Simple alternative to /usr/bin/lsb_release

lsb_release

#!/bin/sh
#
# This is a simple alternative to /usr/bin/lsb_release which
# doesn't require python.
#
# If /etc/os-release exists then we use that to output data
# in a compatible format to the original lsb_release utility.
#
# I consider this script trivial enough to be in the public-domain,
# but any patches or suggestsions will be welcome.
#
# Steve
# --
#



show_help() {
    cat << EOF
Usage: lsb_release [options]

Options:
  -h, --help         show this help message and exit
  -i, --id           show distributor ID
  -d, --description  show description of this distribution
  -r, --release      show release number of this distribution
  -c, --codename     show code name of this distribution
  -a, --all          show all of the above information
  -s, --short        show requested information in short format
EOF
    exit 0
}


#
#  Potential command-line options.
#
all=0
codename=0
description=0
id=0
release=0
short=0
version=0


#
#  Process each argument, and set the appropriate flag
# if we recognize it.
#
while :; do
    case $1 in
        -a|--all)
            all=1
            ;;
        -c|--codename)
            codename=1
            ;;
        -d|--description)
            description=1
            ;;
        -h|--help)
            show_help
            break
            ;;
        -i|--id)
            id=1
            ;;
        -r|--release)
            release=1
            ;;
        -s|--short)
            short=1
            ;;
        -v|--version)
            version=1
            ;;
        *)
            break
    esac
    shift
done


#
#  Read our variables.
#
if [ -e /etc/os-release ]; then
    . /etc/os-release
else
    echo "/etc/os-release is not present.  Aborting" >&2
    exit 1
fi


#
#  Now output the data - The order of these was chosen to match
# what the original lsb_release used, and while I suspect it doesn't
# matter I kept it the same.
#
if [ "$all" = "1" ] || [ "$id" = "1" ]; then
    if [ "$short" = "0" ]; then
        printf "Distributor ID:\t"
    fi
    echo $ID
fi

if [ "$all" = "1" ] || [ "$description" = "1" ]; then
    if [ "$short" = "0" ]; then
        printf "Description:\t"
    fi
    echo $PRETTY_NAME
fi

if [ "$all" = "1" ] || [ "$release" = "1" ]; then
    if [ "$short" = "0" ]; then
        printf "Release:\t"
    fi
    echo $VERSION_ID
fi

if [ "$all" = "1" ] || [ "$codename" = "1" ]; then
    if [ "$short" = "0" ]; then
        printf "Codename:\t"
    fi

    #
    #  Codename comes from: VERSION="7 (wheezy)"
    #
    ver=$(echo $VERSION | awk '{print $2}' | tr -d \(\))
    echo "$ver"
fi


exit 0