From 4da25a3fef38e233338414fb651aee9e3143efc1 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Wed, 17 Apr 2019 20:19:39 +0200
Subject: =?UTF-8?q?lib:=20add=20POSIX.1=E2=80=902017,=203.190=20Group=20Na?=
 =?UTF-8?q?me?=
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---
 lib/types.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/types.nix b/lib/types.nix
index 2efa5a68..ffae8c7b 100644
--- a/lib/types.nix
+++ b/lib/types.nix
@@ -542,6 +542,13 @@ rec {
     merge = mergeOneOption;
   };
 
+  # POSIX.1‐2017, 3.190 Group Name
+  groupname = mkOptionType {
+    name = "POSIX group name";
+    check = filename.check;
+    merge = mergeOneOption;
+  };
+
   # POSIX.1‐2017, 3.281 Portable Filename
   filename = mkOptionType {
     name = "POSIX portable filename";
-- 
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