feat(script): keep the folder with readme updates

README.md

@@ -1,14 +1,25 @@
 `packelf` was inspired by [the idea of Klaus D](https://askubuntu.com/a/546305). It is used to package the elf executable and its dependent libraries into a single executable.
 
-
-
 ## usage
 
 ```
 packelf.sh <ELF_SRC_PATH> <DST_PATH> [ADDITIONAL_LIBS ...]
 ```
 
+Requirements on the machine: `touch`, `tar`, `sh` and `mktemp`
 
+```
+packelf-kf.sh <ELF_SRC_PATH> <DST_PATH> [ADDITIONAL_LIBS ...]
+```
+
+Requirements on the machine: `tar`, `sh` and `mkdir`
+
+This other version doens't extract everytime the package if already exists.
+Perfect for tiny packages.
+
+## how works
+
+Generate a tar that include all the llibraries from the host, with a tiny shell script embedded use LS Preload to execute the program.
 
 ## example
 

packelf-kf.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+set -eo pipefail
+
+[ $# -lt 2 ] && {
+    echo "usage: $0 <ELF_SRC_PATH> <DST_PATH> [ADDITIONAL_LIBS ...]"
+    exit 1
+}
+
+src="$1"
+dst="$2"
+shift
+shift
+
+libs="$(ldd "$src" | grep -F '/' | sed -E 's|[^/]*/([^ ]+).*?|/\1|')"
+ld_so="$(echo "$libs" | grep -F '/ld-linux-')"
+ld_so="$(basename "$ld_so")"
+program="$(basename "$src")"
+
+cat >"$dst" <<EOF
+#!/usr/bin/env sh
+tmp_dir="/tmp/static-$program"
+if [ ! -d "\$tmp_dir" ]; then
+    mkdir "\$tmp_dir"
+    sed '1,/^#__END__$/d' "\$0" | tar -xz -C "\$tmp_dir"
+    sed -i 's@/etc/ld.so.preload@/etc/___so.preload@g' "\$tmp_dir/$ld_so"
+fi
+"\$tmp_dir/$ld_so" --library-path "\$tmp_dir" "\$tmp_dir/$program" "\$@"
+exit \$?
+#__END__
+EOF
+
+tar -czh --transform 's/.*\///g' "$src" $libs "$@" >>"$dst" 2> >(grep -v 'Removing leading' >&2)
+chmod +x "$dst"

packelf.sh

@@ -17,7 +17,7 @@ ld_so="$(basename "$ld_so")"
 program="$(basename "$src")"
 
 cat >"$dst" <<EOF
-#!/bin/bash
+#!/usr/bin/env sh
 tmp_dir="\$(mktemp -d)"
 check_path="\$tmp_dir/__check_permission__"
 trap 'rm -rf \$tmp_dir' 0 1 2 3 6