busybox/applets/usage_compressed
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   1#!/bin/sh
   2
   3target="$1"
   4loc="$2"
   5
   6test "$target" || exit 1
   7test "$loc" || loc=.
   8test -x "$loc/usage" || exit 1
   9test "$SED" || SED=sed
  10test "$DD" || DD=dd
  11
  12# Some people were bitten by their system lacking a (proper) od
  13od -v -b </dev/null >/dev/null
  14if test $? != 0; then
  15        echo 'od tool is not installed or cannot accept "-v -b" options'
  16        exit 1
  17fi
  18
  19exec >"$target.$$"
  20
  21echo '#define UNPACKED_USAGE "" \'
  22"$loc/usage" | od -v -b \
  23| grep -v '^ ' \
  24| $SED -e 's/^[^ ]*//' \
  25        -e 's/ //g' \
  26        -e '/^$/d' \
  27        -e 's/\(...\)/\\\1/g' \
  28        -e 's/^/"/' \
  29        -e 's/$/" \\/'
  30echo ''
  31# "grep -v '^ '" is for toybox's od bug: od -b prints some extra lines:
  32#0000000 010 000 010 000 133 055 144 146 135 040 133 055 143 040 103 117
  33#         000010 000010 026533 063144 020135 026533 020143 047503
  34#0000020 116 106 104 111 122 135 040 133 055 154 040 114 117 107 106 111
  35#         043116 044504 056522 055440 066055 046040 043517 044506
  36#0000040 114 105 135 040 133 055 141 040 101 103 124 111 117 116 106 111
  37#         042514 020135 026533 020141 041501 044524 047117 044506
  38
  39echo "#define UNPACKED_USAGE_LENGTH `$loc/usage | wc -c`"
  40echo
  41
  42echo '#define PACKED_USAGE \'
  43## Breaks on big-endian systems!
  44## # Extra effort to avoid using "od -t x1": -t is not available
  45## # in non-CONFIG_DESKTOPed busybox od
  46##
  47## "$loc/usage" | bzip2 -1 | od -v -x \
  48## | $SED -e 's/^[^ ]*//' \
  49##      -e 's/ //g' \
  50##      -e '/^$/d' \
  51##      -e 's/\(..\)\(..\)/0x\2,0x\1,/g'
  52##      -e 's/$/ \\/'
  53"$loc/usage" | bzip2 -1 | $DD bs=2 skip=1 2>/dev/null | od -v -b \
  54| grep -v '^ ' \
  55| $SED -e 's/^[^ ]*//' \
  56        -e 's/ //g' \
  57        -e '/^$/d' \
  58        -e 's/\(...\)/0\1,/g' \
  59        -e 's/$/ \\/'
  60echo ''
  61
  62mv -- "$target.$$" "$target"
  63