudo-random file\n"
          "\n"
          "Usage:\n"
-         "  vbig [--seed SEED] --verify|--create PATH SIZE\n");
+         "  vbig [--seed SEED] --verify|--create PATH SIZE\n"
+         "\n"
+         "Options:\n"
+         "  --seed         Specify random seed\n"
+         "  --verify       Verify that PATH contains the expected contents\n"
+         "  --create       Create PATH with psuedo-random contents\n"
+         "  --help         Display usage message\n"
+         "  --version      Display version string\n");
 }
 
 enum mode_type {