4f2ef4a836
To assist in the deployment of shell scripts it may be convenient to embed them in the BusyBox binary. 'Embed scripts in the binary' takes any files in the directory 'embed', concatenates them with null separators, compresses them and embeds them in the binary. When scripts are embedded in the binary, scripts can be run as 'busybox SCRIPT [ARGS]' or by usual (sym)link mechanism. embed/nologin is provided as an example. function old new delta packed_scripts - 123 +123 unpack_scripts - 87 +87 ash_main 1103 1171 +68 run_applet_and_exit 78 128 +50 get_script_content - 32 +32 script_names - 10 +10 expmeta 663 659 -4 ------------------------------------------------------------------------------ (add/remove: 4/0 grow/shrink: 2/1 up/down: 370/-4) Total: 366 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
67 lines
1.1 KiB
Bash
Executable File
67 lines
1.1 KiB
Bash
Executable File
#!/bin/sh
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target="$1"
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loc="$2"
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test "$target" || exit 1
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test "$SED" || SED=sed
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test "$DD" || DD=dd
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# Some people were bitten by their system lacking a (proper) od
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od -v -b </dev/null >/dev/null
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if test $? != 0; then
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echo 'od tool is not installed or cannot accept "-v -b" options'
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exit 1
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fi
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exec >"$target.$$"
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scripts=""
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if [ -d "$loc" ]
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then
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scripts=$(cd $loc; ls * 2>/dev/null)
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fi
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n=$(echo $scripts | wc -w)
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if [ $n -ne 0 ]
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then
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printf '#ifdef DEFINE_script_names\n'
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printf 'const char script_names[] ALIGN1 = '
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for i in $scripts
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do
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printf '"%s\\0"' $i
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done
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printf '"\\0";\n'
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printf '#else\n'
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printf 'extern const char script_names[] ALIGN1;\n'
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printf '#endif\n'
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fi
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printf "#define NUM_SCRIPTS $n\n\n"
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if [ $n -ne 0 ]
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then
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printf '#define UNPACKED_SCRIPTS_LENGTH '
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for i in $scripts
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do
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cat $loc/$i
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printf '\000'
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done | wc -c
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printf '#define PACKED_SCRIPTS \\\n'
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for i in $scripts
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do
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cat $loc/$i
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printf '\000'
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done | bzip2 -1 | $DD bs=2 skip=1 2>/dev/null | od -v -b \
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| grep -v '^ ' \
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| $SED -e 's/^[^ ]*//' \
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-e 's/ //g' \
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-e '/^$/d' \
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-e 's/\(...\)/0\1,/g' \
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-e 's/$/ \\/'
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printf '\n'
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fi
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mv -- "$target.$$" "$target"
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