1#! /bin/sh 2# Copyright (C) 2012-2021 Free Software Foundation, Inc. 3# 4# This program is free software; you can redistribute it and/or modify 5# it under the terms of the GNU General Public License as published by 6# the Free Software Foundation; either version 2, or (at your option) 7# any later version. 8# 9# This program is distributed in the hope that it will be useful, 10# but WITHOUT ANY WARRANTY; without even the implied warranty of 11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12# GNU General Public License for more details. 13# 14# You should have received a copy of the GNU General Public License 15# along with this program. If not, see <https://www.gnu.org/licenses/>. 16 17# Usage: is_newest FILE FILES 18# Fail if any file in FILES is newer than FILE, and print the list of 19# such files on the standard error. Resolve ties in favor of FILE. 20 21# NOTE: keep this file Bourne-compatible, for the sake of systems with 22# non-POSIX /bin/sh (like Solaris). 23 24set -u 25 26me=is_newest 27 28if test $# -lt 2; then 29 echo "$me: too few arguments" >&2 30 exit 2 31fi 32 33file=$1; shift 34newer_files=`find "$@" -prune -newer "$file"` || exit $? 35 36if test -n "$newer_files"; then 37 echo "$me: these files are newer than '$file':" >&2 38 for f in $newer_files; do echo "* $f" >&2; done 39 exit 1 40fi 41 42exit 0 43