pwd: /out/package
ppid: 4637
   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
exit: 0

mumsh $ mumsh $ > mumsh $ 123
mumsh $ <1.'txt'

mumsh $ 1.txt
2.'txt'
driver
mumsh
mumsh_memory_check
mumsh $ exit

mumsh $ mumsh $ > mumsh $ 123
mumsh $ <1.'txt'

mumsh $ 1.txt
2.'txt'
driver
mumsh
mumsh_memory_check
mumsh $ exit