#! /bin/sh # vim:et:ft=sh:sts=2:sw=2 # # Versions determines the versions of all installed shells. # # Copyright 2008-2020 Kate Ward. All Rights Reserved. # Released under the Apache 2.0 License. # # Author: kate.ward@forestent.com (Kate Ward) # https://github.com/kward/shlib # # 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 executable. # # Disable checks that aren't fully portable (POSIX != portable). # shellcheck disable=SC2006 ARGV0=`basename "$0"` LSB_RELEASE='/etc/lsb-release' VERSIONS_SHELLS='ash /bin/bash /bin/dash /bin/ksh /bin/mksh /bin/pdksh /bin/zsh /usr/xpg4/bin/sh /bin/sh /sbin/sh' true; TRUE=$? false; FALSE=$? ERROR=2 UNAME_R=`uname -r` UNAME_S=`uname -s` __versions_haveStrings=${ERROR} versions_osName() { os_name_='unrecognized' os_system_=${UNAME_S} os_release_=${UNAME_R} case ${os_system_} in CYGWIN_NT-*) os_name_='Cygwin' ;; Darwin) os_name_=`/usr/bin/sw_vers -productName` os_version_=`versions_osVersion` case ${os_version_} in 10.4|10.4.[0-9]*) os_name_='Mac OS X Tiger' ;; 10.5|10.5.[0-9]*) os_name_='Mac OS X Leopard' ;; 10.6|10.6.[0-9]*) os_name_='Mac OS X Snow Leopard' ;; 10.7|10.7.[0-9]*) os_name_='Mac OS X Lion' ;; 10.8|10.8.[0-9]*) os_name_='Mac OS X Mountain Lion' ;; 10.9|10.9.[0-9]*) os_name_='Mac OS X Mavericks' ;; 10.10|10.10.[0-9]*) os_name_='Mac OS X Yosemite' ;; 10.11|10.11.[0-9]*) os_name_='Mac OS X El Capitan' ;; 10.12|10.12.[0-9]*) os_name_='macOS Sierra' ;; 10.13|10.13.[0-9]*) os_name_='macOS High Sierra' ;; 10.14|10.14.[0-9]*) os_name_='macOS Mojave' ;; 10.15|10.15.[0-9]*) os_name_='macOS Catalina' ;; *) os_name_='macOS' ;; esac ;; FreeBSD) os_name_='FreeBSD' ;; Linux) os_name_='Linux' ;; SunOS) os_name_='SunOS' if [ -r '/etc/release' ]; then if grep 'OpenSolaris' /etc/release >/dev/null; then os_name_='OpenSolaris' else os_name_='Solaris' fi fi ;; esac echo ${os_name_} unset os_name_ os_system_ os_release_ os_version_ } versions_osVersion() { os_version_='unrecognized' os_system_=${UNAME_S} os_release_=${UNAME_R} case ${os_system_} in CYGWIN_NT-*) os_version_=`expr "${os_release_}" : '\([0-9]*\.[0-9]\.[0-9]*\).*'` ;; Darwin) os_version_=`/usr/bin/sw_vers -productVersion` ;; FreeBSD) os_version_=`expr "${os_release_}" : '\([0-9]*\.[0-9]*\)-.*'` ;; Linux) if [ -r '/etc/os-release' ]; then os_version_=`awk -F= '$1~/PRETTY_NAME/{print $2}' /etc/os-release \ |sed 's/"//g'` elif [ -r '/etc/redhat-release' ]; then os_version_=`cat /etc/redhat-release` elif [ -r '/etc/SuSE-release' ]; then os_version_=`head -n 1 /etc/SuSE-release` elif [ -r "${LSB_RELEASE}" ]; then if grep -q 'DISTRIB_ID=Ubuntu' "${LSB_RELEASE}"; then # shellcheck disable=SC2002 os_version_=`cat "${LSB_RELEASE}" \ |awk -F= '$1~/DISTRIB_DESCRIPTION/{print $2}' \ |sed 's/"//g;s/ /-/g'` fi fi ;; SunOS) if [ -r '/etc/release' ]; then if grep 'OpenSolaris' /etc/release >/dev/null; then # OpenSolaris os_version_=`grep 'OpenSolaris' /etc/release |awk '{print $2"("$3")"}'` else # Solaris major_=`echo "${os_release_}" |sed 's/[0-9]*\.\([0-9]*\)/\1/'` minor_=`grep Solaris /etc/release |sed 's/[^u]*\(u[0-9]*\).*/\1/'` os_version_="${major_}${minor_}" fi fi ;; esac echo "${os_version_}" unset os_release_ os_system_ os_version_ major_ minor_ } versions_shellVersion() { shell_=$1 shell_present_=${FALSE} case "${shell_}" in ash) [ -x '/bin/busybox' ] && shell_present_=${TRUE} ;; *) [ -x "${shell_}" ] && shell_present_=${TRUE} ;; esac if [ ${shell_present_} -eq ${FALSE} ]; then echo 'not installed' return ${FALSE} fi version_='' case ${shell_} in # SunOS shells. /sbin/sh) ;; /usr/xpg4/bin/sh) version_=`versions_shell_xpg4 "${shell_}"` ;; # Generic shell. */sh) # This could be one of any number of shells. Try until one fits. version_='' [ -z "${version_}" ] && version_=`versions_shell_bash "${shell_}"` # dash cannot be self determined yet [ -z "${version_}" ] && version_=`versions_shell_ksh "${shell_}"` # pdksh is covered in versions_shell_ksh() [ -z "${version_}" ] && version_=`versions_shell_xpg4 "${shell_}"` [ -z "${version_}" ] && version_=`versions_shell_zsh "${shell_}"` ;; # Specific shells. ash) version_=`versions_shell_ash "${shell_}"` ;; # bash - Bourne Again SHell (https://www.gnu.org/software/bash/) */bash) version_=`versions_shell_bash "${shell_}"` ;; */dash) version_=`versions_shell_dash` ;; # ksh - KornShell (http://www.kornshell.com/) */ksh) version_=`versions_shell_ksh "${shell_}"` ;; # mksh - MirBSD Korn Shell (http://www.mirbsd.org/mksh.htm) */mksh) version_=`versions_shell_ksh "${shell_}"` ;; # pdksh - Public Domain Korn Shell (http://web.cs.mun.ca/~michael/pdksh/) */pdksh) version_=`versions_shell_pdksh "${shell_}"` ;; # zsh (https://www.zsh.org/) */zsh) version_=`versions_shell_zsh "${shell_}"` ;; # Unrecognized shell. *) version_='invalid' esac echo "${version_:-unknown}" unset shell_ version_ } # The ash shell is included in BusyBox. versions_shell_ash() { busybox --help |head -1 |sed 's/BusyBox v\([0-9.]*\) .*/\1/' } versions_shell_bash() { $1 --version : 2>&1 |grep 'GNU bash' |sed 's/.*version \([^ ]*\).*/\1/' } # Assuming Ubuntu Linux until somebody comes up with a better test. The # following test will return an empty string if dash is not installed. versions_shell_dash() { eval dpkg >/dev/null 2>&1 [ $? -eq 127 ] && return # Return if dpkg not found. dpkg -l |grep ' dash ' |awk '{print $3}' } versions_shell_ksh() { versions_shell_=$1 versions_version_='' # Try a few different ways to figure out the version. versions_version_=`${versions_shell_} --version : 2>&1` # shellcheck disable=SC2181 if [ $? -eq 0 ]; then versions_version_=`echo "${versions_version_}" \ |sed 's/.*\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\).*/\1/'` else versions_version_='' fi if [ -z "${versions_version_}" ]; then # shellcheck disable=SC2016 versions_version_=`${versions_shell_} -c 'echo ${KSH_VERSION}'` fi if [ -z "${versions_version_}" ]; then _versions_have_strings versions_version_=`strings "${versions_shell_}" 2>&1 \ |grep Version \ |sed 's/^.*Version \(.*\)$/\1/;s/ s+ \$$//;s/ /-/g'` fi if [ -z "${versions_version_}" ]; then versions_version_=`versions_shell_pdksh "${versions_shell_}"` fi echo "${versions_version_}" unset versions_shell_ versions_version_ } # mksh - MirBSD Korn Shell (http://www.mirbsd.org/mksh.htm) # mksh is a successor to pdksh (Public Domain Korn Shell). versions_shell_mksh() { versions_shell_ksh } # pdksh - Public Domain Korn Shell # pdksh is an obsolete shell, which was replaced by mksh (among others). versions_shell_pdksh() { _versions_have_strings strings "$1" 2>&1 \ |grep 'PD KSH' \ |sed -e 's/.*PD KSH \(.*\)/\1/;s/ /-/g' } versions_shell_xpg4() { _versions_have_strings strings "$1" 2>&1 \ |grep 'Version' \ |sed -e 's/^@(#)Version //' } versions_shell_zsh() { versions_shell_=$1 # Try a few different ways to figure out the version. # shellcheck disable=SC2016 versions_version_=`echo 'echo ${ZSH_VERSION}' |${versions_shell_}` if [ -z "${versions_version_}" ]; then versions_version_=`${versions_shell_} --version : 2>&1` # shellcheck disable=SC2181 if [ $? -eq 0 ]; then versions_version_=`echo "${versions_version_}" |awk '{print $2}'` else versions_version_='' fi fi echo "${versions_version_}" unset versions_shell_ versions_version_ } # Determine if the 'strings' binary installed. _versions_have_strings() { [ ${__versions_haveStrings} -ne ${ERROR} ] && return if eval strings /dev/null >/dev/null 2>&1; then __versions_haveStrings=${TRUE} return fi echo 'WARN: strings not installed. try installing binutils?' >&2 __versions_haveStrings=${FALSE} } 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: ${shell_version}" done } if [ "${ARGV0}" = 'versions' ]; then versions_main "$@" fi