GCP2.0 Device: Help message

BUG=

Review URL: https://chromiumcodereview.appspot.com/21407002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@215477 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 31 insertions, 0 deletions

diff --git a/cloud_print/gcp20/prototype/gcp20_device.cc b/cloud_print/gcp20/prototype/gcp20_device.cc
index 31025ab..e26d45a 100644
--- a/cloud_print/gcp20/prototype/gcp20_device.cc
+++ b/cloud_print/gcp20/prototype/gcp20_device.cc
@@ -16,6 +16,31 @@
 
 namespace {
 
+const char kHelpMessage[] =
+    "usage: gcp20_device [switches] [options]\n"
+    "\n"
+    "switches:\n"
+    "  --disable-confirmation    disables confirmation of registration\n"
+    "  --disable-method-check    disables HTTP method checking (POST, GET)\n"
+    "  --disable-x-token         disables checking of X-Privet-Token "
+                                "HTTP header\n"
+    "  -h, --help                prints this message\n"
+    "  --no-announcement         disables DNS announcements\n"
+    "  --multicast-respond       DNS responses will be sent in multicast "
+                                "instead of unicast\n"
+    "\n"
+    "options:\n"
+    "  --domain-name=<name>      sets, should ends with '.local'\n"
+    "  --http-port=<value>       sets port for HTTP server\n"
+    "  --service-name=<name>     sets DNS service name\n"
+    "  --ttl=<value>             sets TTL for DNS announcements\n"
+    "\n"
+    "WARNING: mDNS probing is not implemented\n";
+
+void PrintHelp() {
+  printf("%s", kHelpMessage);
+}
+
 void StartPrinter(Printer* printer) {
   bool success = printer->Start();
   DCHECK(success);
@@ -48,6 +73,12 @@ int main(int argc, char* argv[]) {
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   logging::InitLogging(settings);
 
+  if (CommandLine::ForCurrentProcess()->HasSwitch("h") ||
+      CommandLine::ForCurrentProcess()->HasSwitch("help")) {
+    PrintHelp();
+    return 0;
+  }
+
   signal(SIGINT, OnAbort);  // Handle Ctrl+C signal.
 
   base::MessageLoop loop(base::MessageLoop::TYPE_IO);