commit a8bedc6ae3f6d610aa634445809835c26aaf16bc
author Yifan Hong <elsk@google.com> Fri Sep 08 18:00:31 2017 -0700
committer Yifan Hong <elsk@google.com> Thu Sep 14 13:40:27 2017 -0700
tree cbfdbeef473f3073d5b7172ddc5dbd78232a38ee
parent ded398e5b6530c4ced5bd42f9b75ca2caa527239

lshal: add HelpCommand

Add *Command::usage() function for each Command and let
Lshal class to call them.

Suppress output from getopt_long and write our own
error message to customized error stream (for testing).

Test: lshal_test
Test: lshal --help

Change-Id: I8f5847c84a3e01af29fa85871479cab3baeb5312

cmds/lshal/utils.h

diff --git a/cmds/lshal/utils.h b/cmds/lshal/utils.h
index 45b922c..1f680d5 100644
--- a/cmds/lshal/utils.h
+++ b/cmds/lshal/utils.h
@@ -29,6 +29,7 @@
 
 enum : unsigned int {
     OK                                      = 0,
+    // Return to Lshal::main to print help info.
     USAGE                                   = 1 << 0,
     NO_BINDERIZED_MANAGER                   = 1 << 1,
     NO_PASSTHROUGH_MANAGER                  = 1 << 2,