Update usage message.

diff --git a/vbig.cc b/vbig.cc
index c0f6cb6a3e4f781a4fcc138d13e7e44ec9fc7b30..a71a42dfb5826f2c2277ceda01dae760df167ec4 100644 (file)
--- a/vbig.cc
+++ b/vbig.cc
@@ -52,7 +52,7 @@ 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 [OPTIONS] [--both|--verify|--create] PATH] [SIZE]\n"
          "\n"
          "Options:\n"
          "  --seed, -s        Specify random seed as string\n"
@@ -60,6 +60,7 @@ static void help(void) {
          "  --seed-length, -L Set (maximum) seed length to read from file\n"
          "  --verify, -v      Verify that PATH contains the expected contents\n"
          "  --create, -c      Create PATH with psuedo-random contents\n"
+         "  --both, -b        Do both create and verify (default)\n"
          "  --flush, -f       Flush cache\n"
          "  --entire, -e      Write until full; read until EOF\n"
          "  --progress, -p    Show progress as we go\n"