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- #!/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.
- #
- #
- 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
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