From 13db49f0b2411d3c0d56ae7f3f0b32b071575b30 Mon Sep 17 00:00:00 2001 From: midipix Date: Fri, 24 Jan 2020 03:34:01 +0000 Subject: config.sub: initial implementation. --- src/config.sub | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100755 src/config.sub diff --git a/src/config.sub b/src/config.sub new file mode 100755 index 0000000..325531a --- /dev/null +++ b/src/config.sub @@ -0,0 +1,89 @@ +#!/bin/sh + +# config.sub: a neutral implementation for modern (cross-)systems. +# any-target: all are assumed to be supported, no door-keeper failures. + +# this file is covered by COPYING.BAUTOMAKE. + + +set -eu + +mb_script="$0" +mb_status=1 +mb_dstamp='2020-01-18' + +mb_target="${1:-}" +mb_extarg="${2:-}" + +export LC_ALL=C + + +config_usage() +{ + printf 'usage:\n' >&2 + printf '\t%s [OPTION]\n' "$mb_script" >&2 + printf '\t%s (cross-)target-alias\n\n' "$mb_script" >&2 + + printf 'Options:\n' >&2 + printf '\t%s\n' \ + '-h, --help' \ + '-t, --time-stamp' \ + '-v, --version' \ + >&2 + + printf '\nThis is a neutral config.sub implementation for modern (cross-)systems.' >&2 + printf '\nAll (cross-)targets are assumed to be supported, and there are no door-keeper failures.\n\n' >&2 + + printf 'pkgsite: https://git.foss21.org/bautomake\n' >&2 + printf 'pkgbugs: bugs.automake@foss21.org\n' >&2 + + exit ${mb_status} +} + + +for arg ; do + case "$arg" in + -h | --help) + mb_status=0 + config_usage + ;; + + -t | --time-stamp) + printf '%s\n' "$mb_dstamp" + exit 0 + ;; + + -v | --version) + printf 'foss21.org config.sub (%s)\n' "$mb_dstamp" + exit 0 + ;; + + -*) + printf '%s: the argument `%s is not supported.\n\n' "$mb_script" "$arg'" >&2 + exit 2 + esac +done + + +# required target argument +if [ -z "$mb_target" ]; then + config_usage +fi + +# no unused arguments +if [ -n "$mb_extarg" ]; then + mb_status=2 + config_usage +fi + +# validation +if [ "$mb_target" != ${mb_target%% *} ]; then + printf '%s: input error: target alias may not contain spaces.\n\n' "$mb_script" >&2 + exit 2 +fi + +# compatible output +printf '%s\n' "$mb_target" + +# all done +exit 0 -- cgit v1.2.3