The code is simplified
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62101b193f
commit
989550aea1
199
packelf.sh
199
packelf.sh
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@ -3,141 +3,92 @@
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set -e
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# These vars will be modified automatically with sed
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run_mode=packer
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compress_flag=-z
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program=
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ld_so=
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load() {
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script_path="$0"
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while link_path=$(readlink "$script_path"); do
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script_path="$link_path"
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done
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unpack_dir=$(dirname "$script_path")
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exec "$unpack_dir/$program.res/$ld_so" \
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--library-path "$unpack_dir/$program.res" \
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"$unpack_dir/$program.res/$program" "$@"
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# unreachable
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}
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if [ "$run_mode" = loader ]; then
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load "$@"
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fi
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pack_help() {
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echo "$0 <ELF_SRC_PATH> <DST_PATH> [ADDITIONAL_LIBS]"
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unpack() {
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filename=$1
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echo "#!/usr/bin/env sh" > $filename
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echo "#set -o pipefail # bash extension" >> $filename
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echo "set -e" >> $filename
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echo "" >> $filename
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echo "compress_flag=$compress_flag" >> $filename
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echo "executable_run=$2" >> $filename
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echo "tmp_parent=/tmp" >> $filename
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echo 'if [ "$1" = "--packelf-extract" ] ; then' >> $filename
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echo ' mkdir -p packelf-files' >> $filename
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echo " echo \"Extracting to 'packelf-files'\"" >> $filename
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echo " sed '1,/^#__END__\$/d' \"\$0\" | tar \$compress_flag -x -C packelf-files" >> $filename
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echo " exit 0" >> $filename
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echo "fi" >> $filename
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echo 'mkdir -p "$tmp_parent"' >> $filename
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echo 'unpack_dir=$(mktemp -d -p "$tmp_parent" || echo "$tmp_parent")' >> $filename
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echo "sed '1,/^#__END__\$/d' \"\$0\" | tar \$compress_flag -x -C \"\$unpack_dir\"" >> $filename
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echo "chmod 777 -R \"\$unpack_dir\"/* 2> /dev/null" >> $filename
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echo '"$unpack_dir/$executable_run" "$@"' >> $filename
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echo "rm -rf \$unpack_dir" >> $filename
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echo "exit 0" >> $filename
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echo "#__END__" >> $filename
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}
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pack() {
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[ $# -ge 2 ] || {
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pack_help
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exit 1
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folder=$1
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filename=$2
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executable_run=$3
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temp_file=$(mktemp)
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current_dir=$(pwd)
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if [ ! -d "$folder" ] ; then
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echo "Folder $folder does not exist"
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exit 0
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fi
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#echo "Creating executable $2"
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unpack $filename $executable_run
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cd $folder
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chmod 777 -R * 2> /dev/null
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tar $compress_flag -c -f $temp_file *
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cd ${current_dir}
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cat $temp_file >> $filename
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rm -rf $temp_file
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echo "Created successfully"
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}
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case $1 in
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-h|--help)
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pack_help
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help() {
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echo "$0 <ELF_SRC_PATH> <DST_PATH>"
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exit 0
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;;
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*)
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;;
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esac
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}
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src="$1"
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shift
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dst="$1"
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shift
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libs="$(ldd "$src" | grep -F '/' | sed -E 's|[^/]*/([^ ]+).*?|/\1|')"
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if [ ! -z "$1" ] ; then
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if [ ! -f "$1" ] ; then
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echo "$0: File $1 does not exist"
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exit 1
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else
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libs="$(ldd "$1" | grep -F '/' | sed -E 's|[^/]*/([^ ]+).*?|/\1|')"
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ld_so="$(echo "$libs" | grep -F '/ld-linux-' || echo "$libs" | grep -F '/ld-musl-' || echo "$libs" | grep -F '/ld.so')"
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ld_so="$(basename "$ld_so")"
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program="$(basename "$src")"
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cat "$0" | sed -E \
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-e 's/^run_mode=[^ ]*$/run_mode=unpacker/' \
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-e 's/^compress_flag=[^ ]*$/compress_flag='"$compress_flag"'/' \
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-e 's/^program=[^ ]*$/program='"$program"'/' \
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-e 's/^ld_so=[^ ]*$/ld_so='"$ld_so"'/' \
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>"$dst"
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echo "Creating static executable $dst from $src"
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for libraries in ${libs} ; do
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echo "Linking library ${libraries}"
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done
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echo "Creating executable linker"
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echo "Building static executable in $dst"
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tar $compress_flag -ch --transform 's@.*/@'"$program"'.res/@' "$src" $libs "$@" >>"$dst"
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chmod +x "$dst"
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echo "Created successfully"
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#echo "'$src' was packed to '$dst'"
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echo ""
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echo "$dst" | grep -q / || dst="./$dst"
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echo "Just run '$dst <ARGS>' to execute the command."
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echo "Or run 'PACKELF_UNPACK_DIR=xxx $dst' to unpack it only."
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}
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unpack() {
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if [ -n "$PACKELF_UNPACK_DIR" ]; then
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[ -d "$PACKELF_UNPACK_DIR" ] || {
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echo "'$PACKELF_UNPACK_DIR' is not a dir."
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program="$(basename "$1")"
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if [ -z "$libs" ] ; then
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echo "$0: Not a dynamic executable"
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exit 1
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}
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[ -e "$PACKELF_UNPACK_DIR/$program" ] && {
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echo "'$PACKELF_UNPACK_DIR/$program' already exists, please remove it first."
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exit 1
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}
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unpack_dir="$PACKELF_UNPACK_DIR"
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fi
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fi
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else
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if [ -n "$PACKELF_TMP_DIR" ]; then
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unpack_dir="$PACKELF_TMP_DIR"
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else
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tmp_parent=/tmp
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mkdir -p "$tmp_parent"
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unpack_dir=$(mktemp -d -p "$tmp_parent" || echo "$tmp_parent")
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fi
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trap 'rm -rf "$unpack_dir"' 0 1 2 3 6 10 12 13 14 15
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fi
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check_path="$unpack_dir/__check_permission__"
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if ! (echo > "$check_path" && chmod +x "$check_path" && [ -x "$check_path" ]); then
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rm -rf "$unpack_dir"
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tmp_parent="$(pwd)/packelf_tmp"
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mkdir -p "$tmp_parent"
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unpack_dir="$(mktemp -d -p "$tmp_parent" || echo "$tmp_parent")"
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fi
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sed '1,/^#__END__$/d' "$0" | tar $compress_flag -x -C "$unpack_dir"
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sed -i 's@/etc/ld.so.preload@/etc/___so.preload@g' "$unpack_dir/$program.res/$ld_so"
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if [ -n "$PACKELF_UNPACK_DIR" ]; then
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sed '/^#__END__$/,$d' "$0" > "$unpack_dir/$program"
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sed -i -E 's/^run_mode=\w*$/run_mode=loader/' "$unpack_dir/$program"
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chmod +x "$unpack_dir/$program"
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rm -f "$check_path"
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echo "'$program' was unpacked to '$unpack_dir'."
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echo "$unpack_dir" | grep -q / || unpack_dir="./$unpack_dir"
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echo "You can run '$unpack_dir/$program ARGS...' to execute the command."
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else
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"$unpack_dir/$program.res/$ld_so" \
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--library-path "$unpack_dir/$program.res" \
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"$unpack_dir/$program.res/$program" "$@"
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exit $?
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fi
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}
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if [ "$run_mode" = unpacker ]; then
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unpack "$@"
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else
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pack "$@"
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fi
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help
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exit 0
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#__END__
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fi
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if [ -z "$2" ] ; then
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help
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else
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temp_dir=$(mktemp -d)
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echo "Creating static binary ${2} from ${1}"
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echo "Linking libraries"
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cp -L ${1} ${temp_dir}/
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for libraries in ${libs} ; do
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cp -L ${libraries} ${temp_dir}/
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done
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echo "#!/usr/bin/env sh" > ${temp_dir}/AppRun
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echo "" >> ${temp_dir}/AppRun
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echo "\$(dirname \$0)/${ld_so} --library-path \$(dirname \$0) \$(dirname \$0)/${program} \"\$@\"" >> ${temp_dir}/AppRun
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chmod 777 -R "$temp_dir"
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pack "$temp_dir" "$2" AppRun
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fi
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