From 7eab9358e84ce8cf0433dcdbd12415a7c0b811ad Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Tue, 19 Apr 2022 16:53:50 -0400
Subject: implement groups command

---
 Makefile  |  2 +-
 groups.sh | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 groups.sh

diff --git a/Makefile b/Makefile
index 25b98f8..42f565a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .POSIX:
 
-PROGRAMS=arch base64 factor hostid mktemp nproc pinky printenv readlink \
+PROGRAMS=arch base64 factor groups hostid mktemp nproc pinky printenv readlink \
 	seq shuf stat stdbuf sync tac uptime users vdir yes
 
 all: $(PROGRAMS)
diff --git a/groups.sh b/groups.sh
new file mode 100644
index 0000000..52606d2
--- /dev/null
+++ b/groups.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+if [ $# -eq 0 ]; then
+	exec id -Gn
+fi
+
+while [ $# -gt 0 ]; do
+	printf '%s : ' $1
+	id -Gn $1
+	shift
+done
-- 
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