From 9986edce84aa149f9471cd504781aace45da0c93 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Mon, 4 Nov 2013 13:41:22 +0100
Subject: [PATCH] Add --version option to head(1) and tail(1)

---
 utils/tail.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/utils/tail.cpp b/utils/tail.cpp
index cafa752a..973a0fa1 100644
--- a/utils/tail.cpp
+++ b/utils/tail.cpp
@@ -27,6 +27,10 @@
 #include <error.h>
 #include <ctype.h>
 
+#if !defined(VERSIONSTR)
+#define VERSIONSTR "unknown version"
+#endif
+
 #ifdef HEAD
 #define TAIL false
 #else
@@ -123,7 +127,11 @@ void help(const char* argv0)
 
 void version(const char* argv0)
 {
-	printf("%s (sortix)\n", argv0);
+	FILE* fp = stdout;
+	fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
+	fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
+	fprintf(fp, "This is free software: you are free to change and redistribute it.\n");
+	fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
 }
 
 int main(int argc, char* argv[])