pwd: /out/package
ppid: 14
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo "<1.'txt'
   3: WRITELN " < 1.txt >> 2."'txt'"
   4: WRITELN cat 1.txt
   5: WRITELN cat 2."'txt'"
   6: WRITELN ls
   7: WRITELN exit