From 563a442d63bab474b554453c6c3ccf10e3a5b48d Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Tue, 5 Jun 2012 15:03:26 +0100
Subject: [PATCH] Add --help and add --list to manpage

---
 errno.c       | 12 ++++++++++++
 errno.docbook | 15 +++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/errno.c b/errno.c
index f1e2285..3b981ce 100644
--- a/errno.c
+++ b/errno.c
@@ -74,10 +74,18 @@ report_from_code(int code)
 
 static struct option
 options[] = {
+    { "help", 0, NULL, 'h' },
     { "list", 0, NULL, 'l' },
 };
 
 
+static void
+usage(void)
+{
+    printf("Usage: errno [-l] [--list] [keyword]\n");
+}
+
+
 int 
 main(int argc, char **argv)
 {
@@ -92,6 +100,10 @@ main(int argc, char **argv)
             break;
             
         switch (c) {
+        case 'h':
+            usage();
+            return EXIT_SUCCESS;
+
         case 'l':
             mode = list_mode;
             break;
diff --git a/errno.docbook b/errno.docbook
index 0f3c241..64fd488 100644
--- a/errno.docbook
+++ b/errno.docbook
@@ -70,6 +70,21 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 		
 	</refsect1>
 	
+	<refsect1>
+        <title>OPTIONS</title>
+        
+        <variablelist>
+            <varlistentry>
+                <term><option>-l</option></term>
+                <term><option>--list</option></term>
+                <listitem>
+                    <para>List all errno values.</para>
+                </listitem>
+            </varlistentry>
+        </variablelist>
+
+	</refsect1>
+	
 	<refsect1>
 		<title>AUTHOR</title>
 			Lars Wirzenius
-- 
2.39.5