selfrun.sh

#!/bin/bash
# selfrun.sh <executable>
# creates "<executable>.standalone" containing "." and extracting&running itself.
export _ROOT="/tmp/.nc.selfrun.$(uuidgen)-$(uuidgen)"
cat > "${1}.standalone" <<END
#!/bin/bash
export self="\$(readlink -f "\$0")"
if test -e $_ROOT
  then cd $_ROOT
else
  mkdir $_ROOT
  cd $_ROOT
  tail -n +11 "\$self" | tar xj
fi
exec ./${1} "\$@"
END
tar cj * >> "${1}.standalone"
chmod +rx "${1}.standalone"