#!/bin/sh
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#
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# Answer the question: what distro are we installing.
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#
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# Copyright (C) 2010, Cisco Systems Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Ngie Cooper, January 2010
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#
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#
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error() {
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echo "${0##*/}: ERROR: $*" >&2
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}
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destdir=
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omit_redhat_minor_version=0
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while getopts "d:m" opt; do
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case "$opt" in
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d)
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if [ ! -d "$OPTARG" ] ; then
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error "$OPTARG doesn't exist"
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exit 1
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fi
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destdir=$OPTARG
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;;
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m)
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omit_redhat_minor_version=1
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;;
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esac
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done
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etc_dir="$destdir/etc"
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if [ ! -d "$etc_dir" ] ; then
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error "$etc_dir doesn't exist"
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exit 1
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fi
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#
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# Precedence list for files to look through for version info...
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#
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# XXX (garrcoop): add more..
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#
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for i in gentoo-release redhat-release; do
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if [ -f "$etc_dir/$i" ] ; then
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DISTRO_RELEASE_FILE="$i"
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break
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fi
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done
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if [ "x$DISTRO_RELEASE_FILE" = x ] ; then
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error "Couldn't determine distro release file"
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error "Please send an email with your distro's details, if you believe this is in error"
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exit 1
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else
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DISTRO_RELEASE_ABS_FILE="$etc_dir/$DISTRO_RELEASE_FILE"
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case "$i" in
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gentoo-release)
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DISTRO=gentoo
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RELEASE_FORMAT_FILE=1
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;;
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redhat-release)
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RELEASE_FORMAT_FILE=1
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if grep -q '^Red Hat' "$DISTRO_RELEASE_ABS_FILE"; then
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DISTRO=redhat
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elif grep -q '^Fedora' "$DISTRO_RELEASE_ABS_FILE"; then
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DISTRO=fedora
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else
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RELEASE_FORMAT_FILE=0
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fi
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;;
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esac
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if [ $RELEASE_FORMAT_FILE -eq 1 ] ; then
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set -- $(cat "$DISTRO_RELEASE_ABS_FILE")
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while [ 1 ] ; do
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shift
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if [ $# -eq 0 -o "x$1" = "xrelease" ] ; then
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if [ "x$1" = "xrelease" ] ; then
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shift
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fi
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break
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fi
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done
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case "$DISTRO" in
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gentoo)
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VERSION=$1
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;;
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fedora|redhat)
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MAJOR_VER=$1
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if [ $omit_redhat_minor_version -eq 0 ] && echo "$@" | grep -q '\(.*Update.*\)'; then
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MINOR_VER=$(echo "$@" | sed -e 's/[\(\)]//g' -e 's/.*Update //')
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fi
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VERSION="$MAJOR_VER${MINOR_VER:+.${MINOR_VER}}"
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;;
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esac
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fi
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if [ "x$VERSION" = x ] ; then
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error "Bad release file: $etc_dir/$DISTRO_RELEASE_FILE"
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exit 2
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else
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echo "$DISTRO-$VERSION"
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fi
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fi
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