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#! /bin/sh
# $Id$
# vim:et:ft=sh:sts=2:sw=2
#
# Copyright 2008 Kate Ward. All Rights Reserved.
# Released under the LGPL (GNU Lesser General Public License)
#
# Author: kate.ward@forestent.com (Kate Ward)
#
# This library provides reusable functions that determine actual names and
# versions of installed shells and the OS. The library can also be run as a
# script if set execuatable.
VERSIONS_SHELLS='/bin/bash /bin/dash /bin/ksh /bin/pdksh /bin/sh /bin/zsh'
#------------------------------------------------------------------------------
# functions
#
versions_osName()
{
os_name_='unrecognized'
os_system_=`uname -s`
case ${os_system_} in
Cygwin) os_name_='Cygwin' ;;
Darwin) os_name_='Mac OS X' ;;
Linux) os_name_='Linux' ;;
SunOS) os_name_='Solaris' ;;
esac
echo ${os_name_}
unset os_name_ os_system_
}
versions_osVersion()
{
os_version_='unrecognized'
os_system_=`uname -s`
os_release_=`uname -r`
case ${os_system_} in
Cygwin) os_version_='unknown' ;;
Darwin)
major_='10'
sub_=`echo ${os_release_} |\
sed 's/^[0-9]*\.\([0-9]*\)\.[0-9]*$/\1/'`
case ${os_release_} in
8.*) minor_='4' ;;
9.*) minor_='5' ;;
*) minor_='X'; sub_='X' ;;
esac
os_version_="${major_}.${minor_}.${sub_}"
;;
Linux)
if [ -r '/etc/lsb-release' ]; then
os_version_=`. /etc/lsb-release && \
echo "${DISTRIB_ID:-}-${DISTRIB_RELEASE:-}"`
fi
if [ "${os_version_}" = '-' ]; then
os_version_=''
if [ -r '/etc/redhat-release' ]; then
os_version_=`cat /etc/redhat-release`
fi
fi
;;
SunOS) os_version_=`echo ${os_release_} |sed 's/[0-9]*\.\([0-9]*\)/\1/'` ;;
esac
echo ${os_version_}
unset os_name_ os_release_ os_version_ major_ minor_ sub_
}
versions_shellVersion()
{
shell_=$1
if [ ! -x "${shell_}" ]; then
echo 'not installed'
return
fi
version_=''
case ${shell_} in
*/sh)
# TODO(kward): fix this
## this could be one of any number of shells. try until one fits.
#version_=`versions_shell_bash ${shell_}`
## dash cannot be self determined yet
#[ -z "${version_}" ] && version_=`versions_shell_ksh ${shell_}`
## pdksh is covered in versions_shell_ksh()
#[ -z "${version_}" ] && version_=`versions_shell_zsh ${shell_}`
;;
*/bash) version_=`versions_shell_bash ${shell_}` ;;
*/dash)
# simply assuming Ubuntu Linux until somebody comes up with a better
# test. the following test will return an empty string if dash is not
# installed.
version_=`versions_shell_dash`
;;
*/ksh) version_=`versions_shell_ksh ${shell_}` ;;
*/pdksh) version_=`versions_shell_pdksh ${shell_}` ;;
*/zsh) version_=`versions_shell_zsh ${shell_}` ;;
*) version_='invalid'
esac
echo ${version_:-unknown}
unset shell_ version_
}
versions_shell_bash()
{
$1 --version 2>&1 |grep 'GNU bash' |sed 's/.*version \([^ ]*\).*/\1/'
}
versions_shell_dash()
{
dpkg -l |grep ' dash ' |awk '{print $3}'
}
versions_shell_ksh()
{
versions_shell_=$1
versions_version_=`strings ${versions_shell_} 2>&1 \
|grep Version \
|sed 's/^.*Version \(.*\)$/\1/;s/ s+ \$$//;s/ /-/g'`
[ -z "${versions_version_}" ] \
&& versions_version_=`versions_shell_pdksh ${versions_shell_}`
echo ${versions_version_}
unset versions_shell_ versions_version_
}
versions_shell_pdksh()
{
strings $1 2>&1 \
|grep 'PD KSH' \
|sed -e 's/.*PD KSH \(.*\)/\1/;s/ /-/g'
}
versions_shell_zsh()
{
echo 'echo ${ZSH_VERSION}' |$1
}
#------------------------------------------------------------------------------
# main
#
versions_main()
{
# treat unset variables as an error
set -u
os_name=`versions_osName`
os_version=`versions_osVersion`
echo "os: ${os_name} version: ${os_version}"
for shell in ${VERSIONS_SHELLS}; do
shell_version=`versions_shellVersion ${shell}`
echo "shell: ${shell} version: ${shell_version}"
done
}
if [ "`basename $0`" = 'versions' ]; then
versions_main "$@"
fi
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