Add a vigr(8) utility which does for /etc/group what vipw(8) does for

/etc/master.passwd.

1 files changed, 95 insertions, 0 deletions

diff --git a/usr.sbin/vigr/vigr.sh b/usr.sbin/vigr/vigr.sh
new file mode 100644
index 0000000..c5dc65d
--- /dev/null
+++ b/usr.sbin/vigr/vigr.sh
@@ -0,0 +1,95 @@
+#!/bin/sh
+#-
+# Copyright (c) 2014 Dag-Erling Smørgrav
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+error() {
+	echo "$@" >&2
+	exit 1
+}
+
+usage() {
+	error "usage: vigr [-d dir]"
+}
+
+# Check arguments
+while getopts d: opt ; do
+	case $opt in
+	d)
+		etcdir="${OPTARG}"
+		;;
+	*)
+		usage
+		;;
+	esac
+done
+
+# Look for the current group file
+grpfile="${etcdir:-/etc}/group"
+if [ ! -f "${grpfile}" ] ; then
+	error "Missing group file"
+fi
+
+# Create a secure temporary working directory
+tmpdir=$(mktemp -d -t vigr)
+if [ -z "${tmpdir}" -o ! -d "${tmpdir}" ] ; then
+	error "Unable to create the temporary directory"
+fi
+tmpfile="${tmpdir}/group"
+
+# Clean up on exit
+trap "exit 1" INT
+trap "rm -rf '${tmpdir}'" EXIT
+set -e
+
+# Make a copy of the group file for the user to edit
+cp "${grpfile}" "${tmpfile}"
+
+while :; do
+	# Let the user edit the file
+	${EDITOR:-/usr/bin/vi} "${tmpfile}"
+
+	# If the result is valid, install it and exit
+	if chkgrp -q "${tmpfile}" ; then
+		install -b -m 0644 -C -S "${tmpfile}" "${grpfile}"
+		exit 0
+	fi
+
+	# If it is not, offer to re-edit
+	while :; do
+		echo -n "Re-edit the group file? "
+		read ans
+		case $ans in
+		[Yy]|[Yy][Ee][Ss])
+			break
+			;;
+		[Nn]|[Nn][Oo])
+			exit 1
+			;;
+		esac
+	done
+done