pkgs/os-specific/linux/lsb-release/lsb_release.sh

   1 #! @shell@
   2
   3 set -o errexit
   4 set -o nounset
   5
   6 show_help() {
   7   @coreutils@/bin/cat << EOF
   8 Usage: lsb_release [options]
   9
  10 Options:
  11   -h, --help         show this help message and exit
  12   -v, --version      show LSB modules this system supports
  13   -i, --id           show distributor ID
  14   -d, --description  show description of this distribution
  15   -r, --release      show release number of this distribution
  16   -c, --codename     show code name of this distribution
  17   -a, --all          show all of the above information
  18   -s, --short        show requested information in short format
  19 EOF
  20   exit 0
  21 }
  22
  23 # Potential command-line options.
  24 version=0
  25 id=0
  26 description=0
  27 release=0
  28 codename=0
  29 all=0
  30 short=0
  31
  32 @getopt@/bin/getopt --test > /dev/null && rc=$? || rc=$?
  33 if [[ $rc -ne 4 ]]; then
  34   # This shouldn't happen.
  35   echo "Warning: Enhanced getopt not supported, please open an issue in nixpkgs." >&2
  36 else
  37   # Define all short and long options.
  38   SHORT=hvidrcas
  39   LONG=help,version,id,description,release,codename,all,short
  40
  41   # Parse all options.
  42   PARSED=`@getopt@/bin/getopt --options $SHORT --longoptions $LONG --name "$0" -- "$@"`
  43
  44   eval set -- "$PARSED"
  45 fi
  46
  47
  48 # Process each argument, and set the appropriate flag if we recognize it.
  49 while [[ $# -ge 1 ]]; do
  50   case "$1" in
  51     -v|--version)
  52       version=1
  53       ;;
  54     -i|--id)
  55       id=1
  56       ;;
  57     -d|--description)
  58       description=1
  59       ;;
  60     -r|--release)
  61       release=1
  62       ;;
  63     -c|--codename)
  64       codename=1
  65       ;;
  66     -a|--all)
  67       all=1
  68       ;;
  69     -s|--short)
  70       short=1
  71       ;;
  72     -h|--help)
  73       show_help
  74       ;;
  75     --)
  76       shift
  77       break
  78       ;;
  79     *)
  80       echo "lsb_release: unrecognized option '$1'"
  81       echo "Type 'lsb_release -h' for a list of available options."
  82       exit 1
  83       ;;
  84   esac
  85   shift
  86 done
  87
  88 #  Read our variables.
  89 if [[ -e /etc/os-release ]]; then
  90   . /etc/os-release
  91   OS_RELEASE_FOUND=1
  92 else
  93   # This is e.g. relevant for the Nix build sandbox and compatible with the
  94   # original lsb_release binary:
  95   OS_RELEASE_FOUND=0
  96   NAME="n/a"
  97   PRETTY_NAME="(none)"
  98   VERSION_ID="n/a"
  99   VERSION_CODENAME="n/a"
 100 fi
 101
 102 # Default output
 103 if [[ "$version" = "0" ]] && [[ "$id" = "0" ]] && \
 104    [[ "$description" = "0" ]] && [[ "$release" = "0" ]] && \
 105    [[ "$codename" = "0" ]] && [[ "$all" = "0" ]]; then
 106   if [[ "$OS_RELEASE_FOUND" = "1" ]]; then
 107     echo "No LSB modules are available." >&2
 108   else
 109     if [[ "$short" = "0" ]]; then
 110       printf "LSB Version:\tn/a\n"
 111     else
 112       printf "n/a\n"
 113     fi
 114   fi
 115   exit 0
 116 fi
 117
 118 # Now output the data - The order of these was chosen to match
 119 # what the original lsb_release used.
 120
 121 SHORT_OUTPUT=""
 122 append_short_output() {
 123   if [[ "$1" = "n/a" ]]; then
 124     SHORT_OUTPUT+=" $1"
 125   else
 126     SHORT_OUTPUT+=" \"$1\""
 127   fi
 128 }
 129
 130 if [[ "$all" = "1" ]] || [[ "$version" = "1" ]]; then
 131   if [[ "$OS_RELEASE_FOUND" = "1" ]]; then
 132     if [[ "$short" = "0" ]]; then
 133       echo "No LSB modules are available." >&2
 134     else
 135       append_short_output "n/a"
 136     fi
 137   else
 138     if [[ "$short" = "0" ]]; then
 139       printf "LSB Version:\tn/a\n"
 140     else
 141       append_short_output "n/a"
 142     fi
 143   fi
 144 fi
 145
 146 if [[ "$all" = "1" ]] || [[ "$id" = "1" ]]; then
 147   if [[ "$short" = "0" ]]; then
 148     printf "Distributor ID:\t$NAME\n"
 149   else
 150     append_short_output "$NAME"
 151   fi
 152 fi
 153
 154 if [[ "$all" = "1" ]] || [[ "$description" = "1" ]]; then
 155   if [[ "$short" = "0" ]]; then
 156     printf "Description:\t$PRETTY_NAME\n"
 157   else
 158     append_short_output "$PRETTY_NAME"
 159   fi
 160 fi
 161
 162 if [[ "$all" = "1" ]] || [[ "$release" = "1" ]]; then
 163   if [[ "$short" = "0" ]]; then
 164     printf "Release:\t$VERSION_ID\n"
 165   else
 166     append_short_output "$VERSION_ID"
 167   fi
 168 fi
 169
 170 if [[ "$all" = "1" ]] || [[ "$codename" = "1" ]]; then
 171   if [[ "$short" = "0" ]]; then
 172     printf "Codename:\t$VERSION_CODENAME\n"
 173   else
 174     append_short_output "$VERSION_CODENAME"
 175   fi
 176 fi
 177
 178 if [[ "$short" = "1" ]]; then
 179   # Output in one line without the first space:
 180   echo "${SHORT_OUTPUT:1}"
 181 fi
 182
 183 # For compatibility with the original lsb_release:
 184 if [[ "$OS_RELEASE_FOUND" = "0" ]]; then
 185   if [[ "$all" = "1" ]] || [[ "$id" = "1" ]] || \
 186      [[ "$description" = "1" ]] || [[ "$release" = "1" ]] || \
 187      [[ "$codename" = "1" ]]; then
 188     exit 3
 189   fi
 190 fi