From 0c70f7ee3605ade69047d3b3ee96091a1cd2123c Mon Sep 17 00:00:00 2001
From: DJ Lucas <dj@linuxfromscratch.org>
Date: Tue, 5 Dec 2017 22:09:33 -0600
Subject: [PATCH 1/2] Honor long options as well.

---
 examplar.cpp | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/examplar.cpp b/examplar.cpp
index 5d868b7..58d7ba8 100644
--- a/examplar.cpp
+++ b/examplar.cpp
@@ -22,6 +22,7 @@
 #include "src/json/json.h"
 #include "src/loaders/loaders.h"
 #include <unistd.h>
+#include <getopt.h>
 
 #include <syslog.h>
 
@@ -31,7 +32,7 @@
 
 void print_usage()
 {
-    printf("examplar [ -h ] [ -v ] [ -c CONFIG_PATH ]");
+    printf("examplar [ -h/--help ] [ -v/--verbose ] [ -c/--config CONFIG_PATH ]\n\n");
     exit(0);
 }
 
@@ -47,10 +48,28 @@ int main( int argc, char * argv[] )
     // -v verbose
     // -c CONFIG_FILE_PATH -- defaults to '/etc/Examplar/config.json'
 
-    while ( ( opt = getopt( argc, argv, "hvc:" ) ) != -1 )
+    while (1)
     {
-        switch(opt)
+        static struct option long_options[] =
         {
+            {"verbose", no_argument,      0, 'v'},
+            {"help", no_argument,         0, 'h'},
+            {"config", required_argument, 0, 'c'},
+            {0, 0}
+        };
+        int option_index = 0;
+
+        opt = getopt_long (argc, argv, "vhc:",
+                           long_options, &option_index);
+
+        if (opt == -1)
+          break;
+
+        switch (opt)
+        {
+            case 0:
+            if (long_options[option_index].flag !=0)
+                break;
             case 'h':
                 show_help = true;
             case 'v':
@@ -106,4 +125,4 @@ int main( int argc, char * argv[] )
 
     closelog();
     return 0;
-}
\ No newline at end of file
+}

From 221edee07c2cc3c2f8f366215fb5c38b5c9fd27d Mon Sep 17 00:00:00 2001
From: DJ Lucas <dj@linuxfromscratch.org>
Date: Tue, 5 Dec 2017 22:40:57 -0600
Subject: [PATCH 2/2] Forgot print_usage() on invalid option.

---
 examplar.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/examplar.cpp b/examplar.cpp
index 58d7ba8..654eb01 100644
--- a/examplar.cpp
+++ b/examplar.cpp
@@ -32,8 +32,7 @@
 
 void print_usage()
 {
-    printf("examplar [ -h/--help ] [ -v/--verbose ] [ -c/--config CONFIG_PATH ]\n\n");
-    exit(0);
+    printf("examplar [ -h | --help ] [ -v | --verbose ] [ -c | --config CONFIG_PATH ]\n\n");
 }
 
 int main( int argc, char * argv[] )
@@ -78,6 +77,9 @@ int main( int argc, char * argv[] )
             case 'c':
                 config_path = std::string(optarg);
                 break;
+            case '?':
+                print_usage();
+                exit(1);
             default:
                 break;
         }
@@ -86,6 +88,7 @@ int main( int argc, char * argv[] )
     if ( show_help == true )
     {
         print_usage();
+        exit(0);
     }
 
     setlogmask( LOG_UPTO( LOG_INFO ) );