became

   1 #!/bin/bash
   2
   3 file="$(mktemp)"
   4 if [ -n "$file" ]; then
   5   ( umask 077; cat > "$file"; echo "/bin/rm -f '$file'" >> "$file" )
   6   exec </dev/tty /bin/bash --rcfile "$file"
   7 else
   8 # Fall back to the shell.
   9   exec </dev/tty /bin/bash
  10 fi
  11 exit 111